UefiCpuPkg CpuCommFeaturesLib: Fix GP fault issue about ProcTrace

[mirror_edk2.git] / OvmfPkg / AcpiPlatformDxe / Xen.c

diff --git a/OvmfPkg/AcpiPlatformDxe/Xen.c b/OvmfPkg/AcpiPlatformDxe/Xen.c
index 357c60d23f4e3090ea893e0ca493bdf340060934..e4e47bf0e8626f9844d39fa8a4b197eb764c237e 100644 (file)
--- a/OvmfPkg/AcpiPlatformDxe/Xen.c
+++ b/OvmfPkg/AcpiPlatformDxe/Xen.c
@@ -295,8 +295,15 @@ InstallXenTables (
   }\r
 \r
   //\r
-  // Install DSDT table.\r
+  // Install DSDT table. If we reached this point without finding the DSDT,\r
+  // then we're out of sync with the hypervisor, and cannot continue.\r
   //\r
+  if (DsdtTable == NULL) {\r
+    DEBUG ((DEBUG_ERROR, "%a: no DSDT found\n", __FUNCTION__));\r
+    ASSERT (FALSE);\r
+    CpuDeadLoop ();\r
+  }\r
+\r
   Status = InstallAcpiTable (\r
              AcpiProtocol,\r
              DsdtTable,\r