From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
masahiroy@kernel.org, npiggin@gmail.com, sv@linux.ibm.com,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH AUTOSEL 6.5 27/31] powerpc/85xx: Fix math emulation exception
Date: Wed, 18 Oct 2023 10:11:44 -0400 [thread overview]
Message-ID: <20231018141151.1334501-27-sashal@kernel.org> (raw)
In-Reply-To: <20231018141151.1334501-1-sashal@kernel.org>
From: Christophe Leroy <christophe.leroy@csgroup.eu>
[ 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>
---
arch/powerpc/kernel/head_85xx.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/head_85xx.S b/arch/powerpc/kernel/head_85xx.S
index fdbee1093e2ba..f9634111e82ed 100644
--- a/arch/powerpc/kernel/head_85xx.S
+++ b/arch/powerpc/kernel/head_85xx.S
@@ -396,7 +396,7 @@ 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 */
--
2.40.1
prev parent reply other threads:[~2023-10-18 14:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20231018141151.1334501-1-sashal@kernel.org>
2023-10-18 14:11 ` [PATCH AUTOSEL 6.5 07/31] ASoC: fsl-asoc-card: use integer type for fll_id and pll_id Sasha Levin
2023-10-18 14:11 ` Sasha Levin [this message]
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