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powerpc/powermac: Blacklist functions running with MMU disabled for kprobe

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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>
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6316e8883753499073f47301857e4e88b73c3ddd.1585670437.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy 2020-03-31 16:03:39 +00:00 committed by Michael Ellerman
parent 7aa85127b1
commit 32a820670f
2 changed files with 6 additions and 1 deletions
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2
arch/powerpc/platforms/powermac/cache.S
View File

@ -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 */

5
arch/powerpc/platforms/powermac/sleep.S
View File

@ -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) */