[PATCH v5 6/6] KVM: SVM: Increase supported GHCB protocol version

Joerg Roedel
2021-10-20T12:44:44Z

From: Brijesh Singh <brijesh.singh@amd.com>

Now that KVM has basic support for version 2 of the GHCB specification,
bump the maximum supported protocol version. The SNP specific functions
are still missing, but those are only required when the Hypervisor
supports running SNP guests.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
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 0c673291e905..3ad69f4f0ed6 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2394,7 +2394,7 @@ static u64 ghcb_msr_cpuid_resp(u64 reg, u64 value)
}

/* The min/max GHCB version supported by KVM. */
-#define GHCB_VERSION_MAX 1ULL
+#define GHCB_VERSION_MAX 2ULL
#define GHCB_VERSION_MIN 1ULL

static u64 ghcb_msr_version_info(void)
--
2.33.1