KVM: SVM: Set synthesized TSA CPUID flags

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Commit f3f9deccfc LTS

VERW_CLEAR is supposed to be set only by the hypervisor to denote TSA
mitigation support to a guest. SQ_NO and L1_NO are both synthesizable,
and are going to be set by hw CPUID on future machines.

So keep the kvm_cpu_cap_init_kvm_defined() invocation *and* set them
when synthesized.

This fix is stable-only.

Co-developed-by: Jinpu Wang <jinpu.wang@ionos.com>
Signed-off-by: Jinpu Wang <jinpu.wang@ionos.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org> # 5.15.y
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Borislav Petkov (AMD) 2025-09-09 20:28:26 -04:00 • committed by Greg Kroah-Hartman

parent 54270c1b29

commit 34b87ac4bb

1 changed files with 5 additions and 0 deletions

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arch/x86/kvm/cpuid.c

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