x86/srso: Add IBPB on VMEXIT

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Upstream commit: d893832d0e

Add the option to flush IBPB only on VMEXIT in order to protect from
malicious guests but one otherwise trusts the software that runs on the
hypervisor.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Borislav Petkov (AMD) 2023-07-07 13:53:41 +02:00 • committed by Greg Kroah-Hartman

parent 79c8091888

commit c9ae63d773

4 changed files with 26 additions and 1 deletions

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1

arch/x86/include/asm/cpufeatures.h

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19

arch/x86/kernel/cpu/bugs.c

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4

arch/x86/kvm/svm/svm.c

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3

arch/x86/kvm/svm/vmenter.S

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