From: Christophe Leroy Date: Fri, 5 Feb 2021 08:56:13 +0000 (+0000) Subject: powerpc/8xx: Fix software emulation interrupt X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=903178d0ce6bb30ef80a3604ab9ee2b57869fbc9;p=linux.git powerpc/8xx: Fix software emulation interrupt 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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/ad782af87a222efc79cfb06079b0fd23d4224eaf.1612515180.git.christophe.leroy@csgroup.eu --- diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 7869db9741853..46dff3f9c31f1 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 /*