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* Merge branch 'merge' into nextBenjamin Herrenschmidt2013-12-29
|\ | | | | | | | | | | | | Merge a pile of fixes that went into the "merge" branch (3.13-rc's) such as Anton Little Endian fixes. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * Merge remote-tracking branch 'agust/merge' into mergeBenjamin Herrenschmidt2013-12-29
| |\ | | | | | | | | | | | | | | | | | | Anatolij writes: Please pull two DTS fixes for MPC5125 tower board. Without them the v3.13-rcX kernels do not boot.
| | * powerpc/512x: dts: disable MPC5125 usb moduleMatteo Facchinetti2013-12-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At the moment the USB controller's pin muxing is not setup correctly and causes a kernel panic upon system startup, so disable the USB1 device tree node in the MPC5125 tower board dts file. The USB controller is connected to an USB3320 ULPI transceiver and the device tree should receive an update to reflect correct dependencies and required initialization data before the USB1 node can get re-enabled. Signed-off-by: Matteo Facchinetti <matteo.facchinetti@sirius-es.it> Signed-off-by: Anatolij Gustschin <agust@denx.de>
| | * powerpc/512x: dts: remove misplaced IRQ spec from 'soc' node (5125)Gerhard Sittig2013-12-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the 'soc' node in the MPC5125 "tower" board .dts has an '#interrupt-cells' property although this node is not an interrupt controller remove this erroneously placed property because starting with v3.13-rc1 lookup and resolution of 'interrupts' specs for peripherals gets misled (tries to use the 'soc' as the interrupt parent which fails), emits 'no irq domain found' WARN() messages and breaks the boot process [ best viewed with 'git diff -U5' to have DT node names in the context ] Cc: Anatolij Gustschin <agust@denx.de> Cc: linuxppc-dev@lists.ozlabs.org Cc: devicetree@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
| * | powerpc: Fix alignment of secondary cpu spin varsOlof Johansson2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 5c0484e25ec0 ('powerpc: Endian safe trampoline') resulted in losing proper alignment of the spinlock variables used when booting secondary CPUs, causing some quite odd issues with failing to boot on PA Semi-based systems. This showed itself on ppc64_defconfig, but not on pasemi_defconfig, so it had gone unnoticed when I initially tested the LE patch set. Fix is to add explicit alignment instead of relying on good luck. :) [ It appears that there is a different issue with PA Semi systems however this fix is definitely correct so applying anyway -- BenH ] Fixes: 5c0484e25ec0 ('powerpc: Endian safe trampoline') Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=67811 Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Align p_endAnton Blanchard2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | p_end is an 8 byte value embedded in the text section. This means it is only 4 byte aligned when it should be 8 byte aligned. Fix this by adding an explicit alignment. This fixes an issue where POWER7 little endian builds with CONFIG_RELOCATABLE=y fail to boot. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powernv/eeh: Add buffer for P7IOC hub error dataBrian W Hart2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prevent ioda_eeh_hub_diag() from clobbering itself when called by supplying a per-PHB buffer for P7IOC hub diagnostic data. Take care to inform OPAL of the correct size for the buffer. [Small style change to the use of sizeof -- BenH] Signed-off-by: Brian W Hart <hartb@linux.vnet.ibm.com> Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powernv/eeh: Fix possible buffer overrun in ioda_eeh_phb_diag()Brian W Hart2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | PHB diagnostic buffer may be smaller than PAGE_SIZE, especially when PAGE_SIZE > 4KB. Signed-off-by: Brian W Hart <hartb@linux.vnet.ibm.com> Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Make 64-bit non-VMX __copy_tofrom_user bi-endianPaul E. McKenney2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The powerpc 64-bit __copy_tofrom_user() function uses shifts to handle unaligned invocations. However, these shifts were designed for big-endian systems: On little-endian systems, they must shift in the opposite direction. This commit relies on the C preprocessor to insert the correct shifts into the assembly code. [ This is a rare but nasty LE issue. Most of the time we use the POWER7 optimised __copy_tofrom_user_power7 loop, but when it hits an exception we fall back to the base __copy_tofrom_user loop. - Anton ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Make unaligned accesses endian-safe for powerpcRajesh B Prathipati2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The generic put_unaligned/get_unaligned macros were made endian-safe by calling the appropriate endian dependent macros based on the endian type of the powerpc processor. Signed-off-by: Rajesh B Prathipati <rprathip@linux.vnet.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Fix bad stack check in exception entryMichael Neuling2013-12-29
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In EXCEPTION_PROLOG_COMMON() we check to see if the stack pointer (r1) is valid when coming from the kernel. If it's not valid, we die but with a nice oops message. Currently we allocate a stack frame (subtract INT_FRAME_SIZE) before we check to see if the stack pointer is negative. Unfortunately, this won't detect a bad stack where r1 is less than INT_FRAME_SIZE. This patch fixes the check to compare the modified r1 with -INT_FRAME_SIZE. With this, bad kernel stack pointers (including NULL pointers) are correctly detected again. Kudos to Paulus for finding this. Signed-off-by: Michael Neuling <mikey@neuling.org> cc: stable@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Fix OPAL LPC access in Little EndianBenjamin Herrenschmidt2013-12-12
| | | | | | | | | | | | | | We are passing pointers to the firmware for reads, we need to properly convert the result as OPAL is always BE. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Fix endian issue in opal_xscom_readAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | opal_xscom_read uses a pointer to return the data so we need to byteswap it on LE builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix endian issues in crash dump codeAnton Blanchard2013-12-12
| | | | | | | | | | | | | | A couple more device tree properties that need byte swapping. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix endian issues in MSI codeAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | The MSI code is miscalculating quotas in little endian mode. Add required byteswaps to fix this. Before we claimed a quota of 65536, after the patch we see the correct value of 256. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix PCIE link speed endian issueAnton Blanchard2013-12-12
| | | | | | | | | | | | | | We need to byteswap ibm,pcie-link-speed-stats. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix endian issues in nvram codeAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The NVRAM code has a number of endian issues. I noticed a very confused error log count: RTAS: 100663330 -------- RTAS event begin -------- 100663330 == 0x06000022. 0x6 LE error logs and 0x22 BE error logs. The pstore code has similar issues - if we write an oops in one endian and attempt to read it in another we get junk. Make both of these formats big endian, and byteswap as required. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Fix endian issues in /proc/ppc64/lparcfgAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | Some obvious issues: cat /proc/ppc64/lparcfg ... partition_id=16777216 ... partition_potential_processors=268435456 Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix topology core_id endian issue on LE buildsAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | cpu_to_core_id() is missing a byteswap: cat /sys/devices/system/cpu/cpu63/topology/core_id 201326592 Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix endian issue in setup-common.cAnton Blanchard2013-12-12
| | | | | | | | | | | | | | | | | | | | | | During on LE boot we see: Partition configured for 1073741824 cpus, operating system maximum is 2048. Clearly missing a byteswap here. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: PTRACE_PEEKUSR always returns FPR0Ulrich Weigand2013-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a bug in using ptrace to access FPRs via PTRACE_PEEKUSR / PTRACE_POKEUSR. In effect, trying to access any of the FPRs always really accesses FPR0, which does seriously break debugging :-) The problem seems to have been introduced by commit 3ad26e5c4459d (Merge branch 'for-kvm' into next). [ It is indeed a merge conflict between Paul's FPU/VSX state rework and my LE patches - Anton ] Signed-off-by: Ulrich Weigand <Ulrich.Weigand@de.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix up the kdump base cap to 128MMahesh Salgaonkar2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current logic sets the kdump base to min of 2G or ppc64_rma_size/2. On PowerNV kernel the first memory block 'memory@0' can be very large, equal to the DIMM size with ppc64_rma_size value capped to 1G. Hence on PowerNV, kdump base is set to 512M resulting kdump to fail while allocating paca array. This is because, paca need its memory from RMA region capped at 256M (see allocate_pacas()). This patch lowers the kdump base cap to 128M so that kdump kernel can successfully get memory below 256M for paca allocation. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powernv: Fix VFIO support with PHB3Thadeu Lima de Souza Cascardo2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | I have recently found out that no iommu_groups could be found under /sys/ on a P8. That prevents PCI passthrough from working. During my investigation, I found out there seems to be a missing iommu_register_group for PHB3. The following patch seems to fix the problem. After applying it, I see iommu_groups under /sys/kernel/iommu_groups/, and can also bind vfio-pci to an adapter, which gives me a device at /dev/vfio/. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/52xx: Re-enable bestcomm driver in defconfigsAnatolij Gustschin2013-12-09
| | | | | | | | | | | | | | | | | | | | The bestcomm driver has been moved to drivers/dma, so to select this driver by default additionally CONFIG_DMADEVICES has to be enabled. Currently it is not enabled in the config despite existing CONFIG_PPC_BESTCOMM=y in the config files. Fix it. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pasemi: Turn on devtmpfs in defconfigOlof Johansson2013-12-09
| | | | | | | | | | | | | | | | At least some distros expect it these days; turn it on. Also, random churn from doing a savedefconfig for the first time in a year or so. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix PTE page address mismatch in pgtable ctor/dtorHong H. Pham2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In pte_alloc_one(), pgtable_page_ctor() is passed an address that has not been converted by page_address() to the newly allocated PTE page. When the PTE is freed, __pte_free_tlb() calls pgtable_page_dtor() with an address to the PTE page that has been converted by page_address(). The mismatch in the PTE's page address causes pgtable_page_dtor() to access invalid memory, so resources for that PTE (such as the page lock) is not properly cleaned up. On PPC32, only SMP kernels are affected. On PPC64, only SMP kernels with 4K page size are affected. This bug was introduced by commit d614bb041209fd7cb5e4b35e11a7b2f6ee8f62b8 "powerpc: Move the pte free routines from common header". On a preempt-rt kernel, a spinlock is dynamically allocated for each PTE in pgtable_page_ctor(). When the PTE is freed, calling pgtable_page_dtor() with a mismatched page address causes a memory leak, as the pointer to the PTE's spinlock is bogus. On mainline, there isn't any immediately obvious symptoms, but the problem still exists here. Fixes: d614bb041209fd7c "powerpc: Move the pte free routes from common header" Cc: Paul Mackerras <paulus@samba.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linux-stable <stable@vger.kernel.org> # v3.10+ Signed-off-by: Hong H. Pham <hong.pham@windriver.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/44x: Fix ocm_block allocationIlia Mirkin2013-12-09
| | | | | | | | | | | | | | | | Allocate enough memory for the ocm_block structure, not just a pointer to it. Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix build break with PPC_EARLY_DEBUG_BOOTX=yMichael Ellerman2013-12-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | A kernel configured with PPC_EARLY_DEBUG_BOOTX=y but PPC_PMAC=n and PPC_MAPLE=n will fail to link: btext.c:(.text+0x2d0fc): undefined reference to `.rmci_off' btext.c:(.text+0x2d214): undefined reference to `.rmci_on' Fix it by making the build of rmci_on/off() depend on PPC_EARLY_DEBUG_BOOTX, which also enable the only code that uses them. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/512x: dts: remove misplaced IRQ spec from 'soc' nodeGerhard Sittig2013-12-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the 'soc' node in the common .dtsi for MPC5121 has an '#interrupt-cells' property although this node is not an interrupt controller remove this erroneously placed property because starting with v3.13-rc1 lookup and resolution of 'interrupts' specs for peripherals gets misled, emits 'no irq domain found' WARN() messages and breaks the boot process irq: no irq domain found for /soc@80000000 ! ------------[ cut here ]------------ WARNING: at drivers/of/platform.c:171 Modules linked in: CPU: 0 PID: 1 Comm: swapper Tainted: G W 3.13.0-rc1-00001-g8a66234 #8 task: df823bb0 ti: df834000 task.ti: df834000 NIP: c02b5190 LR: c02b5180 CTR: c01cf4e0 REGS: df835c50 TRAP: 0700 Tainted: G W (3.13.0-rc1-00001-g8a66234) MSR: 00029032 <EE,ME,IR,DR,RI> CR: 229a9d42 XER: 20000000 GPR00: c02b5180 df835d00 df823bb0 00000000 00000000 df835b18 ffffffff 00000308 GPR08: c0479cc0 c0480000 c0479cc0 00000308 00000308 00000000 c00040fc 00000000 GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 df850880 GPR24: df84d670 00000000 00000001 df8561a0 dffffccc df85089c 00000020 00000001 NIP [c02b5190] of_device_alloc+0xf4/0x1a0 LR [c02b5180] of_device_alloc+0xe4/0x1a0 Call Trace: [df835d00] [c02b5180] of_device_alloc+0xe4/0x1a0 (unreliable) [df835d50] [c02b5278] of_platform_device_create_pdata+0x3c/0xc8 [df835d70] [c02b53fc] of_platform_bus_create+0xf8/0x170 [df835dc0] [c02b5448] of_platform_bus_create+0x144/0x170 [df835e10] [c02b55a8] of_platform_bus_probe+0x98/0xe8 [df835e30] [c0437508] mpc512x_init+0x28/0x1c4 [df835e70] [c0435de8] ppc_init+0x4c/0x60 [df835e80] [c0003b28] do_one_initcall+0x150/0x1a4 [df835ef0] [c0432048] kernel_init_freeable+0x114/0x1c0 [df835f30] [c0004114] kernel_init+0x18/0x124 [df835f40] [c000e910] ret_from_kernel_thread+0x5c/0x64 Instruction dump: 409effd4 57c9103a 57de2834 7c89f050 7f83e378 7c972214 7f45d378 48001f55 7c63d278 7c630034 5463d97e 687a0001 <0f1a0000> 2f990000 387b0010 939b0098 ---[ end trace 2257f10e5a20cbdd ]--- ... irq: no irq domain found for /soc@80000000 ! fsl-diu-fb 80002100.display: could not get DIU IRQ fsl-diu-fb: probe of 80002100.display failed with error -22 irq: no irq domain found for /soc@80000000 ! mpc512x_dma 80014000.dma: Error mapping IRQ! mpc512x_dma: probe of 80014000.dma failed with error -22 ... irq: no irq domain found for /soc@80000000 ! fs_enet: probe of 80002800.ethernet failed with error -22 ... irq: no irq domain found for /soc@80000000 ! mpc5121-rtc 80000a00.rtc: mpc5121_rtc_probe: could not request irq: 0 mpc5121-rtc: probe of 80000a00.rtc failed with error -22 ... Cc: Anatolij Gustschin <agust@denx.de> Cc: linuxppc-dev@lists.ozlabs.org Cc: devicetree@vger.kernel.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
* | powerpc: Fix endian issues in power7/8 machine check handlerAnton Blanchard2013-12-29
| | | | | | | | | | | | | | | | The SLB save area is shared with the hypervisor and is defined as big endian, so we need to byte swap on little endian builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/iommu: Update the generic code to use dynamic iommu page sizesAlistair Popple2013-12-29
| | | | | | | | | | | | | | | | | | This patch updates the generic iommu backend code to use the it_page_shift field to determine the iommu page size instead of using hardcoded values. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/iommu: Add it_page_shift field to determine iommu page sizeAlistair Popple2013-12-29
| | | | | | | | | | | | | | | | This patch adds a it_page_shift field to struct iommu_table and initiliases it to 4K for all platforms. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/iommu: Update constant names to reflect their hardcoded page sizeAlistair Popple2013-12-29
| | | | | | | | | | | | | | | | | | | | | | The powerpc iommu uses a hardcoded page size of 4K. This patch changes the name of the IOMMU_PAGE_* macros to reflect the hardcoded values. A future patch will use the existing names to support dynamic page sizes. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Remove unused REDBOOT Kconfig parameterMichael Opdenacker2013-12-29
| | | | | | | | | | | | | | | | | | This removes the REDBOOT Kconfig parameter, which was no longer used anywhere in the source code and Makefiles. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Fix "attempt to move .org backwards" errorMahesh Salgaonkar2013-12-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With recent machine check patch series changes, The exception vectors starting from 0x4300 are now overflowing with allyesconfig. Fix that by moving machine_check_common and machine_check_handle_early code out of that region to make enough room for exception vector area. Fixes this build error reportes by Stephen: arch/powerpc/kernel/exceptions-64s.S: Assembler messages: arch/powerpc/kernel/exceptions-64s.S:958: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:959: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:983: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:984: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:1003: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:1013: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:1014: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:1015: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:1016: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:1017: Error: attempt to move .org backwards arch/powerpc/kernel/exceptions-64s.S:1018: Error: attempt to move .org backwards [Moved the code further down as it introduced link errors due to too long relative branches to the masked interrupts handlers from the exception prologs. Also removed the useless feature section --BenH ] Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/powernv: Get FSP memory errors and plumb into memory poison ↵Mahesh Salgaonkar2013-12-08
| | | | | | | | | | | | | | | | | | | | | | infrastructure. Get the memory errors reported by opal and plumb it into memory poison infrastructure. This patch uses new messaging channel infrastructure to pull the fsp memory errors to linux. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/powernv: Add config option for hwpoisoning.Mahesh Salgaonkar2013-12-08
| | | | | | | | | | | | | | | | Add config option to enable generic memory hwpoisoning infrastructure for ppc64. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/mm: Enable _PAGE_NUMA for book3sAneesh Kumar K.V2013-12-08
| | | | | | | | | | | | | | | | We steal the _PAGE_COHERENCE bit and use that for indicating NUMA ptes. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/mm: Only check for _PAGE_PRESENT in set_pte/pmd functionsAneesh Kumar K.V2013-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | We want to make sure we don't use these function when updating a pte or pmd entry that have a valid hpte entry, because these functions don't invalidate them. So limit the check to _PAGE_PRESENT bit. Numafault core changes use these functions for updating _PAGE_NUMA bits. That should be ok because when _PAGE_NUMA is set we can be sure that hpte entries are not present. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/mm: Free up _PAGE_COHERENCE for numa fault use laterAneesh Kumar K.V2013-12-08
| | | | | | | | | | | | | | | | | | | | | | | | Set memory coherence always on hash64 config. If a platform cannot have memory coherence always set they can infer that from _PAGE_NO_CACHE and _PAGE_WRITETHRU like in lpar. So we dont' really need a separate bit for tracking _PAGE_COHERENCE. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/mm: Use HPTE constants when updating hpte bitsAneesh Kumar K.V2013-12-08
| | | | | | | | | | | | | | | | | | Even though we have same value for linux PTE bits and hash PTE pits use the hash pte bits wen updating hash pte Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Dynamically allocate slb_shadow from memblockJeremy Kerr2013-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the slb_shadow buffer is our largest symbol: [jk@pablo linux]$ nm --size-sort -r -S obj/vmlinux | head -1 c000000000da0000 0000000000040000 d slb_shadow - we allocate 128 bytes per cpu; so 256k with NR_CPUS=2048. As we have constant initialisers, it's allocated in .text, causing a larger vmlinux image. We may also allocate unecessary slb_shadow buffers (> no. pacas), since we use the build-time NR_CPUS rather than the run-time nr_cpu_ids. We could move this to the bss, but then we still have the NR_CPUS vs nr_cpu_ids potential for overallocation. This change dynamically allocates the slb_shadow array, during initialise_pacas(). At a cost of 104 bytes of text, we save 256k of data: [jk@pablo linux]$ size obj/vmlinux{.orig,} text data bss dec hex filename 9202795 5244676 1169576 15617047 ee4c17 obj/vmlinux.orig 9202899 4982532 1169576 15355007 ea4c7f obj/vmlinux Tested on pseries. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Make slb_shadow a localJeremy Kerr2013-12-08
| | | | | | | | | | | | | | | | The only external user of slb_shadow is the pseries lpar code, and it can access through the paca array instead. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/pci: Use dev_is_pci() to check whether it is pci deviceYijing Wang2013-12-08
| | | | | | | | | | | | | | | | Use PCI standard marco dev_is_pci() instead of directly compare pci_bus_type to check whether it is pci device. Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powernv: Remove get/set_rtc_time when they are not presentMichael Neuling2013-12-05
| | | | | | | | | | | | | | | | | | | | | | | | Currently we continue to poll get/set_rtc_time even when we know they are not working. This changes it so that if it fails at boot time we remove the ppc_md get/set_rtc_time hooks so that we don't end up polling known broken calls. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Add real mode cache inhibited IO accessorsMichael Ellerman2013-12-05
| | | | | | | | | | | | | | | | These accessors allow us to do cache inhibited accesses when in real mode. They should only be used in real mode. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Increase EEH recovery timeout for SR-IOVBrian King2013-12-05
| | | | | | | | | | | | | | | | | | | | | | | | | | In order to support concurrent adapter firmware download to SR-IOV adapters on pSeries, each VF will see an EEH event where the slot will remain in the unavailable state for the duration of the adapter firmware update, which can take as long as 5 minutes. Extend the EEH recovery timeout to account for this. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/eeh: Output PHB diag-dataGavin Shan2013-12-05
| | | | | | | | | | | | | | | | | | | | | | When hitting frozen PE or fenced PHB, it's always indicative to have dumped PHB diag-data for further analysis and diagnosis. However, we never dump that for the cases. The patch intends to dump PHB diag-data at the backend of eeh_ops::get_log() for PowerNV platform. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/powernv: Move PHB-diag dump functions aroundGavin Shan2013-12-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prior to the completion of PCI enumeration, we actively detects EEH errors on PCI config cycles and dump PHB diag-data if necessary. The EEH backend also dumps PHB diag-data in case of frozen PE or fenced PHB. However, we are using different functions to dump the PHB diag-data for those 2 cases. The patch merges the functions for dumping PHB diag-data to one so that we can avoid duplicate code. Also, we never dump PHB3 diag-data during PCI config cycles with frozen PE. The patch fixes it as well. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | PPC: POWERNV: move iommu_add_device earlierAlexey Kardashevskiy2013-12-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current implementation of IOMMU on sPAPR does not use iommu_ops and therefore does not call IOMMU API's bus_set_iommu() which 1) sets iommu_ops for a bus 2) registers a bus notifier Instead, PCI devices are added to IOMMU groups from subsys_initcall_sync(tce_iommu_init) which does basically the same thing without using iommu_ops callbacks. However Freescale PAMU driver (https://lkml.org/lkml/2013/7/1/158) implements iommu_ops and when tce_iommu_init is called, every PCI device is already added to some group so there is a conflict. This patch does 2 things: 1. removes the loop in which PCI devices were added to groups and adds explicit iommu_add_device() calls to add devices as soon as they get the iommu_table pointer assigned to them. 2. moves a bus notifier to powernv code in order to avoid conflict with the notifier from Freescale driver. iommu_add_device() and iommu_del_device() are public now. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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