[PATCH] drm/i915/gvt: Emulate PCI expansion ROM base address register

[Zhenyu Wang]

On 2017.11.02 13:33:42 +0800, changbin.du at intel.com wrote:
> From: Changbin Du <changbin.du at intel.com>
> 
> Our vGPU doesn't have a device ROM, we need follow the PCI spec to
> report this info to drivers. Otherwise, we would see below errors.
> 
> Inspecting possible rom at 0xfe049000 (vd=8086:1912 bdf=00:10.0)
> qemu-system-x86_64: vfio-pci: Cannot read device rom at 00000000-0000-0000-0000-000000000001
> Device option ROM contents are probably invalid (check dmesg).
> Skip option ROM probe with rombar=0, or load from file with romfile=No option rom signature (got 4860)
> 
> I will also send a improvement patch to PCI subsystem related to PCI ROM.
> But no idea to omit below error, since no pattern to detect vbios shadow
> without touch its content.
> 0000:00:10.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x0000
> 
> Signed-off-by: Changbin Du <changbin.du at intel.com>
> ---

applied, thanks!

-- 
Open Source Technology Center, Intel ltd.

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