[PATCH 4/5] kvm/sev: mask off firmware unsupported vm types

[Tycho Andersen]

From: "Tycho Andersen (AMD)" <tycho@xxxxxxxxxx>

In some configurations not all VM types are supported by the firmware.
Reflect this information in the supported_vm_types that KVM exports.

Link: https://lore.kernel.org/all/aZyLIWtffvEnmtYh@xxxxxxxxxx/
Suggested-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Tycho Andersen (AMD) <tycho@xxxxxxxxxx>
---
 arch/x86/kvm/svm/sev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index f941d48626d3..eeae39af63a9 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2976,6 +2976,8 @@ void __init sev_set_cpu_caps(void)
 		supported_vm_types |= BIT(KVM_X86_SNP_VM);
 	}
 
+	supported_vm_types &= sev_firmware_supported_vm_types();
+
 	kvm_caps.supported_vm_types |= supported_vm_types;
 }
 
-- 
2.53.0