Re: [Qemu-devel] [PATCH v6 1/2] hw/arm: Add arm SBSA reference machine, skeleton part

[Hongbo Zhang]

I would like to wait for more days to see if there are any further
comments, and if no I will send another iteration with memory map
slightly changed.

On Wed, 20 Mar 2019 at 18:27, Ard Biesheuvel <address@hidden> wrote:
>
> On Mon, 18 Mar 2019 at 03:39, Hongbo Zhang <address@hidden> wrote:
> >
> > On Fri, 15 Mar 2019 at 18:41, Ard Biesheuvel <address@hidden> wrote:
> > >
> > > On Fri, 15 Mar 2019 at 11:08, Hongbo Zhang <address@hidden> wrote:
> > > >
> > > > For the Aarch64, there is one machine 'virt', it is primarily meant to
> > > > run on KVM and execute virtualization workloads, but we need an
> > > > environment as faithful as possible to physical hardware, for supporting
> > > > firmware and OS development for pysical Aarch64 machines.
> > > >
> > > > This patch introduces new machine type 'sbsa-ref' with main features:
> > > >  - Based on 'virt' machine type.
> > > >  - A new memory map.
> > > >  - CPU type cortex-a57.
> > > >  - EL2 and EL3 are enabled.
> > > >  - GIC version 3.
> > > >  - System bus AHCI controller.
> > > >  - System bus EHCI controller.
> > >
> > > Hello Hongbo,
> > >
> > > Apologies for bringing this up now, but I seem to remember that the
> > > EHCI does not support 64-bit DMA. Did you run into any issues with
> > > this? Or was this fixed in QEMU in the mean time?
> > >
> > Hi Ard,
> > Which EHCI do you mean?
> > This time I use a newly introduced system bus EHCI, commit 114529f7
> > and I only tested USB mouse and key board, didn't test DMA function.
> >
>
> The host controller doesn't work without DMA, so if mouse and keyboard
> worked for you, and no DRAM exists below the 4 GB mark, this has
> apparently been fixed in QEMU.