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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2010-03-05 10:43:24 +0000 |
|---|---|---|
| committer | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2010-05-05 10:39:13 -0400 |
| commit | 221c185d4e11b4061409da5d592779ced484614c (patch) | |
| tree | be1cd256f8f1dee8439409e32ddde6b924e05425 | |
| parent | fc5e709731429bc2db27897630e7c0089f297680 (diff) | |
| download | linux-stable-221c185d4e11b4061409da5d592779ced484614c.tar.gz linux-stable-221c185d4e11b4061409da5d592779ced484614c.tar.bz2 linux-stable-221c185d4e11b4061409da5d592779ced484614c.zip | |
powerpc/476: Add isync after loading mmu and debug spr's
476 requires an isync after loading MMU and debug related SPR's. Some of
these are in performance-critical paths and may need to be optimized, but
initially, we're playing it safe.
Signed-off-by: Torez Smith <lnxtorez@linux.vnet.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| -rw-r--r-- | arch/powerpc/kernel/kprobes.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/process.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c index b36f074524ad..c533525ca56a 100644 --- a/arch/powerpc/kernel/kprobes.c +++ b/arch/powerpc/kernel/kprobes.c @@ -114,6 +114,9 @@ static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs) #ifdef CONFIG_PPC_ADV_DEBUG_REGS regs->msr &= ~MSR_CE; mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); +#ifdef CONFIG_PPC_47x + isync(); +#endif #endif /* diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index e4d71ced97ef..9d255b4f0a0e 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -371,6 +371,9 @@ int set_dabr(unsigned long dabr) /* XXX should we have a CPU_FTR_HAS_DABR ? */ #ifdef CONFIG_PPC_ADV_DEBUG_REGS mtspr(SPRN_DAC1, dabr); +#ifdef CONFIG_PPC_47x + isync(); +#endif #elif defined(CONFIG_PPC_BOOK3S) mtspr(SPRN_DABR, dabr); #endif |