From: Cleber Rosa <crosa@redhat.com>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: "Damien Hedde" <damien.hedde@greensocs.com>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Daniel P. Berrange" <berrange@redhat.com>,
"Eduardo Habkost" <ehabkost@redhat.com>,
"Mark Burton" <mark.burton@greensocs.com>,
"Alistair Francis" <alistair@alistair23.me>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
qemu-arm <qemu-arm@nongnu.org>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Edgar E. Iglesias" <edgar.iglesias@gmail.com>,
"Oksana Voshchana" <ovoshcha@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>
Subject: Re: [PATCH v6 0/9] Clock framework API
Date: Fri, 6 Dec 2019 07:46:13 -0500 [thread overview]
Message-ID: <20191206124613.GA3902@dhcp-17-72.bos.redhat.com> (raw)
In-Reply-To: <138ef325-dc9a-2ca5-9044-c67ffdabb968@redhat.com>
On Thu, Dec 05, 2019 at 12:01:56PM +0100, Philippe Mathieu-Daudé wrote:
>
> Understood, thanks for clearing this out!
>
> Side note, we don't do cross-arch migration testing, but we talked about
> having a 'different QEMU version' migration test. When we get a such test
> setup, it shouldn't be too difficult to evolve to some cross-arch migration
> test.
>
+Oksana,
Avocado-VT has had this as a core concept as far as I can remember, and
it's exposed even as a command line argument:
avocado run --help
...
[--vt-qemu-dst-bin VT_DST_QEMU_BIN]
...
Oksana is currently working on new migration test cases, and may consider
looking into adding "different QEMU version" support too.
PS: I have to say, though, that I'm trying to get my mind around
cross-arch migration being real.
- Cleber.
> > > I hope I'm wrong and confuse, this is a great news for me to know we
> > > can migrate floats!
> > >
> > > > Dave
> > > >
> > > > > > So we could store the frequency in clock out and migrate things there.
> > > > > > But since we have no way to ensure all clock out states are migrated
> > > > > > before some device fetch a ClockIn: we'll have to say "don't fetch one
> > > > > > of your ClockIn frequency during migration and migrate the value
> > > > > > yourself if you need it", pretty much like gpios.
> > > > > >
> > > > > > So we will probably migrate all ClockOut and almost all ClockIn.
> > > > > >
> > > > > > It would nice if we had a way to ensure clocks are migrated before
> > > > > > devices try to use them. But I don't think this is possible.
> > > > > >
> > > > > > --
> > > > > > Damien
> > > > > >
> > > > >
> > > > --
> > > > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
> > > >
> > >
> > --
> > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
> >
>
next prev parent reply other threads:[~2019-12-06 15:51 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-04 12:55 [Qemu-devel] [PATCH v6 0/9] Clock framework API Damien Hedde
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 1/9] hw/core/clock: introduce clock objects Damien Hedde
2019-11-25 13:07 ` Philippe Mathieu-Daudé
2019-11-25 13:37 ` Philippe Mathieu-Daudé
2019-12-03 15:14 ` Damien Hedde
2019-12-02 13:42 ` Peter Maydell
2019-12-03 15:28 ` Damien Hedde
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 2/9] hw/core/clock-vmstate: define a vmstate entry for clock state Damien Hedde
2019-11-25 13:05 ` Philippe Mathieu-Daudé
2019-12-02 13:44 ` Peter Maydell
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 3/9] qdev: add clock input&output support to devices Damien Hedde
2019-11-25 13:30 ` Philippe Mathieu-Daudé
2019-12-03 15:35 ` Damien Hedde
2019-12-02 14:34 ` Peter Maydell
2019-12-04 9:05 ` Damien Hedde
2019-12-04 9:53 ` Philippe Mathieu-Daudé
2019-12-04 11:58 ` Damien Hedde
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 4/9] qdev-monitor: print the device's clock with info qtree Damien Hedde
2019-12-02 14:35 ` Peter Maydell
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 5/9] qdev-clock: introduce an init array to ease the device construction Damien Hedde
2019-12-02 15:13 ` Peter Maydell
2019-12-04 11:04 ` Damien Hedde
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 6/9] docs/clocks: add device's clock documentation Damien Hedde
2019-12-02 15:17 ` Peter Maydell
2019-12-04 12:11 ` Damien Hedde
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 7/9] hw/misc/zynq_slcr: add clock generation for uarts Damien Hedde
2019-12-02 15:20 ` Peter Maydell
2019-12-04 12:51 ` Damien Hedde
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 8/9] hw/char/cadence_uart: add clock support Damien Hedde
2019-12-02 15:24 ` Peter Maydell
2019-12-04 13:35 ` Damien Hedde
2019-09-04 12:55 ` [Qemu-devel] [PATCH v6 9/9] hw/arm/xilinx_zynq: connect uart clocks to slcr Damien Hedde
2019-12-02 15:34 ` Peter Maydell
2019-12-03 14:59 ` Damien Hedde
2019-12-03 15:29 ` Philippe Mathieu-Daudé
2019-12-02 16:15 ` [PATCH v6 0/9] Clock framework API Peter Maydell
2019-12-04 16:40 ` Damien Hedde
2019-12-04 20:34 ` Philippe Mathieu-Daudé
2019-12-05 9:36 ` Damien Hedde
2019-12-05 9:59 ` Philippe Mathieu-Daudé
2019-12-05 10:21 ` Dr. David Alan Gilbert
2019-12-05 10:44 ` Philippe Mathieu-Daudé
2019-12-05 10:56 ` Dr. David Alan Gilbert
2019-12-05 11:01 ` Philippe Mathieu-Daudé
2019-12-06 12:46 ` Cleber Rosa [this message]
2019-12-06 13:48 ` Dr. David Alan Gilbert
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