[PATCH 6.18 165/198] KVM: selftests: Remove duplicate LAUNCH_UPDATE_VMSA call in SEV-ES migrate test

Greg Kroah-Hartman
2026-04-20T16:04:19Z

From: Sean Christopherson <seanjc@google.com>

commit 25a642b6abc98bbbabbf2baef9fc498bbea6aee6 upstream.

Drop the explicit KVM_SEV_LAUNCH_UPDATE_VMSA call when creating an SEV-ES
VM in the SEV migration test, as sev_vm_create() automatically updates the
VMSA pages for SEV-ES guests. The only reason the duplicate call doesn't
cause visible problems is because the test doesn't actually try to run the
vCPUs. That will change when KVM adds a check to prevent userspace from
re-launching a VMSA (which corrupts the VMSA page due to KVM writing
encrypted private memory).

Fixes: 69f8e15ab61f ("KVM: selftests: Use the SEV library APIs in the intra-host migration test")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260310234829.2608037-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/testing/selftests/kvm/x86/sev_migrate_tests.c | 2 --
1 file changed, 2 deletions(-)

--- a/tools/testing/selftests/kvm/x86/sev_migrate_tests.c
+++ b/tools/testing/selftests/kvm/x86/sev_migrate_tests.c
@@ -36,8 +36,6 @@ static struct kvm_vm *sev_vm_create(bool

sev_vm_launch(vm, es ? SEV_POLICY_ES : 0);

- if (es)
- vm_sev_ioctl(vm, KVM_SEV_LAUNCH_UPDATE_VMSA, NULL);
return vm;
}