KVM: SEV: Unmap and unpin the GHCB as needed on vCPU free

Browse source

Unmap and unpin the GHCB as needed when freeing a vCPU.  If the VM is
destroyed after mapping+pinning the GHCB on #VMGEXIT, without re-running
the vCPU, KVM will effectively leak the GHCB and any mappings created for
the GHCB.

Fixes: 291bd20d5d ("KVM: SVM: Add initial support for a VMGEXIT VMEXIT")
Cc: stable@vger.kernel.org
Tested-by: Michael Roth <michael.roth@amd.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260501202250.2115252-18-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20260529183549.1104619-18-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

This commit is contained in:

Sean Christopherson 2026-05-29 20:35:42 +02:00 • committed by Paolo Bonzini

parent f041dc80de

commit db38bcb331

1 changed files with 16 additions and 10 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

26

arch/x86/kvm/svm/sev.c

View file