[PATCH 1/3] x86/sev: Add Comments to existing GHCB MSR protocol defines

Joerg Roedel
2021-06-22T14:48:46Z

From: Joerg Roedel <jroedel@suse.de>

Add comments to the defines for SEV Info and CPUID MSR protocol defines
to document to which protocol part they belong.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
arch/x86/include/asm/sev-common.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
index 629c3df243f0..1cc9e7dd8107 100644
--- a/arch/x86/include/asm/sev-common.h
+++ b/arch/x86/include/asm/sev-common.h
@@ -11,6 +11,7 @@
#define GHCB_MSR_INFO_POS 0
#define GHCB_MSR_INFO_MASK (BIT_ULL(12) - 1)

+/* SEV Information Request/Response */
#define GHCB_MSR_SEV_INFO_RESP 0x001
#define GHCB_MSR_SEV_INFO_REQ 0x002
#define GHCB_MSR_VER_MAX_POS 48
@@ -28,6 +29,7 @@
#define GHCB_MSR_PROTO_MAX(v) (((v) >> GHCB_MSR_VER_MAX_POS) & GHCB_MSR_VER_MAX_MASK)
#define GHCB_MSR_PROTO_MIN(v) (((v) >> GHCB_MSR_VER_MIN_POS) & GHCB_MSR_VER_MIN_MASK)

+/* CPUID Request/Response */
#define GHCB_MSR_CPUID_REQ 0x004
#define GHCB_MSR_CPUID_RESP 0x005
#define GHCB_MSR_CPUID_FUNC_POS 32
--
2.31.1