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authorDave Kleikamp <shaggy@linux.vnet.ibm.com>2010-03-05 10:43:24 +0000
committerJosh Boyer <jwboyer@linux.vnet.ibm.com>2010-05-05 10:39:13 -0400
commit221c185d4e11b4061409da5d592779ced484614c (patch)
treebe1cd256f8f1dee8439409e32ddde6b924e05425
parentfc5e709731429bc2db27897630e7c0089f297680 (diff)
downloadop-kernel-dev-221c185d4e11b4061409da5d592779ced484614c.zip
op-kernel-dev-221c185d4e11b4061409da5d592779ced484614c.tar.gz
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.c3
-rw-r--r--arch/powerpc/kernel/process.c3
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index b36f074..c533525 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 e4d71ce..9d255b4 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
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