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Commit 221c185d authored by Dave Kleikamp's avatar Dave Kleikamp Committed by Josh Boyer
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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: default avatarTorez Smith <lnxtorez@linux.vnet.ibm.com>
Signed-off-by: default avatarDave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
parent fc5e7097

arch/powerpc/kernel/kprobes.c

+3 −0
Original line number Diff line number Diff line
@@ -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



	/*

arch/powerpc/kernel/process.c

+3 −0
Original line number Diff line number Diff line
@@ -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