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powerpc/32s: 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/dabed523c1b8955dd425152ce260b390053e727a.1585670437.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy 2020-03-31 16:03:42 +00:00 committed by Michael Ellerman
parent f892c21d2e
commit e6209318d6
1 changed files with 6 additions and 0 deletions
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6
arch/powerpc/mm/book3s32/hash_low.S
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@ -163,6 +163,7 @@ _GLOBAL(hash_page)
stw r0, (mmu_hash_lock - PAGE_OFFSET)@l(r8)
blr
#endif /* CONFIG_SMP */
_ASM_NOKPROBE_SYMBOL(hash_page)
/*
* Add an entry for a particular page to the hash table.
@ -267,6 +268,7 @@ _GLOBAL(add_hash_page)
lwz r0,4(r1)
mtlr r0
blr
_ASM_NOKPROBE_SYMBOL(add_hash_page)
/*
* This routine adds a hardware PTE to the hash table.
@ -474,6 +476,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
sync /* make sure pte updates get to memory */
blr
_ASM_NOKPROBE_SYMBOL(create_hpte)
.section .bss
.align 2
@ -630,6 +633,7 @@ _GLOBAL(flush_hash_pages)
isync
blr
EXPORT_SYMBOL(flush_hash_pages)
_ASM_NOKPROBE_SYMBOL(flush_hash_pages)
/*
* Flush an entry from the TLB
@ -667,6 +671,7 @@ _GLOBAL(_tlbie)
sync
#endif /* CONFIG_SMP */
blr
_ASM_NOKPROBE_SYMBOL(_tlbie)
/*
* Flush the entire TLB. 603/603e only
@ -708,3 +713,4 @@ _GLOBAL(_tlbia)
isync
#endif /* CONFIG_SMP */
blr
_ASM_NOKPROBE_SYMBOL(_tlbia)