Re: [edk2-devel][PATCH v1 1/1] ArmVirtPkg: ArmVirtQemu: Add Graphics and Input

["Gerd Hoffmann" <kraxel@redhat.com>]

On Sat, Aug 19, 2023 at 11:10:07PM +0100, Pedro Falcato wrote:
> On Sat, Aug 19, 2023 at 8:39 PM Marcin Juszkiewicz
> <marcin.juszkiewicz@linaro.org> wrote:
> >
> > W dniu 18.08.2023 o 20:17, Oliver Smith-Denny pisze:
> > > Currently, unlike OVMF, ArmVirtQemu does not display any graphics, only
> > > the QEMU monitor. Graphics are helpful to confirm booting into an OS is
> > > successful, interacting with the EFI shell while getting separate
> > > logging messages, etc.
> >
> > Ah, that "but on x86 it is different" again ;D
> >
> > I asked QEMU (and libvirt) devs in past why AArch64/virt lacks USB while
> > both x86/pc and x86/q35 have it. The answer was something like "it was a
> > mistake we do not plan to repeat". And hint that whatever uses either
> > QEMU or libvirt should take care of adding hardware they expect.
> 
> I don't think x86 having USB was a mistake. PIIX4 (the "pc" machine)
> already had USB 1.0, Q35 (ICH9) had USB 2.0 too. Not emulating those
> automatically would be a mistake from the faithfulness PoV. If they
> wanted to have a bare board, the option of just adding a virt board
> variant with the bare minimum (PCIe and ACPI, like arm64 and riscv64
> do) is a fine idea.

x86 microvm is very close to arm virt.
There is even a ovmf variant for it ;)

take care,
  Gerd



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