diff mbox series

[07/12] powerpc/32s: Blacklist functions running with MMU disabled for kprobe

Message ID 16b177dc702570a1ef896857fd53b82bfdc7fd5d.1585474724.git.christophe.leroy@c-s.fr (mailing list archive)
State Superseded
Headers show
Series [01/12] powerpc/52xx: Blacklist functions running with MMU disabled for kprobe | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (c6624071c338732402e8c726df6a4074473eaa0e)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 39 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Christophe Leroy March 29, 2020, 9:41 a.m. UTC 
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/mm/book3s32/hash_low.S | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/mm/book3s32/hash_low.S b/arch/powerpc/mm/book3s32/hash_low.S
index 2afa3fa2012d..f5f836477009 100644
--- a/arch/powerpc/mm/book3s32/hash_low.S
+++ b/arch/powerpc/mm/book3s32/hash_low.S
@@ -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.
@@ -472,6 +474,7 @@  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
@@ -628,6 +631,7 @@  _GLOBAL(flush_hash_pages)
 	isync
 	blr
 EXPORT_SYMBOL(flush_hash_pages)
+_ASM_NOKPROBE_SYMBOL(flush_hash_pages)
 
 /*
  * Flush an entry from the TLB
@@ -665,6 +669,7 @@  _GLOBAL(_tlbie)
 	sync
 #endif /* CONFIG_SMP */
 	blr
+_ASM_NOKPROBE_SYMBOL(_tlbie)
 
 /*
  * Flush the entire TLB. 603/603e only
@@ -706,3 +711,4 @@  _GLOBAL(_tlbia)
 	isync
 #endif /* CONFIG_SMP */
 	blr
+_ASM_NOKPROBE_SYMBOL(_tlbia)