Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'x86_urgent_for_v6.3_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Borislav Petkov:
"A single erratum fix for AMD machines:
- Disable XSAVES on AMD Zen1 and Zen2 machines due to an erratum. No
impact to anything as those machines will fallback to XSAVEC which
is equivalent there"
* tag 'x86_urgent_for_v6.3_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/CPU/AMD: Disable XSAVES on AMD family 0x17
+9
+9
arch/x86/kernel/cpu/amd.c
+9
arch/x86/kernel/cpu/amd.c
···
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}
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}
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#endif
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/*
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* Work around Erratum 1386. The XSAVES instruction malfunctions in
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* certain circumstances on Zen1/2 uarch, and not all parts have had
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* updated microcode at the time of writing (March 2023).
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*
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* Affected parts all have no supervisor XSAVE states, meaning that
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* the XSAVEC instruction (which works fine) is equivalent.
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*/
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clear_cpu_cap(c, X86_FEATURE_XSAVES);
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}
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static void init_amd_zn(struct cpuinfo_x86 *c)