From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Ram Pai <linuxram@us.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>,
pair@us.ibm.com, brijesh.singh@amd.com, kvm@vger.kernel.org,
"Michael S. Tsirkin" <mst@redhat.com>,
qemu-devel@nongnu.org, frankja@linux.ibm.com, david@redhat.com,
mdroth@linux.vnet.ibm.com, Halil Pasic <pasic@linux.ibm.com>,
borntraeger@de.ibm.com,
David Gibson <david@gibson.dropbear.id.au>,
thuth@redhat.com, Eduardo Habkost <ehabkost@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Greg Kurz <groug@kaod.org>,
dgilbert@redhat.com, qemu-s390x@nongnu.org, rth@twiddle.net,
Marcelo Tosatti <mtosatti@redhat.com>,
qemu-ppc@nongnu.org, pbonzini@redhat.com
Subject: Re: Re: [for-6.0 v5 11/13] spapr: PEF: prevent migration
Date: Tue, 19 Jan 2021 09:59:27 +0000 [thread overview]
Message-ID: <20210119095927.GB1830870@redhat.com> (raw)
In-Reply-To: <20210115185514.GB24076@ram-ibm-com.ibm.com>
On Fri, Jan 15, 2021 at 10:55:14AM -0800, Ram Pai wrote:
> On Wed, Jan 13, 2021 at 09:06:29AM +0100, Cornelia Huck wrote:
> > On Tue, 12 Jan 2021 10:55:11 -0800
> > Ram Pai <linuxram@us.ibm.com> wrote:
> >
> > > On Tue, Jan 12, 2021 at 09:19:43AM +0100, Cornelia Huck wrote:
> > > Actually the two options are inherently NOT incompatible. Halil also
> > > mentioned this in one of his replies.
> > >
> > > Its just that the current implementation is lacking, which will be fixed
> > > in the near future.
> > >
> > > We can design it upfront, with the assumption that they both are compatible.
> > > In the short term disable one; preferrably the secure-object, if both
> > > options are specified. In the long term, remove the restriction, when
> > > the implemetation is complete.
> >
> > Can't we simply mark the object as non-migratable now, and then remove
> > that later? I don't see what is so special about it.
>
> This is fine too.
>
> However I am told that libvirt has some assumptions, where it assumes
> that the VM is guaranteed to be migratable if '--only-migratable' is
> specified. Silently turning off that option can be bad.
TO be clear libvirt does *not* currently use --only-migratable.
What you're describing here is QEMU's own definition of this flag
$ qemu-system-x86_64 | grep migratable
-only-migratable allow only migratable devices
Regards,
Daniel
--
|: https://berrange.com -o- https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org -o- https://fstop138.berrange.com :|
|: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
WARNING: multiple messages have this Message-ID (diff)
From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Ram Pai <linuxram@us.ibm.com>
Cc: pair@us.ibm.com, Cornelia Huck <cohuck@redhat.com>,
brijesh.singh@amd.com, kvm@vger.kernel.org,
"Michael S. Tsirkin" <mst@redhat.com>,
qemu-devel@nongnu.org, frankja@linux.ibm.com, david@redhat.com,
mdroth@linux.vnet.ibm.com, Halil Pasic <pasic@linux.ibm.com>,
borntraeger@de.ibm.com,
David Gibson <david@gibson.dropbear.id.au>,
thuth@redhat.com, Eduardo Habkost <ehabkost@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Greg Kurz <groug@kaod.org>,
dgilbert@redhat.com, qemu-s390x@nongnu.org, rth@twiddle.net,
Marcelo Tosatti <mtosatti@redhat.com>,
qemu-ppc@nongnu.org, pbonzini@redhat.com
Subject: Re: Re: [for-6.0 v5 11/13] spapr: PEF: prevent migration
Date: Tue, 19 Jan 2021 09:59:27 +0000 [thread overview]
Message-ID: <20210119095927.GB1830870@redhat.com> (raw)
In-Reply-To: <20210115185514.GB24076@ram-ibm-com.ibm.com>
On Fri, Jan 15, 2021 at 10:55:14AM -0800, Ram Pai wrote:
> On Wed, Jan 13, 2021 at 09:06:29AM +0100, Cornelia Huck wrote:
> > On Tue, 12 Jan 2021 10:55:11 -0800
> > Ram Pai <linuxram@us.ibm.com> wrote:
> >
> > > On Tue, Jan 12, 2021 at 09:19:43AM +0100, Cornelia Huck wrote:
> > > Actually the two options are inherently NOT incompatible. Halil also
> > > mentioned this in one of his replies.
> > >
> > > Its just that the current implementation is lacking, which will be fixed
> > > in the near future.
> > >
> > > We can design it upfront, with the assumption that they both are compatible.
> > > In the short term disable one; preferrably the secure-object, if both
> > > options are specified. In the long term, remove the restriction, when
> > > the implemetation is complete.
> >
> > Can't we simply mark the object as non-migratable now, and then remove
> > that later? I don't see what is so special about it.
>
> This is fine too.
>
> However I am told that libvirt has some assumptions, where it assumes
> that the VM is guaranteed to be migratable if '--only-migratable' is
> specified. Silently turning off that option can be bad.
TO be clear libvirt does *not* currently use --only-migratable.
What you're describing here is QEMU's own definition of this flag
$ qemu-system-x86_64 | grep migratable
-only-migratable allow only migratable devices
Regards,
Daniel
--
|: https://berrange.com -o- https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org -o- https://fstop138.berrange.com :|
|: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
next prev parent reply other threads:[~2021-01-19 14:47 UTC|newest]
Thread overview: 186+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 5:44 [for-6.0 v5 00/13] Generalize memory encryption models David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-04 5:44 ` [for-6.0 v5 01/13] qom: Allow optional sugar props David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-04 12:57 ` Cornelia Huck
2020-12-04 12:57 ` Cornelia Huck
2020-12-14 21:25 ` Eduardo Habkost
2020-12-14 21:25 ` Eduardo Habkost
2021-01-11 18:04 ` Philippe Mathieu-Daudé
2021-01-11 18:04 ` Philippe Mathieu-Daudé
2020-12-04 5:44 ` [for-6.0 v5 02/13] securable guest memory: Introduce new securable guest memory base class David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-04 5:44 ` [for-6.0 v5 03/13] securable guest memory: Handle memory encryption via interface David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-04 13:10 ` Cornelia Huck
2020-12-04 13:10 ` Cornelia Huck
2021-01-08 4:03 ` David Gibson
2021-01-08 4:03 ` David Gibson
2021-01-12 3:49 ` David Gibson
2021-01-12 3:49 ` David Gibson
2020-12-04 5:44 ` [for-6.0 v5 04/13] securable guest memory: Move side effect out of machine_set_memory_encryption() David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-04 5:44 ` [for-6.0 v5 05/13] securable guest memory: Rework the "memory-encryption" property David Gibson
2020-12-04 5:44 ` David Gibson
2021-01-11 18:09 ` Philippe Mathieu-Daudé
2021-01-11 18:09 ` Philippe Mathieu-Daudé
2020-12-04 5:44 ` [for-6.0 v5 06/13] securable guest memory: Decouple kvm_memcrypt_*() helpers from KVM David Gibson
2020-12-04 5:44 ` David Gibson
2021-01-11 18:13 ` Philippe Mathieu-Daudé
2021-01-11 18:13 ` Philippe Mathieu-Daudé
2021-01-12 3:03 ` David Gibson
2021-01-12 3:03 ` David Gibson
2020-12-04 5:44 ` [for-6.0 v5 07/13] sev: Add Error ** to sev_kvm_init() David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-14 16:50 ` Cornelia Huck
2020-12-14 16:50 ` Cornelia Huck
2020-12-04 5:44 ` [for-6.0 v5 08/13] securable guest memory: Introduce sgm "ready" flag David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-14 17:00 ` Cornelia Huck
2020-12-14 17:00 ` Cornelia Huck
2020-12-17 5:38 ` David Gibson
2020-12-17 5:38 ` David Gibson
2020-12-17 11:24 ` Cornelia Huck
2020-12-17 11:24 ` Cornelia Huck
2020-12-04 5:44 ` [for-6.0 v5 09/13] securable guest memory: Move SEV initialization into arch specific code David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-04 5:44 ` [for-6.0 v5 10/13] spapr: Add PEF based securable guest memory David Gibson
2020-12-04 5:44 ` David Gibson
2021-01-05 23:34 ` Ram Pai
2021-01-05 23:34 ` Ram Pai
2021-01-08 0:34 ` David Gibson
2021-01-08 0:34 ` David Gibson
2020-12-04 5:44 ` [for-6.0 v5 11/13] spapr: PEF: prevent migration David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-14 17:22 ` Cornelia Huck
2020-12-14 17:22 ` Cornelia Huck
2020-12-17 5:47 ` David Gibson
2020-12-17 5:47 ` David Gibson
2020-12-17 11:38 ` Cornelia Huck
2020-12-17 11:38 ` Cornelia Huck
2020-12-17 14:15 ` Greg Kurz
2020-12-17 14:15 ` Greg Kurz
2020-12-18 11:41 ` Cornelia Huck
2020-12-18 11:41 ` Cornelia Huck
2020-12-18 12:08 ` Dr. David Alan Gilbert
2020-12-18 12:08 ` Dr. David Alan Gilbert
2021-01-04 7:15 ` Ram Pai
2021-01-04 7:15 ` Ram Pai
2021-01-04 12:46 ` [EXTERNAL] " Halil Pasic
2021-01-04 12:46 ` Halil Pasic
2021-01-04 18:40 ` Ram Pai
2021-01-04 18:40 ` Ram Pai
2021-01-05 10:56 ` [EXTERNAL] " Halil Pasic
2021-01-05 10:56 ` Halil Pasic
2021-01-05 20:41 ` Ram Pai
2021-01-05 20:41 ` Ram Pai
2021-01-11 16:59 ` Cornelia Huck
2021-01-11 16:59 ` Cornelia Huck
2021-01-11 19:58 ` Ram Pai
2021-01-11 19:58 ` Ram Pai
2021-01-12 8:19 ` Cornelia Huck
2021-01-12 8:19 ` Cornelia Huck
2021-01-12 18:55 ` Ram Pai
2021-01-12 18:55 ` Ram Pai
2021-01-13 8:06 ` Cornelia Huck
2021-01-13 8:06 ` Cornelia Huck
2021-01-15 18:55 ` Ram Pai
2021-01-15 18:55 ` Ram Pai
2021-01-19 8:19 ` Cornelia Huck
2021-01-19 8:19 ` Cornelia Huck
2021-01-19 9:59 ` Daniel P. Berrangé [this message]
2021-01-19 9:59 ` Daniel P. Berrangé
2021-01-14 11:23 ` Daniel P. Berrangé
2021-01-14 11:23 ` Daniel P. Berrangé
2021-01-13 12:42 ` Dr. David Alan Gilbert
2021-01-13 12:42 ` Dr. David Alan Gilbert
2021-01-14 10:28 ` Christian Borntraeger
2021-01-14 10:28 ` Christian Borntraeger
2021-01-14 10:36 ` Dr. David Alan Gilbert
2021-01-14 10:36 ` Dr. David Alan Gilbert
2021-01-14 10:52 ` Christian Borntraeger
2021-01-14 10:52 ` Christian Borntraeger
2021-01-14 11:05 ` Cornelia Huck
2021-01-14 11:05 ` Cornelia Huck
2021-01-14 11:45 ` Dr. David Alan Gilbert
2021-01-14 11:45 ` Dr. David Alan Gilbert
2021-01-14 11:50 ` Christian Borntraeger
2021-01-14 11:50 ` Christian Borntraeger
2021-01-14 12:20 ` Daniel P. Berrangé
2021-01-14 12:20 ` Daniel P. Berrangé
2021-01-14 14:04 ` Cornelia Huck
2021-01-14 14:04 ` Cornelia Huck
2021-01-14 14:09 ` Christian Borntraeger
2021-01-14 14:09 ` Christian Borntraeger
2021-01-14 14:15 ` Daniel P. Berrangé
2021-01-14 14:15 ` Daniel P. Berrangé
2021-01-14 15:25 ` Christian Borntraeger
2021-01-14 15:25 ` Christian Borntraeger
2021-01-14 15:33 ` Daniel P. Berrangé
2021-01-14 15:33 ` Daniel P. Berrangé
2021-01-15 18:24 ` Ram Pai
2021-01-15 18:24 ` Ram Pai
2021-01-14 11:25 ` Daniel P. Berrangé
2021-01-14 11:25 ` Daniel P. Berrangé
2021-01-14 23:51 ` David Gibson
2021-01-14 23:51 ` David Gibson
2021-01-18 17:39 ` Dr. David Alan Gilbert
2021-01-18 17:39 ` Dr. David Alan Gilbert
2021-01-19 8:28 ` Christian Borntraeger
2021-01-19 8:28 ` Christian Borntraeger
2021-01-19 8:34 ` Cornelia Huck
2021-01-19 8:34 ` Cornelia Huck
2020-12-04 5:44 ` [for-6.0 v5 12/13] securable guest memory: Alter virtio default properties for protected guests David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-04 8:10 ` Christian Borntraeger
2020-12-04 8:10 ` Christian Borntraeger
2020-12-04 8:17 ` Cornelia Huck
2020-12-04 8:17 ` Cornelia Huck
2020-12-04 8:29 ` Christian Borntraeger
2020-12-04 8:29 ` Christian Borntraeger
2020-12-04 14:43 ` Halil Pasic
2020-12-04 14:43 ` Halil Pasic
2020-12-08 1:54 ` David Gibson
2020-12-08 1:54 ` David Gibson
2020-12-08 8:16 ` Christian Borntraeger
2020-12-08 8:16 ` Christian Borntraeger
2020-12-08 10:28 ` Halil Pasic
2020-12-08 10:28 ` Halil Pasic
2020-12-08 12:50 ` Cornelia Huck
2020-12-08 12:50 ` Cornelia Huck
2020-12-17 5:53 ` David Gibson
2020-12-17 5:53 ` David Gibson
2020-12-04 17:04 ` Cornelia Huck
2020-12-04 17:04 ` Cornelia Huck
2020-12-04 5:44 ` [for-6.0 v5 13/13] s390: Recognize securable-guest-memory option David Gibson
2020-12-04 5:44 ` David Gibson
2020-12-15 11:45 ` Cornelia Huck
2020-12-15 11:45 ` Cornelia Huck
2020-12-17 5:54 ` David Gibson
2020-12-17 5:54 ` David Gibson
2020-12-04 8:06 ` [for-6.0 v5 00/13] Generalize memory encryption models Christian Borntraeger
2020-12-04 8:06 ` Christian Borntraeger
2020-12-04 13:02 ` Cornelia Huck
2020-12-04 13:02 ` Cornelia Huck
2020-12-04 13:07 ` Dr. David Alan Gilbert
2020-12-04 13:07 ` Dr. David Alan Gilbert
2020-12-04 13:12 ` Cornelia Huck
2020-12-04 13:12 ` Cornelia Huck
2020-12-08 2:57 ` David Gibson
2020-12-08 2:57 ` David Gibson
2020-12-08 12:43 ` Cornelia Huck
2020-12-08 12:43 ` Cornelia Huck
2020-12-17 6:21 ` David Gibson
2020-12-17 6:21 ` David Gibson
2020-12-17 11:43 ` Cornelia Huck
2020-12-17 11:43 ` Cornelia Huck
2020-12-04 13:25 ` Daniel P. Berrangé
2020-12-04 13:25 ` Daniel P. Berrangé
2020-12-04 13:51 ` Halil Pasic
2020-12-04 13:51 ` Halil Pasic
2020-12-08 2:54 ` David Gibson
2020-12-08 2:54 ` David Gibson
2020-12-04 9:50 ` Daniel P. Berrangé
2020-12-04 9:50 ` Daniel P. Berrangé
2021-01-12 3:02 ` David Gibson
2021-01-12 3:02 ` David Gibson
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