8 files changed, 17 insertions, 40 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 8a54eb8e3768..2e19500921f9 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -313,19 +313,6 @@ config 8XX_MINIMAL_FPEMU
 
           It is recommended that you build a soft-float userspace instead.
 
-config IOMMU_VMERGE
-        bool "Enable IOMMU virtual merging"
-        depends on PPC64
-        default y
-        help
-          Cause IO segments sent to a device for DMA to be merged virtually
-          by the IOMMU when they happen to have been allocated contiguously.
-          This doesn't add pressure to the IOMMU allocator. However, some
-          drivers don't support getting large merged segments coming back
-          from *_map_sg().
-
-          Most drivers don't have this problem; it is safe to say Y here.
-
 config IOMMU_HELPER
         def_bool PPC64
 
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index aea714797590..d553bbeb726c 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -25,7 +25,7 @@
 #define PPC_INST_LDARX                  0x7c0000a8
 #define PPC_INST_LSWI                   0x7c0004aa
 #define PPC_INST_LSWX                   0x7c00042a
-#define PPC_INST_LWARX                  0x7c000029
+#define PPC_INST_LWARX                  0x7c000028
 #define PPC_INST_LWSYNC                 0x7c2004ac
 #define PPC_INST_LXVD2X                 0x7c000698
 #define PPC_INST_MCRXR                  0x7c000400
@@ -62,8 +62,8 @@
 #define __PPC_T_TLB(t)  (((t) & 0x3) << 21)
 #define __PPC_WC(w)     (((w) & 0x3) << 21)
 /*
- * Only use the larx hint bit on 64bit CPUs. Once we verify it doesn't have
- * any side effects on all 32bit processors, we can do this all the time.
+ * Only use the larx hint bit on 64bit CPUs. e500v1/v2 based CPUs will treat a
+ * larx with EH set as an illegal instruction.
  */
 #ifdef CONFIG_PPC64
 #define __PPC_EH(eh)    (((eh) & 0x1) << 0)
diff --git a/arch/powerpc/include/asm/syscall.h b/arch/powerpc/include/asm/syscall.h
index efa7f0b879f3..23913e902fc3 100644
--- a/arch/powerpc/include/asm/syscall.h
+++ b/arch/powerpc/include/asm/syscall.h
@@ -30,7 +30,7 @@ static inline void syscall_rollback(struct task_struct *task,
 static inline long syscall_get_error(struct task_struct *task,
                                      struct pt_regs *regs)
 {
-        return (regs->ccr & 0x1000) ? -regs->gpr[3] : 0;
+        return (regs->ccr & 0x10000000) ? -regs->gpr[3] : 0;
 }
 
 static inline long syscall_get_return_value(struct task_struct *task,
@@ -44,10 +44,10 @@ static inline void syscall_set_return_value(struct task_struct *task,
                                             int error, long val)
 {
         if (error) {
-                regs->ccr |= 0x1000L;
+                regs->ccr |= 0x10000000L;
                 regs->gpr[3] = -error;
         } else {
-                regs->ccr &= ~0x1000L;
+                regs->ccr &= ~0x10000000L;
                 regs->gpr[3] = val;
         }
 }
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 25793bb0e782..725526547994 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -747,9 +747,6 @@ finish_tlb_load:
 #else
         rlwimi  r12, r11, 26, 27, 31    /* extract WIMGE from pte */
 #endif
-#ifdef CONFIG_SMP
-        ori     r12, r12, MAS2_M
-#endif
         mtspr   SPRN_MAS2, r12
 
 #ifdef CONFIG_PTE_64BIT
@@ -887,13 +884,17 @@ KernelSPE:
         lwz     r3,_MSR(r1)
         oris    r3,r3,MSR_SPE@h
         stw     r3,_MSR(r1)     /* enable use of SPE after return */
+#ifdef CONFIG_PRINTK
         lis     r3,87f@h
         ori     r3,r3,87f@l
         mr      r4,r2           /* current */
         lwz     r5,_NIP(r1)
         bl      printk
+#endif
         b       ret_from_except
+#ifdef CONFIG_PRINTK
 87:     .string "SPE used in kernel  (task=%p, pc=%x)  \n"
+#endif
         .align  4,0
 
 #endif /* CONFIG_SPE */
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 5547ae6e6b0b..ec94f906ea43 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -42,12 +42,7 @@
 
 #define DBG(...)
 
-#ifdef CONFIG_IOMMU_VMERGE
-static int novmerge = 0;
-#else
-static int novmerge = 1;
-#endif
-
+static int novmerge;
 static int protect4gb = 1;
 
 static void __iommu_free(struct iommu_table *, dma_addr_t, unsigned int);
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index b152de3e64d4..8f58986c2ad9 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -39,7 +39,6 @@
 #include <asm/serial.h>
 #include <asm/udbg.h>
 #include <asm/mmu_context.h>
-#include <asm/swiotlb.h>
 
 #include "setup.h"
 
@@ -343,11 +342,6 @@ void __init setup_arch(char **cmdline_p)
                 ppc_md.setup_arch();
         if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
 
-#ifdef CONFIG_SWIOTLB
-        if (ppc_swiotlb_enable)
-                swiotlb_init(1);
-#endif
-
         paging_init();
 
         /* Initialize the MMU context management stuff */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 63547394048c..914389158a9b 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -61,7 +61,6 @@
 #include <asm/xmon.h>
 #include <asm/udbg.h>
 #include <asm/kexec.h>
-#include <asm/swiotlb.h>
 #include <asm/mmu_context.h>
 
 #include "setup.h"
@@ -541,11 +540,6 @@ void __init setup_arch(char **cmdline_p)
         if (ppc_md.setup_arch)
                 ppc_md.setup_arch();
 
-#ifdef CONFIG_SWIOTLB
-        if (ppc_swiotlb_enable)
-                swiotlb_init(1);
-#endif
-
         paging_init();
 
         /* Initialize the MMU context management stuff */
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 311224cdb7ad..448f972b22f5 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -48,6 +48,7 @@
 #include <asm/sparsemem.h>
 #include <asm/vdso.h>
 #include <asm/fixmap.h>
+#include <asm/swiotlb.h>
 
 #include "mmu_decl.h"
 
@@ -320,6 +321,11 @@ void __init mem_init(void)
         struct page *page;
         unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
 
+#ifdef CONFIG_SWIOTLB
+        if (ppc_swiotlb_enable)
+                swiotlb_init(1);
+#endif
+
         num_physpages = lmb.memory.size >> PAGE_SHIFT;
         high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);