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Re: [Qemu-devel] [PATCH v2 0/7] ramfb: simple boot framebuffer, no legac
From: |
Laszlo Ersek |
Subject: |
Re: [Qemu-devel] [PATCH v2 0/7] ramfb: simple boot framebuffer, no legacy vga |
Date: |
Fri, 23 Mar 2018 19:29:20 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 |
On 03/23/18 18:07, Gerd Hoffmann wrote:
> On Fri, Mar 23, 2018 at 04:12:21PM +0100, Laszlo Ersek wrote:
>> On 03/23/18 15:51, Gerd Hoffmann wrote:
>>> Hi,
>>>
>>>> I believe the only point of this device model (and the associated guest
>>>> fw driver) is Windows-on-KVM/aarch64.
>>>
>>> The other one is vgpu boot display.
>>
>> Interesting. I know nearly nothing about vgpu, but I hoped it'd come
>> with its own UEFI GOP driver in the ROM BAR; similarly to assigned
>> physical GPUs.
>
> Well. They don't ...
>
> And even for assigned GPUs it is a PITA. For example the intel rom
> appears to have the pci slot hardcoded. You have to place the GPU in
> 00:02.0 (which it has on bare metal), otherwise the rom doesn't work.
> I would be *very* surprised if the rom is able to handle vgpu devices
> correctly. Beside that it isn't easy to get the rom in the first place,
> at least for intel, as it isn't stored in the rom bar but in the
> firmware flash.
Sure, IGD assignment is a different animal; I thought vgpu would follow
the discrete PCI card assignment case.
Anyway, I just wanted to educate myself on this; thanks!
Laszlo
- [Qemu-devel] [PATCH v2 6/7] hw/vfio/display: add ramfb support, (continued)
- [Qemu-devel] [PATCH v2 6/7] hw/vfio/display: add ramfb support, Gerd Hoffmann, 2018/03/23
- [Qemu-devel] [PATCH v2 5/7] hw/display: add virtio-ramfb, Gerd Hoffmann, 2018/03/23
- [Qemu-devel] [PATCH v2 4/7] hw/display: add ramfb-testdev, Gerd Hoffmann, 2018/03/23
- [Qemu-devel] [PATCH v2 7/7] [wip] hw/display: add qxl-ramfb, Gerd Hoffmann, 2018/03/23
- [Qemu-devel] [PATCH v2 3/7] hw/display: add ramfb, a simple boot framebuffer living in guest ram, Gerd Hoffmann, 2018/03/23
- [Qemu-devel] [PATCH v2 1/7] [testing] update bios, add vgabios-ramfb, Gerd Hoffmann, 2018/03/23
- Re: [Qemu-devel] [PATCH v2 0/7] ramfb: simple boot framebuffer, no legacy vga, Laszlo Ersek, 2018/03/23
- Re: [Qemu-devel] [PATCH v2 0/7] ramfb: simple boot framebuffer, no legacy vga, Ard Biesheuvel, 2018/03/23
[Qemu-devel] [PATCH v2 2/7] [testing] add ovmf build with ramfb support, Gerd Hoffmann, 2018/03/23