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powerpc/8xx: Fix software emulation interrupt

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[ 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: fbbcc3bb13 ("powerpc/8xx: Remove SoftwareEmulation()")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ad782af87a222efc79cfb06079b0fd23d4224eaf.1612515180.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christophe Leroy 2021-02-05 08:56:13 +00:00 committed by Greg Kroah-Hartman
parent ba5c8a0ee6
commit ecfae933df
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/head_8xx.S
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@ -191,7 +191,7 @@ SystemCall:
/* On the MPC8xx, this is a software emulation interrupt. It occurs /* On the MPC8xx, this is a software emulation interrupt. It occurs
* for all unimplemented and illegal instructions. * for all unimplemented and illegal instructions.
*/ */
EXCEPTION(0x1000, SoftEmu, program_check_exception, EXC_XFER_STD) EXCEPTION(0x1000, SoftEmu, emulation_assist_interrupt, EXC_XFER_STD)
/* Called from DataStoreTLBMiss when perf TLB misses events are activated */ /* Called from DataStoreTLBMiss when perf TLB misses events are activated */
#ifdef CONFIG_PERF_EVENTS #ifdef CONFIG_PERF_EVENTS