i386/tdx: Parse TDVF metadata for TDX VM

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>

diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index 1eeb58ab37f9d8e028237a806cc4f067720c0ee7..821396c16e91d7bd933300b25f5298b82f128f32 100644 (file)
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -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);
+        }
     }
 }

diff --git a/target/i386/kvm/tdx-stub.c b/target/i386/kvm/tdx-stub.c
index 2344433594ea8bf550798125fcc644d871ee1b24..7748b6d0a44675645c022677d2d56c713493520d 100644 (file)
--- a/target/i386/kvm/tdx-stub.c
+++ b/target/i386/kvm/tdx-stub.c
@@ -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;
+}

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 0f5acbf980bdbc84d1c0fa8406787a35b836eeda..18beba2f5c30527191395048ccd54fe7c85003f5 100644 (file)
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -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);

diff --git a/target/i386/kvm/tdx.h b/target/i386/kvm/tdx.h
index b73461b8d8a34c7c05a9b6b99468dfefbc5a97b5..28a03c2a7b82bede13a89fd7f71100fd4004d1b2 100644 (file)
--- a/target/i386/kvm/tdx.h
+++ b/target/i386/kvm/tdx.h
@@ -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 */