[v6,13/16] backends/igvm: Process initialization sections in IGVM file

Commit Message

Roy Hopkins Sept. 26, 2024, 11:42 a.m. UTC

The initialization sections in IGVM files contain configuration that
should be applied to the guest platform before it is started. This
includes guest policy and other information that can affect the security
level and the startup measurement of a guest.

This commit introduces handling of the initialization sections during
processing of the IGVM file.

Signed-off-by: Roy Hopkins <[e-mail]>
Acked-by: Michael S. Tsirkin <[e-mail]>
Reviewed-by: Stefano Garzarella <[e-mail]>
---
 backends/igvm.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

Patch

diff --git a/backends/igvm.c b/backends/igvm.c
index 4dfc9b0c67..cbe833db9d 100644
--- a/backends/igvm.c
+++ b/backends/igvm.c
@@ -787,6 +787,27 @@  int qigvm_process_file(IgvmCfg *cfg, ConfidentialGuestSupport *cgs,
         }
     }
 
+    header_count =
+        igvm_header_count(ctx.file, IGVM_HEADER_SECTION_INITIALIZATION);
+    if (header_count < 0) {
+        error_setg(
+            errp,
+            "Invalid initialization header count in IGVM file. Error code: %X",
+            header_count);
+        goto cleanup_parameters;
+    }
+
+    for (ctx.current_header_index = 0;
+         ctx.current_header_index < (unsigned)header_count;
+         ctx.current_header_index++) {
+        IgvmVariableHeaderType type =
+            igvm_get_header_type(ctx.file, IGVM_HEADER_SECTION_INITIALIZATION,
+                                 ctx.current_header_index);
+        if (qigvm_handler(&ctx, type, errp) < 0) {
+            goto cleanup_parameters;
+        }
+    }
+
     /*
      * Contiguous pages of data with compatible flags are grouped together in
      * order to reduce the number of memory regions we create. Make sure the