From 105c31df6fc5a424b480321763b5598cf3817821 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 8 Jan 2009 08:31:20 -0600
Subject: powerpc/fsl-booke: Cleanup init/exception setup to be runtime

We currently have a few variants of fsl-booke processors (e500v1, e500v2,
e500mc, and e200).  They all have minor differences that we had previously
been handling via ifdefs.

To move towards having this support the following changes have been made:

* PID1, PID2 only exist on e500v1 & e500v2 and should not be accessed on
  e500mc or e200.  We use MMUCFG[NPIDS] to determine which case we are
  since we only touch PID1/2 in extremely early init code.

* Not all IVORs exist on all the processors so introduce cpu_setup
  functions for each variant to setup the proper IVORs that are either
  unique or exist but have some variations between the processors

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 arch/powerpc/kernel/Makefile              |  1 +
 arch/powerpc/kernel/cpu_setup_fsl_booke.S | 31 ++++++++++++
 arch/powerpc/kernel/cputable.c            |  8 +++
 arch/powerpc/kernel/head_booke.h          |  6 +--
 arch/powerpc/kernel/head_fsl_booke.S      | 81 ++++++++++++++++++++-----------
 5 files changed, 97 insertions(+), 30 deletions(-)
 create mode 100644 arch/powerpc/kernel/cpu_setup_fsl_booke.S

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 8d1a419df35d..d15992119085 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_HIBERNATION)	+= swsusp.o suspend.o \
 obj64-$(CONFIG_HIBERNATION)	+= swsusp_asm64.o
 obj-$(CONFIG_MODULES)		+= module.o module_$(CONFIG_WORD_SIZE).o
 obj-$(CONFIG_44x)		+= cpu_setup_44x.o
+obj-$(CONFIG_FSL_BOOKE)		+= cpu_setup_fsl_booke.o
 
 extra-$(CONFIG_PPC_STD_MMU)	:= head_32.o
 extra-$(CONFIG_PPC64)		:= head_64.o
diff --git a/arch/powerpc/kernel/cpu_setup_fsl_booke.S b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
new file mode 100644
index 000000000000..eb4b9adcedb4
--- /dev/null
+++ b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
@@ -0,0 +1,31 @@
+/*
+ * This file contains low level CPU setup functions.
+ * Kumar Gala <galak@kernel.crashing.org>
+ * Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * Based on cpu_setup_6xx code by
+ * Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <asm/processor.h>
+#include <asm/cputable.h>
+#include <asm/ppc_asm.h>
+
+_GLOBAL(__setup_cpu_e200)
+	/* enable dedicated debug exception handling resources (Debug APU) */
+	mfspr	r3,SPRN_HID0
+	ori	r3,r3,HID0_DAPUEN@l
+	mtspr	SPRN_HID0,r3
+	b	__setup_e200_ivors
+_GLOBAL(__setup_cpu_e500v1)
+_GLOBAL(__setup_cpu_e500v2)
+	b	__setup_e500_ivors
+_GLOBAL(__setup_cpu_e500mc)
+	b	__setup_e500mc_ivors
+
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 923f87aff20a..9fdf1b8027b5 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -35,6 +35,10 @@ const char *powerpc_base_platform;
  * and ppc64
  */
 #ifdef CONFIG_PPC32
+extern void __setup_cpu_e200(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_e500v1(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_e500v2(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_e500mc(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440ep(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440epx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440gx(unsigned long offset, struct cpu_spec* spec);
@@ -1687,6 +1691,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
 			PPC_FEATURE_UNIFIED_CACHE,
 		.mmu_features		= MMU_FTR_TYPE_FSL_E,
 		.dcache_bsize		= 32,
+		.cpu_setup		= __setup_cpu_e200,
 		.machine_check		= machine_check_e200,
 		.platform		= "ppc5554",
 	}
@@ -1706,6 +1711,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.num_pmcs		= 4,
 		.oprofile_cpu_type	= "ppc/e500",
 		.oprofile_type		= PPC_OPROFILE_FSL_EMB,
+		.cpu_setup		= __setup_cpu_e500v1,
 		.machine_check		= machine_check_e500,
 		.platform		= "ppc8540",
 	},
@@ -1724,6 +1730,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.num_pmcs		= 4,
 		.oprofile_cpu_type	= "ppc/e500",
 		.oprofile_type		= PPC_OPROFILE_FSL_EMB,
+		.cpu_setup		= __setup_cpu_e500v2,
 		.machine_check		= machine_check_e500,
 		.platform		= "ppc8548",
 	},
@@ -1739,6 +1746,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.num_pmcs		= 4,
 		.oprofile_cpu_type	= "ppc/e500", /* xxx - galak, e500mc? */
 		.oprofile_type		= PPC_OPROFILE_FSL_EMB,
+		.cpu_setup		= __setup_cpu_e500mc,
 		.machine_check		= machine_check_e500,
 		.platform		= "ppce500mc",
 	},
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index fce2df988504..bec18078239d 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -70,10 +70,10 @@
 
 /* only on e500mc/e200 */
 #define DEBUG_STACK_BASE	dbgirq_ctx
-#ifdef CONFIG_PPC_E500MC
-#define DEBUG_SPRG		SPRN_SPRG9
-#else
+#ifdef CONFIG_E200
 #define DEBUG_SPRG		SPRN_SPRG6W
+#else
+#define DEBUG_SPRG		SPRN_SPRG9
 #endif
 
 #define EXC_LVL_FRAME_OVERHEAD	(THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 36ffb3504a4f..64ecb1603a77 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -103,10 +103,15 @@ invstr:	mflr	r6				/* Make it accessible */
 	or	r7,r7,r4
 	mtspr	SPRN_MAS6,r7
 	tlbsx	0,r6				/* search MSR[IS], SPID=PID0 */
-#ifndef CONFIG_E200
 	mfspr	r7,SPRN_MAS1
 	andis.	r7,r7,MAS1_VALID@h
 	bne	match_TLB
+
+	mfspr	r7,SPRN_MMUCFG
+	rlwinm	r7,r7,21,28,31			/* extract MMUCFG[NPIDS] */
+	cmpwi	r7,3
+	bne	match_TLB			/* skip if NPIDS != 3 */
+
 	mfspr	r7,SPRN_PID1
 	slwi	r7,r7,16
 	or	r7,r7,r4
@@ -120,7 +125,7 @@ invstr:	mflr	r6				/* Make it accessible */
 	or	r7,r7,r4
 	mtspr	SPRN_MAS6,r7
 	tlbsx	0,r6				/* Fall through, we had to match */
-#endif
+
 match_TLB:
 	mfspr	r7,SPRN_MAS0
 	rlwinm	r3,r7,16,20,31			/* Extract MAS0(Entry) */
@@ -215,14 +220,19 @@ skpinv:	addi	r6,r6,1				/* Increment */
 
 /* 4. Clear out PIDs & Search info */
 	li	r6,0
+	mtspr   SPRN_MAS6,r6
 	mtspr	SPRN_PID0,r6
-#ifndef CONFIG_E200
+
+	mfspr	r7,SPRN_MMUCFG
+	rlwinm	r7,r7,21,28,31			/* extract MMUCFG[NPIDS] */
+	cmpwi	r7,3
+	bne	2f				/* skip if NPIDS != 3 */
+
 	mtspr	SPRN_PID1,r6
 	mtspr	SPRN_PID2,r6
-#endif
-	mtspr	SPRN_MAS6,r6
 
 /* 5. Invalidate mapping we started in */
+2:
 	lis	r7,0x1000	/* Set MAS0(TLBSEL) = 1 */
 	rlwimi	r7,r3,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r3) */
 	mtspr	SPRN_MAS0,r7
@@ -298,19 +308,7 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	SET_IVOR(12, WatchdogTimer);
 	SET_IVOR(13, DataTLBError);
 	SET_IVOR(14, InstructionTLBError);
-	SET_IVOR(15, DebugDebug);
-#if defined(CONFIG_E500) && !defined(CONFIG_PPC_E500MC)
 	SET_IVOR(15, DebugCrit);
-#endif
-	SET_IVOR(32, SPEUnavailable);
-	SET_IVOR(33, SPEFloatingPointData);
-	SET_IVOR(34, SPEFloatingPointRound);
-#ifndef CONFIG_E200
-	SET_IVOR(35, PerformanceMonitor);
-#endif
-#ifdef CONFIG_PPC_E500MC
-	SET_IVOR(36, Doorbell);
-#endif
 
 	/* Establish the interrupt vector base */
 	lis	r4,interrupt_base@h	/* IVPR only uses the high 16-bits */
@@ -329,12 +327,6 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	oris	r2,r2,HID0_DOZE@h
 	mtspr	SPRN_HID0, r2
 #endif
-#ifdef CONFIG_E200
-	/* enable dedicated debug exception handling resources (Debug APU) */
-	mfspr	r2,SPRN_HID0
-	ori	r2,r2,HID0_DAPUEN@l
-	mtspr	SPRN_HID0,r2
-#endif
 
 #if !defined(CONFIG_BDI_SWITCH)
 	/*
@@ -706,15 +698,11 @@ interrupt_base:
 	/* Performance Monitor */
 	EXCEPTION(0x2060, PerformanceMonitor, performance_monitor_exception, EXC_XFER_STD)
 
-#ifdef CONFIG_PPC_E500MC
 	EXCEPTION(0x2070, Doorbell, unknown_exception, EXC_XFER_STD)
-#endif
 
 	/* Debug Interrupt */
 	DEBUG_DEBUG_EXCEPTION
-#if defined(CONFIG_E500) && !defined(CONFIG_PPC_E500MC)
 	DEBUG_CRIT_EXCEPTION
-#endif
 
 /*
  * Local functions
@@ -897,6 +885,45 @@ KernelSPE:
  * Global functions
  */
 
+/* Adjust or setup IVORs for e200 */
+_GLOBAL(__setup_e200_ivors)
+	li	r3,DebugDebug@l
+	mtspr	SPRN_IVOR15,r3
+	li	r3,SPEUnavailable@l
+	mtspr	SPRN_IVOR32,r3
+	li	r3,SPEFloatingPointData@l
+	mtspr	SPRN_IVOR33,r3
+	li	r3,SPEFloatingPointRound@l
+	mtspr	SPRN_IVOR34,r3
+	sync
+	blr
+
+/* Adjust or setup IVORs for e500v1/v2 */
+_GLOBAL(__setup_e500_ivors)
+	li	r3,DebugCrit@l
+	mtspr	SPRN_IVOR15,r3
+	li	r3,SPEUnavailable@l
+	mtspr	SPRN_IVOR32,r3
+	li	r3,SPEFloatingPointData@l
+	mtspr	SPRN_IVOR33,r3
+	li	r3,SPEFloatingPointRound@l
+	mtspr	SPRN_IVOR34,r3
+	li	r3,PerformanceMonitor@l
+	mtspr	SPRN_IVOR35,r3
+	sync
+	blr
+
+/* Adjust or setup IVORs for e500mc */
+_GLOBAL(__setup_e500mc_ivors)
+	li	r3,DebugDebug@l
+	mtspr	SPRN_IVOR15,r3
+	li	r3,PerformanceMonitor@l
+	mtspr	SPRN_IVOR35,r3
+	li	r3,Doorbell@l
+	mtspr	SPRN_IVOR36,r3
+	sync
+	blr
+
 /*
  * extern void loadcam_entry(unsigned int index)
  *
-- 
cgit v1.2.2


From 33642d31d19c967b9739253912cdd48885509805 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Wed, 14 Jan 2009 20:43:15 +0000
Subject: powerpc: Remove unused ppc64_terminate_msg()

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/setup_64.c | 7 -------
 1 file changed, 7 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 2d34196bba8c..73e16e298e28 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -578,13 +578,6 @@ void ppc64_boot_msg(unsigned int src, const char *msg)
 	printk("[boot]%04x %s\n", src, msg);
 }
 
-/* Print a termination message (print only -- does not stop the kernel) */
-void ppc64_terminate_msg(unsigned int src, const char *msg)
-{
-	ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg);
-	printk("[terminate]%04x %s\n", src, msg);
-}
-
 void cpu_die(void)
 {
 	if (ppc_md.cpu_die)
-- 
cgit v1.2.2


From 059f134f844ec52772353c95693fcb5b86e80193 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Wed, 14 Jan 2009 20:46:01 +0000
Subject: powerpc: Allow debugging of LMBs with lmb=debug

The lmb debugging can be turned on at boottime with lmb=debug on the
command line. However on powerpc that doesn't work, because we don't
necessarily call lmb_dump_all().

So always call lmb_dump_all() after lmb_analyze(), no output is
generated unless lmb=debug is found on the command line.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/prom.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index f00f83109ab3..5ec6a9e23933 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1075,11 +1075,6 @@ static void __init early_reserve_mem(void)
 		DBG("reserving: %llx -> %llx\n", base, size);
 		lmb_reserve(base, size);
 	}
-
-#if 0
-	DBG("memory reserved, lmbs :\n");
-      	lmb_dump_all();
-#endif
 }
 
 #ifdef CONFIG_PHYP_DUMP
@@ -1221,6 +1216,7 @@ void __init early_init_devtree(void *params)
 	lmb_enforce_memory_limit(limit);
 
 	lmb_analyze();
+	lmb_dump_all();
 
 	DBG("Phys. mem: %lx\n", lmb_phys_mem_size());
 
-- 
cgit v1.2.2


From c3bd517de67d33c44059656194e316facef181a5 Mon Sep 17 00:00:00 2001
From: Milton Miller <miltonm@bga.com>
Date: Thu, 8 Jan 2009 02:19:46 +0000
Subject: powerpc/pci: Move hose_list and pci_address_to_pio to pci-common

move the definition of hose_list next to its hotplug spinlock.

create pcibios_io_size to encapsulate ifdef in existing pci-common
function pcibios_vaddr_is_ioport

move pci_address_to_pio to pci-common, using new pcibios_io_size, and
protect this GPL exported function against concurrent hotplug removal

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci-common.c | 41 ++++++++++++++++++++++++++++++++++------
 arch/powerpc/kernel/pci_32.c     | 21 +-------------------
 arch/powerpc/kernel/pci_64.c     | 19 -------------------
 3 files changed, 36 insertions(+), 45 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 0f4181272311..2ad17315fc88 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -38,6 +38,7 @@
 #include <asm/eeh.h>
 
 static DEFINE_SPINLOCK(hose_spinlock);
+LIST_HEAD(hose_list);
 
 /* XXX kill that some day ... */
 static int global_phb_number;		/* Global phb counter */
@@ -113,19 +114,24 @@ void pcibios_free_controller(struct pci_controller *phb)
 		kfree(phb);
 }
 
+static resource_size_t pcibios_io_size(const struct pci_controller *hose)
+{
+#ifdef CONFIG_PPC64
+	return hose->pci_io_size;
+#else
+	return hose->io_resource.end - hose->io_resource.start + 1;
+#endif
+}
+
 int pcibios_vaddr_is_ioport(void __iomem *address)
 {
 	int ret = 0;
 	struct pci_controller *hose;
-	unsigned long size;
+	resource_size_t size;
 
 	spin_lock(&hose_spinlock);
 	list_for_each_entry(hose, &hose_list, list_node) {
-#ifdef CONFIG_PPC64
-		size = hose->pci_io_size;
-#else
-		size = hose->io_resource.end - hose->io_resource.start + 1;
-#endif
+		size = pcibios_io_size(hose);
 		if (address >= hose->io_base_virt &&
 		    address < (hose->io_base_virt + size)) {
 			ret = 1;
@@ -136,6 +142,29 @@ int pcibios_vaddr_is_ioport(void __iomem *address)
 	return ret;
 }
 
+unsigned long pci_address_to_pio(phys_addr_t address)
+{
+	struct pci_controller *hose;
+	resource_size_t size;
+	unsigned long ret = ~0;
+
+	spin_lock(&hose_spinlock);
+	list_for_each_entry(hose, &hose_list, list_node) {
+		size = pcibios_io_size(hose);
+		if (address >= hose->io_base_phys &&
+		    address < (hose->io_base_phys + size)) {
+			unsigned long base =
+				(unsigned long)hose->io_base_virt - _IO_BASE;
+			ret = base + (address - hose->io_base_phys);
+			break;
+		}
+	}
+	spin_unlock(&hose_spinlock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pci_address_to_pio);
+
 /*
  * Return the domain number for this bus.
  */
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index 132cd80afa21..c6368506455f 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -20,6 +20,7 @@
 #include <asm/prom.h>
 #include <asm/sections.h>
 #include <asm/pci-bridge.h>
+#include <asm/ppc-pci.h>
 #include <asm/byteorder.h>
 #include <asm/uaccess.h>
 #include <asm/machdep.h>
@@ -43,8 +44,6 @@ static u8* pci_to_OF_bus_map;
  */
 static int pci_assign_all_buses;
 
-LIST_HEAD(hose_list);
-
 static int pci_bus_count;
 
 /* This will remain NULL for now, until isa-bridge.c is made common
@@ -491,24 +490,6 @@ long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
 	return result;
 }
 
-unsigned long pci_address_to_pio(phys_addr_t address)
-{
-	struct pci_controller *hose, *tmp;
-
-	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
-		unsigned int size = hose->io_resource.end -
-			hose->io_resource.start + 1;
-		if (address >= hose->io_base_phys &&
-		    address < (hose->io_base_phys + size)) {
-			unsigned long base =
-				(unsigned long)hose->io_base_virt - _IO_BASE;
-			return base + (address - hose->io_base_phys);
-		}
-	}
-	return (unsigned int)-1;
-}
-EXPORT_SYMBOL(pci_address_to_pio);
-
 /*
  * Null PCI config access functions, for the case when we can't
  * find a hose.
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index ea8eda8c87cf..be574fc0d92f 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -43,8 +43,6 @@ unsigned long pci_probe_only = 1;
 unsigned long pci_io_base = ISA_IO_BASE;
 EXPORT_SYMBOL(pci_io_base);
 
-LIST_HEAD(hose_list);
-
 static void fixup_broken_pcnet32(struct pci_dev* dev)
 {
 	if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
@@ -524,23 +522,6 @@ int __devinit pcibios_map_io_space(struct pci_bus *bus)
 }
 EXPORT_SYMBOL_GPL(pcibios_map_io_space);
 
-unsigned long pci_address_to_pio(phys_addr_t address)
-{
-	struct pci_controller *hose, *tmp;
-
-	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
-		if (address >= hose->io_base_phys &&
-		    address < (hose->io_base_phys + hose->pci_io_size)) {
-			unsigned long base =
-				(unsigned long)hose->io_base_virt - _IO_BASE;
-			return base + (address - hose->io_base_phys);
-		}
-	}
-	return (unsigned int)-1;
-}
-EXPORT_SYMBOL_GPL(pci_address_to_pio);
-
-
 #define IOBASE_BRIDGE_NUMBER	0
 #define IOBASE_MEMORY		1
 #define IOBASE_IO		2
-- 
cgit v1.2.2


From d66c82ea456853a71d88359b0c19a92ac1d393ff Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Tue, 10 Feb 2009 18:10:50 -0600
Subject: powerpc/fsl-booke: Add new ISA 2.06 page sizes and MAS defines

The Power ISA 2.06 added power of two page sizes to the embedded MMU
architecture.  Its done it such a way to be code compatiable with the
existing HW.  Made the minor code changes to support both power of two
and power of four page sizes.  Also added some new MAS bits and macros
that are defined as part of the 2.06 ISA.  Renamed some things to use
the 'Book-3e' concept to convey the new MMU that is based on the
Freescale Book-E MMU programming model.

Note, its still invalid to try and use a page size that isn't supported
by cpu.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 arch/powerpc/kernel/head_fsl_booke.S | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 64ecb1603a77..4ea6e1a7e4b9 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -173,7 +173,7 @@ skpinv:	addi	r6,r6,1				/* Increment */
 
 	/* grab and fixup the RPN */
 	mfspr	r6,SPRN_MAS1	/* extract MAS1[SIZE] */
-	rlwinm	r6,r6,25,27,30
+	rlwinm	r6,r6,25,27,31
 	li	r8,-1
 	addi	r6,r6,10
 	slw	r6,r8,r6	/* convert to mask */
@@ -199,7 +199,7 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	xori	r6,r4,1		/* Setup TMP mapping in the other Address space */
 	slwi	r6,r6,12
 	oris	r6,r6,(MAS1_VALID|MAS1_IPROT)@h
-	ori	r6,r6,(MAS1_TSIZE(BOOKE_PAGESZ_4K))@l
+	ori	r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_4K))@l
 	mtspr	SPRN_MAS1,r6
 	mfspr	r6,SPRN_MAS2
 	li	r7,0		/* temp EPN = 0 */
@@ -257,10 +257,10 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	lis	r6,0x1000		/* Set MAS0(TLBSEL) = TLB1(1), ESEL = 0 */
 	mtspr	SPRN_MAS0,r6
 	lis	r6,(MAS1_VALID|MAS1_IPROT)@h
-	ori	r6,r6,(MAS1_TSIZE(BOOKE_PAGESZ_64M))@l
+	ori	r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_64M))@l
 	mtspr	SPRN_MAS1,r6
-	lis	r6,MAS2_VAL(PAGE_OFFSET, BOOKE_PAGESZ_64M, M_IF_SMP)@h
-	ori	r6,r6,MAS2_VAL(PAGE_OFFSET, BOOKE_PAGESZ_64M, M_IF_SMP)@l
+	lis	r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@h
+	ori	r6,r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@l
 	mtspr	SPRN_MAS2,r6
 	mtspr	SPRN_MAS3,r8
 	tlbwe
@@ -315,7 +315,7 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	mtspr	SPRN_IVPR,r4
 
 	/* Setup the defaults for TLB entries */
-	li	r2,(MAS4_TSIZED(BOOKE_PAGESZ_4K))@l
+	li	r2,(MAS4_TSIZED(BOOK3E_PAGESZ_4K))@l
 #ifdef CONFIG_E200
 	oris	r2,r2,MAS4_TLBSELD(1)@h
 #endif
@@ -1116,7 +1116,7 @@ __secondary_start:
 	mtspr	SPRN_SPRG3,r4
 
 	/* Setup the defaults for TLB entries */
-	li	r4,(MAS4_TSIZED(BOOKE_PAGESZ_4K))@l
+	li	r4,(MAS4_TSIZED(BOOK3E_PAGESZ_4K))@l
 	mtspr	SPRN_MAS4,r4
 
 	/* Jump to start_secondary */
-- 
cgit v1.2.2


From 70fe3af8403f85196bb74f22ce4813db7dfedc1a Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 12 Feb 2009 16:12:40 -0600
Subject: powerpc/book-3e: Introduce concept of Book-3e MMU

The Power ISA 2.06 spec introduces a standard MMU programming model that
is based on the Freescale Book-E MMU programing model.  The Freescale
version is pretty backwards compatiable with the ISA 2.06 definition so
we are starting to refactor some of the Freescale code so it can be
easily shared.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 arch/powerpc/kernel/entry_32.S | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 6f7eb7e00c79..301c646d1a7d 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -63,7 +63,7 @@ debug_transfer_to_handler:
 
 	.globl	crit_transfer_to_handler
 crit_transfer_to_handler:
-#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_PPC_BOOK3E_MMU
 	mfspr	r0,SPRN_MAS0
 	stw	r0,MAS0(r11)
 	mfspr	r0,SPRN_MAS1
@@ -78,7 +78,7 @@ crit_transfer_to_handler:
 	mfspr	r0,SPRN_MAS7
 	stw	r0,MAS7(r11)
 #endif /* CONFIG_PHYS_64BIT */
-#endif /* CONFIG_FSL_BOOKE */
+#endif /* CONFIG_PPC_BOOK3E_MMU */
 #ifdef CONFIG_44x
 	mfspr	r0,SPRN_MMUCR
 	stw	r0,MMUCR(r11)
@@ -914,7 +914,7 @@ exc_exit_restart_end:
 	mtspr	SPRN_##exc_lvl_srr0,r9;					\
 	mtspr	SPRN_##exc_lvl_srr1,r10;
 
-#if defined(CONFIG_FSL_BOOKE)
+#if defined(CONFIG_PPC_BOOK3E_MMU)
 #ifdef CONFIG_PHYS_64BIT
 #define	RESTORE_MAS7							\
 	lwz	r11,MAS7(r1);						\
-- 
cgit v1.2.2


From e12401222f749c37277a313d631dc024bbfd3b00 Mon Sep 17 00:00:00 2001
From: Yuri Tikhonov <yur@emcraft.com>
Date: Thu, 29 Jan 2009 01:40:44 +0000
Subject: powerpc/44x: Support for 256KB PAGE_SIZE

This patch adds support for 256KB pages on ppc44x-based boards.

For simplification of implementation with 256KB pages we still assume
2-level paging. As a side effect this leads to wasting extra memory space
reserved for PTE tables: only 1/4 of pages allocated for PTEs are
actually used. But this may be an acceptable trade-off to achieve the
high performance we have with big PAGE_SIZEs in some applications (e.g.
RAID).

Also with 256KB PAGE_SIZE we increase THREAD_SIZE up to 32KB to minimize
the risk of stack overflows in the cases of on-stack arrays, which size
depends on the page size (e.g. multipage BIOs, NTFS, etc.).

With 256KB PAGE_SIZE we need to decrease the PKMAP_ORDER at least down
to 9, otherwise all high memory (2 ^ 10 * PAGE_SIZE == 256MB) we'll be
occupied by PKMAP addresses leaving no place for vmalloc. We do not
separate PKMAP_ORDER for 256K from 16K/64K PAGE_SIZE here; actually that
value of 10 in support for 16K/64K had been selected rather intuitively.
Thus now for all cases of PAGE_SIZE on ppc44x (including the default, 4KB,
one) we have 512 pages for PKMAP.

Because ELF standard supports only page sizes up to 64K, then you should
use binutils later than 2.17.50.0.3 with '-zmax-page-size' set to 256K
for building applications, which are to be run with the 256KB-page sized
kernel. If using the older binutils, then you should patch them like follows:

	--- binutils/bfd/elf32-ppc.c.orig
	+++ binutils/bfd/elf32-ppc.c

	-#define ELF_MAXPAGESIZE                0x10000
	+#define ELF_MAXPAGESIZE                0x40000

One more restriction we currently have with 256KB page sizes is inability
to use shmem safely, so, for now, the 256KB is available only if you turn
the CONFIG_SHMEM option off (another variant is to use BROKEN).
Though, if you need shmem with 256KB pages, you can always remove the !SHMEM
dependency in 'config PPC_256K_PAGES', and use the workaround available here:
 http://lkml.org/lkml/2008/12/19/20

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/head_booke.h | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index bec18078239d..69a4489bc86a 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -10,6 +10,15 @@
 		mtspr	SPRN_IVOR##vector_number,r26;	\
 		sync
 
+#if (THREAD_SHIFT < 15)
+#define ALLOC_STACK_FRAME(reg, val)			\
+	addi reg,reg,val
+#else
+#define ALLOC_STACK_FRAME(reg, val)			\
+	addis	reg,reg,val@ha;				\
+	addi	reg,reg,val@l
+#endif
+
 #define NORMAL_EXCEPTION_PROLOG						     \
 	mtspr	SPRN_SPRG0,r10;		/* save two registers to work with */\
 	mtspr	SPRN_SPRG1,r11;						     \
@@ -20,7 +29,7 @@
 	beq	1f;							     \
 	mfspr	r1,SPRN_SPRG3;		/* if from user, start at top of   */\
 	lwz	r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack   */\
-	addi	r1,r1,THREAD_SIZE;					     \
+	ALLOC_STACK_FRAME(r1, THREAD_SIZE);				     \
 1:	subi	r1,r1,INT_FRAME_SIZE;	/* Allocate an exception frame     */\
 	mr	r11,r1;							     \
 	stw	r10,_CCR(r11);          /* save various registers	   */\
-- 
cgit v1.2.2


From 6c7120902305b3a21460cd2f0f917a39307df566 Mon Sep 17 00:00:00 2001
From: Madhulika Madishetty <mmadishetty@amcc.com>
Date: Thu, 5 Feb 2009 13:31:36 +0000
Subject: AMCC PPC 460SX redwood SoC platform initial framework

This patch contains initial framework for the AMCC Redwood board.

Signed-off-by: Madhulika Madishetty <mmadishetty@amcc.com>
Signed-off-by: Tirumala Marri <tmarri@amcc.com>
Signed-off-by: Feng Kan <fkan@amcc.com>
Signed-off-by: Vidhyananth Venkatasamy <vvenkatasamy@amcc.com>
Signed-off-by: Preetesh Parekh <pparekh@amcc.com>
Acked-by: Loc Ho <lho@amcc.com>
Acked-by: Feng Kan <fkan@amcc.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/cpu_setup_44x.S |  1 +
 arch/powerpc/kernel/cputable.c      | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cpu_setup_44x.S b/arch/powerpc/kernel/cpu_setup_44x.S
index 10b4ab1008af..7d606f89a839 100644
--- a/arch/powerpc/kernel/cpu_setup_44x.S
+++ b/arch/powerpc/kernel/cpu_setup_44x.S
@@ -34,6 +34,7 @@ _GLOBAL(__setup_cpu_440grx)
 	blr
 _GLOBAL(__setup_cpu_460ex)
 _GLOBAL(__setup_cpu_460gt)
+_GLOBAL(__setup_cpu_460sx)
 	mflr	r4
 	bl	__init_fpu_44x
 	bl	__fixup_440A_mcheck
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 9fdf1b8027b5..f59ca710f448 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -47,6 +47,7 @@ extern void __setup_cpu_440spe(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440x5(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_460ex(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_460gt(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_460sx(unsigned long offset, struct cpu_spec *spec);
 extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec);
@@ -1638,6 +1639,19 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.machine_check		= machine_check_440A,
 		.platform		= "ppc440",
 	},
+	{ /* 460SX */
+		.pvr_mask		= 0xffffff00,
+		.pvr_value		= 0x13541800,
+		.cpu_name		= "460SX",
+		.cpu_features		= CPU_FTRS_44X,
+		.cpu_user_features	= COMMON_USER_BOOKE,
+		.mmu_features		= MMU_FTR_TYPE_44x,
+		.icache_bsize		= 32,
+		.dcache_bsize		= 32,
+		.cpu_setup		= __setup_cpu_460sx,
+		.machine_check		= machine_check_440A,
+		.platform		= "ppc440",
+	},
 	{	/* default match */
 		.pvr_mask		= 0x00000000,
 		.pvr_value		= 0x00000000,
-- 
cgit v1.2.2


From 44e1d064b919cb3a56ef67e0f7e244927be8369a Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Wed, 4 Feb 2009 18:29:03 -0800
Subject: ftrace, powerpc: replace debug macro with proper pr_deug

Impact: cleanup

The PowerPC ftrace code uses a hacked up DEBUGP macro for prints.
This patch converts it to the standard pr_debug.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/ftrace.c | 26 ++++++++++----------------
 1 file changed, 10 insertions(+), 16 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 60c60ccf5e3c..77a7d186db1c 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -20,12 +20,6 @@
 #include <asm/code-patching.h>
 #include <asm/ftrace.h>
 
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt , ...)	do { } while (0)
-#endif
-
 static unsigned int ftrace_nop = PPC_NOP_INSTR;
 
 #ifdef CONFIG_PPC32
@@ -175,7 +169,7 @@ __ftrace_make_nop(struct module *mod,
 	 * 0xe8, 0x4c, 0x00, 0x28,    ld      r2,40(r12)
 	 */
 
-	DEBUGP("ip:%lx jumps to %lx r2: %lx", ip, tramp, mod->arch.toc);
+	pr_debug("ip:%lx jumps to %lx r2: %lx", ip, tramp, mod->arch.toc);
 
 	/* Find where the trampoline jumps to */
 	if (probe_kernel_read(jmp, (void *)tramp, sizeof(jmp))) {
@@ -183,7 +177,7 @@ __ftrace_make_nop(struct module *mod,
 		return -EFAULT;
 	}
 
-	DEBUGP(" %08x %08x", jmp[0], jmp[1]);
+	pr_debug(" %08x %08x", jmp[0], jmp[1]);
 
 	/* verify that this is what we expect it to be */
 	if (((jmp[0] & 0xffff0000) != 0x3d820000) ||
@@ -199,18 +193,18 @@ __ftrace_make_nop(struct module *mod,
 	offset = ((unsigned)((unsigned short)jmp[0]) << 16) +
 		(int)((short)jmp[1]);
 
-	DEBUGP(" %x ", offset);
+	pr_debug(" %x ", offset);
 
 	/* get the address this jumps too */
 	tramp = mod->arch.toc + offset + 32;
-	DEBUGP("toc: %lx", tramp);
+	pr_debug("toc: %lx", tramp);
 
 	if (probe_kernel_read(jmp, (void *)tramp, 8)) {
 		printk(KERN_ERR "Failed to read %lx\n", tramp);
 		return -EFAULT;
 	}
 
-	DEBUGP(" %08x %08x\n", jmp[0], jmp[1]);
+	pr_debug(" %08x %08x\n", jmp[0], jmp[1]);
 
 	ptr = ((unsigned long)jmp[0] << 32) + jmp[1];
 
@@ -287,7 +281,7 @@ __ftrace_make_nop(struct module *mod,
 	 *  0x4e, 0x80, 0x04, 0x20  bctr
 	 */
 
-	DEBUGP("ip:%lx jumps to %lx", ip, tramp);
+	pr_debug("ip:%lx jumps to %lx", ip, tramp);
 
 	/* Find where the trampoline jumps to */
 	if (probe_kernel_read(jmp, (void *)tramp, sizeof(jmp))) {
@@ -295,7 +289,7 @@ __ftrace_make_nop(struct module *mod,
 		return -EFAULT;
 	}
 
-	DEBUGP(" %08x %08x ", jmp[0], jmp[1]);
+	pr_debug(" %08x %08x ", jmp[0], jmp[1]);
 
 	/* verify that this is what we expect it to be */
 	if (((jmp[0] & 0xffff0000) != 0x3d600000) ||
@@ -311,7 +305,7 @@ __ftrace_make_nop(struct module *mod,
 	if (tramp & 0x8000)
 		tramp -= 0x10000;
 
-	DEBUGP(" %x ", tramp);
+	pr_debug(" %x ", tramp);
 
 	if (tramp != addr) {
 		printk(KERN_ERR
@@ -414,7 +408,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 	/* ld r2,40(r1) */
 	op[1] = 0xe8410028;
 
-	DEBUGP("write to %lx\n", rec->ip);
+	pr_debug("write to %lx\n", rec->ip);
 
 	if (probe_kernel_write((void *)ip, op, MCOUNT_INSN_SIZE * 2))
 		return -EPERM;
@@ -454,7 +448,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 		return -EINVAL;
 	}
 
-	DEBUGP("write to %lx\n", rec->ip);
+	pr_debug("write to %lx\n", rec->ip);
 
 	if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
 		return -EPERM;
-- 
cgit v1.2.2


From 17be5b3ddf71d980f67fc826e49b00cd2afd724d Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Thu, 5 Feb 2009 21:33:09 -0800
Subject: powerpc, ftrace: fix compile error when modules not configured

Michael Neuling reported a compile bug when dynamic ftrace was
configured in and modules were not. This was due to the ftrace
code referencing module specific structures.

Reported-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/ftrace.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 77a7d186db1c..4112175183d3 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -113,6 +113,8 @@ static int test_24bit_addr(unsigned long ip, unsigned long addr)
 	return create_branch((unsigned int *)ip, addr, 0);
 }
 
+#ifdef CONFIG_MODULES
+
 static int is_bl_op(unsigned int op)
 {
 	return (op & 0xfc000003) == 0x48000001;
@@ -324,6 +326,7 @@ __ftrace_make_nop(struct module *mod,
 	return 0;
 }
 #endif /* PPC64 */
+#endif /* CONFIG_MODULES */
 
 int ftrace_make_nop(struct module *mod,
 		    struct dyn_ftrace *rec, unsigned long addr)
@@ -343,6 +346,7 @@ int ftrace_make_nop(struct module *mod,
 		return ftrace_modify_code(ip, old, new);
 	}
 
+#ifdef CONFIG_MODULES
 	/*
 	 * Out of range jumps are called from modules.
 	 * We should either already have a pointer to the module
@@ -367,9 +371,13 @@ int ftrace_make_nop(struct module *mod,
 		mod = rec->arch.mod;
 
 	return __ftrace_make_nop(mod, rec, addr);
-
+#else
+	/* We should not get here without modules */
+	return -EINVAL;
+#endif /* CONFIG_MODULES */
 }
 
+#ifdef CONFIG_MODULES
 #ifdef CONFIG_PPC64
 static int
 __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
@@ -458,6 +466,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 	return 0;
 }
 #endif /* CONFIG_PPC64 */
+#endif /* CONFIG_MODULES */
 
 int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 {
@@ -476,6 +485,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 		return ftrace_modify_code(ip, old, new);
 	}
 
+#ifdef CONFIG_MODULES
 	/*
 	 * Out of range jumps are called from modules.
 	 * Being that we are converting from nop, it had better
@@ -487,6 +497,10 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 	}
 
 	return __ftrace_make_call(rec, addr);
+#else
+	/* We should not get here without modules */
+	return -EINVAL;
+#endif /* CONFIG_MODULES */
 }
 
 int ftrace_update_ftrace_func(ftrace_func_t func)
-- 
cgit v1.2.2


From 6794c78243bfda020ab184d6d578944f8e90d26c Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Mon, 9 Feb 2009 21:10:27 -0800
Subject: powerpc64: port of the function graph tracer

This is a port of the function graph tracer that was written by
Frederic Weisbecker for the x86.

This only works for PPC64 at the moment and only for static tracing.
PPC32 and dynamic function graph tracing support will come later.

The trace produces a visual calling of functions:

 # tracer: function_graph
 #
 # CPU  DURATION                  FUNCTION CALLS
 # |     |   |                     |   |   |   |
  0)   2.224 us    |                        }
  0) ! 271.024 us  |                      }
  0) ! 320.080 us  |                    }
  0) ! 324.656 us  |                  }
  0) ! 329.136 us  |                }
  0)               |                .put_prev_task_fair() {
  0)               |                  .update_curr() {
  0)   2.240 us    |                    .update_min_vruntime();
  0)   6.512 us    |                  }
  0)   2.528 us    |                  .__enqueue_entity();
  0) + 15.536 us   |                }
  0)               |                .pick_next_task_fair() {
  0)   2.032 us    |                  .__pick_next_entity();
  0)   2.064 us    |                  .__clear_buddies();
  0)               |                  .set_next_entity() {
  0)   2.672 us    |                    .__dequeue_entity();
  0)   6.864 us    |                  }

Geoff Lavand tested on PS3.

Tested-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/Makefile      |  9 ++---
 arch/powerpc/kernel/entry_64.S    | 58 ++++++++++++++++++++++++++--
 arch/powerpc/kernel/ftrace.c      | 79 ++++++++++++++++++++++++++++++++++++++-
 arch/powerpc/kernel/process.c     | 16 ++++++++
 arch/powerpc/kernel/vmlinux.lds.S |  1 +
 5 files changed, 153 insertions(+), 10 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index d15992119085..583ba6493a62 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -18,12 +18,10 @@ CFLAGS_REMOVE_cputable.o = -pg -mno-sched-epilog
 CFLAGS_REMOVE_prom_init.o = -pg -mno-sched-epilog
 CFLAGS_REMOVE_btext.o = -pg -mno-sched-epilog
 CFLAGS_REMOVE_prom.o = -pg -mno-sched-epilog
-
-ifdef CONFIG_DYNAMIC_FTRACE
-# dynamic ftrace setup.
+# do not trace tracer code
 CFLAGS_REMOVE_ftrace.o = -pg -mno-sched-epilog
-endif
-
+# timers used by tracing
+CFLAGS_REMOVE_time.o = -pg -mno-sched-epilog
 endif
 
 obj-y				:= cputable.o ptrace.o syscalls.o \
@@ -95,6 +93,7 @@ obj-$(CONFIG_AUDIT)		+= audit.o
 obj64-$(CONFIG_AUDIT)		+= compat_audit.o
 
 obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o
+obj-$(CONFIG_FUNCTION_GRAPH_TRACER)	+= ftrace.o
 
 obj-$(CONFIG_8XX_MINIMAL_FPEMU) += softemu8xx.o
 
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 383ed6eb0085..a32699e74c3c 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -931,13 +931,65 @@ _GLOBAL(_mcount)
 	ld	r5,0(r5)
 	mtctr	r5
 	bctrl
-
 	nop
+
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+	b	ftrace_graph_caller
+#endif
 	ld	r0, 128(r1)
 	mtlr	r0
 	addi	r1, r1, 112
 _GLOBAL(ftrace_stub)
 	blr
 
-#endif
-#endif
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ftrace_graph_caller:
+	/* load r4 with local address */
+	ld	r4, 128(r1)
+	subi	r4, r4, MCOUNT_INSN_SIZE
+
+	/* get the parent address */
+	ld	r11, 112(r1)
+	addi	r3, r11, 16
+
+	bl	.prepare_ftrace_return
+	nop
+
+	ld	r0, 128(r1)
+	mtlr	r0
+	addi	r1, r1, 112
+	blr
+
+_GLOBAL(return_to_handler)
+	/* need to save return values */
+	std	r4,  -32(r1)
+	std	r3,  -24(r1)
+	/* save TOC */
+	std	r2,  -16(r1)
+	std	r31, -8(r1)
+	mr	r31, r1
+	stdu	r1, -112(r1)
+
+	/* update the TOC */
+	LOAD_REG_IMMEDIATE(r4,ftrace_return_to_handler)
+	ld	r2, 8(r4)
+
+	bl	.ftrace_return_to_handler
+	nop
+
+	/* return value has real return address */
+	mtlr	r3
+
+	ld	r1, 0(r1)
+	ld	r4,  -32(r1)
+	ld	r3,  -24(r1)
+	ld	r2,  -16(r1)
+	ld	r31, -8(r1)
+
+	/* Jump back to real return address */
+	blr
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+#endif /* CONFIG_FUNCTION_TRACER */
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 4112175183d3..c9b1547f65a5 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -5,6 +5,9 @@
  *
  * Thanks goes out to P.A. Semi, Inc for supplying me with a PPC64 box.
  *
+ * Added function graph tracer code, taken from x86 that was written
+ * by Frederic Weisbecker, and ported to PPC by Steven Rostedt.
+ *
  */
 
 #include <linux/spinlock.h>
@@ -20,8 +23,6 @@
 #include <asm/code-patching.h>
 #include <asm/ftrace.h>
 
-static unsigned int ftrace_nop = PPC_NOP_INSTR;
-
 #ifdef CONFIG_PPC32
 # define GET_ADDR(addr) addr
 #else
@@ -29,6 +30,8 @@ static unsigned int ftrace_nop = PPC_NOP_INSTR;
 # define GET_ADDR(addr) (*(unsigned long *)addr)
 #endif
 
+#ifdef CONFIG_DYNAMIC_FTRACE
+static unsigned int ftrace_nop = PPC_NOP_INSTR;
 
 static unsigned int ftrace_calc_offset(long ip, long addr)
 {
@@ -525,3 +528,75 @@ int __init ftrace_dyn_arch_init(void *data)
 
 	return 0;
 }
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+
+/*
+ * Hook the return address and push it in the stack of return addrs
+ * in current thread info.
+ */
+void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
+{
+	unsigned long old;
+	unsigned long long calltime;
+	int faulted;
+	struct ftrace_graph_ent trace;
+	unsigned long return_hooker = (unsigned long)
+				&return_to_handler;
+
+	if (unlikely(atomic_read(&current->tracing_graph_pause)))
+		return;
+
+	return_hooker = GET_ADDR(return_hooker);
+
+	/*
+	 * Protect against fault, even if it shouldn't
+	 * happen. This tool is too much intrusive to
+	 * ignore such a protection.
+	 */
+	asm volatile(
+		"1: " PPC_LL "%[old], 0(%[parent])\n"
+		"2: " PPC_STL "%[return_hooker], 0(%[parent])\n"
+		"   li %[faulted], 0\n"
+		"3:"
+
+		".section .fixup, \"ax\"\n"
+		"4: li %[faulted], 1\n"
+		"   b 3b\n"
+		".previous\n"
+
+		".section __ex_table,\"a\"\n"
+			PPC_LONG_ALIGN "\n"
+			PPC_LONG "1b,4b\n"
+			PPC_LONG "2b,4b\n"
+		".previous"
+
+		: [old] "=r" (old), [faulted] "=r" (faulted)
+		: [parent] "r" (parent), [return_hooker] "r" (return_hooker)
+		: "memory"
+	);
+
+	if (unlikely(faulted)) {
+		ftrace_graph_stop();
+		WARN_ON(1);
+		return;
+	}
+
+	calltime = cpu_clock(raw_smp_processor_id());
+
+	if (ftrace_push_return_trace(old, calltime,
+				self_addr, &trace.depth) == -EBUSY) {
+		*parent = old;
+		return;
+	}
+
+	trace.func = self_addr;
+
+	/* Only trace if the calling function expects to */
+	if (!ftrace_graph_entry(&trace)) {
+		current->curr_ret_stack--;
+		*parent = old;
+	}
+}
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index fb7049c054c0..8ede428e76c0 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -33,6 +33,7 @@
 #include <linux/mqueue.h>
 #include <linux/hardirq.h>
 #include <linux/utsname.h>
+#include <linux/ftrace.h>
 #include <linux/kernel_stat.h>
 
 #include <asm/pgtable.h>
@@ -1008,6 +1009,14 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
 	unsigned long sp, ip, lr, newsp;
 	int count = 0;
 	int firstframe = 1;
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+	int curr_frame = current->curr_ret_stack;
+	extern void return_to_handler(void);
+	unsigned long addr = (unsigned long)return_to_handler;
+#ifdef CONFIG_PPC64
+	addr = *(unsigned long*)addr;
+#endif
+#endif
 
 	sp = (unsigned long) stack;
 	if (tsk == NULL)
@@ -1030,6 +1039,13 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
 		ip = stack[STACK_FRAME_LR_SAVE];
 		if (!firstframe || ip != lr) {
 			printk("["REG"] ["REG"] %pS", sp, ip, (void *)ip);
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+			if (ip == addr && curr_frame >= 0) {
+				printk(" (%pS)",
+				       (void *)current->ret_stack[curr_frame].ret);
+				curr_frame--;
+			}
+#endif
 			if (firstframe)
 				printk(" (unreliable)");
 			printk("\n");
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 161b9b9691f0..895af44bf1f4 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -58,6 +58,7 @@ SECTIONS
 		SCHED_TEXT
 		LOCK_TEXT
 		KPROBES_TEXT
+		IRQENTRY_TEXT
 
 #ifdef CONFIG_PPC32
 		*(.got1)
-- 
cgit v1.2.2


From 465428884765b43d642a967915e16c6c7cacbe8e Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Tue, 10 Feb 2009 22:19:54 -0800
Subject: powerpc64, tracing: add function graph tracer with dynamic tracing

This is the port of the function graph tracer to PowerPC with
dynamic tracing.

Geoff Lavand tested on PS3.

Tested-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/entry_64.S |  8 ++++++-
 arch/powerpc/kernel/ftrace.c   | 47 ++++++++++++++++++++++++++++++++++++------
 2 files changed, 48 insertions(+), 7 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index a32699e74c3c..9f61fd61f277 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -908,6 +908,12 @@ _GLOBAL(ftrace_caller)
 ftrace_call:
 	bl	ftrace_stub
 	nop
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+.globl ftrace_graph_call
+ftrace_graph_call:
+	b	ftrace_graph_stub
+_GLOBAL(ftrace_graph_stub)
+#endif
 	ld	r0, 128(r1)
 	mtlr	r0
 	addi	r1, r1, 112
@@ -946,7 +952,7 @@ _GLOBAL(ftrace_stub)
 #endif /* CONFIG_DYNAMIC_FTRACE */
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
-ftrace_graph_caller:
+_GLOBAL(ftrace_graph_caller)
 	/* load r4 with local address */
 	ld	r4, 128(r1)
 	subi	r4, r4, MCOUNT_INSN_SIZE
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index c9b1547f65a5..7538b944fa52 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -43,7 +43,8 @@ static unsigned char *ftrace_nop_replace(void)
 	return (char *)&ftrace_nop;
 }
 
-static unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr)
+static unsigned char *
+ftrace_call_replace(unsigned long ip, unsigned long addr, int link)
 {
 	static unsigned int op;
 
@@ -55,8 +56,9 @@ static unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr)
 	 */
 	addr = GET_ADDR(addr);
 
-	/* Set to "bl addr" */
-	op = 0x48000001 | (ftrace_calc_offset(ip, addr) & 0x03fffffc);
+	/* if (link) set op to 'bl' else 'b' */
+	op = 0x48000000 | (link ? 1 : 0);
+	op |= (ftrace_calc_offset(ip, addr) & 0x03fffffc);
 
 	/*
 	 * No locking needed, this must be called via kstop_machine
@@ -344,7 +346,7 @@ int ftrace_make_nop(struct module *mod,
 	 */
 	if (test_24bit_addr(ip, addr)) {
 		/* within range */
-		old = ftrace_call_replace(ip, addr);
+		old = ftrace_call_replace(ip, addr, 1);
 		new = ftrace_nop_replace();
 		return ftrace_modify_code(ip, old, new);
 	}
@@ -484,7 +486,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 	if (test_24bit_addr(ip, addr)) {
 		/* within range */
 		old = ftrace_nop_replace();
-		new = ftrace_call_replace(ip, addr);
+		new = ftrace_call_replace(ip, addr, 1);
 		return ftrace_modify_code(ip, old, new);
 	}
 
@@ -513,7 +515,7 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
 	int ret;
 
 	memcpy(old, &ftrace_call, MCOUNT_INSN_SIZE);
-	new = ftrace_call_replace(ip, (unsigned long)func);
+	new = ftrace_call_replace(ip, (unsigned long)func, 1);
 	ret = ftrace_modify_code(ip, old, new);
 
 	return ret;
@@ -532,6 +534,39 @@ int __init ftrace_dyn_arch_init(void *data)
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 
+#ifdef CONFIG_DYNAMIC_FTRACE
+extern void ftrace_graph_call(void);
+extern void ftrace_graph_stub(void);
+
+int ftrace_enable_ftrace_graph_caller(void)
+{
+	unsigned long ip = (unsigned long)(&ftrace_graph_call);
+	unsigned long addr = (unsigned long)(&ftrace_graph_caller);
+	unsigned long stub = (unsigned long)(&ftrace_graph_stub);
+	unsigned char old[MCOUNT_INSN_SIZE], *new;
+
+	new = ftrace_call_replace(ip, stub, 0);
+	memcpy(old, new, MCOUNT_INSN_SIZE);
+	new = ftrace_call_replace(ip, addr, 0);
+
+	return ftrace_modify_code(ip, old, new);
+}
+
+int ftrace_disable_ftrace_graph_caller(void)
+{
+	unsigned long ip = (unsigned long)(&ftrace_graph_call);
+	unsigned long addr = (unsigned long)(&ftrace_graph_caller);
+	unsigned long stub = (unsigned long)(&ftrace_graph_stub);
+	unsigned char old[MCOUNT_INSN_SIZE], *new;
+
+	new = ftrace_call_replace(ip, addr, 0);
+	memcpy(old, new, MCOUNT_INSN_SIZE);
+	new = ftrace_call_replace(ip, stub, 0);
+
+	return ftrace_modify_code(ip, old, new);
+}
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
 /*
  * Hook the return address and push it in the stack of return addrs
  * in current thread info.
-- 
cgit v1.2.2


From bb7253403f7a4670a128e4c080fd8ea1bd4d5029 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Wed, 11 Feb 2009 12:45:49 -0800
Subject: powerpc64, ftrace: save toc only on modules for function graph

The TOCS used by modules are different than the one used by
the core kernel code. The function graph tracer must save and
restore the TOC whenever it traces a module call. But this
is an added overhead to burden the majority of core kernel
code being traced.

Benjamin Herrenschmidt suggested in testing the entry of
the call to tell if it is a core kernel function or a module.
He recommended using the REGION_ID() macro to perform this test.

This patch implements Benjamin's idea, and uses a different
return_to_handler routine dependent on if the entry is a core
kernel function or not. The module version saves the TOC, where as
the core kernel version does not.

Geoff Lavand tested on PS3.

Tested-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/entry_64.S | 27 ++++++++++++++++++++++++++-
 arch/powerpc/kernel/ftrace.c   | 13 +++++++++++--
 2 files changed, 37 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 9f61fd61f277..abfc32330479 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -970,6 +970,28 @@ _GLOBAL(ftrace_graph_caller)
 	blr
 
 _GLOBAL(return_to_handler)
+	/* need to save return values */
+	std	r4,  -24(r1)
+	std	r3,  -16(r1)
+	std	r31, -8(r1)
+	mr	r31, r1
+	stdu	r1, -112(r1)
+
+	bl	.ftrace_return_to_handler
+	nop
+
+	/* return value has real return address */
+	mtlr	r3
+
+	ld	r1, 0(r1)
+	ld	r4,  -24(r1)
+	ld	r3,  -16(r1)
+	ld	r31, -8(r1)
+
+	/* Jump back to real return address */
+	blr
+
+_GLOBAL(mod_return_to_handler)
 	/* need to save return values */
 	std	r4,  -32(r1)
 	std	r3,  -24(r1)
@@ -979,7 +1001,10 @@ _GLOBAL(return_to_handler)
 	mr	r31, r1
 	stdu	r1, -112(r1)
 
-	/* update the TOC */
+	/*
+	 * We are in a module using the module's TOC.
+	 * Switch to our TOC to run inside the core kernel.
+	 */
 	LOAD_REG_IMMEDIATE(r4,ftrace_return_to_handler)
 	ld	r2, 8(r4)
 
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 7538b944fa52..5c6dfa97e838 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -567,6 +567,10 @@ int ftrace_disable_ftrace_graph_caller(void)
 }
 #endif /* CONFIG_DYNAMIC_FTRACE */
 
+#ifdef CONFIG_PPC64
+extern void mod_return_to_handler(void);
+#endif
+
 /*
  * Hook the return address and push it in the stack of return addrs
  * in current thread info.
@@ -577,12 +581,17 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
 	unsigned long long calltime;
 	int faulted;
 	struct ftrace_graph_ent trace;
-	unsigned long return_hooker = (unsigned long)
-				&return_to_handler;
+	unsigned long return_hooker = (unsigned long)&return_to_handler;
 
 	if (unlikely(atomic_read(&current->tracing_graph_pause)))
 		return;
 
+#if CONFIG_PPC64
+	/* non core kernel code needs to save and restore the TOC */
+	if (REGION_ID(self_addr) != KERNEL_REGION_ID)
+		return_hooker = (unsigned long)&mod_return_to_handler;
+#endif
+
 	return_hooker = GET_ADDR(return_hooker);
 
 	/*
-- 
cgit v1.2.2


From bf528a3a9bd11b6ae39684b18c9c0678f23924fd Mon Sep 17 00:00:00 2001
From: Steven Rostedt <rostedt@goodmis.org>
Date: Wed, 11 Feb 2009 15:01:18 -0500
Subject: powerpc32, ftrace: save and restore mcount regs with macro

Impact: clean up

Use a macro to save and restore the registers for PowerPC32,
since that code is duplicated.

This is similar to the work done by Cyrill Gorcunov for the
mcount code in x86_64.

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/entry_32.S | 68 ++++++------------------------------------
 1 file changed, 9 insertions(+), 59 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 301c646d1a7d..fd54cb59728e 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -1176,59 +1176,22 @@ _GLOBAL(_mcount)
 	bctr
 
 _GLOBAL(ftrace_caller)
-	/* Based off of objdump optput from glibc */
-	stwu	r1,-48(r1)
-	stw	r3, 12(r1)
-	stw	r4, 16(r1)
-	stw	r5, 20(r1)
-	stw	r6, 24(r1)
-	mflr	r3
-	lwz	r4, 52(r1)
-	mfcr	r5
-	stw	r7, 28(r1)
-	stw	r8, 32(r1)
-	stw	r9, 36(r1)
-	stw	r10,40(r1)
-	stw	r3, 44(r1)
-	stw	r5, 8(r1)
+	MCOUNT_SAVE_FRAME
+	/* r3 ends up with link register */
 	subi	r3, r3, MCOUNT_INSN_SIZE
 .globl ftrace_call
 ftrace_call:
 	bl	ftrace_stub
 	nop
-	lwz	r6, 8(r1)
-	lwz	r0, 44(r1)
-	lwz	r3, 12(r1)
-	mtctr	r0
-	lwz	r4, 16(r1)
-	mtcr	r6
-	lwz	r5, 20(r1)
-	lwz	r6, 24(r1)
-	lwz	r0, 52(r1)
-	lwz	r7, 28(r1)
-	lwz	r8, 32(r1)
-	mtlr	r0
-	lwz	r9, 36(r1)
-	lwz	r10,40(r1)
-	addi	r1, r1, 48
+
+	MCOUNT_RESTORE_FRAME
+	/* old link register ends up in ctr reg */
 	bctr
 #else
 _GLOBAL(mcount)
 _GLOBAL(_mcount)
-	stwu	r1,-48(r1)
-	stw	r3, 12(r1)
-	stw	r4, 16(r1)
-	stw	r5, 20(r1)
-	stw	r6, 24(r1)
-	mflr	r3
-	lwz	r4, 52(r1)
-	mfcr	r5
-	stw	r7, 28(r1)
-	stw	r8, 32(r1)
-	stw	r9, 36(r1)
-	stw	r10,40(r1)
-	stw	r3, 44(r1)
-	stw	r5, 8(r1)
+
+	MCOUNT_SAVE_FRAME
 
 	subi	r3, r3, MCOUNT_INSN_SIZE
 	LOAD_REG_ADDR(r5, ftrace_trace_function)
@@ -1239,21 +1202,8 @@ _GLOBAL(_mcount)
 
 	nop
 
-	lwz	r6, 8(r1)
-	lwz	r0, 44(r1)
-	lwz	r3, 12(r1)
-	mtctr	r0
-	lwz	r4, 16(r1)
-	mtcr	r6
-	lwz	r5, 20(r1)
-	lwz	r6, 24(r1)
-	lwz	r0, 52(r1)
-	lwz	r7, 28(r1)
-	lwz	r8, 32(r1)
-	mtlr	r0
-	lwz	r9, 36(r1)
-	lwz	r10,40(r1)
-	addi	r1, r1, 48
+	MCOUNT_RESTORE_FRAME
+	
 	bctr
 #endif
 
-- 
cgit v1.2.2


From fad4f47cc8b2b8f7e7d062c40c66188cdf783137 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <rostedt@goodmis.org>
Date: Wed, 11 Feb 2009 19:10:57 -0500
Subject: powerpc32, ftrace: port function graph tracer to ppc32, static only

This patch ports the function graph tracer for PowerPC, but only
for static function tracing.

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/entry_32.S | 43 +++++++++++++++++++++++++++++++++++++++++-
 arch/powerpc/kernel/ftrace.c   |  2 +-
 2 files changed, 43 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index fd54cb59728e..12247b937d25 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -1199,9 +1199,11 @@ _GLOBAL(_mcount)
 
 	mtctr	r5
 	bctrl
-
 	nop
 
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+	b	ftrace_graph_caller
+#endif
 	MCOUNT_RESTORE_FRAME
 	
 	bctr
@@ -1210,4 +1212,43 @@ _GLOBAL(_mcount)
 _GLOBAL(ftrace_stub)
 	blr
 
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+_GLOBAL(ftrace_graph_caller)
+	/* load r4 with local address */
+	lwz	r4, 44(r1)
+	subi	r4, r4, MCOUNT_INSN_SIZE
+
+	/* get the parent address */
+	addi	r3, r1, 52
+
+	bl	prepare_ftrace_return
+	nop
+
+	MCOUNT_RESTORE_FRAME
+	/* old link register ends up in ctr reg */
+	bctr
+
+_GLOBAL(return_to_handler)
+	/* need to save return values */
+	stwu	r1, -32(r1)
+	stw	r3, 20(r1)
+	stw	r4, 16(r1)
+	stw	r31, 12(r1)
+	mr	r31, r1
+
+	bl	ftrace_return_to_handler
+	nop
+
+	/* return value has real return address */
+	mtlr	r3
+
+	lwz	r3, 20(r1)
+	lwz	r4, 16(r1)
+	lwz	r31,12(r1)
+	lwz	r1, 0(r1)
+
+	/* Jump back to real return address */
+	blr
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
 #endif /* CONFIG_MCOUNT */
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 5c6dfa97e838..dddd99bbbd8d 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -603,7 +603,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
 		"1: " PPC_LL "%[old], 0(%[parent])\n"
 		"2: " PPC_STL "%[return_hooker], 0(%[parent])\n"
 		"   li %[faulted], 0\n"
-		"3:"
+		"3:\n"
 
 		".section .fixup, \"ax\"\n"
 		"4: li %[faulted], 1\n"
-- 
cgit v1.2.2


From 60ce8f7260d9ae4ff17548f5a275edfbc200187a Mon Sep 17 00:00:00 2001
From: Steven Rostedt <rostedt@goodmis.org>
Date: Wed, 11 Feb 2009 20:06:43 -0500
Subject: powerpc32, ftrace: dynamic function graph tracer

This patch gets function graph tracing working with dynamic function
tracer on PowerPC32.

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/entry_32.S | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 12247b937d25..0506f54b4237 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -1183,7 +1183,12 @@ _GLOBAL(ftrace_caller)
 ftrace_call:
 	bl	ftrace_stub
 	nop
-
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+.globl ftrace_graph_call
+ftrace_graph_call:
+	b	ftrace_graph_stub
+_GLOBAL(ftrace_graph_stub)
+#endif
 	MCOUNT_RESTORE_FRAME
 	/* old link register ends up in ctr reg */
 	bctr
@@ -1205,7 +1210,6 @@ _GLOBAL(_mcount)
 	b	ftrace_graph_caller
 #endif
 	MCOUNT_RESTORE_FRAME
-	
 	bctr
 #endif
 
-- 
cgit v1.2.2


From b54dcfe108b1b72c9d891dce1034aa5679c0d7db Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Fri, 13 Feb 2009 06:31:39 -0800
Subject: powerpc, ftrace: use unsigned int for instruction manipulation

The original port of ftrace to PowerPC kept a lot of the code used
by x86. Some of this code was to handle x86's 5 byte instruction.
This was handled by using character arrays to manipulate the
code.

PowerPC has a consistent 4 byte instruction. Using unsigned ints
makes the code more efficient as well as more readable.
By converting to use unsigned ints to represent instructions,
I was able to remove the side effects that were needed for
manipulating character strings.

  i.e. memcpy and memcmp

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/ftrace.c | 45 ++++++++++++++++++--------------------------
 1 file changed, 18 insertions(+), 27 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index dddd99bbbd8d..610c852b92ed 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -31,22 +31,20 @@
 #endif
 
 #ifdef CONFIG_DYNAMIC_FTRACE
-static unsigned int ftrace_nop = PPC_NOP_INSTR;
-
 static unsigned int ftrace_calc_offset(long ip, long addr)
 {
 	return (int)(addr - ip);
 }
 
-static unsigned char *ftrace_nop_replace(void)
+static unsigned int ftrace_nop_replace(void)
 {
-	return (char *)&ftrace_nop;
+	return PPC_NOP_INSTR;
 }
 
-static unsigned char *
+static unsigned int
 ftrace_call_replace(unsigned long ip, unsigned long addr, int link)
 {
-	static unsigned int op;
+	unsigned int op;
 
 	/*
 	 * It would be nice to just use create_function_call, but that will
@@ -60,11 +58,7 @@ ftrace_call_replace(unsigned long ip, unsigned long addr, int link)
 	op = 0x48000000 | (link ? 1 : 0);
 	op |= (ftrace_calc_offset(ip, addr) & 0x03fffffc);
 
-	/*
-	 * No locking needed, this must be called via kstop_machine
-	 * which in essence is like running on a uniprocessor machine.
-	 */
-	return (unsigned char *)&op;
+	return op;
 }
 
 #ifdef CONFIG_PPC64
@@ -76,10 +70,9 @@ ftrace_call_replace(unsigned long ip, unsigned long addr, int link)
 #endif
 
 static int
-ftrace_modify_code(unsigned long ip, unsigned char *old_code,
-		   unsigned char *new_code)
+ftrace_modify_code(unsigned long ip, unsigned int old, unsigned int new)
 {
-	unsigned char replaced[MCOUNT_INSN_SIZE];
+	unsigned int replaced;
 
 	/*
 	 * Note: Due to modules and __init, code can
@@ -92,15 +85,15 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
 	 */
 
 	/* read the text we want to modify */
-	if (probe_kernel_read(replaced, (void *)ip, MCOUNT_INSN_SIZE))
+	if (probe_kernel_read(&replaced, (void *)ip, MCOUNT_INSN_SIZE))
 		return -EFAULT;
 
 	/* Make sure it is what we expect it to be */
-	if (memcmp(replaced, old_code, MCOUNT_INSN_SIZE) != 0)
+	if (replaced != old)
 		return -EINVAL;
 
 	/* replace the text with the new text */
-	if (probe_kernel_write((void *)ip, new_code, MCOUNT_INSN_SIZE))
+	if (probe_kernel_write((void *)ip, &new, MCOUNT_INSN_SIZE))
 		return -EPERM;
 
 	flush_icache_range(ip, ip + 8);
@@ -336,8 +329,8 @@ __ftrace_make_nop(struct module *mod,
 int ftrace_make_nop(struct module *mod,
 		    struct dyn_ftrace *rec, unsigned long addr)
 {
-	unsigned char *old, *new;
 	unsigned long ip = rec->ip;
+	unsigned int old, new;
 
 	/*
 	 * If the calling address is more that 24 bits away,
@@ -475,8 +468,8 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 
 int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 {
-	unsigned char *old, *new;
 	unsigned long ip = rec->ip;
+	unsigned int old, new;
 
 	/*
 	 * If the calling address is more that 24 bits away,
@@ -511,10 +504,10 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 int ftrace_update_ftrace_func(ftrace_func_t func)
 {
 	unsigned long ip = (unsigned long)(&ftrace_call);
-	unsigned char old[MCOUNT_INSN_SIZE], *new;
+	unsigned int old, new;
 	int ret;
 
-	memcpy(old, &ftrace_call, MCOUNT_INSN_SIZE);
+	old = *(unsigned int *)&ftrace_call;
 	new = ftrace_call_replace(ip, (unsigned long)func, 1);
 	ret = ftrace_modify_code(ip, old, new);
 
@@ -543,10 +536,9 @@ int ftrace_enable_ftrace_graph_caller(void)
 	unsigned long ip = (unsigned long)(&ftrace_graph_call);
 	unsigned long addr = (unsigned long)(&ftrace_graph_caller);
 	unsigned long stub = (unsigned long)(&ftrace_graph_stub);
-	unsigned char old[MCOUNT_INSN_SIZE], *new;
+	unsigned int old, new;
 
-	new = ftrace_call_replace(ip, stub, 0);
-	memcpy(old, new, MCOUNT_INSN_SIZE);
+	old = ftrace_call_replace(ip, stub, 0);
 	new = ftrace_call_replace(ip, addr, 0);
 
 	return ftrace_modify_code(ip, old, new);
@@ -557,10 +549,9 @@ int ftrace_disable_ftrace_graph_caller(void)
 	unsigned long ip = (unsigned long)(&ftrace_graph_call);
 	unsigned long addr = (unsigned long)(&ftrace_graph_caller);
 	unsigned long stub = (unsigned long)(&ftrace_graph_stub);
-	unsigned char old[MCOUNT_INSN_SIZE], *new;
+	unsigned int old, new;
 
-	new = ftrace_call_replace(ip, addr, 0);
-	memcpy(old, new, MCOUNT_INSN_SIZE);
+	old = ftrace_call_replace(ip, addr, 0);
 	new = ftrace_call_replace(ip, stub, 0);
 
 	return ftrace_modify_code(ip, old, new);
-- 
cgit v1.2.2


From bb9b903527eb16c8fdad59a562c29e89f5dcf233 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Fri, 13 Feb 2009 06:45:27 -0800
Subject: powerpc, ftrace: use create_branch lib function

Impact: clean up, remove duplicate code

When ftrace was first ported to PowerPC, there existed a
create_function_call that would create the instruction to make a call
to a given address. Unfortunately, this call expected to write to
the address it was given, and since it used the address to calculate
the offset, it could not be faked.

ftrace needed a way to create the instruction without actually writing
that instruction to the text section. So ftrace had to implement its
own code.

Now we have create_branch in the code patching library, which does
exactly what ftrace needs. This patch replaces ftrace's implementation
with the library function.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/ftrace.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 610c852b92ed..4c75a1c0a5b4 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -31,11 +31,6 @@
 #endif
 
 #ifdef CONFIG_DYNAMIC_FTRACE
-static unsigned int ftrace_calc_offset(long ip, long addr)
-{
-	return (int)(addr - ip);
-}
-
 static unsigned int ftrace_nop_replace(void)
 {
 	return PPC_NOP_INSTR;
@@ -46,17 +41,10 @@ ftrace_call_replace(unsigned long ip, unsigned long addr, int link)
 {
 	unsigned int op;
 
-	/*
-	 * It would be nice to just use create_function_call, but that will
-	 * update the code itself. Here we need to just return the
-	 * instruction that is going to be modified, without modifying the
-	 * code.
-	 */
 	addr = GET_ADDR(addr);
 
 	/* if (link) set op to 'bl' else 'b' */
-	op = 0x48000000 | (link ? 1 : 0);
-	op |= (ftrace_calc_offset(ip, addr) & 0x03fffffc);
+	op = create_branch((unsigned int *)ip, addr, link ? 1 : 0);
 
 	return op;
 }
-- 
cgit v1.2.2


From 16c57b3620d77e0bc981da5ef32beae730512684 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Tue, 10 Feb 2009 20:10:44 +0000
Subject: powerpc: Unify opcode definitions and support

Create a new header that becomes a single location for defining PowerPC
opcodes used by code that is either generationg instructions
at runtime (fixups, debug, etc.), emulating instructions, or just
compiling instructions old assemblers don't know about.

We currently don't handle the floating point emulation or alignment decode
as both are better handled by the specific decode support they already
have.

Added support for the new dcbzl, dcbal, msgsnd, tlbilx, & wait instructions
since older assemblers don't know about them.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/crash_dump.c |  2 +-
 arch/powerpc/kernel/entry_32.S   |  8 +++---
 arch/powerpc/kernel/ftrace.c     |  8 +++---
 arch/powerpc/kernel/head_booke.h |  2 +-
 arch/powerpc/kernel/module_64.c  |  2 +-
 arch/powerpc/kernel/traps.c      | 58 +++++++++++++---------------------------
 6 files changed, 29 insertions(+), 51 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c
index 19671aca6591..5fb667a60894 100644
--- a/arch/powerpc/kernel/crash_dump.c
+++ b/arch/powerpc/kernel/crash_dump.c
@@ -48,7 +48,7 @@ static void __init create_trampoline(unsigned long addr)
 	 * branch to "addr" we jump to ("addr" + 32 MB). Although it requires
 	 * two instructions it doesn't require any registers.
 	 */
-	patch_instruction(p, PPC_NOP_INSTR);
+	patch_instruction(p, PPC_INST_NOP);
 	patch_branch(++p, addr + PHYSICAL_START, 0);
 }
 
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 0506f54b4237..4dd38f129153 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -956,7 +956,7 @@ ret_from_crit_exc:
 	lwz	r10,crit_srr1@l(r10);
 	mtspr	SPRN_SRR0,r9;
 	mtspr	SPRN_SRR1,r10;
-	RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, RFCI)
+	RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, PPC_RFCI)
 #endif /* CONFIG_40x */
 
 #ifdef CONFIG_BOOKE
@@ -967,7 +967,7 @@ ret_from_crit_exc:
 	stw	r10,KSP_LIMIT(r9)
 	RESTORE_xSRR(SRR0,SRR1);
 	RESTORE_MMU_REGS;
-	RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, RFCI)
+	RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, PPC_RFCI)
 
 	.globl	ret_from_debug_exc
 ret_from_debug_exc:
@@ -981,7 +981,7 @@ ret_from_debug_exc:
 	RESTORE_xSRR(SRR0,SRR1);
 	RESTORE_xSRR(CSRR0,CSRR1);
 	RESTORE_MMU_REGS;
-	RET_FROM_EXC_LEVEL(SPRN_DSRR0, SPRN_DSRR1, RFDI)
+	RET_FROM_EXC_LEVEL(SPRN_DSRR0, SPRN_DSRR1, PPC_RFDI)
 
 	.globl	ret_from_mcheck_exc
 ret_from_mcheck_exc:
@@ -992,7 +992,7 @@ ret_from_mcheck_exc:
 	RESTORE_xSRR(CSRR0,CSRR1);
 	RESTORE_xSRR(DSRR0,DSRR1);
 	RESTORE_MMU_REGS;
-	RET_FROM_EXC_LEVEL(SPRN_MCSRR0, SPRN_MCSRR1, RFMCI)
+	RET_FROM_EXC_LEVEL(SPRN_MCSRR0, SPRN_MCSRR1, PPC_RFMCI)
 #endif /* CONFIG_BOOKE */
 
 /*
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 4c75a1c0a5b4..5b5d16b2cac8 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -33,7 +33,7 @@
 #ifdef CONFIG_DYNAMIC_FTRACE
 static unsigned int ftrace_nop_replace(void)
 {
-	return PPC_NOP_INSTR;
+	return PPC_INST_NOP;
 }
 
 static unsigned int
@@ -302,7 +302,7 @@ __ftrace_make_nop(struct module *mod,
 		return -EINVAL;
 	}
 
-	op = PPC_NOP_INSTR;
+	op = PPC_INST_NOP;
 
 	if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
 		return -EPERM;
@@ -380,7 +380,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 	 *  b +8; ld r2,40(r1)
 	 */
 	if (((op[0] != 0x48000008) || (op[1] != 0xe8410028)) &&
-	    ((op[0] != PPC_NOP_INSTR) || (op[1] != PPC_NOP_INSTR))) {
+	    ((op[0] != PPC_INST_NOP) || (op[1] != PPC_INST_NOP))) {
 		printk(KERN_ERR "Expected NOPs but have %x %x\n", op[0], op[1]);
 		return -EINVAL;
 	}
@@ -423,7 +423,7 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 		return -EFAULT;
 
 	/* It should be pointing to a nop */
-	if (op != PPC_NOP_INSTR) {
+	if (op != PPC_INST_NOP) {
 		printk(KERN_ERR "Expected NOP but have %x\n", op);
 		return -EINVAL;
 	}
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index bec18078239d..38e242eb0ef8 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -279,7 +279,7 @@ label:
 	lwz	r11,GPR11(r8);						      \
 	mfspr	r8,DEBUG_SPRG;						      \
 									      \
-	RFDI;								      \
+	PPC_RFDI;								      \
 	b	.;							      \
 									      \
 	/* continue normal handling for a debug exception... */		      \
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 8992b031a7b6..8fbb12508bf3 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -329,7 +329,7 @@ static unsigned long stub_for_addr(Elf64_Shdr *sechdrs,
    restore r2. */
 static int restore_r2(u32 *instruction, struct module *me)
 {
-	if (*instruction != PPC_NOP_INSTR) {
+	if (*instruction != PPC_INST_NOP) {
 		printk("%s: Expect noop after relocate, got %08x\n",
 		       me->name, *instruction);
 		return 0;
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 5457e9575685..970d66ec4657 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -52,6 +52,7 @@
 #include <asm/processor.h>
 #endif
 #include <asm/kexec.h>
+#include <asm/ppc-opcode.h>
 
 #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
 int (*__debugger)(struct pt_regs *regs);
@@ -637,29 +638,6 @@ static void parse_fpe(struct pt_regs *regs)
  * bits is faster and easier.
  *
  */
-#define INST_MFSPR_PVR		0x7c1f42a6
-#define INST_MFSPR_PVR_MASK	0xfc1fffff
-
-#define INST_DCBA		0x7c0005ec
-#define INST_DCBA_MASK		0xfc0007fe
-
-#define INST_MCRXR		0x7c000400
-#define INST_MCRXR_MASK		0xfc0007fe
-
-#define INST_STRING		0x7c00042a
-#define INST_STRING_MASK	0xfc0007fe
-#define INST_STRING_GEN_MASK	0xfc00067e
-#define INST_LSWI		0x7c0004aa
-#define INST_LSWX		0x7c00042a
-#define INST_STSWI		0x7c0005aa
-#define INST_STSWX		0x7c00052a
-
-#define INST_POPCNTB		0x7c0000f4
-#define INST_POPCNTB_MASK	0xfc0007fe
-
-#define INST_ISEL		0x7c00001e
-#define INST_ISEL_MASK		0xfc00003e
-
 static int emulate_string_inst(struct pt_regs *regs, u32 instword)
 {
 	u8 rT = (instword >> 21) & 0x1f;
@@ -670,20 +648,20 @@ static int emulate_string_inst(struct pt_regs *regs, u32 instword)
 	int pos = 0;
 
 	/* Early out if we are an invalid form of lswx */
-	if ((instword & INST_STRING_MASK) == INST_LSWX)
+	if ((instword & PPC_INST_STRING_MASK) == PPC_INST_LSWX)
 		if ((rT == rA) || (rT == NB_RB))
 			return -EINVAL;
 
 	EA = (rA == 0) ? 0 : regs->gpr[rA];
 
-	switch (instword & INST_STRING_MASK) {
-		case INST_LSWX:
-		case INST_STSWX:
+	switch (instword & PPC_INST_STRING_MASK) {
+		case PPC_INST_LSWX:
+		case PPC_INST_STSWX:
 			EA += NB_RB;
 			num_bytes = regs->xer & 0x7f;
 			break;
-		case INST_LSWI:
-		case INST_STSWI:
+		case PPC_INST_LSWI:
+		case PPC_INST_STSWI:
 			num_bytes = (NB_RB == 0) ? 32 : NB_RB;
 			break;
 		default:
@@ -695,9 +673,9 @@ static int emulate_string_inst(struct pt_regs *regs, u32 instword)
 		u8 val;
 		u32 shift = 8 * (3 - (pos & 0x3));
 
-		switch ((instword & INST_STRING_MASK)) {
-			case INST_LSWX:
-			case INST_LSWI:
+		switch ((instword & PPC_INST_STRING_MASK)) {
+			case PPC_INST_LSWX:
+			case PPC_INST_LSWI:
 				if (get_user(val, (u8 __user *)EA))
 					return -EFAULT;
 				/* first time updating this reg,
@@ -706,8 +684,8 @@ static int emulate_string_inst(struct pt_regs *regs, u32 instword)
 					regs->gpr[rT] = 0;
 				regs->gpr[rT] |= val << shift;
 				break;
-			case INST_STSWI:
-			case INST_STSWX:
+			case PPC_INST_STSWI:
+			case PPC_INST_STSWX:
 				val = regs->gpr[rT] >> shift;
 				if (put_user(val, (u8 __user *)EA))
 					return -EFAULT;
@@ -775,18 +753,18 @@ static int emulate_instruction(struct pt_regs *regs)
 		return -EFAULT;
 
 	/* Emulate the mfspr rD, PVR. */
-	if ((instword & INST_MFSPR_PVR_MASK) == INST_MFSPR_PVR) {
+	if ((instword & PPC_INST_MFSPR_PVR_MASK) == PPC_INST_MFSPR_PVR) {
 		rd = (instword >> 21) & 0x1f;
 		regs->gpr[rd] = mfspr(SPRN_PVR);
 		return 0;
 	}
 
 	/* Emulating the dcba insn is just a no-op.  */
-	if ((instword & INST_DCBA_MASK) == INST_DCBA)
+	if ((instword & PPC_INST_DCBA_MASK) == PPC_INST_DCBA)
 		return 0;
 
 	/* Emulate the mcrxr insn.  */
-	if ((instword & INST_MCRXR_MASK) == INST_MCRXR) {
+	if ((instword & PPC_INST_MCRXR_MASK) == PPC_INST_MCRXR) {
 		int shift = (instword >> 21) & 0x1c;
 		unsigned long msk = 0xf0000000UL >> shift;
 
@@ -796,16 +774,16 @@ static int emulate_instruction(struct pt_regs *regs)
 	}
 
 	/* Emulate load/store string insn. */
-	if ((instword & INST_STRING_GEN_MASK) == INST_STRING)
+	if ((instword & PPC_INST_STRING_GEN_MASK) == PPC_INST_STRING)
 		return emulate_string_inst(regs, instword);
 
 	/* Emulate the popcntb (Population Count Bytes) instruction. */
-	if ((instword & INST_POPCNTB_MASK) == INST_POPCNTB) {
+	if ((instword & PPC_INST_POPCNTB_MASK) == PPC_INST_POPCNTB) {
 		return emulate_popcntb_inst(regs, instword);
 	}
 
 	/* Emulate isel (Integer Select) instruction */
-	if ((instword & INST_ISEL_MASK) == INST_ISEL) {
+	if ((instword & PPC_INST_ISEL_MASK) == PPC_INST_ISEL) {
 		return emulate_isel(regs, instword);
 	}
 
-- 
cgit v1.2.2


From f81786913aa0ca27a3230f30d099e9613d0d7973 Mon Sep 17 00:00:00 2001
From: Tom Arbuckle <tom.d.arbuckle@gmail.com>
Date: Wed, 11 Feb 2009 10:41:48 +0000
Subject: powerpc/pci: Fix PCI<->OF matching of old style multifunc devices

Old OF variants used to create a 'dummy' parent node "multifunc-device"
for devices with more than one PCI function. Our code that matches OF
nodes to PCI devices dealt with that in one place but not in another,
this fixes it.

This has the practical effect of fixing interrupt routing of multifunction
PCI cards on some older PowerMac machines.

Signed-off-by: Tom Arbuckle <tom.d.arbuckle@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci_32.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index c6368506455f..d473634e39e3 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -218,16 +218,23 @@ scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void
 static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
 					       unsigned int devfn)
 {
-	struct device_node *np;
+	struct device_node *np, *cnp;
 	const u32 *reg;
 	unsigned int psize;
 
 	for_each_child_of_node(parent, np) {
 		reg = of_get_property(np, "reg", &psize);
-		if (reg == NULL || psize < 4)
-			continue;
-		if (((reg[0] >> 8) & 0xff) == devfn)
+                if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
 			return np;
+
+		/* Note: some OFs create a parent node "multifunc-device" as
+		 * a fake root for all functions of a multi-function device,
+		 * we go down them as well. */
+                if (!strcmp(np->name, "multifunc-device")) {
+                        cnp = scan_OF_for_pci_dev(np, devfn);
+                        if (cnp)
+                                return cnp;
+                }
 	}
 	return NULL;
 }
-- 
cgit v1.2.2


From 620165f971753c2c451c880796bac7cd66f3534a Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 12 Feb 2009 13:54:53 +0000
Subject: powerpc: Add support for using doorbells for SMP IPI

The e500mc supports the new msgsnd/doorbell mechanisms that were added in
the Power ISA 2.05 architecture.  We use the normal level doorbell for
doing SMP IPIs at this point.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/Makefile         |  2 +-
 arch/powerpc/kernel/dbell.c          | 44 ++++++++++++++++++++++++++++++++++++
 arch/powerpc/kernel/head_fsl_booke.S |  6 ++++-
 arch/powerpc/kernel/traps.c          | 21 +++++++++++++++++
 4 files changed, 71 insertions(+), 2 deletions(-)
 create mode 100644 arch/powerpc/kernel/dbell.c

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 583ba6493a62..dfec3d2790b2 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -59,7 +59,7 @@ obj-$(CONFIG_HIBERNATION)	+= swsusp.o suspend.o \
 obj64-$(CONFIG_HIBERNATION)	+= swsusp_asm64.o
 obj-$(CONFIG_MODULES)		+= module.o module_$(CONFIG_WORD_SIZE).o
 obj-$(CONFIG_44x)		+= cpu_setup_44x.o
-obj-$(CONFIG_FSL_BOOKE)		+= cpu_setup_fsl_booke.o
+obj-$(CONFIG_FSL_BOOKE)		+= cpu_setup_fsl_booke.o dbell.o
 
 extra-$(CONFIG_PPC_STD_MMU)	:= head_32.o
 extra-$(CONFIG_PPC64)		:= head_64.o
diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c
new file mode 100644
index 000000000000..1493734cd871
--- /dev/null
+++ b/arch/powerpc/kernel/dbell.c
@@ -0,0 +1,44 @@
+/*
+ * Author: Kumar Gala <galak@kernel.crashing.org>
+ *
+ * Copyright 2009 Freescale Semiconductor Inc.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/smp.h>
+#include <linux/threads.h>
+
+#include <asm/dbell.h>
+
+#ifdef CONFIG_SMP
+unsigned long dbell_smp_message[NR_CPUS];
+
+void smp_dbell_message_pass(int target, int msg)
+{
+	int i;
+
+	if(target < NR_CPUS) {
+		set_bit(msg, &dbell_smp_message[target]);
+		ppc_msgsnd(PPC_DBELL, 0, target);
+	}
+	else if(target == MSG_ALL_BUT_SELF) {
+		for_each_online_cpu(i) {
+			if (i == smp_processor_id())
+				continue;
+			set_bit(msg, &dbell_smp_message[i]);
+			ppc_msgsnd(PPC_DBELL, 0, i);
+		}
+	}
+	else { /* target == MSG_ALL */
+		for_each_online_cpu(i)
+			set_bit(msg, &dbell_smp_message[i]);
+		ppc_msgsnd(PPC_DBELL, PPC_DBELL_MSG_BRDCAST, 0);
+	}
+}
+#endif
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 4ea6e1a7e4b9..4c22620d009b 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -698,7 +698,9 @@ interrupt_base:
 	/* Performance Monitor */
 	EXCEPTION(0x2060, PerformanceMonitor, performance_monitor_exception, EXC_XFER_STD)
 
-	EXCEPTION(0x2070, Doorbell, unknown_exception, EXC_XFER_STD)
+	EXCEPTION(0x2070, Doorbell, doorbell_exception, EXC_XFER_STD)
+
+	CRITICAL_EXCEPTION(0x2080, CriticalDoorbell, unknown_exception)
 
 	/* Debug Interrupt */
 	DEBUG_DEBUG_EXCEPTION
@@ -921,6 +923,8 @@ _GLOBAL(__setup_e500mc_ivors)
 	mtspr	SPRN_IVOR35,r3
 	li	r3,Doorbell@l
 	mtspr	SPRN_IVOR36,r3
+	li	r3,CriticalDoorbell@l
+	mtspr	SPRN_IVOR37,r3
 	sync
 	blr
 
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 970d66ec4657..678fbff0d206 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -53,6 +53,9 @@
 #endif
 #include <asm/kexec.h>
 #include <asm/ppc-opcode.h>
+#ifdef CONFIG_FSL_BOOKE
+#include <asm/dbell.h>
+#endif
 
 #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
 int (*__debugger)(struct pt_regs *regs);
@@ -1122,6 +1125,24 @@ void vsx_assist_exception(struct pt_regs *regs)
 #endif /* CONFIG_VSX */
 
 #ifdef CONFIG_FSL_BOOKE
+
+void doorbell_exception(struct pt_regs *regs)
+{
+#ifdef CONFIG_SMP
+	int cpu = smp_processor_id();
+	int msg;
+
+	if (num_online_cpus() < 2)
+		return;
+
+	for (msg = 0; msg < 4; msg++)
+		if (test_and_clear_bit(msg, &dbell_smp_message[cpu]))
+			smp_message_recv(msg);
+#else
+	printk(KERN_WARNING "Received doorbell on non-smp system\n");
+#endif
+}
+
 void CacheLockingException(struct pt_regs *regs, unsigned long address,
 			   unsigned long error_code)
 {
-- 
cgit v1.2.2


From f52862f4070fb930e407d466aa82d8efcc98c9ed Mon Sep 17 00:00:00 2001
From: Brian King <brking@linux.vnet.ibm.com>
Date: Tue, 17 Feb 2009 06:49:50 +0000
Subject: powerpc/pseries: Fix partition migration hang under load

While testing partition migration with heavy CPU load using
shared processors, it was observed that sometimes the migration
would never complete and would appear to hang. Currently, the
migration code assumes that if H_SUCCESS is returned from the H_JOIN
then the migration is complete and the processor is waking up on
the target system. If there was an outstanding PROD to the processor
when the H_JOIN is called, however, it will return H_SUCCESS on the source
system, causing the migration to hang, or in some scenarios cause
the kernel to crash on the complete call waking the caller
of rtas_percpu_suspend_me. Fix this by calling H_JOIN multiple times
if necessary during the migration.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/rtas.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index fdfe14c4bdef..ee4c7609b649 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -46,6 +46,7 @@ EXPORT_SYMBOL(rtas);
 
 struct rtas_suspend_me_data {
 	atomic_t working; /* number of cpus accessing this struct */
+	atomic_t done;
 	int token; /* ibm,suspend-me */
 	int error;
 	struct completion *complete; /* wait on this until working == 0 */
@@ -689,7 +690,7 @@ static int ibm_suspend_me_token = RTAS_UNKNOWN_SERVICE;
 #ifdef CONFIG_PPC_PSERIES
 static void rtas_percpu_suspend_me(void *info)
 {
-	long rc;
+	long rc = H_SUCCESS;
 	unsigned long msr_save;
 	int cpu;
 	struct rtas_suspend_me_data *data =
@@ -701,7 +702,8 @@ static void rtas_percpu_suspend_me(void *info)
 	msr_save = mfmsr();
 	mtmsr(msr_save & ~(MSR_EE));
 
-	rc = plpar_hcall_norets(H_JOIN);
+	while (rc == H_SUCCESS && !atomic_read(&data->done))
+		rc = plpar_hcall_norets(H_JOIN);
 
 	mtmsr(msr_save);
 
@@ -724,6 +726,9 @@ static void rtas_percpu_suspend_me(void *info)
 		       smp_processor_id(), rc);
 		data->error = rc;
 	}
+
+	atomic_set(&data->done, 1);
+
 	/* This cpu did the suspend or got an error; in either case,
 	 * we need to prod all other other cpus out of join state.
 	 * Extra prods are harmless.
@@ -766,6 +771,7 @@ static int rtas_ibm_suspend_me(struct rtas_args *args)
 	}
 
 	atomic_set(&data.working, 0);
+	atomic_set(&data.done, 0);
 	data.token = rtas_token("ibm,suspend-me");
 	data.error = 0;
 	data.complete = &done;
-- 
cgit v1.2.2


From 545bba18247067bb63c94e042bed90599d08151b Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@neuling.org>
Date: Thu, 19 Feb 2009 18:51:37 +0000
Subject: powerpc: Add alignment handler for new lfiwzx instruction

lfiwzx is a new floating point load instruction in 2.06 that needs an
alignment handler for Linux.

Turns out to be the worlds easiest handler to add.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/align.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index ada06924a423..076aa0ea2345 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -187,7 +187,7 @@ static struct aligninfo aligninfo[128] = {
 	{ 4, ST+F+S+U },	/* 11 1 1010: stfsux */
 	{ 8, ST+F+U },		/* 11 1 1011: stfdux */
 	INVALID,		/* 11 1 1100 */
-	INVALID,		/* 11 1 1101 */
+	{ 4, LD+F },		/* 11 1 1101: lfiwzx */
 	INVALID,		/* 11 1 1110 */
 	INVALID,		/* 11 1 1111 */
 };
-- 
cgit v1.2.2


From 553631e25f238de3a8085d2daf9cd4dcd96f8573 Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@neuling.org>
Date: Thu, 19 Feb 2009 18:52:20 +0000
Subject: powerpc: Fix load/store float double alignment handler

When we introduced VSX, we changed the way FPRs are stored in the
thread_struct.  Unfortunately we missed the load/store float double
alignment handler code when updating how we access FPRs in the
thread_struct.

Below fixes this and merges the little/big endian case.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/align.c | 29 +++++++++++++----------------
 1 file changed, 13 insertions(+), 16 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 076aa0ea2345..5ffcfaa77d6a 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -367,27 +367,24 @@ static int emulate_multiple(struct pt_regs *regs, unsigned char __user *addr,
 static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
 			   unsigned int flags)
 {
-	char *ptr = (char *) &current->thread.TS_FPR(reg);
-	int i, ret;
+	char *ptr0 = (char *) &current->thread.TS_FPR(reg);
+	char *ptr1 = (char *) &current->thread.TS_FPR(reg+1);
+	int i, ret, sw = 0;
 
 	if (!(flags & F))
 		return 0;
 	if (reg & 1)
 		return 0;	/* invalid form: FRS/FRT must be even */
-	if (!(flags & SW)) {
-		/* not byte-swapped - easy */
-		if (!(flags & ST))
-			ret = __copy_from_user(ptr, addr, 16);
-		else
-			ret = __copy_to_user(addr, ptr, 16);
-	} else {
-		/* each FPR value is byte-swapped separately */
-		ret = 0;
-		for (i = 0; i < 16; ++i) {
-			if (!(flags & ST))
-				ret |= __get_user(ptr[i^7], addr + i);
-			else
-				ret |= __put_user(ptr[i^7], addr + i);
+	if (flags & SW)
+		sw = 7;
+	ret = 0;
+	for (i = 0; i < 8; ++i) {
+		if (!(flags & ST)) {
+			ret |= __get_user(ptr0[i^sw], addr + i);
+			ret |= __get_user(ptr1[i^sw], addr + i + 8);
+		} else {
+			ret |= __put_user(ptr0[i^sw], addr + i);
+			ret |= __put_user(ptr1[i^sw], addr + i + 8);
 		}
 	}
 	if (ret)
-- 
cgit v1.2.2


From a465f9b694bcfa4957d06751c0274ded49421c82 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Sun, 22 Feb 2009 01:49:58 +0000
Subject: powerpc: Move is_32bit_task

Move is_32bit_task into asm/thread_info.h, that allows us to test for
32/64bit tasks without an ugly CONFIG_PPC64 ifdef.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/signal.h | 10 ----------
 1 file changed, 10 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index b427bf8e1d8f..f1442d69d4ec 100644
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -39,22 +39,12 @@ extern unsigned long copy_vsx_from_user(struct task_struct *task,
 
 #ifdef CONFIG_PPC64
 
-static inline int is_32bit_task(void)
-{
-	return test_thread_flag(TIF_32BIT);
-}
-
 extern int handle_rt_signal64(int signr, struct k_sigaction *ka,
 			      siginfo_t *info, sigset_t *set,
 			      struct pt_regs *regs);
 
 #else /* CONFIG_PPC64 */
 
-static inline int is_32bit_task(void)
-{
-	return 1;
-}
-
 static inline int handle_rt_signal64(int signr, struct k_sigaction *ka,
 				     siginfo_t *info, sigset_t *set,
 				     struct pt_regs *regs)
-- 
cgit v1.2.2


From d839088caec6891a5070f0b1ce61031e458533a9 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Sun, 22 Feb 2009 01:50:03 +0000
Subject: powerpc: Randomise lower bits of stack address

Randomise the lower bits of the stack address. More randomisation is good for
security but the scatter can also help with SMT threads that share an L1. A
quick test case shows this working:

int main()
{
	int sp;
	printf("%x\n", (unsigned long)&sp & 4095);
}

before:
80
80
80
80
80

after:
610
490
300
6b0
d80

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/process.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 8ede428e76c0..69b9d2d3cb84 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -35,6 +35,8 @@
 #include <linux/utsname.h>
 #include <linux/ftrace.h>
 #include <linux/kernel_stat.h>
+#include <linux/personality.h>
+#include <linux/random.h>
 
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
@@ -1138,3 +1140,10 @@ void thread_info_cache_init(void)
 }
 
 #endif /* THREAD_SHIFT < PAGE_SHIFT */
+
+unsigned long arch_align_stack(unsigned long sp)
+{
+	if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+		sp -= get_random_int() & ~PAGE_MASK;
+	return sp & ~0xf;
+}
-- 
cgit v1.2.2


From 912f9ee21c836081e3c96dfe61025841ebeb95da Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Sun, 22 Feb 2009 01:50:04 +0000
Subject: powerpc: Randomise the brk region

Randomize the heap.

before:
tundro2:~ # sleep 1 & cat /proc/${!}/maps | grep heap
10017000-10118000 rw-p 10017000 00:00 0                                  [heap]
10017000-10118000 rw-p 10017000 00:00 0                                  [heap]
10017000-10118000 rw-p 10017000 00:00 0                                  [heap]
10017000-10118000 rw-p 10017000 00:00 0                                  [heap]
10017000-10118000 rw-p 10017000 00:00 0                                  [heap]

after
tundro2:~ # sleep 1 & cat /proc/${!}/maps | grep heap
19419000-1951a000 rw-p 19419000 00:00 0                                  [heap]
325ff000-32700000 rw-p 325ff000 00:00 0                                  [heap]
1a97c000-1aa7d000 rw-p 1a97c000 00:00 0                                  [heap]
1cc60000-1cd61000 rw-p 1cc60000 00:00 0                                  [heap]
1afa9000-1b0aa000 rw-p 1afa9000 00:00 0                                  [heap]

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/process.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 69b9d2d3cb84..30b149ce7598 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1147,3 +1147,26 @@ unsigned long arch_align_stack(unsigned long sp)
 		sp -= get_random_int() & ~PAGE_MASK;
 	return sp & ~0xf;
 }
+
+static inline unsigned long brk_rnd(void)
+{
+        unsigned long rnd = 0;
+
+	/* 8MB for 32bit, 1GB for 64bit */
+	if (is_32bit_task())
+		rnd = (long)(get_random_int() % (1<<(23-PAGE_SHIFT)));
+	else
+		rnd = (long)(get_random_int() % (1<<(30-PAGE_SHIFT)));
+
+	return rnd << PAGE_SHIFT;
+}
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+	unsigned long ret = PAGE_ALIGN(mm->brk + brk_rnd());
+
+	if (ret < mm->brk)
+		return mm->brk;
+
+	return ret;
+}
-- 
cgit v1.2.2


From 501cb16d3cfdcca99ac26fe122079f2a43b046b8 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Sun, 22 Feb 2009 01:50:07 +0000
Subject: powerpc: Randomise PIEs

Randomise ELF_ET_DYN_BASE, which is used when loading position independent
executables.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/process.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 30b149ce7598..eac064948780 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1170,3 +1170,13 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
 
 	return ret;
 }
+
+unsigned long randomize_et_dyn(unsigned long base)
+{
+	unsigned long ret = PAGE_ALIGN(base + brk_rnd());
+
+	if (ret < base)
+		return base;
+
+	return ret;
+}
-- 
cgit v1.2.2


From c3071951d0acd33b5c3f820fb5eaa3a9c2a8f212 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Tue, 10 Feb 2009 22:26:06 -0600
Subject: powerpc/fsl-booke: Add support for tlbilx instructions

The e500mc core supports the new tlbilx instructions that do core
local invalidates and also provide us the ability to take down
all TLB entries matching a given PID.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 arch/powerpc/kernel/cputable.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index f59ca710f448..b2938e0ef2f3 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1754,7 +1754,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_name		= "e500mc",
 		.cpu_features		= CPU_FTRS_E500MC,
 		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
-		.mmu_features		= MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS,
+		.mmu_features		= MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS |
+			MMU_FTR_USE_TLBILX,
 		.icache_bsize		= 64,
 		.dcache_bsize		= 64,
 		.num_pmcs		= 4,
-- 
cgit v1.2.2


From 666435bbf31bfc2aec2afccb2fb54951e573c5c1 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Sun, 22 Feb 2009 16:25:43 +0000
Subject: powerpc: Deindentify identify_cpu()

The for-loop body of identify_cpu() has gotten a little big, so move the
loop body logic into a separate function. No other changes.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/cputable.c | 122 +++++++++++++++++++++--------------------
 1 file changed, 64 insertions(+), 58 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index b2938e0ef2f3..401f973a74a0 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1785,74 +1785,80 @@ static struct cpu_spec __initdata cpu_specs[] = {
 
 static struct cpu_spec the_cpu_spec;
 
-struct cpu_spec * __init identify_cpu(unsigned long offset, unsigned int pvr)
+static void __init setup_cpu_spec(unsigned long offset, struct cpu_spec *s)
 {
-	struct cpu_spec *s = cpu_specs;
 	struct cpu_spec *t = &the_cpu_spec;
-	int i;
-
-	s = PTRRELOC(s);
 	t = PTRRELOC(t);
 
-	for (i = 0; i < ARRAY_SIZE(cpu_specs); i++,s++)
-		if ((pvr & s->pvr_mask) == s->pvr_value) {
-			/*
-			 * If we are overriding a previous value derived
-			 * from the real PVR with a new value obtained
-			 * using a logical PVR value, don't modify the
-			 * performance monitor fields.
-			 */
-			if (t->num_pmcs && !s->num_pmcs) {
-				t->cpu_name = s->cpu_name;
-				t->cpu_features = s->cpu_features;
-				t->cpu_user_features = s->cpu_user_features;
-				t->icache_bsize = s->icache_bsize;
-				t->dcache_bsize = s->dcache_bsize;
-				t->cpu_setup = s->cpu_setup;
-				t->cpu_restore = s->cpu_restore;
-				t->platform = s->platform;
-				/*
-				 * If we have passed through this logic once
-				 * before and have pulled the default case
-				 * because the real PVR was not found inside
-				 * cpu_specs[], then we are possibly running in
-				 * compatibility mode. In that case, let the
-				 * oprofiler know which set of compatibility
-				 * counters to pull from by making sure the
-				 * oprofile_cpu_type string is set to that of
-				 * compatibility mode. If the oprofile_cpu_type
-				 * already has a value, then we are possibly
-				 * overriding a real PVR with a logical one, and,
-				 * in that case, keep the current value for
-				 * oprofile_cpu_type.
-				 */
-				if (t->oprofile_cpu_type == NULL)
-					t->oprofile_cpu_type = s->oprofile_cpu_type;
-			} else
-				*t = *s;
-			*PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;
+	/*
+	 * If we are overriding a previous value derived from the real
+	 * PVR with a new value obtained using a logical PVR value,
+	 * don't modify the performance monitor fields.
+	 */
+	if (t->num_pmcs && !s->num_pmcs) {
+		t->cpu_name = s->cpu_name;
+		t->cpu_features = s->cpu_features;
+		t->cpu_user_features = s->cpu_user_features;
+		t->icache_bsize = s->icache_bsize;
+		t->dcache_bsize = s->dcache_bsize;
+		t->cpu_setup = s->cpu_setup;
+		t->cpu_restore = s->cpu_restore;
+		t->platform = s->platform;
+		/*
+		 * If we have passed through this logic once before and
+		 * have pulled the default case because the real PVR was
+		 * not found inside cpu_specs[], then we are possibly
+		 * running in compatibility mode. In that case, let the
+		 * oprofiler know which set of compatibility counters to
+		 * pull from by making sure the oprofile_cpu_type string
+		 * is set to that of compatibility mode. If the
+		 * oprofile_cpu_type already has a value, then we are
+		 * possibly overriding a real PVR with a logical one,
+		 * and, in that case, keep the current value for
+		 * oprofile_cpu_type.
+		 */
+		if (t->oprofile_cpu_type == NULL)
+			t->oprofile_cpu_type = s->oprofile_cpu_type;
+	} else
+		*t = *s;
+
+	*PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;
 
-			/*
-			 * Set the base platform string once; assumes
-			 * we're called with real pvr first.
-			 */
-			if (*PTRRELOC(&powerpc_base_platform) == NULL)
-				*PTRRELOC(&powerpc_base_platform) = t->platform;
+	/*
+	 * Set the base platform string once; assumes
+	 * we're called with real pvr first.
+	 */
+	if (*PTRRELOC(&powerpc_base_platform) == NULL)
+		*PTRRELOC(&powerpc_base_platform) = t->platform;
 
 #if defined(CONFIG_PPC64) || defined(CONFIG_BOOKE)
-			/* ppc64 and booke expect identify_cpu to also call
-			 * setup_cpu for that processor. I will consolidate
-			 * that at a later time, for now, just use #ifdef.
-			 * we also don't need to PTRRELOC the function pointer
-			 * on ppc64 and booke as we are running at 0 in real
-			 * mode on ppc64 and reloc_offset is always 0 on booke.
-			 */
-			if (s->cpu_setup) {
-				s->cpu_setup(offset, s);
-			}
+	/* ppc64 and booke expect identify_cpu to also call setup_cpu for
+	 * that processor. I will consolidate that at a later time, for now,
+	 * just use #ifdef. We also don't need to PTRRELOC the function
+	 * pointer on ppc64 and booke as we are running at 0 in real mode
+	 * on ppc64 and reloc_offset is always 0 on booke.
+	 */
+	if (s->cpu_setup) {
+		s->cpu_setup(offset, s);
+	}
 #endif /* CONFIG_PPC64 || CONFIG_BOOKE */
+}
+
+struct cpu_spec * __init identify_cpu(unsigned long offset, unsigned int pvr)
+{
+	struct cpu_spec *s = cpu_specs;
+	int i;
+
+	s = PTRRELOC(s);
+
+	for (i = 0; i < ARRAY_SIZE(cpu_specs); i++,s++) {
+		if ((pvr & s->pvr_mask) == s->pvr_value) {
+			setup_cpu_spec(offset, s);
 			return s;
 		}
+	}
+
 	BUG();
+
 	return NULL;
 }
-- 
cgit v1.2.2


From 2657dd4e301d4841ed67a4fac7d145ad8f3e1b28 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Sun, 22 Feb 2009 16:25:45 +0000
Subject: powerpc: Make sure we copy all cpu_spec features except PMC related
 ones

When identify_cpu() is called a second time with a logical PVR, it
only copies a subset of the cpu_spec fields so as to avoid overwriting
the performance monitor fields that were initialized based on the
real PVR.

However some of the other, non performance monitor related fields are
also not copied:
 * pvr_mask
 * pvr_value
 * mmu_features
 * machine_check

The fact that pvr_mask is not copied can result in show_cpuinfo()
showing the cpu as "unknown", if we override an unknown PVR with a
logical one - as reported by Shaggy.

So change the logic to copy all fields, and then put back the PMC
related ones in the case that we're overwriting a real PVR with a
logical one.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/cputable.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 401f973a74a0..638838691b20 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1788,22 +1788,27 @@ static struct cpu_spec the_cpu_spec;
 static void __init setup_cpu_spec(unsigned long offset, struct cpu_spec *s)
 {
 	struct cpu_spec *t = &the_cpu_spec;
+	struct cpu_spec old;
+
 	t = PTRRELOC(t);
+	old = *t;
+
+	/* Copy everything, then do fixups */
+	*t = *s;
 
 	/*
 	 * If we are overriding a previous value derived from the real
 	 * PVR with a new value obtained using a logical PVR value,
 	 * don't modify the performance monitor fields.
 	 */
-	if (t->num_pmcs && !s->num_pmcs) {
-		t->cpu_name = s->cpu_name;
-		t->cpu_features = s->cpu_features;
-		t->cpu_user_features = s->cpu_user_features;
-		t->icache_bsize = s->icache_bsize;
-		t->dcache_bsize = s->dcache_bsize;
-		t->cpu_setup = s->cpu_setup;
-		t->cpu_restore = s->cpu_restore;
-		t->platform = s->platform;
+	if (old.num_pmcs && !s->num_pmcs) {
+		t->num_pmcs = old.num_pmcs;
+		t->pmc_type = old.pmc_type;
+		t->oprofile_type = old.oprofile_type;
+		t->oprofile_mmcra_sihv = old.oprofile_mmcra_sihv;
+		t->oprofile_mmcra_sipr = old.oprofile_mmcra_sipr;
+		t->oprofile_mmcra_clear = old.oprofile_mmcra_clear;
+
 		/*
 		 * If we have passed through this logic once before and
 		 * have pulled the default case because the real PVR was
@@ -1817,10 +1822,9 @@ static void __init setup_cpu_spec(unsigned long offset, struct cpu_spec *s)
 		 * and, in that case, keep the current value for
 		 * oprofile_cpu_type.
 		 */
-		if (t->oprofile_cpu_type == NULL)
+		if (old.oprofile_cpu_type == NULL)
 			t->oprofile_cpu_type = s->oprofile_cpu_type;
-	} else
-		*t = *s;
+	}
 
 	*PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;
 
-- 
cgit v1.2.2


From 9e1e3723be3828d6faac03ff6889e78cc0e64286 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Mon, 23 Feb 2009 17:40:56 +0000
Subject: powerpc: Remove unused asm-offsets entries for cpu_spec

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/asm-offsets.c | 3 ---
 1 file changed, 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 19ee491e9e23..10377df38f36 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -284,9 +284,6 @@ int main(void)
 #endif /* ! CONFIG_PPC64 */
 
 	/* About the CPU features table */
-	DEFINE(CPU_SPEC_ENTRY_SIZE, sizeof(struct cpu_spec));
-	DEFINE(CPU_SPEC_PVR_MASK, offsetof(struct cpu_spec, pvr_mask));
-	DEFINE(CPU_SPEC_PVR_VALUE, offsetof(struct cpu_spec, pvr_value));
 	DEFINE(CPU_SPEC_FEATURES, offsetof(struct cpu_spec, cpu_features));
 	DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
 	DEFINE(CPU_SPEC_RESTORE, offsetof(struct cpu_spec, cpu_restore));
-- 
cgit v1.2.2


From 7c9583a4db7e3009843aaae0567d299e2837c5ae Mon Sep 17 00:00:00 2001
From: Octavian Purdila <opurdila@ixiacom.com>
Date: Wed, 4 Mar 2009 02:02:42 +0000
Subject: powerpc/oprofile: Enable support for ppc750 processors

This patch enables oprofile for all 3 FX variants and GX variant of the
750 processor.

Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/cputable.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 638838691b20..ccea2431ddf8 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -731,6 +731,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_750,
 		.machine_check		= machine_check_generic,
 		.platform		= "ppc750",
+		.oprofile_cpu_type      = "ppc/750",
+		.oprofile_type		= PPC_OPROFILE_G4,
 	},
 	{	/* 750FX rev 2.0 must disable HID0[DPM] */
 		.pvr_mask		= 0xffffffff,
@@ -746,6 +748,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_750,
 		.machine_check		= machine_check_generic,
 		.platform		= "ppc750",
+		.oprofile_cpu_type      = "ppc/750",
+		.oprofile_type		= PPC_OPROFILE_G4,
 	},
 	{	/* 750FX (All revs except 2.0) */
 		.pvr_mask		= 0xffff0000,
@@ -761,6 +765,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_750fx,
 		.machine_check		= machine_check_generic,
 		.platform		= "ppc750",
+		.oprofile_cpu_type      = "ppc/750",
+		.oprofile_type		= PPC_OPROFILE_G4,
 	},
 	{	/* 750GX */
 		.pvr_mask		= 0xffff0000,
@@ -776,6 +782,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_750fx,
 		.machine_check		= machine_check_generic,
 		.platform		= "ppc750",
+		.oprofile_cpu_type      = "ppc/750",
+		.oprofile_type		= PPC_OPROFILE_G4,
 	},
 	{	/* 740/750 (L2CR bit need fixup for 740) */
 		.pvr_mask		= 0xffff0000,
-- 
cgit v1.2.2


From e7943fbbfdb6eef03c003b374de1f802cc14f02a Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Wed, 4 Mar 2009 19:02:01 +0000
Subject: powerpc: Print linux_banner in prom_init

So at least you can see what kernel you're booting if you die
before the kernel prints it mid-way through start_kernel().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/prom_init.c        | 2 ++
 arch/powerpc/kernel/prom_init_check.sh | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 7f1b33d5e30d..4d5ebb46b2c4 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2283,6 +2283,8 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	 */
 	prom_init_stdout();
 
+	prom_printf("Preparing to boot %s", PTRRELOC((char *)linux_banner));
+
 	/*
 	 * Get default machine type. At this point, we do not differentiate
 	 * between pSeries SMP and pSeries LPAR
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index ea3a2ec03ffa..1ac136b128f0 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -20,7 +20,7 @@ WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
 _end enter_prom memcpy memset reloc_offset __secondary_hold
 __secondary_hold_acknowledge __secondary_hold_spinloop __start
 strcmp strcpy strlcpy strlen strncmp strstr logo_linux_clut224
-reloc_got2 kernstart_addr memstart_addr"
+reloc_got2 kernstart_addr memstart_addr linux_banner"
 
 NM="$1"
 OBJ="$2"
-- 
cgit v1.2.2


From a77acda0b7f2e54009955512e577812433d7abc5 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <w.sang@pengutronix.de>
Date: Mon, 9 Mar 2009 06:39:01 +0000
Subject: powerpc/pci: Fix typo: s/resouces/resources/ in a pr_debug

Fix typo: s/resouces/resources/ in a pr_debug

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 2ad17315fc88..2603f20984c4 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1482,7 +1482,7 @@ void __init pcibios_resource_survey(void)
 	 * we proceed to assigning things that were left unassigned
 	 */
 	if (!(ppc_pci_flags & PPC_PCI_PROBE_ONLY)) {
-		pr_debug("PCI: Assigning unassigned resouces...\n");
+		pr_debug("PCI: Assigning unassigned resources...\n");
 		pci_assign_unassigned_resources();
 	}
 
-- 
cgit v1.2.2


From af9c7249071bf862781df06eb24456cab763dc7d Mon Sep 17 00:00:00 2001
From: Andrew Klossner <andrew@cesa.opbu.xerox.com>
Date: Mon, 9 Mar 2009 07:52:41 +0000
Subject: powerpc/udbg: Fix lost byte during console handover; change LFCR to
 CRLF

When the console is on a serial port to be driven by serial8250, a
character can be lost from the end of the first line in the two-line
sequence

	serial8250.0: ttyS0 at MMIO 0xe0004500 (irq = 42) is a 16550A
	console handover: boot [udbg0] -> real [ttyS0]

This happens because udbg_puts or udbg_write stuff the last byte of
the line into the Tx FIFO and return, whereupon the serial8250
initialization code immediately empties that FIFO.  The fix: udbg_puts
and udbg_write now wait for the Tx FIFO to clear before returning.
This delays the system by one additional serial frame time for each
line written by udbg, but the effect is not noticeable, a cumulative
17 milliseconds for 200 lines of early printk output at 115200 baud.

Also, the routines in udbg_16550.c now emit CRLF instead of LFCR.
Linux makes a point of emitting CRLF because, when serial output is
captured to a file, LFCR sequences can confuse text editors.  See
http://lkml.org/lkml/2006/2/4/50 for some history.

Signed-off-by: Andrew Klossner <andrew@cesa.opbu.xerox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/udbg.c       |  7 +++++
 arch/powerpc/kernel/udbg_16550.c | 60 +++++++++++++++++++++++++++++++++-------
 2 files changed, 57 insertions(+), 10 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 7d6c9bb8c77f..fc9af47e2128 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -18,6 +18,7 @@
 #include <asm/udbg.h>
 
 void (*udbg_putc)(char c);
+void (*udbg_flush)(void);
 int (*udbg_getc)(void);
 int (*udbg_getc_poll)(void);
 
@@ -76,6 +77,9 @@ void udbg_puts(const char *s)
 			while ((c = *s++) != '\0')
 				udbg_putc(c);
 		}
+
+		if (udbg_flush)
+			udbg_flush();
 	}
 #if 0
 	else {
@@ -98,6 +102,9 @@ int udbg_write(const char *s, int n)
 		}
 	}
 
+	if (udbg_flush)
+		udbg_flush();
+
 	return n - remain;
 }
 
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 7b7da8cfd5e8..0362a891e54e 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -48,14 +48,21 @@ struct NS16550 {
 
 static struct NS16550 __iomem *udbg_comport;
 
-static void udbg_550_putc(char c)
+static void udbg_550_flush(void)
 {
 	if (udbg_comport) {
 		while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
 			/* wait for idle */;
-		out_8(&udbg_comport->thr, c);
+	}
+}
+
+static void udbg_550_putc(char c)
+{
+	if (udbg_comport) {
 		if (c == '\n')
 			udbg_550_putc('\r');
+		udbg_550_flush();
+		out_8(&udbg_comport->thr, c);
 	}
 }
 
@@ -108,6 +115,7 @@ void udbg_init_uart(void __iomem *comport, unsigned int speed,
 		/* Clear & enable FIFOs */
 		out_8(&udbg_comport->fcr ,0x07);
 		udbg_putc = udbg_550_putc;
+		udbg_flush = udbg_550_flush;
 		udbg_getc = udbg_550_getc;
 		udbg_getc_poll = udbg_550_getc_poll;
 	}
@@ -149,14 +157,21 @@ unsigned int udbg_probe_uart_speed(void __iomem *comport, unsigned int clock)
 }
 
 #ifdef CONFIG_PPC_MAPLE
-void udbg_maple_real_putc(char c)
+void udbg_maple_real_flush(void)
 {
 	if (udbg_comport) {
 		while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
 			/* wait for idle */;
-		real_writeb(c, &udbg_comport->thr); eieio();
+	}
+}
+
+void udbg_maple_real_putc(char c)
+{
+	if (udbg_comport) {
 		if (c == '\n')
 			udbg_maple_real_putc('\r');
+		udbg_maple_real_flush();
+		real_writeb(c, &udbg_comport->thr); eieio();
 	}
 }
 
@@ -165,20 +180,28 @@ void __init udbg_init_maple_realmode(void)
 	udbg_comport = (struct NS16550 __iomem *)0xf40003f8;
 
 	udbg_putc = udbg_maple_real_putc;
+	udbg_flush = udbg_maple_real_flush;
 	udbg_getc = NULL;
 	udbg_getc_poll = NULL;
 }
 #endif /* CONFIG_PPC_MAPLE */
 
 #ifdef CONFIG_PPC_PASEMI
-void udbg_pas_real_putc(char c)
+void udbg_pas_real_flush(void)
 {
 	if (udbg_comport) {
 		while ((real_205_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
 			/* wait for idle */;
-		real_205_writeb(c, &udbg_comport->thr); eieio();
+	}
+}
+
+void udbg_pas_real_putc(char c)
+{
+	if (udbg_comport) {
 		if (c == '\n')
 			udbg_pas_real_putc('\r');
+		udbg_pas_real_flush();
+		real_205_writeb(c, &udbg_comport->thr); eieio();
 	}
 }
 
@@ -187,6 +210,7 @@ void udbg_init_pas_realmode(void)
 	udbg_comport = (struct NS16550 __iomem *)0xfcff03f8UL;
 
 	udbg_putc = udbg_pas_real_putc;
+	udbg_flush = udbg_pas_real_flush;
 	udbg_getc = NULL;
 	udbg_getc_poll = NULL;
 }
@@ -195,14 +219,21 @@ void udbg_init_pas_realmode(void)
 #ifdef CONFIG_PPC_EARLY_DEBUG_44x
 #include <platforms/44x/44x.h>
 
-static void udbg_44x_as1_putc(char c)
+static int udbg_44x_as1_flush(void)
 {
 	if (udbg_comport) {
 		while ((as1_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
 			/* wait for idle */;
-		as1_writeb(c, &udbg_comport->thr); eieio();
+	}
+}
+
+static void udbg_44x_as1_putc(char c)
+{
+	if (udbg_comport) {
 		if (c == '\n')
 			udbg_44x_as1_putc('\r');
+		udbg_44x_as1_flush();
+		as1_writeb(c, &udbg_comport->thr); eieio();
 	}
 }
 
@@ -222,19 +253,27 @@ void __init udbg_init_44x_as1(void)
 		(struct NS16550 __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR;
 
 	udbg_putc = udbg_44x_as1_putc;
+	udbg_flush = udbg_44x_as1_flush;
 	udbg_getc = udbg_44x_as1_getc;
 }
 #endif /* CONFIG_PPC_EARLY_DEBUG_44x */
 
 #ifdef CONFIG_PPC_EARLY_DEBUG_40x
-static void udbg_40x_real_putc(char c)
+static void udbg_40x_real_flush(void)
 {
 	if (udbg_comport) {
 		while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
 			/* wait for idle */;
-		real_writeb(c, &udbg_comport->thr); eieio();
+	}
+}
+
+static void udbg_40x_real_putc(char c)
+{
+	if (udbg_comport) {
 		if (c == '\n')
 			udbg_40x_real_putc('\r');
+		udbg_40x_real_flush();
+		real_writeb(c, &udbg_comport->thr); eieio();
 	}
 }
 
@@ -254,6 +293,7 @@ void __init udbg_init_40x_realmode(void)
 		CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR;
 
 	udbg_putc = udbg_40x_real_putc;
+	udbg_flush = udbg_40x_real_flush;
 	udbg_getc = udbg_40x_real_getc;
 	udbg_getc_poll = NULL;
 }
-- 
cgit v1.2.2


From 97f7d6bcc10687ff79632da338646a266dd590fc Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 10 Mar 2009 14:45:54 +0000
Subject: powerpc/irq: Convert obsolete irq_desc_t to struct irq_desc

Impact: cleanup

Convert the last remaining users.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: linuxppc-dev@ozlabs.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/irq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 23b8b5e36f98..48ea2008b20d 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -171,7 +171,7 @@ int show_interrupts(struct seq_file *p, void *v)
 {
 	int i = *(loff_t *)v, j;
 	struct irqaction *action;
-	irq_desc_t *desc;
+	struct irq_desc *desc;
 	unsigned long flags;
 
 	if (i == 0) {
@@ -1038,7 +1038,7 @@ arch_initcall(irq_late_init);
 static int virq_debug_show(struct seq_file *m, void *private)
 {
 	unsigned long flags;
-	irq_desc_t *desc;
+	struct irq_desc *desc;
 	const char *p;
 	char none[] = "none";
 	int i;
-- 
cgit v1.2.2


From 28794d34ecb6815a3fa0a4256027c9b081a17c5f Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Tue, 10 Mar 2009 17:53:27 +0000
Subject: powerpc/kconfig: Kill PPC_MULTIPLATFORM

CONFIG_PPC_MULTIPLATFORM is a remain of the pre-powerpc days and isn't
really meaningful anymore. It was basically equivalent to PPC64 || 6xx.

This removes it along with the following changes:

 - 32-bit platforms that relied on PPC32 && PPC_MULTIPLATFORM now rely
   on 6xx which is what they want anyway.

 - A new symbol, PPC_BOOK3S, is defined that represent compliance with
   the "Server" variant of the architecture. This is set when either 6xx
   or PPC64 is set and open the door for future BOOK3E 64-bit.

 - 64-bit platforms that relied on PPC64 && PPC_MULTIPLATFORM now use
   PPC64 && PPC_BOOK3S

 - A separate and selectable CONFIG_PPC_OF_BOOT_TRAMPOLINE option is now
   used to control the use of prom_init.c

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/Makefile  | 2 +-
 arch/powerpc/kernel/head_32.S | 7 +++++--
 arch/powerpc/kernel/head_64.S | 6 +++++-
 3 files changed, 11 insertions(+), 4 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index dfec3d2790b2..71901fbda4a5 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -75,7 +75,7 @@ obj-y				+= time.o prom.o traps.o setup-common.o \
 obj-$(CONFIG_PPC32)		+= entry_32.o setup_32.o
 obj-$(CONFIG_PPC64)		+= dma-iommu.o iommu.o
 obj-$(CONFIG_KGDB)		+= kgdb.o
-obj-$(CONFIG_PPC_MULTIPLATFORM)	+= prom_init.o
+obj-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)	+= prom_init.o
 obj-$(CONFIG_MODULES)		+= ppc_ksyms.o
 obj-$(CONFIG_BOOTX_TEXT)	+= btext.o
 obj-$(CONFIG_SMP)		+= smp.o
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index a1c4cfd25ded..f8c2e6b6f457 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -108,18 +108,21 @@ __start:
  * because OF may have I/O devices mapped into that area
  * (particularly on CHRP).
  */
-#ifdef CONFIG_PPC_MULTIPLATFORM
 	cmpwi	0,r5,0
 	beq	1f
 
+#ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE
 	/* find out where we are now */
 	bcl	20,31,$+4
 0:	mflr	r8			/* r8 = runtime addr here */
 	addis	r8,r8,(_stext - 0b)@ha
 	addi	r8,r8,(_stext - 0b)@l	/* current runtime base addr */
 	bl	prom_init
+#endif /* CONFIG_PPC_OF_BOOT_TRAMPOLINE */
+
+	/* We never return. We also hit that trap if trying to boot
+	 * from OF while CONFIG_PPC_OF_BOOT_TRAMPOLINE isn't selected */
 	trap
-#endif
 
 /*
  * Check for BootX signature when supporting PowerMac and branch to
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index ebaedafc8e67..50ef505b8fb6 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -1360,6 +1360,7 @@ _GLOBAL(__start_initialization_multiplatform)
 	b	.__after_prom_start
 
 _INIT_STATIC(__boot_from_prom)
+#ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE
 	/* Save parameters */
 	mr	r31,r3
 	mr	r30,r4
@@ -1390,7 +1391,10 @@ _INIT_STATIC(__boot_from_prom)
 	/* Do all of the interaction with OF client interface */
 	mr	r8,r26
 	bl	.prom_init
-	/* We never return */
+#endif /* #CONFIG_PPC_OF_BOOT_TRAMPOLINE */
+
+	/* We never return. We also hit that trap if trying to boot
+	 * from OF while CONFIG_PPC_OF_BOOT_TRAMPOLINE isn't selected */
 	trap
 
 _STATIC(__after_prom_start)
-- 
cgit v1.2.2


From 1c8d7b0a562da06d3ebe83f01b1ed553205d1ae4 Mon Sep 17 00:00:00 2001
From: Matthew Wilcox <willy@linux.intel.com>
Date: Tue, 17 Mar 2009 08:54:10 -0400
Subject: PCI MSI: Add support for multiple MSI

Add the new API pci_enable_msi_block() to allow drivers to
request multiple MSI and reimplement pci_enable_msi in terms of
pci_enable_msi_block.  Ensure that the architecture back ends don't
have to know about multiple MSI.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 arch/powerpc/kernel/msi.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c
index 3bb7d3dd28be..0c16e2a854e5 100644
--- a/arch/powerpc/kernel/msi.c
+++ b/arch/powerpc/kernel/msi.c
@@ -19,6 +19,10 @@ int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
 		return -ENOSYS;
 	}
 
+	/* PowerPC doesn't support multiple MSI yet */
+	if (type == PCI_CAP_ID_MSI && nvec > 1)
+		return 1;
+
 	if (ppc_md.msi_check_device) {
 		pr_debug("msi: Using platform check routine.\n");
 		return ppc_md.msi_check_device(dev, nvec, type);
-- 
cgit v1.2.2


From 151a9f4aef53fb9cc1e192c7d321c1d820232f4a Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Sun, 22 Mar 2009 16:04:53 +0000
Subject: powerpc: Fix prom_init on 32-bit OF machines

Commit e7943fbbfdb6eef03c003b374de1f802cc14f02a broke ppc32 using
Open Firmware client interface due to using the wrong relocation
macro when accessing the variable "linux_banner".

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/prom_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 4d5ebb46b2c4..2e026c0407d4 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2283,7 +2283,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	 */
 	prom_init_stdout();
 
-	prom_printf("Preparing to boot %s", PTRRELOC((char *)linux_banner));
+	prom_printf("Preparing to boot %s", RELOC(linux_banner));
 
 	/*
 	 * Get default machine type. At this point, we do not differentiate
-- 
cgit v1.2.2


From 9a3719341a9b5d2f5a2e590497346b61cf3462a5 Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Wed, 11 Mar 2009 12:20:05 +0000
Subject: powerpc: Make sysfs code use smp_call_function_single

Impact: performance improvement

This fixes 'powerpc: avoid cpumask games in arch/powerpc/kernel/sysfs.c'
which talked about using smp_call_function_single, but actually used
work_on_cpu (an older version of the patch).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/sysfs.c | 31 ++++++-------------------------
 1 file changed, 6 insertions(+), 25 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 4a2ee08af6a7..e6cd6c990c25 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -134,36 +134,16 @@ void ppc_enable_pmcs(void)
 }
 EXPORT_SYMBOL(ppc_enable_pmcs);
 
-#if defined(CONFIG_6xx) || defined(CONFIG_PPC64)
-/* XXX convert to rusty's on_one_cpu */
-static unsigned long run_on_cpu(unsigned long cpu,
-			        unsigned long (*func)(unsigned long),
-				unsigned long arg)
-{
-	cpumask_t old_affinity = current->cpus_allowed;
-	unsigned long ret;
-
-	/* should return -EINVAL to userspace */
-	if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
-		return 0;
-
-	ret = func(arg);
-
-	set_cpus_allowed(current, old_affinity);
-
-	return ret;
-}
-#endif
 
 #define SYSFS_PMCSETUP(NAME, ADDRESS) \
-static unsigned long read_##NAME(unsigned long junk) \
+static void read_##NAME(void *val) \
 { \
-	return mfspr(ADDRESS); \
+	mtspr(ADDRESS, *(unsigned long *)val);	\
 } \
 static unsigned long write_##NAME(unsigned long val) \
 { \
 	ppc_enable_pmcs(); \
-	mtspr(ADDRESS, val); \
+	mtspr(ADDRESS, *(unsigned long *)val);	\
 	return 0; \
 } \
 static ssize_t show_##NAME(struct sys_device *dev, \
@@ -171,7 +151,8 @@ static ssize_t show_##NAME(struct sys_device *dev, \
 			char *buf) \
 { \
 	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
-	unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
+	unsigned long val; \
+	smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1);	\
 	return sprintf(buf, "%lx\n", val); \
 } \
 static ssize_t __used \
@@ -183,7 +164,7 @@ static ssize_t __used \
 	int ret = sscanf(buf, "%lx", &val); \
 	if (ret != 1) \
 		return -EINVAL; \
-	run_on_cpu(cpu->sysdev.id, write_##NAME, val); \
+	smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
 	return count; \
 }
 
-- 
cgit v1.2.2


From 32ac57668dccf6c4ad5522b61a86fe211886c180 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 19 Mar 2009 03:40:50 +0000
Subject: powerpc/pci: Default to dma_direct_ops for pci dma_ops

This will allow us to remove the ppc32 specific checks in get_dma_ops()
that defaults to dma_direct_ops if the archdata is NULL.  We really
should always have archdata set to something going forward.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 2603f20984c4..9c69e7e145c5 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -50,7 +50,7 @@ resource_size_t isa_mem_base;
 unsigned int ppc_pci_flags = 0;
 
 
-static struct dma_mapping_ops *pci_dma_ops;
+static struct dma_mapping_ops *pci_dma_ops = &dma_direct_ops;
 
 void set_pci_dma_ops(struct dma_mapping_ops *dma_ops)
 {
-- 
cgit v1.2.2


From d746286c1fcb186ce16295c30d48db852ede6772 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 19 Mar 2009 03:40:51 +0000
Subject: powerpc: setup default archdata for {of_}platform via
 bus_register_notifier

Since a number of powerpc chips are SoCs we end up having dma-able
devices that are registered as platform or of_platform devices.  We need
to hook the archdata to setup proper dma_ops for these devices.

Rather than having to add a bus_notify to each platform we add a default
one at the highest priority (called first) to set the default dma_ops for
of_platform and platform devices to dma_direct_ops.  This allows platform
code to override the ops by providing their own notifier call back.

In the future to enable >4G DMA support on ppc32 we can hook swiotlb ops.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/setup-common.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 705fc4bf3800..9774f9fed96e 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -35,6 +35,8 @@
 #include <linux/debugfs.h>
 #include <linux/percpu.h>
 #include <linux/lmb.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/processor.h>
@@ -669,3 +671,37 @@ static int powerpc_debugfs_init(void)
 }
 arch_initcall(powerpc_debugfs_init);
 #endif
+
+static int ppc_dflt_bus_notify(struct notifier_block *nb,
+				unsigned long action, void *data)
+{
+	struct device *dev = data;
+
+	/* We are only intereted in device addition */
+	if (action != BUS_NOTIFY_ADD_DEVICE)
+		return 0;
+
+	set_dma_ops(dev, &dma_direct_ops);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block ppc_dflt_plat_bus_notifier = {
+	.notifier_call = ppc_dflt_bus_notify,
+	.priority = INT_MAX,
+};
+
+static struct notifier_block ppc_dflt_of_bus_notifier = {
+	.notifier_call = ppc_dflt_bus_notify,
+	.priority = INT_MAX,
+};
+
+static int __init setup_bus_notifier(void)
+{
+	bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier);
+	bus_register_notifier(&of_platform_bus_type, &ppc_dflt_of_bus_notifier);
+
+	return 0;
+}
+
+arch_initcall(setup_bus_notifier);
-- 
cgit v1.2.2


From 00fcb14703d8322a9c66cb3f48b5c49ac7d43f0a Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 19 Mar 2009 03:55:39 +0000
Subject: powerpc/mm: Remove unused register usage in SW TLB miss handling

Long ago we had some code that actually used the CTR in the SW TLB
miss handlers (603/e300).  Since we don't use it no reason to waste
cycles saving it off and restoring it (we actually didn't restore it
in the fast path case).

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/head_32.S | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index d0bad4b93a9c..f37df0c3afbd 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -475,12 +475,11 @@ SystemCall:
 	. = 0x1000
 InstructionTLBMiss:
 /*
- * r0:	stored ctr
+ * r0:	scratch
  * r1:	linux style pte ( later becomes ppc hardware pte )
  * r2:	ptr to linux-style pte
  * r3:	scratch
  */
-	mfctr	r0
 	/* Get PTE (linux-style) and check access */
 	mfspr	r3,SPRN_IMISS
 	lis	r1,PAGE_OFFSET@h		/* check if kernel address */
@@ -531,7 +530,6 @@ InstructionAddressInvalid:
 
 	addis	r1,r1,0x2000
 	mtspr	SPRN_DSISR,r1	/* (shouldn't be needed) */
-	mtctr	r0		/* Restore CTR */
 	andi.	r2,r3,0xFFFF	/* Clear upper bits of SRR1 */
 	or	r2,r2,r1
 	mtspr	SPRN_SRR1,r2
@@ -552,12 +550,11 @@ InstructionAddressInvalid:
 	. = 0x1100
 DataLoadTLBMiss:
 /*
- * r0:	stored ctr
+ * r0:	scratch
  * r1:	linux style pte ( later becomes ppc hardware pte )
  * r2:	ptr to linux-style pte
  * r3:	scratch
  */
-	mfctr	r0
 	/* Get PTE (linux-style) and check access */
 	mfspr	r3,SPRN_DMISS
 	lis	r1,PAGE_OFFSET@h		/* check if kernel address */
@@ -607,7 +604,6 @@ DataAddressInvalid:
 	rlwinm	r1,r3,9,6,6	/* Get load/store bit */
 	addis	r1,r1,0x2000
 	mtspr	SPRN_DSISR,r1
-	mtctr	r0		/* Restore CTR */
 	andi.	r2,r3,0xFFFF	/* Clear upper bits of SRR1 */
 	mtspr	SPRN_SRR1,r2
 	mfspr	r1,SPRN_DMISS	/* Get failing address */
@@ -627,12 +623,11 @@ DataAddressInvalid:
 	. = 0x1200
 DataStoreTLBMiss:
 /*
- * r0:	stored ctr
+ * r0:	scratch
  * r1:	linux style pte ( later becomes ppc hardware pte )
  * r2:	ptr to linux-style pte
  * r3:	scratch
  */
-	mfctr	r0
 	/* Get PTE (linux-style) and check access */
 	mfspr	r3,SPRN_DMISS
 	lis	r1,PAGE_OFFSET@h		/* check if kernel address */
-- 
cgit v1.2.2


From eb3436a0139a651a39dbb37a75b10a2cccd00ad5 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 19 Mar 2009 03:55:40 +0000
Subject: powerpc/mm: Used free register to save a few cycles in SW TLB miss
 handling

Now that r0 is free we can keep the value of I/DMISS in r3 and not reload
it before doing the tlbli/d.  This saves us a few cycles in the fast path
case.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/head_32.S | 51 ++++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 27 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index f37df0c3afbd..58dcc7c03109 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -498,28 +498,27 @@ InstructionTLBMiss:
 	rlwinm.	r2,r2,0,0,19		/* extract address of pte page */
 	beq-	InstructionAddressInvalid	/* return if no mapping */
 	rlwimi	r2,r3,22,20,29		/* insert next 10 bits of address */
-	lwz	r3,0(r2)		/* get linux-style pte */
-	andc.	r1,r1,r3		/* check access & ~permission */
+	lwz	r0,0(r2)		/* get linux-style pte */
+	andc.	r1,r1,r0		/* check access & ~permission */
 	bne-	InstructionAddressInvalid /* return if access not permitted */
-	ori	r3,r3,_PAGE_ACCESSED	/* set _PAGE_ACCESSED in pte */
+	ori	r0,r0,_PAGE_ACCESSED	/* set _PAGE_ACCESSED in pte */
 	/*
 	 * NOTE! We are assuming this is not an SMP system, otherwise
 	 * we would need to update the pte atomically with lwarx/stwcx.
 	 */
-	stw	r3,0(r2)		/* update PTE (accessed bit) */
+	stw	r0,0(r2)		/* update PTE (accessed bit) */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
-	rlwinm	r1,r3,32-10,31,31	/* _PAGE_RW -> PP lsb */
-	rlwinm	r2,r3,32-7,31,31	/* _PAGE_DIRTY -> PP lsb */
+	rlwinm	r1,r0,32-10,31,31	/* _PAGE_RW -> PP lsb */
+	rlwinm	r2,r0,32-7,31,31	/* _PAGE_DIRTY -> PP lsb */
 	and	r1,r1,r2		/* writable if _RW and _DIRTY */
-	rlwimi	r3,r3,32-1,30,30	/* _PAGE_USER -> PP msb */
-	rlwimi	r3,r3,32-1,31,31	/* _PAGE_USER -> PP lsb */
+	rlwimi	r0,r0,32-1,30,30	/* _PAGE_USER -> PP msb */
+	rlwimi	r0,r0,32-1,31,31	/* _PAGE_USER -> PP lsb */
 	ori	r1,r1,0xe04		/* clear out reserved bits */
-	andc	r1,r3,r1		/* PP = user? (rw&dirty? 2: 3): 0 */
+	andc	r1,r0,r1		/* PP = user? (rw&dirty? 2: 3): 0 */
 BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
 	mtspr	SPRN_RPA,r1
-	mfspr	r3,SPRN_IMISS
 	tlbli	r3
 	mfspr	r3,SPRN_SRR1		/* Need to restore CR0 */
 	mtcrf	0x80,r3
@@ -573,28 +572,27 @@ DataLoadTLBMiss:
 	rlwinm.	r2,r2,0,0,19		/* extract address of pte page */
 	beq-	DataAddressInvalid	/* return if no mapping */
 	rlwimi	r2,r3,22,20,29		/* insert next 10 bits of address */
-	lwz	r3,0(r2)		/* get linux-style pte */
-	andc.	r1,r1,r3		/* check access & ~permission */
+	lwz	r0,0(r2)		/* get linux-style pte */
+	andc.	r1,r1,r0		/* check access & ~permission */
 	bne-	DataAddressInvalid	/* return if access not permitted */
-	ori	r3,r3,_PAGE_ACCESSED	/* set _PAGE_ACCESSED in pte */
+	ori	r0,r0,_PAGE_ACCESSED	/* set _PAGE_ACCESSED in pte */
 	/*
 	 * NOTE! We are assuming this is not an SMP system, otherwise
 	 * we would need to update the pte atomically with lwarx/stwcx.
 	 */
-	stw	r3,0(r2)		/* update PTE (accessed bit) */
+	stw	r0,0(r2)		/* update PTE (accessed bit) */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
-	rlwinm	r1,r3,32-10,31,31	/* _PAGE_RW -> PP lsb */
-	rlwinm	r2,r3,32-7,31,31	/* _PAGE_DIRTY -> PP lsb */
+	rlwinm	r1,r0,32-10,31,31	/* _PAGE_RW -> PP lsb */
+	rlwinm	r2,r0,32-7,31,31	/* _PAGE_DIRTY -> PP lsb */
 	and	r1,r1,r2		/* writable if _RW and _DIRTY */
-	rlwimi	r3,r3,32-1,30,30	/* _PAGE_USER -> PP msb */
-	rlwimi	r3,r3,32-1,31,31	/* _PAGE_USER -> PP lsb */
+	rlwimi	r0,r0,32-1,30,30	/* _PAGE_USER -> PP msb */
+	rlwimi	r0,r0,32-1,31,31	/* _PAGE_USER -> PP lsb */
 	ori	r1,r1,0xe04		/* clear out reserved bits */
-	andc	r1,r3,r1		/* PP = user? (rw&dirty? 2: 3): 0 */
+	andc	r1,r0,r1		/* PP = user? (rw&dirty? 2: 3): 0 */
 BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
 	mtspr	SPRN_RPA,r1
-	mfspr	r3,SPRN_DMISS
 	tlbld	r3
 	mfspr	r3,SPRN_SRR1		/* Need to restore CR0 */
 	mtcrf	0x80,r3
@@ -646,24 +644,23 @@ DataStoreTLBMiss:
 	rlwinm.	r2,r2,0,0,19		/* extract address of pte page */
 	beq-	DataAddressInvalid	/* return if no mapping */
 	rlwimi	r2,r3,22,20,29		/* insert next 10 bits of address */
-	lwz	r3,0(r2)		/* get linux-style pte */
-	andc.	r1,r1,r3		/* check access & ~permission */
+	lwz	r0,0(r2)		/* get linux-style pte */
+	andc.	r1,r1,r0		/* check access & ~permission */
 	bne-	DataAddressInvalid	/* return if access not permitted */
-	ori	r3,r3,_PAGE_ACCESSED|_PAGE_DIRTY
+	ori	r0,r0,_PAGE_ACCESSED|_PAGE_DIRTY
 	/*
 	 * NOTE! We are assuming this is not an SMP system, otherwise
 	 * we would need to update the pte atomically with lwarx/stwcx.
 	 */
-	stw	r3,0(r2)		/* update PTE (accessed/dirty bits) */
+	stw	r0,0(r2)		/* update PTE (accessed/dirty bits) */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
-	rlwimi	r3,r3,32-1,30,30	/* _PAGE_USER -> PP msb */
+	rlwimi	r0,r0,32-1,30,30	/* _PAGE_USER -> PP msb */
 	li	r1,0xe05		/* clear out reserved bits & PP lsb */
-	andc	r1,r3,r1		/* PP = user? 2: 0 */
+	andc	r1,r0,r1		/* PP = user? 2: 0 */
 BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
 	mtspr	SPRN_RPA,r1
-	mfspr	r3,SPRN_DMISS
 	tlbld	r3
 	mfspr	r3,SPRN_SRR1		/* Need to restore CR0 */
 	mtcrf	0x80,r3
-- 
cgit v1.2.2


From 2319f1239592d0de80414ad2338c2bd7384a2a41 Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Thu, 19 Mar 2009 03:55:41 +0000
Subject: powerpc/mm: e300c2/c3/c4 TLB errata workaround

Complete workaround for DTLB errata in e300c2/c3/c4 processors.

Due to the bug, the hardware-implemented LRU algorythm always goes to way
1 of the TLB. This fix implements the proposed software workaround in
form of a LRW table for chosing the TLB-way.

Based on patch from David Jander <david@protonic.nl>

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/cpu_setup_6xx.S |  5 +++++
 arch/powerpc/kernel/cputable.c      |  9 ++++++---
 arch/powerpc/kernel/head_32.S       | 32 ++++++++++++++++++++++++++++----
 3 files changed, 39 insertions(+), 7 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S
index 72d1d7395254..54f767e31a1a 100644
--- a/arch/powerpc/kernel/cpu_setup_6xx.S
+++ b/arch/powerpc/kernel/cpu_setup_6xx.S
@@ -15,9 +15,14 @@
 #include <asm/ppc_asm.h>
 #include <asm/asm-offsets.h>
 #include <asm/cache.h>
+#include <asm/mmu.h>
 
 _GLOBAL(__setup_cpu_603)
 	mflr	r4
+BEGIN_MMU_FTR_SECTION
+	li	r10,0
+	mtspr	SPRN_SPRG4,r10		/* init SW LRU tracking */
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU)
 BEGIN_FTR_SECTION
 	bl	__init_fpu_registers
 END_FTR_SECTION_IFCLR(CPU_FTR_FPU_UNAVAILABLE)
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index ccea2431ddf8..cd1b687544f3 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1090,7 +1090,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_name		= "e300c2",
 		.cpu_features		= CPU_FTRS_E300C2,
 		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
-		.mmu_features		= MMU_FTR_USE_HIGH_BATS,
+		.mmu_features		= MMU_FTR_USE_HIGH_BATS |
+			MMU_FTR_NEED_DTLB_SW_LRU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.cpu_setup		= __setup_cpu_603,
@@ -1103,7 +1104,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_name		= "e300c3",
 		.cpu_features		= CPU_FTRS_E300,
 		.cpu_user_features	= COMMON_USER,
-		.mmu_features		= MMU_FTR_USE_HIGH_BATS,
+		.mmu_features		= MMU_FTR_USE_HIGH_BATS |
+			MMU_FTR_NEED_DTLB_SW_LRU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.cpu_setup		= __setup_cpu_603,
@@ -1118,7 +1120,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_name		= "e300c4",
 		.cpu_features		= CPU_FTRS_E300,
 		.cpu_user_features	= COMMON_USER,
-		.mmu_features		= MMU_FTR_USE_HIGH_BATS,
+		.mmu_features		= MMU_FTR_USE_HIGH_BATS |
+			MMU_FTR_NEED_DTLB_SW_LRU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.cpu_setup		= __setup_cpu_603,
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 58dcc7c03109..54e68c11ae15 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -593,9 +593,21 @@ BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
 	mtspr	SPRN_RPA,r1
+	mfspr	r2,SPRN_SRR1		/* Need to restore CR0 */
+	mtcrf	0x80,r2
+BEGIN_MMU_FTR_SECTION
+	li	r0,1
+	mfspr	r1,SPRN_SPRG4
+	rlwinm	r2,r3,20,27,31		/* Get Address bits 15:19 */
+	slw	r0,r0,r2
+	xor	r1,r0,r1
+	srw	r0,r1,r2
+	mtspr   SPRN_SPRG4,r1
+	mfspr	r2,SPRN_SRR1
+	rlwimi	r2,r0,31-14,14,14
+	mtspr   SPRN_SRR1,r2
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU)
 	tlbld	r3
-	mfspr	r3,SPRN_SRR1		/* Need to restore CR0 */
-	mtcrf	0x80,r3
 	rfi
 DataAddressInvalid:
 	mfspr	r3,SPRN_SRR1
@@ -661,9 +673,21 @@ BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
 	mtspr	SPRN_RPA,r1
+	mfspr	r2,SPRN_SRR1		/* Need to restore CR0 */
+	mtcrf	0x80,r2
+BEGIN_MMU_FTR_SECTION
+	li	r0,1
+	mfspr	r1,SPRN_SPRG4
+	rlwinm	r2,r3,20,27,31		/* Get Address bits 15:19 */
+	slw	r0,r0,r2
+	xor	r1,r0,r1
+	srw	r0,r1,r2
+	mtspr   SPRN_SPRG4,r1
+	mfspr	r2,SPRN_SRR1
+	rlwimi	r2,r0,31-14,14,14
+	mtspr   SPRN_SRR1,r2
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU)
 	tlbld	r3
-	mfspr	r3,SPRN_SRR1		/* Need to restore CR0 */
-	mtcrf	0x80,r3
 	rfi
 
 #ifndef CONFIG_ALTIVEC
-- 
cgit v1.2.2


From 757c74d298dc8438760b8dea275c4c6e0ac8a77f Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 19 Mar 2009 19:34:16 +0000
Subject: powerpc/mm: Introduce early_init_mmu() on 64-bit

This moves some MMU related init code out of setup_64.c into hash_utils_64.c
and calls it early_init_mmu() and early_init_mmu_secondary(). This will
make it easier to plug in a new MMU type.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/setup_64.c | 35 +++++------------------------------
 1 file changed, 5 insertions(+), 30 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 73e16e298e28..c410c606955d 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -202,8 +202,6 @@ void __init early_setup(unsigned long dt_ptr)
 
 	/* Fix up paca fields required for the boot cpu */
 	get_paca()->cpu_start = 1;
-	get_paca()->stab_real = __pa((u64)&initial_stab);
-	get_paca()->stab_addr = (u64)&initial_stab;
 
 	/* Probe the machine type */
 	probe_machine();
@@ -212,20 +210,8 @@ void __init early_setup(unsigned long dt_ptr)
 
 	DBG("Found, Initializing memory management...\n");
 
-	/*
-	 * Initialize the MMU Hash table and create the linear mapping
-	 * of memory. Has to be done before stab/slb initialization as
-	 * this is currently where the page size encoding is obtained
-	 */
-	htab_initialize();
-
-	/*
-	 * Initialize stab / SLB management except on iSeries
-	 */
-	if (cpu_has_feature(CPU_FTR_SLB))
-		slb_initialize();
-	else if (!firmware_has_feature(FW_FEATURE_ISERIES))
-		stab_initialize(get_paca()->stab_real);
+	/* Initialize the hash table or TLB handling */
+	early_init_mmu();
 
 	DBG(" <- early_setup()\n");
 }
@@ -233,22 +219,11 @@ void __init early_setup(unsigned long dt_ptr)
 #ifdef CONFIG_SMP
 void early_setup_secondary(void)
 {
-	struct paca_struct *lpaca = get_paca();
-
 	/* Mark interrupts enabled in PACA */
-	lpaca->soft_enabled = 0;
+	get_paca()->soft_enabled = 0;
 
-	/* Initialize hash table for that CPU */
-	htab_initialize_secondary();
-
-	/* Initialize STAB/SLB. We use a virtual address as it works
-	 * in real mode on pSeries and we want a virutal address on
-	 * iSeries anyway
-	 */
-	if (cpu_has_feature(CPU_FTR_SLB))
-		slb_initialize();
-	else
-		stab_initialize(lpaca->stab_addr);
+	/* Initialize the hash table or TLB handling */
+	early_init_mmu_secondary();
 }
 
 #endif /* CONFIG_SMP */
-- 
cgit v1.2.2


From ceb93a9ff16612314d757874b6415ffbb2091576 Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@hobbes.lan>
Date: Wed, 25 Mar 2009 08:54:29 -0700
Subject: powerpc/PCI: include pci.h in powerpc MSI implementation

This file uses PCI MSI defines and so needs pci.h.

Tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 arch/powerpc/kernel/msi.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c
index 0c16e2a854e5..8bbc12d20f5c 100644
--- a/arch/powerpc/kernel/msi.c
+++ b/arch/powerpc/kernel/msi.c
@@ -9,6 +9,7 @@
 
 #include <linux/kernel.h>
 #include <linux/msi.h>
+#include <linux/pci.h>
 
 #include <asm/machdep.h>
 
-- 
cgit v1.2.2


From efbda86098455da014be849713df6498cefc5a2a Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Date: Wed, 25 Mar 2009 06:23:59 +0000
Subject: powerpc: Sanitize stack pointer in signal handling code

On powerpc64 machines running 32-bit userspace, we can get garbage bits in the
stack pointer passed into the kernel.  Most places handle this correctly, but
the signal handling code uses the passed value directly for allocating signal
stack frames.

This fixes the issue by introducing a get_clean_sp function that returns a
sanitized stack pointer.  For 32-bit tasks on a 64-bit kernel, the stack
pointer is masked correctly.  In all other cases, the stack pointer is simply
returned.

Additionally, we pass an 'is_32' parameter to get_sigframe now in order to
get the properly sanitized stack.  The callers are know to be 32 or 64-bit
statically.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/signal.c    | 4 ++--
 arch/powerpc/kernel/signal.h    | 2 +-
 arch/powerpc/kernel/signal_32.c | 4 ++--
 arch/powerpc/kernel/signal_64.c | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index a54405ebd7b0..00b5078da9a3 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c
@@ -26,12 +26,12 @@ int show_unhandled_signals = 0;
  * Allocate space for the signal frame
  */
 void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
-			   size_t frame_size)
+			   size_t frame_size, int is_32)
 {
         unsigned long oldsp, newsp;
 
         /* Default to using normal stack */
-        oldsp = regs->gpr[1];
+        oldsp = get_clean_sp(regs, is_32);
 
 	/* Check for alt stack */
 	if ((ka->sa.sa_flags & SA_ONSTACK) &&
diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index f1442d69d4ec..6c0ddfc0603e 100644
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -15,7 +15,7 @@
 extern void do_signal(struct pt_regs *regs, unsigned long thread_info_flags);
 
 extern void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
-				  size_t frame_size);
+				  size_t frame_size, int is_32);
 extern void restore_sigmask(sigset_t *set);
 
 extern int handle_signal32(unsigned long sig, struct k_sigaction *ka,
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index b13abf305996..d670429a1608 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -836,7 +836,7 @@ int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
 
 	/* Set up Signal Frame */
 	/* Put a Real Time Context onto stack */
-	rt_sf = get_sigframe(ka, regs, sizeof(*rt_sf));
+	rt_sf = get_sigframe(ka, regs, sizeof(*rt_sf), 1);
 	addr = rt_sf;
 	if (unlikely(rt_sf == NULL))
 		goto badframe;
@@ -1182,7 +1182,7 @@ int handle_signal32(unsigned long sig, struct k_sigaction *ka,
 	unsigned long newsp = 0;
 
 	/* Set up Signal Frame */
-	frame = get_sigframe(ka, regs, sizeof(*frame));
+	frame = get_sigframe(ka, regs, sizeof(*frame), 1);
 	if (unlikely(frame == NULL))
 		goto badframe;
 	sc = (struct sigcontext __user *) &frame->sctx;
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index e132891d3cea..2fe6fc64b614 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -402,7 +402,7 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
 	unsigned long newsp = 0;
 	long err = 0;
 
-	frame = get_sigframe(ka, regs, sizeof(*frame));
+	frame = get_sigframe(ka, regs, sizeof(*frame), 0);
 	if (unlikely(frame == NULL))
 		goto badframe;
 
-- 
cgit v1.2.2


From ec78c8ac16e7a5f45e21838ab2f5573200bfcdd3 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 26 Mar 2009 19:29:06 +0000
Subject: powerpc: Fix bugs introduced by sysfs changes

Rusty's patch to change our sysfs access to various registers
to use smp_call_function_single() introduced a whole bunch of
warnings. This fixes them. This version also fixes an actual
bug in here where it did mtspr instead of mfspr when reading
the files

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/sysfs.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index e6cd6c990c25..f41aec85aa49 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -134,17 +134,15 @@ void ppc_enable_pmcs(void)
 }
 EXPORT_SYMBOL(ppc_enable_pmcs);
 
-
 #define SYSFS_PMCSETUP(NAME, ADDRESS) \
 static void read_##NAME(void *val) \
 { \
-	mtspr(ADDRESS, *(unsigned long *)val);	\
+	*(unsigned long *)val = mfspr(ADDRESS);	\
 } \
-static unsigned long write_##NAME(unsigned long val) \
+static void write_##NAME(void *val) \
 { \
 	ppc_enable_pmcs(); \
 	mtspr(ADDRESS, *(unsigned long *)val);	\
-	return 0; \
 } \
 static ssize_t show_##NAME(struct sys_device *dev, \
 			struct sysdev_attribute *attr, \
-- 
cgit v1.2.2


From 99b76233803beab302123d243eea9e41149804f3 Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Wed, 25 Mar 2009 22:48:06 +0300
Subject: proc 2/2: remove struct proc_dir_entry::owner

Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy
as correctly noted at bug #12454. Someone can lookup entry with NULL
->owner, thus not pinning enything, and release it later resulting
in module refcount underflow.

We can keep ->owner and supply it at registration time like ->proc_fops
and ->data.

But this leaves ->owner as easy-manipulative field (just one C assignment)
and somebody will forget to unpin previous/pin current module when
switching ->owner. ->proc_fops is declared as "const" which should give
some thoughts.

->read_proc/->write_proc were just fixed to not require ->owner for
protection.

rmmod'ed directories will be empty and return "." and ".." -- no harm.
And directories with tricky enough readdir and lookup shouldn't be modular.
We definitely don't want such modular code.

Removing ->owner will also make PDE smaller.

So, let's nuke it.

Kudos to Jeff Layton for reminding about this, let's say, oversight.

http://bugzilla.kernel.org/show_bug.cgi?id=12454

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
 arch/powerpc/kernel/rtas_flash.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index 149cb112cd1a..13011a96a977 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -669,7 +669,6 @@ static void remove_flash_pde(struct proc_dir_entry *dp)
 {
 	if (dp) {
 		kfree(dp->data);
-		dp->owner = NULL;
 		remove_proc_entry(dp->name, dp->parent);
 	}
 }
-- 
cgit v1.2.2


From a095bdbb136f7bed96b7adf5aa1dd27bb2f839bf Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Fri, 27 Mar 2009 23:08:34 +1100
Subject: tracing, powerpc: fix powerpc tree and tracing tree interaction

Today's linux-next build (powerpc allyesconfig) failed like this:

arch/powerpc/kernel/ftrace.c: In function 'prepare_ftrace_return':
arch/powerpc/kernel/ftrace.c:612: warning: passing argument 3 of 'ftrace_push_return_trace' makes pointer from integer without a cast
arch/powerpc/kernel/ftrace.c:612: error: too many arguments to function 'ftrace_push_return_trace'

Caused by commit 5d1a03dc541dc6672e60e57249ed22f40654ca47
("function-graph: moved the timestamp from arch to generic code") from
the tracing tree which (removed an argument from
ftrace_push_return_trace()) interacting with commit
6794c78243bfda020ab184d6d578944f8e90d26c ("powerpc64: port of the
function graph tracer") from the powerpc tree.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: <linuxppc-dev@ozlabs.org>
LKML-Reference: <20090327230834.93d0221d.sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 arch/powerpc/kernel/ftrace.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 5b5d16b2cac8..5455943f16aa 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -557,7 +557,6 @@ extern void mod_return_to_handler(void);
 void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
 {
 	unsigned long old;
-	unsigned long long calltime;
 	int faulted;
 	struct ftrace_graph_ent trace;
 	unsigned long return_hooker = (unsigned long)&return_to_handler;
@@ -606,10 +605,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
 		return;
 	}
 
-	calltime = cpu_clock(raw_smp_processor_id());
-
-	if (ftrace_push_return_trace(old, calltime,
-				self_addr, &trace.depth) == -EBUSY) {
+	if (ftrace_push_return_trace(old, self_addr, &trace.depth) == -EBUSY) {
 		*parent = old;
 		return;
 	}
-- 
cgit v1.2.2


From bcd68a70cb0eee556d86d93133aa150319bd9f53 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Thu, 19 Feb 2009 16:50:46 +0100
Subject: powerpc: Hook up rtc-generic, and kill rtc-ppc

PowerPC has been a long time user of the generic RTC abstraction, so hook up
rtc-generic:
  - Create the "rtc-generic" platform device if ppc_md.get_rtc_time is set,
  - Kill rtc-ppc, as rtc-generic offers the same functionality in a more
    generic way, and supports autoloading through udev.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
---
 arch/powerpc/kernel/time.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index c9564031a2a9..926ea864e34f 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -1127,3 +1127,19 @@ void div128_by_32(u64 dividend_high, u64 dividend_low,
 	dr->result_low  = ((u64)y << 32) + z;
 
 }
+
+static int __init rtc_init(void)
+{
+	struct platform_device *pdev;
+
+	if (!ppc_md.get_rtc_time)
+		return -ENODEV;
+
+	pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
+	if (IS_ERR(pdev))
+		return PTR_ERR(pdev);
+
+	return 0;
+}
+
+module_init(rtc_init);
-- 
cgit v1.2.2


From bf6aede712334d7338d5c47a5ee5ba3883c82a61 Mon Sep 17 00:00:00 2001
From: Jean Delvare <khali@linux-fr.org>
Date: Thu, 2 Apr 2009 16:56:54 -0700
Subject: workqueue: add to_delayed_work() helper function

It is a fairly common operation to have a pointer to a work and to need a
pointer to the delayed work it is contained in.  In particular, all
delayed works which want to rearm themselves will have to do that.  So it
would seem fair to offer a helper function for this operation.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Greg KH <greg@kroah.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/powerpc/kernel/vio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index d3694498f3af..819e59f6f7c7 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -482,7 +482,7 @@ static void vio_cmo_balance(struct work_struct *work)
 	cmo->excess.size = cmo->entitled - cmo->reserve.size;
 	cmo->excess.free = cmo->excess.size - need;
 
-	cancel_delayed_work(container_of(work, struct delayed_work, work));
+	cancel_delayed_work(to_delayed_work(work));
 	spin_unlock_irqrestore(&vio_cmo.lock, flags);
 }
 
-- 
cgit v1.2.2


From 6f2c55b843836d26528c56a0968689accaedbc67 Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Thu, 2 Apr 2009 16:56:59 -0700
Subject: Simplify copy_thread()

First argument unused since 2.3.11.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/powerpc/kernel/process.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index eac064948780..7b44a33f03c2 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -598,7 +598,7 @@ void prepare_to_copy(struct task_struct *tsk)
 /*
  * Copy a thread..
  */
-int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
+int copy_thread(unsigned long clone_flags, unsigned long usp,
 		unsigned long unused, struct task_struct *p,
 		struct pt_regs *regs)
 {
-- 
cgit v1.2.2


From 85701e6ac1b75d983610c24cfdaafdaaf56cfbb2 Mon Sep 17 00:00:00 2001
From: Huang Weiyi <weiyi.huang@gmail.com>
Date: Tue, 31 Mar 2009 02:41:18 +0000
Subject: powerpc: Remove duplicated #include's

Remove duplicated #include's in
  - arch/powerpc/include/asm/ps3fb.h
  - arch/powerpc/kernel/setup-common.c

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/setup-common.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 9774f9fed96e..02fed27af7f6 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -36,7 +36,6 @@
 #include <linux/percpu.h>
 #include <linux/lmb.h>
 #include <linux/of_platform.h>
-#include <linux/platform_device.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/processor.h>
-- 
cgit v1.2.2


From 4da727ae2aa62f134c79d38c41d15f50d912745f Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 31 Mar 2009 20:06:14 +0000
Subject: powerpc: Print progress of ibm,client-architecture method

The ibm,client-architecture method will often cause a reconfiguration reboot.
When this happens the last thing we see is:

	Hypertas detected, assuming LPAR !

Which doesn't explain what just happened.  Wrap the ibm,client-architecture
so it's clear what is going on:

	Calling ibm,client-architecture... done

In order to maintain the law of conservation of screen real estate, downgrade
two other messages to debug.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/prom_init.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 2e026c0407d4..3248f835ff99 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -732,15 +732,17 @@ static void __init prom_send_capabilities(void)
 	root = call_prom("open", 1, 1, ADDR("/"));
 	if (root != 0) {
 		/* try calling the ibm,client-architecture-support method */
+		prom_printf("Calling ibm,client-architecture...");
 		if (call_prom_ret("call-method", 3, 2, &ret,
 				  ADDR("ibm,client-architecture-support"),
 				  root,
 				  ADDR(ibm_architecture_vec)) == 0) {
 			/* the call exists... */
 			if (ret)
-				prom_printf("WARNING: ibm,client-architecture"
+				prom_printf("\nWARNING: ibm,client-architecture"
 					    "-support call FAILED!\n");
 			call_prom("close", 1, 0, root);
+			prom_printf(" done\n");
 			return;
 		}
 		call_prom("close", 1, 0, root);
@@ -1495,7 +1497,7 @@ static int __init prom_find_machine_type(void)
 		return PLATFORM_GENERIC;
 	x = prom_getproplen(rtas, "ibm,hypertas-functions");
 	if (x != PROM_ERROR) {
-		prom_printf("Hypertas detected, assuming LPAR !\n");
+		prom_debug("Hypertas detected, assuming LPAR !\n");
 		return PLATFORM_PSERIES_LPAR;
 	}
 	return PLATFORM_PSERIES;
@@ -1544,7 +1546,7 @@ static void __init prom_check_displays(void)
 	};
 	const unsigned char *clut;
 
-	prom_printf("Looking for displays\n");
+	prom_debug("Looking for displays\n");
 	for (node = 0; prom_next_node(&node); ) {
 		memset(type, 0, sizeof(type));
 		prom_getprop(node, "device_type", type, sizeof(type));
-- 
cgit v1.2.2


From 1f8737aab39e15684bf6b6b53586b7c89a269f79 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 31 Mar 2009 20:06:15 +0000
Subject: powerpc: Clean up some prom printouts

Make all messages consistent, some have spaces before the "...", some do not.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/prom_init.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 3248f835ff99..df21f95b4b1e 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1085,7 +1085,7 @@ static void __init prom_instantiate_rtas(void)
 		return;
 	}
 
-	prom_printf("instantiating rtas at 0x%x ...", base);
+	prom_printf("instantiating rtas at 0x%x...", base);
 
 	if (call_prom_ret("call-method", 3, 2, &entry,
 			  ADDR("instantiate-rtas"),
@@ -1564,7 +1564,7 @@ static void __init prom_check_displays(void)
 		if (call_prom("package-to-path", 3, 1, node, path,
 			      PROM_SCRATCH_SIZE-10) == PROM_ERROR)
 			continue;
-		prom_printf("found display   : %s, opening ... ", path);
+		prom_printf("found display   : %s, opening... ", path);
 		
 		ih = call_prom("open", 1, 1, path);
 		if (ih == 0) {
@@ -2389,7 +2389,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	/*
 	 * Now finally create the flattened device-tree
 	 */
-	prom_printf("copying OF device tree ...\n");
+	prom_printf("copying OF device tree...\n");
 	flatten_device_tree();
 
 	/*
@@ -2404,7 +2404,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	 * Call OF "quiesce" method to shut down pending DMA's from
 	 * devices etc...
 	 */
-	prom_printf("Calling quiesce ...\n");
+	prom_printf("Calling quiesce...\n");
 	call_prom("quiesce", 0, 0);
 
 	/*
-- 
cgit v1.2.2


From 0559f0a7611bdd336b7297dce179f793b565f148 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 31 Mar 2009 20:12:44 +0000
Subject: powerpc/pseries: Add dispatch dispersion statistics

PHYP tells us how often a shared processor dispatch changed physical cpus.
This can highlight performance problems caused by the hypervisor.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/lparcfg.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index 182e0f642f36..78b3f7840ade 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -434,6 +434,21 @@ static void pseries_cmo_data(struct seq_file *m)
 	seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
 }
 
+static void splpar_dispatch_data(struct seq_file *m)
+{
+	int cpu;
+	unsigned long dispatches = 0;
+	unsigned long dispatch_dispersions = 0;
+
+	for_each_possible_cpu(cpu) {
+		dispatches += lppaca[cpu].yield_count;
+		dispatch_dispersions += lppaca[cpu].dispersion_count;
+	}
+
+	seq_printf(m, "dispatches=%lu\n", dispatches);
+	seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
+}
+
 static int pseries_lparcfg_data(struct seq_file *m, void *v)
 {
 	int partition_potential_processors;
@@ -460,6 +475,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
 		parse_ppp_data(m);
 		parse_mpp_data(m);
 		pseries_cmo_data(m);
+		splpar_dispatch_data(m);
 
 		seq_printf(m, "purr=%ld\n", get_purr());
 	} else {		/* non SPLPAR case */
-- 
cgit v1.2.2


From 856cc2f0bea673b5fcd1500533ee8ffd6c0749bd Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 31 Mar 2009 20:14:01 +0000
Subject: powerpc/pseries: Fix ibm,client-architecture comment

We specify a 64MB RMO, but the comment says 128MB.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/prom_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index df21f95b4b1e..2f0e64b53642 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -614,7 +614,7 @@ static unsigned char ibm_architecture_vec[] = {
 	W(0xffffffff),			/* virt_base */
 	W(0xffffffff),			/* virt_size */
 	W(0xffffffff),			/* load_base */
-	W(64),				/* 128MB min RMA */
+	W(64),				/* 64MB min RMA */
 	W(0xffffffff),			/* full client load */
 	0,				/* min RMA percentage of total RAM */
 	48,				/* max log_2(hash table size) */
-- 
cgit v1.2.2


From 7e875e9dc8af70d126fa632446e967327ac3fdda Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@neuling.org>
Date: Wed, 1 Apr 2009 18:02:42 +0000
Subject: powerpc: Disable VSX or current process in giveup_fpu/altivec

When we call giveup_fpu, we need to need to turn off VSX for the
current process.  If we don't, on return to userspace it may execute a
VSX instruction before the next FP instruction, and not have its
register state refreshed correctly from the thread_struct.  Ditto for
altivec.

This caused a bug where an unaligned lfs or stfs results in
fix_alignment calling giveup_fpu so it can use the FPRs (in order to
do a single <-> double conversion), and then returning to userspace
with FP off but VSX on.  Then if a VSX instruction is executed, before
another FP instruction, it will proceed without another exception and
hence have the incorrect register state for VSX registers 0-31.

   lfs unaligned   <- alignment exception turns FP off but leaves VSX on

   VSX instruction <- no exception since VSX on, hence we get the
                      wrong VSX register values for VSX registers 0-31,
                      which overlap the FPRs.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/fpu.S     | 5 +++++
 arch/powerpc/kernel/misc_64.S | 8 ++++++++
 2 files changed, 13 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S
index a088c064ae40..2436df33c6f4 100644
--- a/arch/powerpc/kernel/fpu.S
+++ b/arch/powerpc/kernel/fpu.S
@@ -145,6 +145,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
 	beq	1f
 	PPC_LL	r4,_MSR-STACK_FRAME_OVERHEAD(r5)
 	li	r3,MSR_FP|MSR_FE0|MSR_FE1
+#ifdef CONFIG_VSX
+BEGIN_FTR_SECTION
+	oris	r3,r3,MSR_VSX@h
+END_FTR_SECTION_IFSET(CPU_FTR_VSX)
+#endif
 	andc	r4,r4,r3		/* disable FP for previous task */
 	PPC_STL	r4,_MSR-STACK_FRAME_OVERHEAD(r5)
 1:
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 3053fe5c62f2..b9530b2395a2 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -495,7 +495,15 @@ _GLOBAL(giveup_altivec)
 	stvx	vr0,r4,r3
 	beq	1f
 	ld	r4,_MSR-STACK_FRAME_OVERHEAD(r5)
+#ifdef CONFIG_VSX
+BEGIN_FTR_SECTION
+	lis	r3,(MSR_VEC|MSR_VSX)@h
+FTR_SECTION_ELSE
+	lis	r3,MSR_VEC@h
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_VSX)
+#else
 	lis	r3,MSR_VEC@h
+#endif
 	andc	r4,r4,r3		/* disable FP for previous task */
 	std	r4,_MSR-STACK_FRAME_OVERHEAD(r5)
 1:
-- 
cgit v1.2.2


From c7d07fdd5af084bbd0a7921f9b07037b9bc8829d Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Sun, 5 Apr 2009 16:05:02 +0000
Subject: powerpc: Print information about mapping hw irqs to virtual irqs

The irq remapping layer seems to cause some confusion when people
see a different irq number in /proc/interrupts vs the one they
request in their driver or DTS.

So have the irq remapping layer print out a message when we map an
irq. The message is only printed the first time the irq is mapped,
and it's KERN_DEBUG so most people won't see it.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/irq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 5576147e57b6..8c1a4966867e 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -672,11 +672,13 @@ unsigned int irq_create_mapping(struct irq_host *host,
 			return NO_IRQ;
 		}
 	}
-	pr_debug("irq: -> obtained virq %d\n", virq);
 
 	if (irq_setup_virq(host, virq, hwirq))
 		return NO_IRQ;
 
+	printk(KERN_DEBUG "irq: irq %lu on host %s mapped to virtual irq %u\n",
+		hwirq, host->of_node ? host->of_node->full_name : "null", virq);
+
 	return virq;
 }
 EXPORT_SYMBOL_GPL(irq_create_mapping);
-- 
cgit v1.2.2


From bc826666e4252f78d2b144af3b7d699ff5efce0a Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@neuling.org>
Date: Sun, 5 Apr 2009 20:59:39 +0000
Subject: powerpc: Fix ptrace compat wrapper for FPU register access

The ptrace compat wrapper mishandles access to the fpu registers.  The
PTRACE_PEEKUSR and PTRACE_POKEUSR requests miscalculate the index into
the fpr array due to the broken FPINDEX macro.  The
PPC_PTRACE_PEEKUSR_3264 request needs to use the same formula that the
native ptrace interface uses when operating on the register number (as
opposed to the 4-byte offset).  The PPC_PTRACE_POKEUSR_3264 request
didn't take TS_FPRWIDTH into account.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/ptrace32.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c
index 197d49c790ad..297632cba047 100644
--- a/arch/powerpc/kernel/ptrace32.c
+++ b/arch/powerpc/kernel/ptrace32.c
@@ -67,7 +67,8 @@ static long compat_ptrace_old(struct task_struct *child, long request,
 /* Macros to workout the correct index for the FPR in the thread struct */
 #define FPRNUMBER(i) (((i) - PT_FPR0) >> 1)
 #define FPRHALF(i) (((i) - PT_FPR0) & 1)
-#define FPRINDEX(i) TS_FPRWIDTH * FPRNUMBER(i) + FPRHALF(i)
+#define FPRINDEX(i) TS_FPRWIDTH * FPRNUMBER(i) * 2 + FPRHALF(i)
+#define FPRINDEX_3264(i) (TS_FPRWIDTH * ((i) - PT_FPR0))
 
 long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 			compat_ulong_t caddr, compat_ulong_t cdata)
@@ -168,8 +169,9 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 		CHECK_FULL_REGS(child->thread.regs);
 		if (numReg >= PT_FPR0) {
 			flush_fp_to_thread(child);
-			tmp = ((unsigned long int *)child->thread.fpr)
-				[FPRINDEX(numReg)];
+			/* get 64 bit FPR */
+			tmp = ((u64 *)child->thread.fpr)
+				[FPRINDEX_3264(numReg)];
 		} else { /* register within PT_REGS struct */
 			tmp = ptrace_get_reg(child, numReg);
 		} 
@@ -262,8 +264,13 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 				freg = (freg & 0xfffffffful) | (data << 32);
 			ret = ptrace_put_reg(child, numReg, freg);
 		} else {
+			u64 *tmp;
 			flush_fp_to_thread(child);
-			((unsigned int *)child->thread.regs)[index] = data;
+			/* get 64 bit FPR ... */
+			tmp = &(((u64 *)child->thread.fpr)
+				[FPRINDEX_3264(numReg)]);
+			/* ... write the 32 bit part we want */
+			((u32 *)tmp)[index % 2] = data;
 			ret = 0;
 		}
 		break;
-- 
cgit v1.2.2


From f4952f6cbeb025bc90906b740dc495f4817266d6 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Mon, 6 Apr 2009 04:40:45 +0000
Subject: powerpc/ftrace: Fix #if that should be #ifdef

Commit bb7253403f7a4670a128e4c080fd8ea1bd4d5029 ("powerpc64,
ftrace: save toc only on modules for function graph"), added an
#if CONFIG_PPC64.  This changes it to #ifdef.

Fixes the following warning on 32-bit builds:
 arch/powerpc/kernel/ftrace.c:562:5: error: "CONFIG_PPC64" is not defined

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 5455943f16aa..c2b90a941f77 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -564,7 +564,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
 	if (unlikely(atomic_read(&current->tracing_graph_pause)))
 		return;
 
-#if CONFIG_PPC64
+#ifdef CONFIG_PPC64
 	/* non core kernel code needs to save and restore the TOC */
 	if (REGION_ID(self_addr) != KERNEL_REGION_ID)
 		return_hooker = (unsigned long)&mod_return_to_handler;
-- 
cgit v1.2.2


From 7ddb7ad11f862f46d6d55d629a6fb45a5f4cb030 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Mon, 6 Apr 2009 04:40:46 +0000
Subject: powerpc/ftrace: Fix printf format warning
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

'tramp' is an unsigned long, so print it with %lx.

Fixes the following build warning:
arch/powerpc/kernel/ftrace.c:291: error: format ‘%x’ expects type ‘unsigned int’, but argument 2 has type ‘long unsigned int’

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/kernel/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index c2b90a941f77..70e2a736be1f 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -293,7 +293,7 @@ __ftrace_make_nop(struct module *mod,
 	if (tramp & 0x8000)
 		tramp -= 0x10000;
 
-	pr_debug(" %x ", tramp);
+	pr_debug(" %lx ", tramp);
 
 	if (tramp != addr) {
 		printk(KERN_ERR
-- 
cgit v1.2.2


From 284901a90a9e0b812ca3f5f852cbbfb60d10249d Mon Sep 17 00:00:00 2001
From: Yang Hongyang <yanghy@cn.fujitsu.com>
Date: Mon, 6 Apr 2009 19:01:15 -0700
Subject: dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)

Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/powerpc/kernel/dma.c         | 2 +-
 arch/powerpc/kernel/of_platform.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index 1c5c8a6fc129..53c7788cba78 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -94,7 +94,7 @@ static int dma_direct_dma_supported(struct device *dev, u64 mask)
 	 * done via some global so platforms can set the limit in case
 	 * they have limited DMA windows
 	 */
-	return mask >= DMA_32BIT_MASK;
+	return mask >= DMA_BIT_MASK(32);
 #else
 	return 1;
 #endif
diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c
index 3f37a6e62771..87df428e3588 100644
--- a/arch/powerpc/kernel/of_platform.c
+++ b/arch/powerpc/kernel/of_platform.c
@@ -76,7 +76,7 @@ struct of_device* of_platform_device_create(struct device_node *np,
 		return NULL;
 
 	dev->dma_mask = 0xffffffffUL;
-	dev->dev.coherent_dma_mask = DMA_32BIT_MASK;
+	dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 
 	dev->dev.bus = &of_platform_bus_type;
 
-- 
cgit v1.2.2