Received-SPF: pass (google.com: domain of linux-kernel+bounces-208006-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1;
From: vsntk18@gmail.com
To: vsntk18@gmail.com
Cc: x86@kernel.org,
	Borislav.Petkov@amd.com,
	Dhaval.Giani@amd.com,
	ashish.kalra@amd.com,
	cfir@google.com,
	dan.j.williams@intel.com,
	dave.hansen@linux.intel.com,
	ebiederm@xmission.com,
	erdemaktas@google.com,
	hpa@zytor.com,
	jgross@suse.com,
	jroedel@suse.de,
	jslaby@suse.cz,
	keescook@chromium.org,
	kexec@lists.infradead.org,
	kvm@vger.kernel.org,
	linux-coco@lists.linux.dev,
	linux-kernel@vger.kernel.org,
	luto@kernel.org,
	martin.b.radev@gmail.com,
	mhiramat@kernel.org,
	michael.roth@amd.com,
	mstunes@vmware.com,
	nivedita@alum.mit.edu,
	peterz@infradead.org,
	rientjes@google.com,
	seanjc@google.com,
	stable@vger.kernel.org,
	thomas.lendacky@amd.com,
	virtualization@lists.linux-foundation.org,
	vkarasulli@suse.de
Subject: [PATCH v6 03/10] x86/sev: Set GHCB data structure version
Date: Mon, 10 Jun 2024 12:21:06 +0200
Message-Id: <20240610102113.20969-4-vsntk18@gmail.com>
In-Reply-To: <20240610102113.20969-1-vsntk18@gmail.com>
References: <20240610102113.20969-1-vsntk18@gmail.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

From: Joerg Roedel <jroedel@suse.de>

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@suse.de>
Signed-off-by: Vasant Karasulli <vkarasulli@suse.de>
---
 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 ca20cc4e5826..963d51dcf0e6 100644
--- a/arch/x86/include/asm/sev.h
+++ b/arch/x86/include/asm/sev.h
@@ -19,6 +19,9 @@
 #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"); }
 
 struct boot_params;
diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c
index f5717eddf75b..f63262a9c2a5 100644
--- a/arch/x86/kernel/sev-shared.c
+++ b/arch/x86/kernel/sev-shared.c
@@ -264,7 +264,7 @@ 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