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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 --- qapi/misc-target.json | 72 ++++++++++++++++++++++++++++++++++--------- target/i386/sev.c | 55 +++++++++++++++++++++------------ target/i386/sev.h | 3 ++ 3 files changed, 96 insertions(+), 34 deletions(-) diff --git a/qapi/misc-target.json b/qapi/misc-target.json index 4e0a6492a9..2d7d4d89bd 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.c b/target/i386/sev.c index 8ca486f5d2..101661bf71 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -377,25 +377,27 @@ 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; @@ -418,20 +420,33 @@ 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); + if (!info || !info->enabled) { + monitor_printf(mon, "SEV is not enabled\n"); + goto out; + } + + 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->policy & SEV_POLICY_NODBG ? "off" : "on"); - monitor_printf(mon, "key-sharing: %s\n", - info->policy & SEV_POLICY_NOKS ? "off" : "on"); + 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, "SEV is not enabled\n"); + 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"= ); } =20 +out: qapi_free_SevInfo(info); } =20 diff --git a/target/i386/sev.h b/target/i386/sev.h index 94295ee74f..5dc4767b1e 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; --=20 2.34.1