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

[Marcin Juszkiewicz]

W dniu 6.06.2023 o 12:04, Peter Maydell pisze:
> 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.

In both cases with not modified EDK2 Linux behaves the same:

ehci-platform LNRO0D20:00: Error: DMA mask configuration failed
ehci-platform: probe of LNRO0D20:00 failed with error -5