[v6,19/60] i386/tdx: Parse TDVF metadata for TDX VM

Commit Message

Xiaoyao Li Nov. 5, 2024, 6:23 a.m. UTC

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

Signed-off-by: Xiaoyao Li <[e-mail]>
Acked-by: Gerd Hoffmann <[e-mail]>
---
 hw/i386/pc_sysfw.c         | 7 +++++++
 target/i386/kvm/tdx-stub.c | 5 +++++
 target/i386/kvm/tdx.c      | 5 +++++
 target/i386/kvm/tdx.h      | 3 +++
 4 files changed, 20 insertions(+)

Patch

diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index ef80281d28bb..5a373bf129a1 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -37,6 +37,7 @@ 
 #include "hw/block/flash.h"
 #include "sysemu/kvm.h"
 #include "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 b614b46d3f4a..a064d583d393 100644
--- a/target/i386/kvm/tdx-stub.c
+++ b/target/i386/kvm/tdx-stub.c
@@ -6,3 +6,8 @@  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 d5ebc2430fd1..334dbe95cc77 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -338,6 +338,11 @@  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 e5d836805385..6b7926be3efe 100644
--- a/target/i386/kvm/tdx.h
+++ b/target/i386/kvm/tdx.h
@@ -6,6 +6,7 @@ 
 #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)
@@ -30,6 +31,7 @@  typedef struct TdxGuest {
     char *mrownerconfig;    /* base64 encoded sha348 digest */
 
     MemoryRegion *tdvf_mr;
+    TdxFirmware tdvf;
 } TdxGuest;
 
 #ifdef CONFIG_TDX
@@ -40,5 +42,6 @@  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 */