From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
naveen.n.rao@linux.vnet.ibm.com
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 07/12] powerpc/32s: Blacklist functions running with MMU disabled for kprobe
Date: Sun, 29 Mar 2020 09:41:07 +0000 (UTC) [thread overview]
Message-ID: <16b177dc702570a1ef896857fd53b82bfdc7fd5d.1585474724.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <dff05b59a161434a546010507000816750073f28.1585474724.git.christophe.leroy@c-s.fr>
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 --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
next prev parent reply other threads:[~2020-03-29 9:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-29 9:41 [PATCH 01/12] powerpc/52xx: Blacklist functions running with MMU disabled for kprobe Christophe Leroy
2020-03-29 9:41 ` [PATCH 02/12] powerpc/82xx: Blacklist pq2_restart() " Christophe Leroy
2020-03-29 9:41 ` [PATCH 03/12] powerpc/83xx: Blacklist mpc83xx_deep_resume() " Christophe Leroy
2020-03-29 9:41 ` [PATCH 04/12] powerpc/powermac: Blacklist functions running with MMU disabled " Christophe Leroy
2020-03-29 9:41 ` [PATCH 05/12] powerpc/mem: Blacklist flush_dcache_icache_phys() " Christophe Leroy
2020-03-29 9:41 ` [PATCH 06/12] powerpc/32s: Make local symbols non visible in hash_low Christophe Leroy
2020-03-30 17:06 ` Naveen N. Rao
2020-03-30 17:22 ` Christophe Leroy
2020-03-30 17:49 ` Naveen N. Rao
2020-03-29 9:41 ` Christophe Leroy [this message]
2020-03-29 9:41 ` [PATCH 08/12] powerpc/rtas: Remove machine_check_in_rtas() Christophe Leroy
2020-03-29 9:41 ` [PATCH 09/12] powerpc/32: Blacklist functions running with MMU disabled for kprobe Christophe Leroy
2020-03-29 9:41 ` [PATCH 10/12] powerpc/entry32: Blacklist exception entry points " Christophe Leroy
2020-03-30 17:08 ` Naveen N. Rao
2020-03-30 18:33 ` Christophe Leroy
2020-03-31 5:51 ` Christophe Leroy
2020-03-31 6:17 ` Naveen N. Rao
2020-03-31 6:28 ` Christophe Leroy
2020-03-31 6:44 ` Naveen N. Rao
2020-03-31 6:13 ` Naveen N. Rao
2020-03-29 9:41 ` [PATCH 11/12] powerpc/entry32: Blacklist syscall exit " Christophe Leroy
2020-03-29 9:41 ` [PATCH 12/12] powerpc/entry32: Blacklist exception " Christophe Leroy
2020-03-30 17:13 ` [PATCH 01/12] powerpc/52xx: Blacklist functions running with MMU disabled " Naveen N. Rao
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