From: Christophe Leroy <christophe.le...@csgroup.eu>
[ Upstream commit 903178d0ce6bb30ef80a3604ab9ee2b57869fbc9 ]
For unimplemented instructions or unimplemented SPRs, the 8xx triggers
a "Software Emulation Exception" (0x1000). That interrupt doesn't set
reason bits in SRR1 as the "Program Check Exception" does.
Go through emulation_assist_interrupt() to set REASON_ILLEGAL.
Fixes: fbbcc3bb139e ("powerpc/8xx: Remove SoftwareEmulation()")
Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Link:
https://lore.kernel.org/r/ad782af87a222efc79cfb06079b0fd23d4224eaf.1612515180.git.christophe.le...@csgroup.eu
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
arch/powerpc/kernel/head_8xx.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 52702f3db6df6..9eb63cf6ac38e 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -165,7 +165,7 @@ SystemCall:
/* On the MPC8xx, this is a software emulation interrupt. It occurs
* for all unimplemented and illegal instructions.
*/
- EXCEPTION(0x1000, SoftEmu, program_check_exception, EXC_XFER_STD)
+ EXCEPTION(0x1000, SoftEmu, emulation_assist_interrupt, EXC_XFER_STD)
. = 0x1100
/*
--
2.27.0
