diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2023-09-25 17:55:51 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-08 17:26:45 +0100 |
| commit | abc62fc06d4a75006ab840e3a7838b67a1e6c545 (patch) | |
| tree | 851fce268b9f36b466a859537a3b539a6f5e62a9 /arch/powerpc | |
| parent | 4bdde4dca00e6bb8c4c53577227b182b6bbdd1fb (diff) | |
powerpc/85xx: Fix math emulation exception
[ Upstream commit 8e8a12ecbc86700b5e1a3596ce2b3c43dafad336 ]
Booting mpc85xx_defconfig kernel on QEMU leads to:
Bad trap at PC: fe9bab0, SR: 2d000, vector=800
awk[82]: unhandled trap (5) at 0 nip fe9bab0 lr fe9e01c code 5 in libc-2.27.so[fe5a000+17a000]
awk[82]: code: 3aa00000 3a800010 4bffe03c 9421fff0 7ca62b78 38a00000 93c10008 83c10008
awk[82]: code: 38210010 4bffdec8 9421ffc0 7c0802a6 <fc00048e> d8010008 4815190d 93810030
Trace/breakpoint trap
WARNING: no useful console
This is because allthough CONFIG_MATH_EMULATION is selected,
Exception 800 calls unknown_exception().
Call emulation_assist_interrupt() instead.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/066caa6d9480365da9b8ed83692d7101e10ac5f8.1695657339.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/head_fsl_booke.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 0a9a0f301474..40687e271c10 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -394,7 +394,7 @@ interrupt_base: #ifdef CONFIG_PPC_FPU FP_UNAVAILABLE_EXCEPTION #else - EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, unknown_exception) + EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, emulation_assist_interrupt) #endif /* System Call Interrupt */ |