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i386/tdx: Parse TDVF metadata for TDX VM

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After TDVF is loaded to bios MemoryRegion, it needs parse TDVF metadata.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250508150002.689633-19-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiaoyao Li 2025-05-08 10:59:24 -04:00 • committed by Paolo Bonzini
parent b65a6011d1
commit cb5d65a854
4 changed files with 20 additions and 0 deletions
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7
hw/i386/pc_sysfw.c
View file

@ -37,6 +37,7 @@
#include "hw/block/flash.h"
#include "system/kvm.h"
#include "target/i386/sev.h"
#include "kvm/tdx.h"
#define FLASH_SECTOR_SIZE 4096
@ -280,5 +281,11 @@ void x86_firmware_configure(hwaddr gpa, void *ptr, int size)
}
sev_encrypt_flash(gpa, ptr, size, &error_fatal);
} else if (is_tdx_vm()) {
ret = tdx_parse_tdvf(ptr, size);
if (ret) {
error_report("failed to parse TDVF for TDX VM");
exit(1);
}
}
}

5
target/i386/kvm/tdx-stub.c
View file

@ -8,3 +8,8 @@ int tdx_pre_create_vcpu(CPUState *cpu, Error **errp)
{
return -EINVAL;
}
int tdx_parse_tdvf(void *flash_ptr, int size)
{
return -EINVAL;
}

5
target/i386/kvm/tdx.c
View file

@ -382,6 +382,11 @@ int tdx_pre_create_vcpu(CPUState *cpu, Error **errp)
return 0;
}
int tdx_parse_tdvf(void *flash_ptr, int size)
{
return tdvf_parse_metadata(&tdx_guest->tdvf, flash_ptr, size);
}
static bool tdx_guest_get_sept_ve_disable(Object *obj, Error **errp)
{
TdxGuest *tdx = TDX_GUEST(obj);

3
target/i386/kvm/tdx.h
View file

@ -8,6 +8,7 @@
#endif
#include "confidential-guest.h"
#include "hw/i386/tdvf.h"
#define TYPE_TDX_GUEST "tdx-guest"
#define TDX_GUEST(obj) OBJECT_CHECK(TdxGuest, (obj), TYPE_TDX_GUEST)
@ -32,6 +33,7 @@ typedef struct TdxGuest {
char *mrownerconfig; /* base64 encoded sha348 digest */
MemoryRegion *tdvf_mr;
TdxFirmware tdvf;
} TdxGuest;
#ifdef CONFIG_TDX
@ -42,5 +44,6 @@ bool is_tdx_vm(void);
int tdx_pre_create_vcpu(CPUState *cpu, Error **errp);
void tdx_set_tdvf_region(MemoryRegion *tdvf_mr);
int tdx_parse_tdvf(void *flash_ptr, int size);
#endif /* QEMU_I386_TDX_H */