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powerpc/mm/radix: Update PID switch sequence

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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 <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V
2016-07-13 15:05:27 +05:30
committed by Michael Ellerman
parent 4b7a350480
commit 09cf5bcb0c
2 changed files with 7 additions and 1 deletions
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5
arch/powerpc/mm/mmu_context_book3s64.c
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@@ -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