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

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Message-Id: <20210622144825.27588-2-joro@8bytes.org>
Date:   Tue, 22 Jun 2021 16:48:23 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     x86@...nel.org
Cc:     Joerg Roedel <joro@...tes.org>, Joerg Roedel <jroedel@...e.de>,
        hpa@...or.com, Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Slaby <jslaby@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Juergen Gross <jgross@...e.com>,
        Kees Cook <keescook@...omium.org>,
        David Rientjes <rientjes@...gle.com>,
        Cfir Cohen <cfir@...gle.com>,
        Erdem Aktas <erdemaktas@...gle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mike Stunes <mstunes@...are.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Martin Radev <martin.b.radev@...il.com>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org
Subject: [PATCH 1/3] x86/sev: Add Comments to existing GHCB MSR protocol defines

From: Joerg Roedel <jroedel@...e.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@...e.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