OvmfPkg: drop redundant VendorID check in VirtioMmioDeviceLib

There is a DEBUG warning printout in VirtioMmioDeviceLib if the current
device's VendorID does not match the traditional 16-bit Red Hat PCIe
vendor ID used with virtio-pci. The virtio-mmio vendor ID is 32-bit and
has no connection to the PCIe registry.

Most specifically, this causes a bunch of noise when booting an AArch64
QEMU platform, since QEMU's virtio-mmio implementation used 'QEMU' as
the vendor ID:
VirtioMmioInit: Warning:
  The VendorId (0x554D4551) does not match the VirtIo VendorId (0x1AF4).

Drop the warning message.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Signed-off-by: Leif Lindholm <leif@nuviainc.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

1 files changed, 0 insertions, 15 deletions

diff --git a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.c b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.c
index 2f20272c14..6dbbba008c 100644
--- a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.c
+++ b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.c
@@ -58,7 +58,6 @@ VirtioMmioInit (
   )

 {

   UINT32     MagicValue;

-  UINT32     VendorId;

   UINT32     Version;

 

   //

@@ -84,20 +83,6 @@ VirtioMmioInit (
     return EFI_UNSUPPORTED;

   }

 

-  //

-  // Double-check MMIO-specific values

-  //

-  VendorId = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_VENDOR_ID);

-  if (VendorId != VIRTIO_VENDOR_ID) {

-    //

-    // The ARM Base and Foundation Models do not report a valid VirtIo VendorId.

-    // They return a value of 0x0 for the VendorId.

-    //

-    DEBUG((DEBUG_WARN, "VirtioMmioInit: Warning: The VendorId (0x%X) does not "

-                       "match the VirtIo VendorId (0x%X).\n",

-                       VendorId, VIRTIO_VENDOR_ID));

-  }

-

   return EFI_SUCCESS;

 }