[PATCH v3 09/15] KVM: SEV: disable DEBUG_SWAP by default

[Paolo Bonzini]

Disable all VMSA features in KVM_SEV_INIT and KVM_SEV_ES_INIT.  They are
not actually supported by SEV (a SEV guest does not have a VMSA to which
you can apply features) and they cause unexpected changes in measurement
for SEV-ES.

Going on, the way to enable them will be to use a new initialization ioctl
that takes the VMSA features as a parameter.

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 arch/x86/kvm/svm/sev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index b46612db0594..2db0b2b36120 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -252,7 +252,7 @@ static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
 
 	sev->active = true;
 	sev->es_active = argp->id == KVM_SEV_ES_INIT;
-	sev->vmsa_features = sev_supported_vmsa_features;
+	sev->vmsa_features = 0;
 
 	ret = sev_asid_new(sev);
 	if (ret)
-- 
2.39.1