From: Joerg Roedel <jroedel@xxxxxxx>
It turned out that the GHCB->protocol field does not declare the
version of the guest-hypervisor communication protocol, but rather the
version of the GHCB data structure. Reflect that in the define used to
set the protocol field.
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Vasant Karasulli <vkarasulli@xxxxxxx>
---
arch/x86/include/asm/sev.h | 3 +++
arch/x86/kernel/sev-shared.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h
index 5b4a1ce3d368..c48db0bfb707 100644
--- a/arch/x86/include/asm/sev.h
+++ b/arch/x86/include/asm/sev.h
@@ -20,6 +20,9 @@
#define GHCB_PROTOCOL_MAX 2ULL
#define GHCB_DEFAULT_USAGE 0ULL
+/* Version of the GHCB data structure */
+#define GHCB_VERSION 1
+
#define VMGEXIT() { asm volatile("rep; vmmcall\n\r"); }
enum es_result {
diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c
index c02a087c7945..6adae48c501f 100644
--- a/arch/x86/kernel/sev-shared.c
+++ b/arch/x86/kernel/sev-shared.c
@@ -257,7 +257,7 @@ static enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,
u64 exit_info_2)
{
/* Fill in protocol and format specifiers */
- ghcb->protocol_version = ghcb_version;
+ ghcb->protocol_version = GHCB_VERSION;
ghcb->ghcb_usage = GHCB_DEFAULT_USAGE;
ghcb_set_sw_exit_code(ghcb, exit_code);
--
2.34.1
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