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hw/i386/sev: Add function to get SEV metadata from OVMF header

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A recent version of OVMF expanded the reset vector GUID list to add
SEV-specific metadata GUID. The SEV metadata describes the reserved
memory regions such as the secrets and CPUID page used during the SEV-SNP
guest launch.

The pc_system_get_ovmf_sev_metadata_ptr() is used to retieve the SEV
metadata pointer from the OVMF GUID list.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
Message-ID: <20240530111643.1091816-19-pankaj.gupta@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Brijesh Singh 2024-05-30 06:16:30 -05:00 • committed by Paolo Bonzini
parent 3d44fdff60
commit f3c30c575d
5 changed files with 68 additions and 0 deletions
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4
hw/i386/pc_sysfw.c
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@ -260,6 +260,10 @@ void x86_firmware_configure(void *ptr, int size)
pc_system_parse_ovmf_flash(ptr, size);
if (sev_enabled()) {
/* Copy the SEV metadata table (if it exists) */
pc_system_parse_sev_metadata(ptr, size);
ret = sev_es_save_reset_vector(ptr, size);
if (ret) {
error_report("failed to locate and/or save reset vector");