From: Gleb Natapov <gleb@redhat.com>
To: Scott Wood <scottwood@freescale.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Alexander Graf <agraf@suse.de>,
kvm-ppc@vger.kernel.org, kvm@vger.kernel.org,
Christoffer Dall <cdall@cs.columbia.edu>
Subject: Re: [RFC PATCH 1/6] kvm: add device control API
Date: Thu, 21 Feb 2013 06:39:09 +0000 [thread overview]
Message-ID: <20130221063909.GW3600@redhat.com> (raw)
In-Reply-To: <1361410132.31212.16@snotra>
On Wed, Feb 20, 2013 at 07:28:52PM -0600, Scott Wood wrote:
> On 02/20/2013 06:14:37 PM, Marcelo Tosatti wrote:
> >On Wed, Feb 20, 2013 at 05:53:20PM -0600, Scott Wood wrote:
> >> >It is then not necessary to set device attributes on a live
> >guest and
> >> >deal with the complications associated with that.
> >>
> >> Which complications?
> >>
> >> -Scott
> >
> >Semantics of individual attribute writes, for one.
>
> When the attribute is a device register, the hardware documentation
> takes care of that. Otherwise, the semantics are documented in the
> device-specific documentation -- which can include restricting when
> the access is allowed. Same as with any other interface
> documentation.
>
> I suppose mpic.txt could use an additional statement that
> KVM_DEV_MPIC_GRP_REGISTER performs an access as if it were performed
> by the guest.
>
If access to an attribute has a guest visible side effect you cannot
use this interface for migration. This is exactly the point in favor
of distinguish accesses that have side effects (COMMAND or whatever)
and accesses that set/get attribute (SET|GET_ATTR).
--
Gleb.
next prev parent reply other threads:[~2013-02-21 6:39 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-14 5:49 [RFC PATCH 0/6] kvm/ppc/mpic: in-kernel irqchip Scott Wood
2013-02-14 5:49 ` [RFC PATCH 1/6] kvm: add device control API Scott Wood
2013-02-18 12:21 ` Gleb Natapov
2013-02-18 23:01 ` Scott Wood
2013-02-19 0:43 ` Christoffer Dall
2013-02-19 12:24 ` Gleb Natapov
2013-02-19 15:51 ` Christoffer Dall
2013-02-19 21:16 ` Scott Wood
2013-02-20 13:09 ` Gleb Natapov
2013-02-20 21:28 ` Marcelo Tosatti
2013-02-20 22:44 ` Marcelo Tosatti
2013-02-20 23:53 ` Scott Wood
2013-02-21 0:14 ` Marcelo Tosatti
2013-02-21 1:28 ` Scott Wood
2013-02-21 6:39 ` Gleb Natapov [this message]
2013-02-21 23:03 ` Marcelo Tosatti
2013-02-22 2:00 ` Scott Wood
2013-02-23 15:04 ` Marcelo Tosatti
2013-02-26 0:27 ` Scott Wood
2013-02-21 2:05 ` Scott Wood
2013-02-21 8:22 ` Gleb Natapov
2013-02-22 2:17 ` Scott Wood
2013-02-24 15:46 ` Gleb Natapov
2013-02-25 15:23 ` Alexander Graf
2013-02-26 2:38 ` Scott Wood
2013-02-20 21:17 ` Marcelo Tosatti
2013-02-20 23:20 ` Scott Wood
2013-02-21 0:01 ` Marcelo Tosatti
2013-02-21 0:33 ` Scott Wood
2013-02-25 1:11 ` Paul Mackerras
2013-02-25 13:09 ` Gleb Natapov
2013-02-25 15:29 ` Alexander Graf
2013-02-19 0:44 ` Christoffer Dall
2013-02-19 0:53 ` Scott Wood
2013-02-19 5:50 ` Christoffer Dall
2013-02-19 12:45 ` Gleb Natapov
2013-02-19 20:16 ` Scott Wood
2013-02-20 2:16 ` Christoffer Dall
2013-02-24 13:12 ` Marc Zyngier
2013-03-06 0:59 ` Paul Mackerras
2013-03-06 1:20 ` Scott Wood
2013-03-06 2:48 ` Benjamin Herrenschmidt
2013-03-06 3:36 ` Scott Wood
2013-03-06 4:28 ` Benjamin Herrenschmidt
2013-03-06 10:18 ` Gleb Natapov
2013-02-14 5:49 ` [RFC PATCH 2/6] kvm/ppc: add a notifier chain for vcpu creation/destruction Scott Wood
2013-02-14 5:49 ` [RFC PATCH 3/6] kvm/ppc/mpic: import hw/openpic.c from QEMU Scott Wood
2013-02-14 5:49 ` [RFC PATCH 4/6] kvm/ppc/mpic: remove some obviously unneeded code Scott Wood
2013-02-14 5:49 ` [RFC PATCH 5/6] kvm/ppc/mpic: adapt to kernel style and environment Scott Wood
2013-02-14 5:49 ` [RFC PATCH 6/6] kvm/ppc/mpic: in-kernel MPIC emulation Scott Wood
2013-03-21 8:28 ` Alexander Graf
2013-03-21 14:43 ` Scott Wood
2013-03-21 14:52 ` Alexander Graf
2013-02-18 12:04 ` [RFC PATCH 0/6] kvm/ppc/mpic: in-kernel irqchip Gleb Natapov
2013-02-18 23:05 ` Scott Wood
2013-04-01 22:47 ` [RFC PATCH v2 0/6] device control and in-kernel MPIC Scott Wood
2013-04-01 22:47 ` [RFC PATCH v2 1/6] kvm: add device control API Scott Wood
2013-04-02 6:59 ` tiejun.chen
[not found] ` <1364923807.24520.2@snotra>
2013-04-03 1:28 ` tiejun.chen
[not found] ` <1364952853.8690.3@snotra>
2013-04-03 1:42 ` tiejun.chen
2013-04-03 1:02 ` Paul Mackerras
2013-04-03 1:19 ` Scott Wood
2013-04-03 2:17 ` Paul Mackerras
2013-04-03 13:22 ` Alexander Graf
2013-04-03 17:37 ` Scott Wood
2013-04-03 17:39 ` Alexander Graf
2013-04-04 9:58 ` Gleb Natapov
2013-04-03 21:03 ` Scott Wood
2013-04-01 22:47 ` [RFC PATCH v2 2/6] kvm/ppc/mpic: import hw/openpic.c from QEMU Scott Wood
2013-04-01 22:47 ` [RFC PATCH v2 3/6] kvm/ppc/mpic: remove some obviously unneeded code Scott Wood
2013-04-01 22:47 ` [RFC PATCH v2 4/6] kvm/ppc/mpic: adapt to kernel style and environment Scott Wood
2013-04-01 22:47 ` [RFC PATCH v2 5/6] kvm/ppc/mpic: in-kernel MPIC emulation Scott Wood
2013-04-01 22:47 ` [RFC PATCH v2 6/6] kvm/ppc/mpic: add KVM_CAP_IRQ_MPIC Scott Wood
2013-04-03 1:57 ` [RFC PATCH v3 0/6] device control and in-kernel MPIC Scott Wood
2013-04-03 1:57 ` [RFC PATCH v3 1/6] kvm: add device control API Scott Wood
2013-04-03 15:13 ` Alexander Graf
2013-04-04 10:41 ` Gleb Natapov
2013-04-04 23:47 ` Scott Wood
2013-04-08 10:34 ` Gleb Natapov
2013-04-05 1:02 ` Paul Mackerras
2013-04-08 10:37 ` Gleb Natapov
2013-04-08 5:33 ` Paul Mackerras
2013-04-09 0:50 ` Scott Wood
2013-04-03 1:57 ` [RFC PATCH v3 2/6] kvm/ppc/mpic: import hw/openpic.c from QEMU Scott Wood
2013-04-03 1:57 ` [RFC PATCH v3 3/6] kvm/ppc/mpic: remove some obviously unneeded code Scott Wood
2013-04-03 1:57 ` [RFC PATCH v3 4/6] kvm/ppc/mpic: adapt to kernel style and environment Scott Wood
2013-04-03 1:57 ` [RFC PATCH v3 5/6] kvm/ppc/mpic: in-kernel MPIC emulation Scott Wood
2013-04-03 15:55 ` Gleb Natapov
2013-04-03 20:58 ` Scott Wood
2013-04-04 5:59 ` Gleb Natapov
2013-04-04 23:33 ` Scott Wood
2013-04-08 10:39 ` Gleb Natapov
2013-04-03 16:19 ` Alexander Graf
2013-04-03 21:38 ` Scott Wood
2013-04-03 21:58 ` Alexander Graf
2013-04-03 22:07 ` Scott Wood
2013-04-03 22:12 ` Alexander Graf
2013-04-03 22:54 ` Scott Wood
2013-04-04 9:42 ` Alexander Graf
2013-04-03 23:23 ` Scott Wood
2013-04-08 6:30 ` Paul Mackerras
2013-04-09 0:49 ` Scott Wood
2013-04-03 1:57 ` [RFC PATCH v3 6/6] kvm/ppc/mpic: add KVM_CAP_IRQ_MPIC Scott Wood
2013-04-04 12:54 ` Alexander Graf
2013-04-04 18:41 ` Scott Wood
2013-04-04 22:30 ` Alexander Graf
2013-04-04 22:35 ` Scott Wood
2013-04-05 6:09 ` Alexander Graf
2013-04-05 17:11 ` Scott Wood
2013-04-13 0:08 ` [PATCH v4 0/6] device-control and in-kernel MPIC Scott Wood
2013-04-13 0:08 ` [PATCH v4 1/6] kvm: add device control API Scott Wood
2013-04-25 9:43 ` Gleb Natapov
2013-04-25 10:47 ` Alexander Graf
2013-04-25 12:07 ` Gleb Natapov
2013-04-25 13:45 ` Alexander Graf
2013-04-25 13:51 ` Gleb Natapov
2013-04-25 16:51 ` Scott Wood
2013-04-25 18:22 ` Gleb Natapov
2013-04-25 18:59 ` Scott Wood
2013-04-26 9:53 ` Gleb Natapov
2013-04-26 9:55 ` Alexander Graf
2013-04-26 9:57 ` Gleb Natapov
2013-04-13 0:08 ` [PATCH v4 2/6] kvm/ppc/mpic: import hw/openpic.c from QEMU Scott Wood
2013-04-13 0:08 ` [PATCH v4 3/6] kvm/ppc/mpic: remove some obviously unneeded code Scott Wood
2013-04-13 0:08 ` [PATCH v4 4/6] kvm/ppc/mpic: adapt to kernel style and environment Scott Wood
2013-04-13 0:08 ` [PATCH v4 5/6] kvm/ppc/mpic: in-kernel MPIC emulation Scott Wood
2013-04-13 0:08 ` [PATCH v4 6/6] kvm/ppc/mpic: add KVM_CAP_IRQ_MPIC Scott Wood
2013-04-15 5:23 ` Paul Mackerras
2013-04-15 17:52 ` Scott Wood
2013-04-16 3:59 ` Paul Mackerras
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