Commit e6209318 authored by Christophe Leroy's avatar Christophe Leroy Committed by Michael Ellerman
Browse files

powerpc/32s: Blacklist functions running with MMU disabled for kprobe 



kprobe does not handle events happening in real mode, all
functions running with MMU disabled have to be blacklisted.

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Acked-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/dabed523c1b8955dd425152ce260b390053e727a.1585670437.git.christophe.leroy@c-s.fr
parent f892c21d

arch/powerpc/mm/book3s32/hash_low.S

+6 −0
Original line number Diff line number Diff line
@@ -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)