[vfio-users] AMD Radeon VII EFI support

[Kyle Marek]

Beware that Radeon VII seems to have launched without an EFI ROM.

My card does not appear to be the only one.

See: https://www.techpowerup.com/vgabios/208116/amd-radeonvii-16384-190116
See:
https://web.archive.org/web/20190210231028/https://www.techpowerup.com/vgabios/208116/amd-radeonvii-16384-190116

I am seeking support from the manufacturer to see if this can be
addressed. I will provide more details if they respond.

See:

kmarek at kyle.internal.gigabyteproductions.net ~/src/rom-parser
$ lspci -nn | grep VGA
03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Vega 20 [1002:66af] (rev c1)

kmarek at kyle.internal.gigabyteproductions.net ~
$ uname -a
Linux kyle.internal.gigabyteproductions.net 4.20.6-200.fc29.x86_64 #1 SMP Thu Jan 31 15:50:43 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

kmarek at kyle.internal.gigabyteproductions.net ~
$ echo 1 | sudo tee /sys/bus/pci/devices/0000:03:00.0/rom
1

kmarek at kyle.internal.gigabyteproductions.net ~
$ sudo cat /sys/bus/pci/devices/0000:03:00.0/rom > radeon.vii.rom

kmarek at kyle.internal.gigabyteproductions.net ~
$ echo 0 | sudo tee /sys/bus/pci/devices/0000:03:00.0/rom
0

kmarek at kyle.internal.gigabyteproductions.net ~
$ ~/src/rom-parser/rom-parser radeon.vii.rom
Valid ROM signature found @0h, PCIR offset 2c0h
	PCIR: type 0 (x86 PC-AT), vendor: 1002, device: 66af, class: 030000
	PCIR: revision 0, vendor revision: 1004
	Last image

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