From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: "Michael Mueller" <mimu@linux.vnet.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Alexander Graf" <agraf@suse.de>,
"Christian Borntraeger" <borntraeger@de.ibm.com>,
"Igor Mammedov" <imammedo@redhat.com>,
"Jiri Denemark" <jdenemar@redhat.com>,
"Richard Henderson" <rth@twiddle.net>,
"Andreas Färber" <afaerber@suse.de>,
"Eduardo Habkost" <ehabkost@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 0/2] target-i386: "custom" CPU model + script to dump existing CPU models
Date: Wed, 24 Jun 2015 16:56:18 +0200 [thread overview]
Message-ID: <558AC512.1000601@redhat.com> (raw)
In-Reply-To: <CAFEAcA--PKZxMJGs4dmR3d2wi6b4VDHRi33WzRJpAxOP+N9gmw@mail.gmail.com>
On 24/06/2015 16:54, Peter Maydell wrote:
> > It's certainly okay for libvirt and OpenStack to use the host CPU
> > features in order to check whether a node will run a given VM. However,
> > libvirt should trust that QEMU developers will not prevent a VM from
> > running on a previously viable host, just because you change the machine
> > type.
>
> Note that this might be true for x86 but isn't (in full generality)
> necessarily so for other architectures like ARM. For instance if
> you have a host machine with a GICv3 with no v2-back-compatibility
> support, then you can run a VM whose machine type specifies a GICv3,
> but not machine types that require a GICv2...
Hmm, that was too terse. Just because you change the machine type *to a
newer version* with the same chipset.
Paolo
next prev parent reply other threads:[~2015-06-24 14:56 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-08 19:07 [Qemu-devel] [PATCH 0/2] target-i386: "custom" CPU model + script to dump existing CPU models Eduardo Habkost
2015-06-08 19:07 ` [Qemu-devel] [PATCH 1/2] target-i386: Introduce "-cpu custom" Eduardo Habkost
2015-06-08 19:07 ` [Qemu-devel] [PATCH 2/2] scripts: x86-cpu-model-dump script Eduardo Habkost
2015-06-08 20:18 ` [Qemu-devel] [PATCH 0/2] target-i386: "custom" CPU model + script to dump existing CPU models Jiri Denemark
2015-06-09 8:56 ` Daniel P. Berrange
2015-06-09 13:16 ` Eduardo Habkost
2015-06-23 12:32 ` Andreas Färber
2015-06-23 15:08 ` Eduardo Habkost
2015-06-23 15:32 ` Michael S. Tsirkin
2015-06-23 15:58 ` Eduardo Habkost
2015-06-23 16:15 ` Andreas Färber
2015-06-23 16:25 ` Daniel P. Berrange
2015-06-23 16:33 ` Michael S. Tsirkin
2015-06-23 16:38 ` Eduardo Habkost
2015-06-23 16:44 ` Andreas Färber
2015-06-23 17:08 ` Eduardo Habkost
2015-06-23 17:18 ` Andreas Färber
2015-06-23 17:27 ` Daniel P. Berrange
2015-06-23 17:41 ` Andreas Färber
2015-06-23 17:45 ` Eduardo Habkost
2015-06-23 17:58 ` Andreas Färber
2015-06-23 18:05 ` Daniel P. Berrange
2015-06-23 18:11 ` Eduardo Habkost
2015-06-23 17:55 ` Daniel P. Berrange
2015-06-23 17:39 ` Eduardo Habkost
2015-06-23 18:35 ` Andreas Färber
2015-06-23 19:25 ` Eduardo Habkost
2015-06-23 19:41 ` Andreas Färber
2015-06-23 19:53 ` Eduardo Habkost
2015-06-23 20:26 ` Eduardo Habkost
2015-06-23 21:38 ` Michael S. Tsirkin
2015-06-23 16:42 ` Daniel P. Berrange
2015-06-23 16:47 ` Andreas Färber
2015-06-23 17:11 ` Eduardo Habkost
2015-06-23 21:34 ` Michael S. Tsirkin
2015-06-24 14:24 ` Eduardo Habkost
2015-06-24 14:37 ` Michael S. Tsirkin
2015-06-24 15:44 ` [Qemu-devel] Not introducing new host-side requirements on new machine-type versions (was Re: [PATCH 0/2] target-i386: "custom" CPU model + script to dump existing CPU models) Eduardo Habkost
2015-06-24 15:58 ` Andreas Färber
2015-06-24 16:08 ` Eduardo Habkost
2015-06-24 16:15 ` Andreas Färber
2015-06-24 15:59 ` Paolo Bonzini
2015-06-23 17:13 ` [Qemu-devel] [PATCH 0/2] target-i386: "custom" CPU model + script to dump existing CPU models Daniel P. Berrange
2015-06-23 17:29 ` Andreas Färber
2015-06-23 17:42 ` Eduardo Habkost
2015-06-23 17:55 ` Andreas Färber
2015-06-23 17:58 ` Daniel P. Berrange
2015-06-23 21:28 ` Michael S. Tsirkin
2015-06-24 14:18 ` Eduardo Habkost
2015-06-24 14:24 ` Michael S. Tsirkin
2015-06-23 21:26 ` Michael S. Tsirkin
2015-06-23 21:23 ` Michael S. Tsirkin
2015-06-24 8:52 ` Daniel P. Berrange
2015-06-24 10:31 ` Michael S. Tsirkin
2015-06-24 14:16 ` Eduardo Habkost
2015-06-24 14:19 ` Michael S. Tsirkin
2015-06-24 14:35 ` Andreas Färber
2015-06-24 14:57 ` Michael S. Tsirkin
2015-06-24 15:43 ` Andreas Färber
2015-06-24 14:38 ` Paolo Bonzini
2015-06-24 14:54 ` Peter Maydell
2015-06-24 14:56 ` Paolo Bonzini [this message]
2015-06-24 15:58 ` Eduardo Habkost
2015-06-24 16:00 ` Paolo Bonzini
2015-06-23 16:40 ` Andreas Färber
2015-06-23 16:53 ` Daniel P. Berrange
2015-06-23 17:10 ` Andreas Färber
2015-06-23 17:24 ` Eduardo Habkost
2015-06-23 17:31 ` Daniel P. Berrange
2015-06-23 16:32 ` Eduardo Habkost
2015-06-23 17:01 ` Andreas Färber
2015-06-23 15:51 ` Daniel P. Berrange
2015-06-23 15:56 ` Michael S. Tsirkin
2015-06-23 16:00 ` Daniel P. Berrange
2015-06-23 16:30 ` Michael S. Tsirkin
2015-06-24 9:20 ` Jiri Denemark
2015-06-24 10:21 ` Michael S. Tsirkin
2015-06-24 10:31 ` Daniel P. Berrange
2015-06-24 10:40 ` Michael S. Tsirkin
2015-06-24 10:32 ` Paolo Bonzini
2015-06-16 17:40 ` Eduardo Habkost
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=558AC512.1000601@redhat.com \
--to=pbonzini@redhat.com \
--cc=afaerber@suse.de \
--cc=agraf@suse.de \
--cc=borntraeger@de.ibm.com \
--cc=ehabkost@redhat.com \
--cc=imammedo@redhat.com \
--cc=jdenemar@redhat.com \
--cc=mimu@linux.vnet.ibm.com \
--cc=mst@redhat.com \
--cc=peter.maydell@linaro.org \
--cc=qemu-devel@nongnu.org \
--cc=rth@twiddle.net \
/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.