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Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv
From: |
Eduardo Habkost |
Subject: |
Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv |
Date: |
Mon, 9 Oct 2017 23:37:05 -0300 |
User-agent: |
Mutt/1.9.0 (2017-09-02) |
On Tue, Oct 10, 2017 at 04:31:40AM +0200, Thomas Huth wrote:
> On 09.10.2017 21:50, John Snow wrote:
> > Hi Thomas, I'm not particularly familiar with the various PPC flavors,
> > so please forgive me:
> >
> > Apparently isa-fdc fails to instantiate on powernv (which appears to
> > have an ISA bus) because through one way or another, we never call:
> >
> > isa_bus_dma, invoked by
> > DMA_init, invoked by, seemingly usually,
> > - i82374_realize in hw/dma/i82374.c
> >
> > by comparison, the prep board appears to use the i82378 which in turn
> > uses the 82374 which is how we get our ISA DMA initialization.
> >
> > pnv doesn't seem to have a DMA device on its ISA bus.
> >
> > Should the powernv board be initializing something like this, or is it
> > more correct to just disable the isa-fdc device for this board for now
> > and be done with it?
>
> I don't know the powernv board very well, but maybe Cédric could answer
> that question.
>
> For reference, I assume you're talking about this crash here:
>
> qemu-system-ppc64 -M powernv -device isa-fdc
> qemu-system-ppc64: hw/block/fdc.c:2703: isabus_fdc_realize: Assertion
> `fdctrl->dma' failed.
> Aborted (core dumped)
>
> ?
>
> IIRC Eduardo also posted a patch for that one already, not sure about
> the current status, though.
Eduardo Otubo posted a patch for a different case: assertion
failure inside DMA_init() when another device already called
DMA_init() (e.g. if two i82374 devices are instantiated). The
fix was to make i82374 non-user-creatable.
--
Eduardo
- [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, John Snow, 2017/10/09
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, Thomas Huth, 2017/10/09
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv,
Eduardo Habkost <=
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, Thomas Huth, 2017/10/09
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, Eduardo Habkost, 2017/10/09
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, Eduardo Otubo, 2017/10/10
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, John Snow, 2017/10/10
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, Philippe Mathieu-Daudé, 2017/10/11
- Re: [Qemu-ppc] device crash test -- isa-fdc on ppc64/powernv, Philippe Mathieu-Daudé, 2017/10/16