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Date: Fri, 28 Jun 2024 13:52:43 -0500
From: Michael Roth <michael.roth@....com>
To: <kvm@...r.kernel.org>
CC: <linux-coco@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
<x86@...nel.org>, <pbonzini@...hat.com>, <seanjc@...gle.com>,
<jroedel@...e.de>, <thomas.lendacky@....com>, <pgonda@...gle.com>,
<ashish.kalra@....com>, <bp@...en8.de>, <pankaj.gupta@....com>,
<liam.merwick@...cle.com>
Subject: [PATCH v2 2/3] x86/sev: Move sev_guest.h into common SEV header
sev_guest.h currently contains various definitions relating to the
format of SNP_GUEST_REQUEST commands to SNP firmware. Currently only the
sev-guest driver makes use of them, but when the KVM side of this is
implemented there's a need to parse the SNP_GUEST_REQUEST header to
determine whether additional information needs to be provided to the
guest. Prepare for this by moving those definitions to a common header
that's shared by host/guest code so that KVM can also make use of them.
Reviewed-by: Tom Lendacky <thomas.lendacky@....com>
Reviewed-by: Liam Merwick <liam.merwick@...cle.com>
Signed-off-by: Michael Roth <michael.roth@....com>
---
arch/x86/include/asm/sev.h | 48 +++++++++++++++++++
drivers/virt/coco/sev-guest/sev-guest.c | 2 -
drivers/virt/coco/sev-guest/sev-guest.h | 63 -------------------------
3 files changed, 48 insertions(+), 65 deletions(-)
delete mode 100644 drivers/virt/coco/sev-guest/sev-guest.h
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h
index 1936f37e3371..72f9ba3a2fee 100644
--- a/arch/x86/include/asm/sev.h
+++ b/arch/x86/include/asm/sev.h
@@ -119,6 +119,54 @@ struct snp_req_data {
unsigned int data_npages;
};
+#define MAX_AUTHTAG_LEN 32
+
+/* See SNP spec SNP_GUEST_REQUEST section for the structure */
+enum msg_type {
+ SNP_MSG_TYPE_INVALID = 0,
+ SNP_MSG_CPUID_REQ,
+ SNP_MSG_CPUID_RSP,
+ SNP_MSG_KEY_REQ,
+ SNP_MSG_KEY_RSP,
+ SNP_MSG_REPORT_REQ,
+ SNP_MSG_REPORT_RSP,
+ SNP_MSG_EXPORT_REQ,
+ SNP_MSG_EXPORT_RSP,
+ SNP_MSG_IMPORT_REQ,
+ SNP_MSG_IMPORT_RSP,
+ SNP_MSG_ABSORB_REQ,
+ SNP_MSG_ABSORB_RSP,
+ SNP_MSG_VMRK_REQ,
+ SNP_MSG_VMRK_RSP,
+
+ SNP_MSG_TYPE_MAX
+};
+
+enum aead_algo {
+ SNP_AEAD_INVALID,
+ SNP_AEAD_AES_256_GCM,
+};
+
+struct snp_guest_msg_hdr {
+ u8 authtag[MAX_AUTHTAG_LEN];
+ u64 msg_seqno;
+ u8 rsvd1[8];
+ u8 algo;
+ u8 hdr_version;
+ u16 hdr_sz;
+ u8 msg_type;
+ u8 msg_version;
+ u16 msg_sz;
+ u32 rsvd2;
+ u8 msg_vmpck;
+ u8 rsvd3[35];
+} __packed;
+
+struct snp_guest_msg {
+ struct snp_guest_msg_hdr hdr;
+ u8 payload[4000];
+} __packed;
+
struct sev_guest_platform_data {
u64 secrets_gpa;
};
diff --git a/drivers/virt/coco/sev-guest/sev-guest.c b/drivers/virt/coco/sev-guest/sev-guest.c
index 654290a8e1ba..f0ea26f18cbf 100644
--- a/drivers/virt/coco/sev-guest/sev-guest.c
+++ b/drivers/virt/coco/sev-guest/sev-guest.c
@@ -29,8 +29,6 @@
#include <asm/svm.h>
#include <asm/sev.h>
-#include "sev-guest.h"
-
#define DEVICE_NAME "sev-guest"
#define AAD_LEN 48
#define MSG_HDR_VER 1
diff --git a/drivers/virt/coco/sev-guest/sev-guest.h b/drivers/virt/coco/sev-guest/sev-guest.h
deleted file mode 100644
index 21bda26fdb95..000000000000
--- a/drivers/virt/coco/sev-guest/sev-guest.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2021 Advanced Micro Devices, Inc.
- *
- * Author: Brijesh Singh <brijesh.singh@....com>
- *
- * SEV-SNP API spec is available at https://developer.amd.com/sev
- */
-
-#ifndef __VIRT_SEVGUEST_H__
-#define __VIRT_SEVGUEST_H__
-
-#include <linux/types.h>
-
-#define MAX_AUTHTAG_LEN 32
-
-/* See SNP spec SNP_GUEST_REQUEST section for the structure */
-enum msg_type {
- SNP_MSG_TYPE_INVALID = 0,
- SNP_MSG_CPUID_REQ,
- SNP_MSG_CPUID_RSP,
- SNP_MSG_KEY_REQ,
- SNP_MSG_KEY_RSP,
- SNP_MSG_REPORT_REQ,
- SNP_MSG_REPORT_RSP,
- SNP_MSG_EXPORT_REQ,
- SNP_MSG_EXPORT_RSP,
- SNP_MSG_IMPORT_REQ,
- SNP_MSG_IMPORT_RSP,
- SNP_MSG_ABSORB_REQ,
- SNP_MSG_ABSORB_RSP,
- SNP_MSG_VMRK_REQ,
- SNP_MSG_VMRK_RSP,
-
- SNP_MSG_TYPE_MAX
-};
-
-enum aead_algo {
- SNP_AEAD_INVALID,
- SNP_AEAD_AES_256_GCM,
-};
-
-struct snp_guest_msg_hdr {
- u8 authtag[MAX_AUTHTAG_LEN];
- u64 msg_seqno;
- u8 rsvd1[8];
- u8 algo;
- u8 hdr_version;
- u16 hdr_sz;
- u8 msg_type;
- u8 msg_version;
- u16 msg_sz;
- u32 rsvd2;
- u8 msg_vmpck;
- u8 rsvd3[35];
-} __packed;
-
-struct snp_guest_msg {
- struct snp_guest_msg_hdr hdr;
- u8 payload[4000];
-} __packed;
-
-#endif /* __VIRT_SEVGUEST_H__ */
--
2.25.1
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