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powerpc/52xx: Blacklist functions running with MMU disabled for kprobe
authorChristophe Leroy <christophe.leroy@c-s.fr>
Tue, 31 Mar 2020 16:03:36 +0000 (16:03 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 2 Jun 2020 10:59:08 +0000 (20:59 +1000)
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/1ae02b6637b87fc5aaa1d5012c3e2cb30e62b4a3.1585670437.git.christophe.leroy@c-s.fr
arch/powerpc/platforms/52xx/lite5200_sleep.S patch | blob | history

diff --git a/arch/powerpc/platforms/52xx/lite5200_sleep.S b/arch/powerpc/platforms/52xx/lite5200_sleep.S
index 3a9969c..7008364 100644 (file)
--- a/arch/powerpc/platforms/52xx/lite5200_sleep.S
+++ b/arch/powerpc/platforms/52xx/lite5200_sleep.S
@@ -248,6 +248,7 @@ mmu_on:
 
 
        blr
+_ASM_NOKPROBE_SYMBOL(lite5200_wakeup)
 
 
 /* ---------------------------------------------------------------------- */
@@ -391,6 +392,7 @@ restore_regs:
        LOAD_SPRN(TBWU,  0x5b);
 
        blr
+_ASM_NOKPROBE_SYMBOL(restore_regs)
 
 
 
Domain: System / Kernel;