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Tsirkin" , James Bottomley , "Dr . David Alan Gilbert" , Tom Lendacky , Paolo Bonzini , Dov Murik , David Gibson , =?utf-8?q?Daniel_P_=2E_Berrang?= =?utf-8?q?=C3=A9?= , kvm@vger.kernel.org, Eduardo Habkost , Brijesh Singh , Markus Armbruster , Eric Blake Subject: [RFC PATCH v2 12/12] i386/sev: update query-sev QAPI format to handle SEV-SNP Date: Thu, 26 Aug 2021 17:26:27 -0500 Message-Id: <20210826222627.3556-13-michael.roth@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210826222627.3556-1-michael.roth@amd.com> References: <20210826222627.3556-1-michael.roth@amd.com> X-ClientProxiedBy: SA0PR11CA0082.namprd11.prod.outlook.com (2603:10b6:806:d2::27) To CH2PR12MB4133.namprd12.prod.outlook.com (2603:10b6:610:7a::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost (165.204.77.1) by SA0PR11CA0082.namprd11.prod.outlook.com (2603:10b6:806:d2::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4457.18 via Frontend Transport; Thu, 26 Aug 2021 22:27:14 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5682fe39-3908-4abd-bdb5-08d968e0a78e X-MS-TrafficTypeDiagnostic: CH2PR12MB3925: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1091; 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envelope-from=Michael.Roth@amd.com; helo=NAM11-DM6-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Most of the current 'query-sev' command is relevant to both legacy SEV/SEV-ES guests and SEV-SNP guests, with 2 exceptions: - 'policy' is a 64-bit field for SEV-SNP, not 32-bit, and the meaning of the bit positions has changed - 'handle' is not relevant to SEV-SNP To address this, this patch adds a new 'sev-type' field that can be used as a discriminator to select between SEV and SEV-SNP-specific fields/formats without breaking compatibility for existing management tools (so long as management tools that add support for launching SEV-SNP guest update their handling of query-sev appropriately). The corresponding HMP command has also been fixed up similarly. Signed-off-by: Michael Roth --- qapi/misc-target.json | 71 +++++++++++++++++++++++++++++++++--------- target/i386/monitor.c | 29 +++++++++++++---- target/i386/sev.c | 22 +++++++------ target/i386/sev_i386.h | 3 ++ 4 files changed, 95 insertions(+), 30 deletions(-) diff --git a/qapi/misc-target.json b/qapi/misc-target.json index 3b05ad3dbf..80f994ff9b 100644 --- a/qapi/misc-target.json +++ b/qapi/misc-target.json @@ -81,6 +81,49 @@ 'send-update', 'receive-update' ], 'if': 'TARGET_I386' } +## +# @SevGuestType: +# +# An enumeration indicating the type of SEV guest being run. +# +# @sev: The guest is a legacy SEV or SEV-ES guest. +# @sev-snp: The guest is an SEV-SNP guest. +# +# Since: 6.2 +## +{ 'enum': 'SevGuestType', + 'data': [ 'sev', 'sev-snp' ], + 'if': 'TARGET_I386' } + +## +# @SevGuestInfo: +# +# Information specific to legacy SEV/SEV-ES guests. +# +# @policy: SEV policy value +# +# @handle: SEV firmware handle +# +# Since: 2.12 +## +{ 'struct': 'SevGuestInfo', + 'data': { 'policy': 'uint32', + 'handle': 'uint32' }, + 'if': 'TARGET_I386' } + +## +# @SevSnpGuestInfo: +# +# Information specific to SEV-SNP guests. +# +# @policy: SEV-SNP policy value +# +# Since: 6.2 +## +{ 'struct': 'SevSnpGuestInfo', + 'data': { 'policy': 'uint64' }, + 'if': 'TARGET_I386' } + ## # @SevInfo: # @@ -94,25 +137,25 @@ # # @build-id: SEV FW build id # -# @policy: SEV policy value -# # @state: SEV guest state # -# @handle: SEV firmware handle +# @sev-type: Type of SEV guest being run # # Since: 2.12 ## -{ 'struct': 'SevInfo', - 'data': { 'enabled': 'bool', - 'api-major': 'uint8', - 'api-minor' : 'uint8', - 'build-id' : 'uint8', - 'policy' : 'uint32', - 'state' : 'SevState', - 'handle' : 'uint32' - }, - 'if': 'TARGET_I386' -} +{ 'union': 'SevInfo', + 'base': { 'enabled': 'bool', + 'api-major': 'uint8', + 'api-minor' : 'uint8', + 'build-id' : 'uint8', + 'state' : 'SevState', + 'sev-type' : 'SevGuestType' }, + 'discriminator': 'sev-type', + 'data': { + 'sev': 'SevGuestInfo', + 'sev-snp': 'SevSnpGuestInfo' }, + 'if': 'TARGET_I386' } + ## # @query-sev: diff --git a/target/i386/monitor.c b/target/i386/monitor.c index 119211f0b0..85a8bc2bef 100644 --- a/target/i386/monitor.c +++ b/target/i386/monitor.c @@ -692,20 +692,37 @@ void hmp_info_sev(Monitor *mon, const QDict *qdict) { SevInfo *info = sev_get_info(); - if (info && info->enabled) { - monitor_printf(mon, "handle: %d\n", info->handle); + if (!info || !info->enabled) { + monitor_printf(mon, "SEV is not enabled\n"); + goto out; + } + + if (sev_snp_enabled()) { monitor_printf(mon, "state: %s\n", SevState_str(info->state)); monitor_printf(mon, "build: %d\n", info->build_id); monitor_printf(mon, "api version: %d.%d\n", info->api_major, info->api_minor); monitor_printf(mon, "debug: %s\n", - info->policy & SEV_POLICY_NODBG ? "off" : "on"); - monitor_printf(mon, "key-sharing: %s\n", - info->policy & SEV_POLICY_NOKS ? "off" : "on"); + info->u.sev_snp.policy & SEV_SNP_POLICY_DBG ? "on" + : "off"); + monitor_printf(mon, "SMT allowed: %s\n", + info->u.sev_snp.policy & SEV_SNP_POLICY_SMT ? "on" + : "off"); + monitor_printf(mon, "SEV type: %s\n", SevGuestType_str(info->sev_type)); } else { - monitor_printf(mon, "SEV is not enabled\n"); + monitor_printf(mon, "handle: %d\n", info->u.sev.handle); + monitor_printf(mon, "state: %s\n", SevState_str(info->state)); + monitor_printf(mon, "build: %d\n", info->build_id); + monitor_printf(mon, "api version: %d.%d\n", + info->api_major, info->api_minor); + monitor_printf(mon, "debug: %s\n", + info->u.sev.policy & SEV_POLICY_NODBG ? "off" : "on"); + monitor_printf(mon, "key-sharing: %s\n", + info->u.sev.policy & SEV_POLICY_NOKS ? "off" : "on"); + monitor_printf(mon, "SEV type: %s\n", SevGuestType_str(info->sev_type)); } +out: qapi_free_SevInfo(info); } diff --git a/target/i386/sev.c b/target/i386/sev.c index 72a6146295..fac2755e68 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -704,25 +704,27 @@ sev_get_info(void) { SevInfo *info; SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs); - SevGuestState *sev_guest = - (SevGuestState *)object_dynamic_cast(OBJECT(sev_common), - TYPE_SEV_GUEST); info = g_new0(SevInfo, 1); info->enabled = sev_enabled(); if (info->enabled) { - if (sev_guest) { - info->handle = sev_guest->handle; - } info->api_major = sev_common->api_major; info->api_minor = sev_common->api_minor; info->build_id = sev_common->build_id; info->state = sev_common->state; - /* we only report the lower 32-bits of policy for SNP, ok for now... */ - info->policy = - (uint32_t)object_property_get_uint(OBJECT(sev_common), - "policy", NULL); + + if (sev_snp_enabled()) { + info->sev_type = SEV_GUEST_TYPE_SEV_SNP; + info->u.sev_snp.policy = + object_property_get_uint(OBJECT(sev_common), "policy", NULL); + } else { + info->sev_type = SEV_GUEST_TYPE_SEV; + info->u.sev.handle = SEV_GUEST(sev_common)->handle; + info->u.sev.policy = + (uint32_t)object_property_get_uint(OBJECT(sev_common), + "policy", NULL); + } } return info; diff --git a/target/i386/sev_i386.h b/target/i386/sev_i386.h index e0e1a599be..948d8f1079 100644 --- a/target/i386/sev_i386.h +++ b/target/i386/sev_i386.h @@ -28,6 +28,9 @@ #define SEV_POLICY_DOMAIN 0x10 #define SEV_POLICY_SEV 0x20 +#define SEV_SNP_POLICY_SMT 0x10000 +#define SEV_SNP_POLICY_DBG 0x80000 + extern bool sev_es_enabled(void); extern bool sev_snp_enabled(void); extern uint64_t sev_get_me_mask(void);