x86/cpu: Clear SVM feature if disabled by BIOS

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When SVM is disabled by BIOS, one cannot use KVM but the
SVM feature is still shown in the output of /proc/cpuinfo.
On Intel machines, VMX is cleared by init_ia32_feat_ctl(),
so do the same on AMD and Hygon processors.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230921114940.957141-1-pbonzini@redhat.com

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This commit is contained in:

Paolo Bonzini 2023-09-21 07:49:40 -04:00 • committed by Borislav Petkov (AMD)

parent ce9ecca023

commit 7deda2ce5b

5 changed files with 25 additions and 15 deletions

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6

arch/x86/include/asm/msr-index.h

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6

arch/x86/include/asm/svm.h

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10

arch/x86/kernel/cpu/amd.c

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10

arch/x86/kernel/cpu/hygon.c

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8

arch/x86/kvm/svm/svm.c

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