XenIo protocol to abstract arch specific details

The Xen implementations for the Intel and ARM architectures differ in the way the base address of the grant table is communicated to the guest. The former uses a virtual PCI device, while the latter uses a device tree node. In order to allow the XenBusDxe UEFI driver to be reused for the non-PCI Xen implementation, this abstract protocol can be installed on a handle with the appropriate base address.

SPDX-License-Identifier: BSD-2-Clause-Patent

PROTOCOL Information

PROTOCOL's Guid Name	PROTOCOL's Guid
gXenIoProtocolGuid	{0x6efac84f, 0x0ab0, 0x4747, {0x81, 0xbe, 0x85, 0x55, 0x62, 0x59, 0x04, 0x49}}

Refer to Header File

OvmfPkg/Include/Protocol/XenIo.h