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Mon, 03 Jun 2024 23:45:33 -0700 (PDT) X-Google-Smtp-Source: AGHT+IH6w+yFphJKXxZ7Hv1uk/Se2vv1lMWFUixy72s1hKJDznmempiWcF2D8FFKTHJI4rK1wpspwg== X-Received: by 2002:ac2:5dc1:0:b0:51c:778f:b569 with SMTP id 2adb3069b0e04-52b8956362bmr8294284e87.29.1717483532673; Mon, 03 Jun 2024 23:45:32 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Michael Roth , Pankaj Gupta Subject: [PULL 28/45] i386/sev: Update query-sev QAPI format to handle SEV-SNP Date: Tue, 4 Jun 2024 08:43:52 +0200 Message-ID: <20240604064409.957105-29-pbonzini@redhat.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240604064409.957105-1-pbonzini@redhat.com> References: <20240604064409.957105-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1717483819086100010 Content-Type: text/plain; charset="utf-8" From: Michael Roth 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 Co-developed-by:Pankaj Gupta Signed-off-by: Pankaj Gupta Message-ID: <20240530111643.1091816-15-pankaj.gupta@amd.com> Signed-off-by: Paolo Bonzini --- qapi/misc-target.json | 72 ++++++++++++++++++++++++++++++++++--------- target/i386/sev.h | 3 ++ target/i386/sev.c | 57 +++++++++++++++++++++------------- 3 files changed, 97 insertions(+), 35 deletions(-) diff --git a/qapi/misc-target.json b/qapi/misc-target.json index 4e0a6492a9a..2d7d4d89bd5 100644 --- a/qapi/misc-target.json +++ b/qapi/misc-target.json @@ -47,6 +47,50 @@ 'send-update', 'receive-update' ], 'if': 'TARGET_I386' } =20 +## +# @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. +# +# @snp-policy: SEV-SNP policy value +# +# Since: 9.1 +## +{ 'struct': 'SevSnpGuestInfo', + 'data': { 'snp-policy': 'uint64' }, + 'if': 'TARGET_I386' } + ## # @SevInfo: # @@ -60,25 +104,25 @@ # # @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' } + =20 ## # @query-sev: diff --git a/target/i386/sev.h b/target/i386/sev.h index 94295ee74f7..5dc4767b1e9 100644 --- a/target/i386/sev.h +++ b/target/i386/sev.h @@ -31,6 +31,9 @@ #define SEV_POLICY_DOMAIN 0x10 #define SEV_POLICY_SEV 0x20 =20 +#define SEV_SNP_POLICY_SMT 0x10000 +#define SEV_SNP_POLICY_DBG 0x80000 + typedef struct SevKernelLoaderContext { char *setup_data; size_t setup_size; diff --git a/target/i386/sev.c b/target/i386/sev.c index 072cc4f8530..43d1c48bd9e 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -363,25 +363,27 @@ static SevInfo *sev_get_info(void) { SevInfo *info; SevCommonState *sev_common =3D SEV_COMMON(MACHINE(qdev_get_machine())-= >cgs); - SevGuestState *sev_guest =3D - (SevGuestState *)object_dynamic_cast(OBJECT(sev_common), - TYPE_SEV_GUEST); =20 info =3D g_new0(SevInfo, 1); info->enabled =3D sev_enabled(); =20 if (info->enabled) { - if (sev_guest) { - info->handle =3D sev_guest->handle; - } info->api_major =3D sev_common->api_major; info->api_minor =3D sev_common->api_minor; info->build_id =3D sev_common->build_id; info->state =3D sev_common->state; - /* we only report the lower 32-bits of policy for SNP, ok for now.= .. */ - info->policy =3D - (uint32_t)object_property_get_uint(OBJECT(sev_common), - "policy", NULL); + + if (sev_snp_enabled()) { + info->sev_type =3D SEV_GUEST_TYPE_SEV_SNP; + info->u.sev_snp.snp_policy =3D + object_property_get_uint(OBJECT(sev_common), "policy", NUL= L); + } else { + info->sev_type =3D SEV_GUEST_TYPE_SEV; + info->u.sev.handle =3D SEV_GUEST(sev_common)->handle; + info->u.sev.policy =3D + (uint32_t)object_property_get_uint(OBJECT(sev_common), + "policy", NULL); + } } =20 return info; @@ -404,20 +406,33 @@ void hmp_info_sev(Monitor *mon, const QDict *qdict) { SevInfo *info =3D sev_get_info(); =20 - if (info && info->enabled) { - monitor_printf(mon, "handle: %d\n", info->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->policy & SEV_POLICY_NODBG ? "off" : "on"); - monitor_printf(mon, "key-sharing: %s\n", - info->policy & SEV_POLICY_NOKS ? "off" : "on"); - } else { + if (!info || !info->enabled) { monitor_printf(mon, "SEV is not enabled\n"); + goto out; } =20 + monitor_printf(mon, "SEV type: %s\n", SevGuestType_str(info->sev_type)= ); + 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); + + if (sev_snp_enabled()) { + monitor_printf(mon, "debug: %s\n", + info->u.sev_snp.snp_policy & SEV_SNP_POLICY_DBG ? "= on" + : "= off"); + monitor_printf(mon, "SMT allowed: %s\n", + info->u.sev_snp.snp_policy & SEV_SNP_POLICY_SMT ? "= on" + : "= off"); + } else { + monitor_printf(mon, "handle: %d\n", info->u.sev.handle); + 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"= ); + } + +out: qapi_free_SevInfo(info); } =20 --=20 2.45.1