Re: riscv64 virt board crash upon startup

[Marc-André Lureau]

Hi

On Fri, Sep 8, 2023 at 3:47 AM Laszlo Ersek <lersek@redhat.com> wrote:
>
> Question for Gerd below:
>
> On 9/7/23 14:29, Philippe Mathieu-Daudé wrote:
> > On 7/9/23 13:25, Laszlo Ersek wrote:
> >> This is with QEMU v8.1.0-391-gc152379422a2.
> >>
> >> I use the command line from (scroll to the bottom):
> >>
> >>    https://github.com/tianocore/edk2/commit/49f06b664018
> >>
> >> (with "-full-screen" removed).
> >>
> >> The crash is as follows:
> >>
> >>    Unexpected error in object_property_find_err() at
> >> ../../src/upstream/qemu/qom/object.c:1314:
> >>    qemu: Property 'qemu-fixed-text-console.device' not found
> >>    Aborted (core dumped)
> >
> > Cc'ing Marc-André for commit b208f745a8
> > ("ui/console: introduce different console objects")
>
[...]
> Gerd, here's the question for you: why are "device" and "head" QOM properties 
> in the first place? What are they needed for?
>

You get QOM tree introspection (ex: (qemu) qom-get
/backend/console[0]/device type). Other than that, I don't think it
brings anything else.

> I've found the following two commits:
> - aa2beaa1f57c ("console: add device link to QemuConsoles", 2013-04-25)
> - 5643706a0950 ("console: add head to index to qemu consoles.", 2014-03-05)
>
> But I don't understand *how* having a "link" helps for figuring out which 
> qemu console displays which device.
>
>