3ea1a80243
The SEV FW >= 0.23 added a new command that can be used to query the attestation report containing the SHA-256 digest of the guest memory and VMSA encrypted with the LAUNCH_UPDATE and sign it with the PEK. Note, we already have a command (LAUNCH_MEASURE) that can be used to query the SHA-256 digest of the guest memory encrypted through the LAUNCH_UPDATE. The main difference between previous and this command is that the report is signed with the PEK and unlike the LAUNCH_MEASURE command the ATTESATION_REPORT command can be called while the guest is running. Add a QMP interface "query-sev-attestation-report" that can be used to get the report encoded in base64. Cc: James Bottomley <jejb@linux.ibm.com> Cc: Tom Lendacky <Thomas.Lendacky@amd.com> Cc: Eric Blake <eblake@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: kvm@vger.kernel.org Reviewed-by: James Bottomley <jejb@linux.ibm.com> Tested-by: James Bottomley <jejb@linux.ibm.com> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Reviewed-by: Connor Kuehl <ckuehl@redhat.com> Message-Id: <20210429170728.24322-1-brijesh.singh@amd.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
84 lines
1.3 KiB
C
84 lines
1.3 KiB
C
/*
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* QEMU SEV stub
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*
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* Copyright Advanced Micro Devices 2018
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*
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* Authors:
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* Brijesh Singh <brijesh.singh@amd.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "sev_i386.h"
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SevInfo *sev_get_info(void)
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{
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return NULL;
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}
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bool sev_enabled(void)
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{
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return false;
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}
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uint64_t sev_get_me_mask(void)
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{
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return ~0;
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}
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uint32_t sev_get_cbit_position(void)
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{
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return 0;
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}
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uint32_t sev_get_reduced_phys_bits(void)
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{
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return 0;
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}
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char *sev_get_launch_measurement(void)
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{
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return NULL;
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}
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SevCapability *sev_get_capabilities(Error **errp)
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{
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error_setg(errp, "SEV is not available in this QEMU");
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return NULL;
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}
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int sev_inject_launch_secret(const char *hdr, const char *secret,
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uint64_t gpa, Error **errp)
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{
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return 1;
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}
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int sev_encrypt_flash(uint8_t *ptr, uint64_t len, Error **errp)
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{
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return 0;
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}
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bool sev_es_enabled(void)
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{
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return false;
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}
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void sev_es_set_reset_vector(CPUState *cpu)
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{
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}
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int sev_es_save_reset_vector(void *flash_ptr, uint64_t flash_size)
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{
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abort();
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}
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SevAttestationReport *
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sev_get_attestation_report(const char *mnonce, Error **errp)
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{
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error_setg(errp, "SEV is not available in this QEMU");
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return NULL;
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}
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