From 198a8dc9cd6222e40a71ecadbb50ef8e34c276de Mon Sep 17 00:00:00 2001
From: Anthony PERARD <anthony.perard@citrix.com>
Date: Tue, 13 Aug 2019 12:31:09 +0100
Subject: [PATCH] OvmfPkg/XenPlatformPei: Ignore missing PCI Host Bridge on Xen
 PVH

When the device ID of the host bridge is unknown, check if we are
running as a PVH guest as there is no PCI bus in that case.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20190813113119.14804-26-anthony.perard@citrix.com>
---
 OvmfPkg/XenPlatformPei/Platform.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/OvmfPkg/XenPlatformPei/Platform.c b/OvmfPkg/XenPlatformPei/Platform.c
index 2f42ca6ccd..717fd0ab1a 100644
--- a/OvmfPkg/XenPlatformPei/Platform.c
+++ b/OvmfPkg/XenPlatformPei/Platform.c
@@ -283,6 +283,12 @@ MiscInitialization (
       AcpiEnBit  = ICH9_ACPI_CNTL_ACPI_EN;
       break;
     default:
+      if (XenPvhDetected ()) {
+        //
+        // There is no PCI bus in this case
+        //
+        return;
+      }
       DEBUG ((DEBUG_ERROR, "%a: Unknown Host Bridge Device ID: 0x%04x\n",
         __FUNCTION__, mHostBridgeDevId));
       ASSERT (FALSE);