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KVM: SVM: CSV: Explicitly enable LBR Virtualization after succeed to … #362

Merged
merged 1 commit into from
Aug 13, 2024
Merged

KVM: SVM: CSV: Explicitly enable LBR Virtualization after succeed to … #362

merged 1 commit into from
Aug 13, 2024

Commits on Aug 13, 2024

  1. KVM: SVM: CSV: Explicitly enable LBR Virtualization after succeed to … 

    …RECEIVE_UPDATE_VMSA

hygon inclusion
category: feature
CVE: NA

---------------------------

Before the commit b7e4be0a224f ("KVM: SEV-ES: Delegate LBR
virtualization to the processor"), the LBR Virtualization is enabled
during init VMCB:
    init_vmcb() -> sev_init_vmcb() -> sev_es_init_vmcb()

While the commit b7e4be0a224f ("KVM: SEV-ES: Delegate LBR
virtualization to the processor") enable LBR Virtualization after
succeed to LAUNCH_UPDATE_VMSA for each vCPUs. The process to enable LBR
Virtualization will not be executed in common code path. To ensure the
CSV2 guest to work properly after migrated to target machine, we should
explicitly to enable LBR Virtualization after succeed to
RECEIVE_UPDATE_VMSA for each vCPUs.

Fixes: b7e4be0a224f ("KVM: SEV-ES: Delegate LBR virtualization to the processor")
Signed-off-by: hanliyang <[email protected]>
    @Avenger-285714
    hanliyang authored and Avenger-285714 committed Aug 13, 2024
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