7c3c7877d8
* Update to QEMU v9.0.0 --------- Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Fabiano Rosas <farosas@suse.de> Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Cédric Le Goater <clg@redhat.com> Signed-off-by: Zheyu Ma <zheyuma97@gmail.com> Signed-off-by: Ido Plat <ido.plat@ibm.com> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com> Signed-off-by: Fiona Ebner <f.ebner@proxmox.com> Signed-off-by: Gregory Price <gregory.price@memverge.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Lorenz Brun <lorenz@brun.one> Signed-off-by: Yao Xingtao <yaoxt.fnst@fujitsu.com> Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr> Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Signed-off-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Avihai Horon <avihaih@nvidia.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Joonas Kankaala <joonas.a.kankaala@gmail.com> Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org> Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Zhao Liu <zhao1.liu@intel.com> Signed-off-by: Glenn Miles <milesg@linux.ibm.com> Signed-off-by: Oleg Sviridov <oleg.sviridov@red-soft.ru> Signed-off-by: Artem Chernyshev <artem.chernyshev@red-soft.ru> Signed-off-by: Yajun Wu <yajunw@nvidia.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Pierre-Clément Tosi <ptosi@google.com> Signed-off-by: Lei Wang <lei4.wang@intel.com> Signed-off-by: Wei Wang <wei.w.wang@intel.com> Signed-off-by: Martin Hundebøll <martin@geanix.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Signed-off-by: Wafer <wafer@jaguarmicro.com> Signed-off-by: Yuxue Liu <yuxue.liu@jaguarmicro.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Nguyen Dinh Phi <phind.uet@gmail.com> Signed-off-by: Zack Buhman <zack@buhman.org> Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Yuquan Wang wangyuquan1236@phytium.com.cn Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com> Signed-off-by: Cindy Lu <lulu@redhat.com> Co-authored-by: Peter Maydell <peter.maydell@linaro.org> Co-authored-by: Fabiano Rosas <farosas@suse.de> Co-authored-by: Peter Xu <peterx@redhat.com> Co-authored-by: Thomas Huth <thuth@redhat.com> Co-authored-by: Cédric Le Goater <clg@redhat.com> Co-authored-by: Zheyu Ma <zheyuma97@gmail.com> Co-authored-by: Ido Plat <ido.plat@ibm.com> Co-authored-by: Ilya Leoshkevich <iii@linux.ibm.com> Co-authored-by: Markus Armbruster <armbru@redhat.com> Co-authored-by: Marc-André Lureau <marcandre.lureau@redhat.com> Co-authored-by: Paolo Bonzini <pbonzini@redhat.com> Co-authored-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Co-authored-by: David Hildenbrand <david@redhat.com> Co-authored-by: Kevin Wolf <kwolf@redhat.com> Co-authored-by: Stefan Reiter <s.reiter@proxmox.com> Co-authored-by: Fiona Ebner <f.ebner@proxmox.com> Co-authored-by: Gregory Price <gregory.price@memverge.com> Co-authored-by: Lorenz Brun <lorenz@brun.one> Co-authored-by: Yao Xingtao <yaoxt.fnst@fujitsu.com> Co-authored-by: Philippe Mathieu-Daudé <philmd@linaro.org> Co-authored-by: Arnaud Minier <arnaud.minier@telecom-paris.fr> Co-authored-by: BALATON Zoltan <balaton@eik.bme.hu> Co-authored-by: Igor Mammedov <imammedo@redhat.com> Co-authored-by: Akihiko Odaki <akihiko.odaki@daynix.com> Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Co-authored-by: Sven Schnelle <svens@stackframe.org> Co-authored-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Co-authored-by: Helge Deller <deller@kernel.org> Co-authored-by: Harsh Prateek Bora <harshpb@linux.ibm.com> Co-authored-by: Benjamin Gray <bgray@linux.ibm.com> Co-authored-by: Nicholas Piggin <npiggin@gmail.com> Co-authored-by: Avihai Horon <avihaih@nvidia.com> Co-authored-by: Michael Tokarev <mjt@tls.msk.ru> Co-authored-by: Joonas Kankaala <joonas.a.kankaala@gmail.com> Co-authored-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org> Co-authored-by: Stefan Weil <sw@weilnetz.de> Co-authored-by: Dayu Liu <liu.dayu@zte.com.cn> Co-authored-by: Zhao Liu <zhao1.liu@intel.com> Co-authored-by: Glenn Miles <milesg@linux.vnet.ibm.com> Co-authored-by: Artem Chernyshev <artem.chernyshev@red-soft.ru> Co-authored-by: Yajun Wu <yajunw@nvidia.com> Co-authored-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Co-authored-by: Pierre-Clément Tosi <ptosi@google.com> Co-authored-by: Wei Wang <wei.w.wang@intel.com> Co-authored-by: Martin Hundebøll <martin@geanix.com> Co-authored-by: Michael S. Tsirkin <mst@redhat.com> Co-authored-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Co-authored-by: Wafer <wafer@jaguarmicro.com> Co-authored-by: lyx634449800 <yuxue.liu@jaguarmicro.com> Co-authored-by: Gerd Hoffmann <kraxel@redhat.com> Co-authored-by: Nguyen Dinh Phi <phind.uet@gmail.com> Co-authored-by: Zack Buhman <zack@buhman.org> Co-authored-by: Keith Packard <keithp@keithp.com> Co-authored-by: Yuquan Wang <wangyuquan1236@phytium.com.cn> Co-authored-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com> Co-authored-by: Cindy Lu <lulu@redhat.com>
49 lines
1.5 KiB
ReStructuredText
49 lines
1.5 KiB
ReStructuredText
==============
|
|
Best practices
|
|
==============
|
|
|
|
Debugging
|
|
=========
|
|
|
|
The migration stream can be analyzed thanks to ``scripts/analyze-migration.py``.
|
|
|
|
Example usage:
|
|
|
|
.. code-block:: shell
|
|
|
|
$ qemu-system-x86_64 -display none -monitor stdio
|
|
(qemu) migrate "exec:cat > mig"
|
|
(qemu) q
|
|
$ ./scripts/analyze-migration.py -f mig
|
|
{
|
|
"ram (3)": {
|
|
"section sizes": {
|
|
"pc.ram": "0x0000000008000000",
|
|
...
|
|
|
|
See also ``analyze-migration.py -h`` help for more options.
|
|
|
|
Firmware
|
|
========
|
|
|
|
Migration migrates the copies of RAM and ROM, and thus when running
|
|
on the destination it includes the firmware from the source. Even after
|
|
resetting a VM, the old firmware is used. Only once QEMU has been restarted
|
|
is the new firmware in use.
|
|
|
|
- Changes in firmware size can cause changes in the required RAMBlock size
|
|
to hold the firmware and thus migration can fail. In practice it's best
|
|
to pad firmware images to convenient powers of 2 with plenty of space
|
|
for growth.
|
|
|
|
- Care should be taken with device emulation code so that newer
|
|
emulation code can work with older firmware to allow forward migration.
|
|
|
|
- Care should be taken with newer firmware so that backward migration
|
|
to older systems with older device emulation code will work.
|
|
|
|
In some cases it may be best to tie specific firmware versions to specific
|
|
versioned machine types to cut down on the combinations that will need
|
|
support. This is also useful when newer versions of firmware outgrow
|
|
the padding.
|