[RFC,v3,25/36] i386/tdx: Add TDVF memory via KVM_TDX_INIT_MEM_REGION

Commit Message

Xiaoyao Li March 17, 2022, 1:59 p.m. UTC

From: Isaku Yamahata <[e-mail]>

TDVF firmware (CODE and VARS) needs to be added/copied to TD's private
memory via KVM_TDX_INIT_MEM_REGION, as well as TD HOB and TEMP memory.

Signed-off-by: Isaku Yamahata <[e-mail]>
Signed-off-by: Xiaoyao Li <[e-mail]>
---
 target/i386/kvm/tdx.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

Patch

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index f06a0895b77a..fc03079571a1 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -234,6 +234,7 @@  static void tdx_finalize_vm(Notifier *notifier, void *unused)
     void *base_ram_ptr = memory_region_get_ram_ptr(ms->ram);
     TdxFirmware *tdvf = &tdx_guest->tdvf;
     TdxFirmwareEntry *entry;
+    int r;
 
     tdx_init_ram_entries();
 
@@ -269,6 +270,23 @@  static void tdx_finalize_vm(Notifier *notifier, void *unused)
     tdvf_hob_create(tdx_guest, tdx_get_hob_entry(tdx_guest));
 
     tdx_post_init_vcpu();
+
+    for_each_tdx_fw_entry(tdvf, entry) {
+        struct kvm_tdx_init_mem_region mem_region = {
+            .source_addr = (__u64)entry->mem_ptr,
+            .gpa = entry->address,
+            .nr_pages = entry->size / 4096,
+        };
+
+        __u32 metadata = entry->attributes & TDVF_SECTION_ATTRIBUTES_MR_EXTEND ?
+                         KVM_TDX_MEASURE_MEMORY_REGION : 0;
+
+        r = tdx_vm_ioctl(KVM_TDX_INIT_MEM_REGION, metadata, &mem_region);
+        if (r < 0) {
+             error_report("KVM_TDX_INIT_MEM_REGION failed %s", strerror(-r));
+             exit(1);
+        }
+    }
 }
 
 static Notifier tdx_machine_done_notify = {