Skip host bridge setup on microvm.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3599
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
---
 OvmfPkg/PlatformPei/MemDetect.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/OvmfPkg/PlatformPei/MemDetect.c b/OvmfPkg/PlatformPei/MemDetect.c
index 2c2c4641ec8a..d736b85e0d90 100644
--- a/OvmfPkg/PlatformPei/MemDetect.c
+++ b/OvmfPkg/PlatformPei/MemDetect.c
@@ -135,6 +135,10 @@ QemuUc32BaseInitialization (
   UINT32 LowerMemorySize;
   UINT32 Uc32Size;
 
+  if (mHostBridgeDevId == 0xffff /* microvm */) {
+    return;
+  }
+
   if (mHostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {
     //
     // On q35, the 32-bit area that we'll mark as UC, through variable MTRRs,
-- 
2.31.1



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