Re: [PATCH v3 1/1] hw/arm/sbsa-ref: use XHCI to replace EHCI

[Peter Maydell]

On Tue, 6 Jun 2023 at 10:47, Marcin Juszkiewicz
<marcin.juszkiewicz@linaro.org> wrote:
>
> W dniu 5.06.2023 o 11:55, Yuquan Wang pisze:
> > The current sbsa-ref cannot use EHCI controller which is only
> > able to do 32-bit DMA, since sbsa-ref doesn't have RAM below 4GB.
> > Hence, this uses XHCI to provide a usb controller with 64-bit
> > DMA capablity instead of EHCI.
> >
> > Signed-off-by: Yuquan Wang<wangyuquan1236@phytium.com.cn>
>
> Reviewed-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
>
> Without EDK2 changes Linux behaves same way (no USB found), with EDK2
> changes (EHCI->XHCI) Linux gets USB devices.

So it doesn't break (cause to crash) old EDK2 images? That's a
pleasant surprise.

-- PMM