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(parent: 55fba69) | patch
LoongArch: Fix probing of the CRC32 feature
authorHuacai Chen <chenhuacai@loongson.cn>
Tue, 18 Apr 2023 11:38:58 +0000 (19:38 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 26 Apr 2023 12:28:38 +0000 (14:28 +0200)
commite82caab68951fd6c1813cb49ba662b479fe39ec5
treed50ef5e3b69eaed913bb95831c6b92de74cb96d5tree | snapshot
parent55fba69fbfd04cfa81ecbdb8c56e6b9f02123cd2commit | diff
LoongArch: Fix probing of the CRC32 feature

commit df830336045db1246d3245d3737fee9939c5f731 upstream.

Not all LoongArch processors support CRC32 instructions. This feature
is indicated by CPUCFG1.CRC32 (Bit25) but it is wrongly defined in the
previous versions of the ISA manual (and so does in loongarch.h). The
CRC32 feature is set unconditionally now, so fix it.

BTW, expose the CRC32 feature in /proc/cpuinfo.

Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/loongarch/include/asm/cpu-features.h diff | blob | history
arch/loongarch/include/asm/cpu.h diff | blob | history
arch/loongarch/include/asm/loongarch.h diff | blob | history
arch/loongarch/kernel/cpu-probe.c diff | blob | history
arch/loongarch/kernel/proc.c diff | blob | history
Domain: System / Kernel;