[PATCH for-4.8 08/12] powerpc/mm/radix: Update PID switch sequence
STALE3733d
From: Aneesh Kumar K.V <hidden>
Date: 2016-07-13 09:36:22
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Update the PID switch as per ISA doc. slbia is needed in radix to
invalidate any implementation specific lookaside information.
We use the .long format due to build errors with the below compiler
version.
gcc (Ubuntu 5.3.1-14ubuntu2.1) 5.3.1 20160413
GNU assembler (GNU Binutils for Ubuntu) 2.26
CC arch/powerpc/mm//mmu_context_book3s64.o
{standard input}: Assembler messages:
{standard input}:506: Error: junk at end of line: `0x7'
scripts/Makefile.build:291: recipe for target 'arch/powerpc/mm//mmu_context_book3s64.o' failed
make[1]: *** [arch/powerpc/mm//mmu_context_book3s64.o] Error 1
Signed-off-by: Aneesh Kumar K.V <redacted>
---
arch/powerpc/include/asm/ppc-opcode.h | 3 +++
arch/powerpc/mm/mmu_context_book3s64.c | 5 ++++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 1c9b1d4386ba..27b81302fb36 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h@@ -181,6 +181,7 @@ #define PPC_INST_MTSPR_DSCR_USER 0x7c0303a6 #define PPC_INST_MTSPR_DSCR_USER_MASK 0xfc1fffff #define PPC_INST_SLBFEE 0x7c0007a7 +#define PPC_INST_SLBIA 0x7c0003e4 #define PPC_INST_STRING 0x7c00042a #define PPC_INST_STRING_MASK 0xfc0007fe
@@ -438,5 +439,7 @@ ___PPC_RA(a) | \ ___PPC_RB(b)) +#define PPC_SLBIA(IH) stringify_in_c(.long PPC_INST_SLBIA | \ + ((IH & 0x7) << 21)) #endif /* _ASM_POWERPC_PPC_OPCODE_H */
diff --git a/arch/powerpc/mm/mmu_context_book3s64.c b/arch/powerpc/mm/mmu_context_book3s64.c
index 196222227e82..b114f8b93ec9 100644
--- a/arch/powerpc/mm/mmu_context_book3s64.c
+++ b/arch/powerpc/mm/mmu_context_book3s64.c@@ -181,7 +181,10 @@ void destroy_context(struct mm_struct *mm) #ifdef CONFIG_PPC_RADIX_MMU void radix__switch_mmu_context(struct mm_struct *prev, struct mm_struct *next) { - mtspr(SPRN_PID, next->context.id); asm volatile("isync": : :"memory"); + mtspr(SPRN_PID, next->context.id); + asm volatile("isync \n" + PPC_SLBIA(0x7) + : : :"memory"); } #endif
--
2.7.4