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From: "tip-bot2 for Brijesh Singh" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Joerg Roedel <jroedel@suse.de>, Borislav Petkov <bp@suse.de>,
	x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: x86/sev] x86/sev: Add defines for GHCB version 2 MSR protocol requests
Date: Wed, 23 Jun 2021 13:32:14 -0000	[thread overview]
Message-ID: <162445513402.395.15234934774265504366.tip-bot2@tip-bot2> (raw)
In-Reply-To: <YNLXQIZ5e1wjkshG@8bytes.org>

The following commit has been merged into the x86/sev branch of tip:

Commit-ID:     310f134ed41fcaa03eff302b1e69f1ce1ee21841
Gitweb:        https://git.kernel.org/tip/310f134ed41fcaa03eff302b1e69f1ce1ee21841
Author:        Brijesh Singh <brijesh.singh@amd.com>
AuthorDate:    Wed, 23 Jun 2021 08:40:00 +02:00
Committer:     Borislav Petkov <bp@suse.de>
CommitterDate: Wed, 23 Jun 2021 11:25:17 +02:00

x86/sev: Add defines for GHCB version 2 MSR protocol requests

Add the necessary defines for supporting the GHCB version 2 protocol.
This includes defines for:

	- MSR-based AP hlt request/response
	- Hypervisor Feature request/response

This is the bare minimum of requests that need to be supported by a GHCB
version 2 implementation. There are more requests in the specification,
but those depend on Secure Nested Paging support being available.

These defines are shared between SEV host and guest support.

  [ bp: Fold in https://lkml.kernel.org/r/20210622144825.27588-2-joro@8bytes.org too.
        Simplify the brewing macro maze into readability. ]

Co-developed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/YNLXQIZ5e1wjkshG@8bytes.org
---
 arch/x86/include/asm/sev-common.h | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
index 629c3df..2cef6c5 100644
--- a/arch/x86/include/asm/sev-common.h
+++ b/arch/x86/include/asm/sev-common.h
@@ -9,8 +9,13 @@
 #define __ASM_X86_SEV_COMMON_H
 
 #define GHCB_MSR_INFO_POS		0
-#define GHCB_MSR_INFO_MASK		(BIT_ULL(12) - 1)
+#define GHCB_DATA_LOW			12
+#define GHCB_MSR_INFO_MASK		(BIT_ULL(GHCB_DATA_LOW) - 1)
 
+#define GHCB_DATA(v)			\
+	(((unsigned long)(v) & ~GHCB_MSR_INFO_MASK) >> GHCB_DATA_LOW)
+
+/* 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 +33,7 @@
 #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
@@ -45,6 +51,14 @@
 		(((unsigned long)reg & GHCB_MSR_CPUID_REG_MASK) << GHCB_MSR_CPUID_REG_POS) | \
 		(((unsigned long)fn) << GHCB_MSR_CPUID_FUNC_POS))
 
+/* AP Reset Hold */
+#define GHCB_MSR_AP_RESET_HOLD_REQ		0x006
+#define GHCB_MSR_AP_RESET_HOLD_RESP		0x007
+
+/* GHCB Hypervisor Feature Request/Response */
+#define GHCB_MSR_HV_FT_REQ			0x080
+#define GHCB_MSR_HV_FT_RESP			0x081
+
 #define GHCB_MSR_TERM_REQ		0x100
 #define GHCB_MSR_TERM_REASON_SET_POS	12
 #define GHCB_MSR_TERM_REASON_SET_MASK	0xf

  parent reply	other threads:[~2021-06-23 13:32 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-22 14:48 [PATCH 0/3] x86/sev: Minor updates for SEV guest support Joerg Roedel
2021-06-22 14:48 ` Joerg Roedel
2021-06-22 14:48 ` [PATCH 1/3] x86/sev: Add Comments to existing GHCB MSR protocol defines Joerg Roedel
2021-06-22 14:48   ` Joerg Roedel
2021-06-22 14:48 ` [PATCH 2/3] x86/sev: Add defines for GHCB version 2 MSR protocol requests Joerg Roedel
2021-06-22 14:48   ` Joerg Roedel
2021-06-22 16:19   ` Tom Lendacky
2021-06-22 16:19     ` Tom Lendacky via Virtualization
2021-06-22 16:34     ` Brijesh Singh
2021-06-22 16:34       ` Brijesh Singh via Virtualization
2021-06-23  6:40   ` Joerg Roedel
2021-06-23  6:40     ` Joerg Roedel
2021-06-23  9:32     ` Borislav Petkov
2021-06-23  9:32       ` Borislav Petkov
2021-06-23  9:49       ` Joerg Roedel
2021-06-23  9:49         ` Joerg Roedel
2021-06-23 12:33       ` Brijesh Singh
2021-06-23 12:33         ` Brijesh Singh via Virtualization
2021-06-23 13:12       ` Tom Lendacky
2021-06-23 13:12         ` Tom Lendacky via Virtualization
2021-06-23 13:32     ` tip-bot2 for Brijesh Singh [this message]
2021-06-22 14:48 ` [PATCH 3/3] x86/sev: Use "SEV: " prefix for messages from sev.c Joerg Roedel
2021-06-22 14:48   ` Joerg Roedel
2021-06-23 13:32   ` [tip: x86/sev] " tip-bot2 for Joerg Roedel

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