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Subject[PATCH 04/12] powerpc/powermac: Blacklist functions running with MMU disabled for kprobe
Date
kprobe does not handle events happening in real mode, all
functions running with MMU disabled have to be blacklisted.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
arch/powerpc/platforms/powermac/cache.S | 2 ++
arch/powerpc/platforms/powermac/sleep.S | 5 ++++-
2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powermac/cache.S b/arch/powerpc/platforms/powermac/cache.S
index da69e0fcb4f1..ced225415486 100644
--- a/arch/powerpc/platforms/powermac/cache.S
+++ b/arch/powerpc/platforms/powermac/cache.S
@@ -184,6 +184,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)

mtlr r10
blr
+_ASM_NOKPROBE_SYMBOL(flush_disable_75x)

/* This code is for 745x processors */
flush_disable_745x:
@@ -351,4 +352,5 @@ END_FTR_SECTION_IFSET(CPU_FTR_L3CR)
mtmsr r11 /* restore DR and EE */
isync
blr
+_ASM_NOKPROBE_SYMBOL(flush_disable_745x)
#endif /* CONFIG_PPC_BOOK3S_32 */
diff --git a/arch/powerpc/platforms/powermac/sleep.S b/arch/powerpc/platforms/powermac/sleep.S
index bd6085b470b7..f9a680fdd9c4 100644
--- a/arch/powerpc/platforms/powermac/sleep.S
+++ b/arch/powerpc/platforms/powermac/sleep.S
@@ -244,7 +244,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_SPEC7450)
mtmsr r2
isync
b 1b
-
+_ASM_NOKPROBE_SYMBOL(low_cpu_die)
/*
* Here is the resume code.
*/
@@ -282,6 +282,7 @@ _GLOBAL(core99_wake_up)
lwz r1,0(r3)

/* Pass thru to older resume code ... */
+_ASM_NOKPROBE_SYMBOL(core99_wake_up)
/*
* Here is the resume code for older machines.
* r1 has the physical address of SL_PC(sp).
@@ -429,6 +430,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
lwz r0,4(r1)
mtlr r0
blr
+_ASM_NOKPROBE_SYMBOL(grackle_wake_up)

turn_on_mmu:
mflr r4
@@ -438,6 +440,7 @@ turn_on_mmu:
sync
isync
rfi
+_ASM_NOKPROBE_SYMBOL(turn_on_mmu)

#endif /* defined(CONFIG_PM) || defined(CONFIG_CPU_FREQ) */

--
2.25.0
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