Commit 09cf5bcb authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman

powerpc/mm/radix: Update PID switch sequence

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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 4b7a3504
...@@ -181,6 +181,7 @@ ...@@ -181,6 +181,7 @@
#define PPC_INST_MTSPR_DSCR_USER 0x7c0303a6 #define PPC_INST_MTSPR_DSCR_USER 0x7c0303a6
#define PPC_INST_MTSPR_DSCR_USER_MASK 0xfc1fffff #define PPC_INST_MTSPR_DSCR_USER_MASK 0xfc1fffff
#define PPC_INST_SLBFEE 0x7c0007a7 #define PPC_INST_SLBFEE 0x7c0007a7
#define PPC_INST_SLBIA 0x7c0003e4
#define PPC_INST_STRING 0x7c00042a #define PPC_INST_STRING 0x7c00042a
#define PPC_INST_STRING_MASK 0xfc0007fe #define PPC_INST_STRING_MASK 0xfc0007fe
...@@ -442,5 +443,7 @@ ...@@ -442,5 +443,7 @@
___PPC_RA(a) | \ ___PPC_RA(a) | \
___PPC_RB(b)) ___PPC_RB(b))
#define PPC_SLBIA(IH) stringify_in_c(.long PPC_INST_SLBIA | \
((IH & 0x7) << 21))
#endif /* _ASM_POWERPC_PPC_OPCODE_H */ #endif /* _ASM_POWERPC_PPC_OPCODE_H */
...@@ -181,7 +181,10 @@ void destroy_context(struct mm_struct *mm) ...@@ -181,7 +181,10 @@ void destroy_context(struct mm_struct *mm)
#ifdef CONFIG_PPC_RADIX_MMU #ifdef CONFIG_PPC_RADIX_MMU
void radix__switch_mmu_context(struct mm_struct *prev, struct mm_struct *next) void radix__switch_mmu_context(struct mm_struct *prev, struct mm_struct *next)
{ {
mtspr(SPRN_PID, next->context.id);
asm volatile("isync": : :"memory"); asm volatile("isync": : :"memory");
mtspr(SPRN_PID, next->context.id);
asm volatile("isync \n"
PPC_SLBIA(0x7)
: : :"memory");
} }
#endif #endif
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