From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Roger Pau Monne <roger.pau@citrix.com>, xen-devel@lists.xenproject.org
Cc: Ian Jackson <ian.jackson@eu.citrix.com>,
Wei Liu <wei.liu2@citrix.com>,
Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH v6 29/29] libxl: add support for migrating HVM guests without a device model
Date: Thu, 10 Sep 2015 17:30:04 +0100 [thread overview]
Message-ID: <55F1B00C.2060506@citrix.com> (raw)
In-Reply-To: <1441368548-43465-30-git-send-email-roger.pau@citrix.com>
On 04/09/15 13:09, Roger Pau Monne wrote:
> Only some minor libxl changes are needed in order to be able to migrate HVM
> guests without a device model, no hypervisor changes are needed.
>
> This change adds support for LIBXL_DEVICE_MODEL_VERSION_NONE into the
> migration code.
>
> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
IMO, this is conceptually wrong.
No device model should be signified by not sending an emulator record.
Sending an emulator record saying "No emulator" is pointless in a single
emulator setup, and wrong for a multi-emulator setup.
Furthermore, for situations like vGPU with no-dm guests, there will
actually be an emulator record sent for demu (The component XenServer
currently uses to make vGPU function).
On the save side, if the domain has no emulator, no EMULATOR_* records
should be sent.
On the receive side the domain configuration has already been sent so
the domain is known to not have an emulator. The arrival of an
EMULATOR_* record should be a fatal error for restore.
Support for migration of no-dm guests does not require any extension to
the migration ABI. Having said this, the libxl spec does not have a
"LAYOUT" section like the libxc spec, and might benefit from having one.
~Andrew
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2015-09-10 16:30 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-04 12:08 [PATCH v6 00/29] Introduce HVM without dm and new boot ABI Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 01/29] libxc: split x86 HVM setup_guest into smaller logical functions Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 02/29] libxc: unify xc_dom_p2m_{host/guest} Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 03/29] libxc: introduce the notion of a container type Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 04/29] libxc: introduce a domain loader for HVM guest firmware Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 05/29] libxc: make arch_setup_meminit a xc_dom_arch hook Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 06/29] libxc: make arch_setup_boot{init/late} xc_dom_arch hooks Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 07/29] libxc: rework BSP initialization Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 08/29] libxc: introduce a xc_dom_arch for hvm-3.0-x86_32 guests Roger Pau Monne
2015-09-18 15:53 ` Anthony PERARD
2015-09-23 10:32 ` Roger Pau Monné
2015-09-04 12:08 ` [PATCH v6 09/29] libxl: switch HVM domain building to use xc_dom_* helpers Roger Pau Monne
2015-09-18 15:53 ` Anthony PERARD
2015-09-23 10:38 ` Roger Pau Monné
2015-09-04 12:08 ` [PATCH v6 10/29] libxc: remove dead HVM building code Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 11/29] xen/x86: add bitmap of enabled emulated devices Roger Pau Monne
2015-09-04 12:25 ` Wei Liu
2015-09-04 13:51 ` Roger Pau Monné
2015-09-04 13:55 ` Jan Beulich
2015-09-04 22:41 ` Andrew Cooper
2015-09-23 11:43 ` Roger Pau Monné
2015-09-04 13:56 ` Wei Liu
2015-09-09 14:27 ` Wei Liu
2015-09-16 9:50 ` Jan Beulich
2015-09-23 12:35 ` Roger Pau Monné
2015-09-23 13:24 ` Jan Beulich
2015-09-23 15:02 ` Roger Pau Monné
2015-09-16 10:10 ` Jan Beulich
2015-09-23 12:42 ` Roger Pau Monné
2015-09-23 12:46 ` Andrew Cooper
2015-09-04 12:08 ` [PATCH v6 12/29] xen/x86: allow disabling the emulated local apic Roger Pau Monne
2015-09-16 10:05 ` Jan Beulich
2015-09-23 15:45 ` Roger Pau Monné
2015-09-24 7:57 ` Jan Beulich
2015-09-25 9:00 ` Roger Pau Monné
2015-09-04 12:08 ` [PATCH v6 13/29] xen/x86: allow disabling the emulated HPET Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 14/29] xen/x86: allow disabling the pmtimer Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 15/29] xen/x86: allow disabling the emulated RTC Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 16/29] xen/x86: allow disabling the emulated IO APIC Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 17/29] xen/x86: allow disabling the emulated PIC Roger Pau Monne
2015-09-21 14:34 ` Jan Beulich
2015-09-25 15:01 ` Roger Pau Monné
2015-09-04 12:08 ` [PATCH v6 18/29] xen/x86: allow disabling the emulated pmu Roger Pau Monne
2015-09-21 14:36 ` Jan Beulich
2015-09-21 14:48 ` Boris Ostrovsky
2015-09-25 15:07 ` Roger Pau Monné
2015-09-25 15:13 ` Jan Beulich
2015-09-25 15:22 ` Roger Pau Monné
2015-09-25 15:41 ` Boris Ostrovsky
2015-09-04 12:08 ` [PATCH v6 19/29] xen/x86: allow disabling the emulated VGA Roger Pau Monne
2015-09-04 12:08 ` [PATCH v6 20/29] xen/x86: allow disabling the emulated IOMMU Roger Pau Monne
2015-09-28 13:58 ` Aravind Gopalakrishnan
2015-09-04 12:09 ` [PATCH v6 21/29] xen/x86: allow disabling all emulated devices inside of Xen Roger Pau Monne
2015-09-04 12:09 ` [PATCH v6 22/29] elfnotes: intorduce a new PHYS_ENTRY elfnote Roger Pau Monne
2015-09-21 14:47 ` Jan Beulich
2015-09-28 10:35 ` Roger Pau Monné
2015-09-28 10:56 ` Jan Beulich
2015-09-28 10:59 ` Andrew Cooper
2015-09-04 12:09 ` [PATCH v6 23/29] libxc: allow creating domains without emulated devices Roger Pau Monne
2015-09-04 12:09 ` [PATCH v6 24/29] xen/x86: allow HVM guests to use hypercalls to bring up vCPUs Roger Pau Monne
2015-09-21 15:44 ` Jan Beulich
2015-09-25 15:16 ` Andrew Cooper
2015-09-25 15:52 ` Jan Beulich
2015-09-28 16:09 ` Roger Pau Monné
2015-09-29 7:09 ` Jan Beulich
2015-09-29 8:53 ` Tim Deegan
2015-09-29 10:00 ` Andrew Cooper
2015-09-29 10:07 ` Jan Beulich
2015-09-29 10:25 ` Andrew Cooper
2015-09-29 10:33 ` Jan Beulich
2015-09-29 10:37 ` Andrew Cooper
2015-09-29 10:48 ` Jan Beulich
2015-09-29 14:01 ` Roger Pau Monné
2015-09-29 15:29 ` Jan Beulich
2015-09-29 16:01 ` Roger Pau Monné
2015-09-29 16:20 ` Jan Beulich
2015-09-29 16:49 ` Roger Pau Monné
2015-09-29 16:58 ` Roger Pau Monné
2015-09-30 10:03 ` Jan Beulich
2015-09-30 11:37 ` Roger Pau Monné
2015-09-30 11:49 ` Andrew Cooper
2015-09-30 11:54 ` Jan Beulich
2015-09-30 12:19 ` Roger Pau Monné
2015-09-30 12:35 ` Jan Beulich
2015-09-30 12:50 ` Andrew Cooper
2015-09-30 15:33 ` Roger Pau Monné
2015-09-30 14:23 ` Roger Pau Monné
2015-09-30 15:41 ` Jan Beulich
2015-09-04 12:09 ` [PATCH v6 25/29] xenconsole: try to attach to PV console if HVM fails Roger Pau Monne
2015-09-04 12:09 ` [PATCH v6 26/29] libxc/xen: introduce a start info structure for HVMlite guests Roger Pau Monne
2015-09-10 16:00 ` Wei Liu
2015-09-21 15:53 ` Jan Beulich
2015-09-28 16:51 ` Roger Pau Monné
2015-09-04 12:09 ` [PATCH v6 27/29] libxc: switch xc_dom_elfloader to be used with HVMlite domains Roger Pau Monne
2015-09-04 12:09 ` [PATCH v6 28/29] libxl: allow the creation of HVM domains without a device model Roger Pau Monne
2015-09-04 12:09 ` [PATCH v6 29/29] libxl: add support for migrating HVM guests " Roger Pau Monne
2015-09-10 16:00 ` Wei Liu
2015-09-10 16:30 ` Andrew Cooper [this message]
2015-09-11 13:04 ` [PATCH v6 00/29] Introduce HVM without dm and new boot ABI Ian Campbell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=55F1B00C.2060506@citrix.com \
--to=andrew.cooper3@citrix.com \
--cc=ian.campbell@citrix.com \
--cc=ian.jackson@eu.citrix.com \
--cc=roger.pau@citrix.com \
--cc=wei.liu2@citrix.com \
--cc=xen-devel@lists.xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.