KVM: SVM: CSV: Explicitly enable LBR Virtualization after succeed to … #362
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…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]>
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Avenger-285714
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Avenger-285714
merged commit dd5139c
into
deepin-community:linux-6.6.y
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…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")