[edk2-devel] [PATCH v3 29/35] OvmfPkg/PlatformBootManagerLib: Handle the absence of PCI bus on Xen PVH

[Anthony PERARD]

When running in a Xen PVH guest, there's nothing to do in
PciAcpiInitialization() because there isn't any PCI bus. When the Host
Bridge DID isn't recognised, simply continue. (The value of
PcdOvmfHostBridgePciDevId would be 0 because it isn't set.)

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
Signed-off-by: Anthony PERARD <anthony.perard at citrix.com>
---

Notes:
    v3:
    - Instead of checking for a false value,
      XEN_PVH_PCI_HOST_BRIDGE_DEVICE_ID, simply check if we are running xen
      when the HostBridge device ID isn't recognised.

 OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
index e32969e63e..9ae590293a 100644
--- a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
+++ b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
@@ -1209,6 +1209,12 @@ PciAcpiInitialization (
       PciWrite8 (PCI_LIB_ADDRESS (0, 0x1f, 0, 0x6b), 0x0b); // H

       break;

     default:

+      if (XenDetected ()) {

+        //

+        // There is no PCI bus in this case.

+        //

+        return;

+      }

       DEBUG ((EFI_D_ERROR, "%a: Unknown Host Bridge Device ID: 0x%04x\n",

         __FUNCTION__, mHostBridgeDevId));

       ASSERT (FALSE);

-- 
Anthony PERARD


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