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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>
This commit is contained in:
Leif Lindholm 2020-09-12 17:19:57 +01:00 committed by mergify[bot]
parent 8028b2907e
commit 5648836987
1 changed files with 0 additions and 15 deletions
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15
OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.c
View File

@ -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;
}