[PATCH 07/12] powerpc/32s: Blacklist functions running with MMU disabled for kprobe
From: Christophe Leroy <hidden>
Date: 2020-03-29 09:41:33
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
kprobe does not handle events happening in real mode, all functions running with MMU disabled have to be blacklisted. Signed-off-by: Christophe Leroy <redacted> --- arch/powerpc/mm/book3s32/hash_low.S | 6 ++++++ 1 file changed, 6 insertions(+)
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)
--
2.25.0