From: Gleb Natapov <gleb@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
Stuart Yoder <stuart.yoder@freescale.com>,
Scott Wood <scottwood@freescale.com>,
Paul Mackerras <paulus@samba.org>,
Peter Maydell <peter.maydell@linaro.org>
Subject: Re: in-kernel interrupt controller steering
Date: Wed, 06 Mar 2013 13:16:14 +0000 [thread overview]
Message-ID: <20130306131614.GS11223@redhat.com> (raw)
In-Reply-To: <20563F35-046C-432C-9F7A-0CEF38180964@suse.de>
On Wed, Mar 06, 2013 at 12:58:39PM +0100, Alexander Graf wrote:
>
> On 06.03.2013, at 12:57, Paolo Bonzini wrote:
>
> >>> I agree. But is the device really being created at CREATE_DEVICE
> >>> time? What happens if you create N CPUs and N-1 irqchips?
> >>
> >> irqchip in CREATE_DEVICE is the IOAPIC, not the LAPIC. The LAPIC gets
> >> spawned at vcpu creation.
> >>
> >>> On x86, the LAPIC is created magically together with the VCPU.
> >>
> >> Yes, and so far I haven't seen any proposal to change this even in
> >> the CREATE_DEVICE world.
> >
> > But don't you need anyway an id to get/set the device properties of
> > the per-VCPU irqchip? If you were adding the x86 irqchip with the
> > new API, what would be the replacement of KVM_GET_LAPIC/KVM_SET_LAPIC?
>
> In the current model, that would be ONE_REG registers on the vcpus.
>
Yes, the same way as KVM_GET_LAPIC is per cpu ioctl. No need for special
ID.
--
Gleb.
WARNING: multiple messages have this Message-ID (diff)
From: Gleb Natapov <gleb@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
Stuart Yoder <stuart.yoder@freescale.com>,
Scott Wood <scottwood@freescale.com>,
Paul Mackerras <paulus@samba.org>,
Peter Maydell <peter.maydell@linaro.org>
Subject: Re: in-kernel interrupt controller steering
Date: Wed, 6 Mar 2013 15:16:14 +0200 [thread overview]
Message-ID: <20130306131614.GS11223@redhat.com> (raw)
In-Reply-To: <20563F35-046C-432C-9F7A-0CEF38180964@suse.de>
On Wed, Mar 06, 2013 at 12:58:39PM +0100, Alexander Graf wrote:
>
> On 06.03.2013, at 12:57, Paolo Bonzini wrote:
>
> >>> I agree. But is the device really being created at CREATE_DEVICE
> >>> time? What happens if you create N CPUs and N-1 irqchips?
> >>
> >> irqchip in CREATE_DEVICE is the IOAPIC, not the LAPIC. The LAPIC gets
> >> spawned at vcpu creation.
> >>
> >>> On x86, the LAPIC is created magically together with the VCPU.
> >>
> >> Yes, and so far I haven't seen any proposal to change this even in
> >> the CREATE_DEVICE world.
> >
> > But don't you need anyway an id to get/set the device properties of
> > the per-VCPU irqchip? If you were adding the x86 irqchip with the
> > new API, what would be the replacement of KVM_GET_LAPIC/KVM_SET_LAPIC?
>
> In the current model, that would be ONE_REG registers on the vcpus.
>
Yes, the same way as KVM_GET_LAPIC is per cpu ioctl. No need for special
ID.
--
Gleb.
next prev parent reply other threads:[~2013-03-06 13:16 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-04 22:20 in-kernel interrupt controller steering Alexander Graf
2013-03-04 22:20 ` Alexander Graf
2013-03-05 0:59 ` Scott Wood
2013-03-05 0:59 ` Scott Wood
2013-03-05 5:44 ` Paul Mackerras
2013-03-05 5:44 ` Paul Mackerras
2013-03-05 15:25 ` Gleb Natapov
2013-03-05 15:25 ` Gleb Natapov
2013-03-06 9:40 ` Paolo Bonzini
2013-03-06 9:40 ` Paolo Bonzini
2013-03-06 9:58 ` Gleb Natapov
2013-03-06 9:58 ` Gleb Natapov
2013-03-06 10:04 ` Alexander Graf
2013-03-06 10:04 ` Alexander Graf
2013-03-06 10:12 ` Gleb Natapov
2013-03-06 10:12 ` Gleb Natapov
2013-03-06 10:38 ` Paolo Bonzini
2013-03-06 10:38 ` Paolo Bonzini
2013-03-06 10:38 ` Paolo Bonzini
2013-03-06 10:38 ` Paolo Bonzini
2013-03-06 11:26 ` Gleb Natapov
2013-03-06 11:26 ` Gleb Natapov
2013-03-06 11:44 ` Paolo Bonzini
2013-03-06 11:44 ` Paolo Bonzini
2013-03-06 11:46 ` Alexander Graf
2013-03-06 11:46 ` Alexander Graf
2013-03-06 11:59 ` Gleb Natapov
2013-03-06 11:59 ` Gleb Natapov
2013-03-06 12:02 ` Alexander Graf
2013-03-06 12:02 ` Alexander Graf
2013-03-06 12:14 ` Paolo Bonzini
2013-03-06 12:14 ` Paolo Bonzini
2013-03-06 12:20 ` Alexander Graf
2013-03-06 12:20 ` Alexander Graf
2013-03-06 12:28 ` Paolo Bonzini
2013-03-06 12:28 ` Paolo Bonzini
2013-03-06 13:14 ` Gleb Natapov
2013-03-06 13:14 ` Gleb Natapov
2013-03-06 13:22 ` Alexander Graf
2013-03-06 13:22 ` Alexander Graf
2013-03-06 13:56 ` Gleb Natapov
2013-03-06 13:56 ` Gleb Natapov
2013-03-06 14:03 ` Alexander Graf
2013-03-06 14:03 ` Alexander Graf
2013-03-06 14:12 ` Paolo Bonzini
2013-03-06 14:12 ` Paolo Bonzini
2013-03-06 14:30 ` Alexander Graf
2013-03-06 14:30 ` Alexander Graf
2013-03-06 14:37 ` Paolo Bonzini
2013-03-06 14:37 ` Paolo Bonzini
2013-03-06 14:40 ` Alexander Graf
2013-03-06 14:40 ` Alexander Graf
2013-03-06 14:41 ` Gleb Natapov
2013-03-06 14:41 ` Gleb Natapov
2013-03-06 14:48 ` Alexander Graf
2013-03-06 14:48 ` Alexander Graf
2013-03-06 14:59 ` Alexander Graf
2013-03-06 14:59 ` Alexander Graf
2013-03-06 15:02 ` Paolo Bonzini
2013-03-06 15:02 ` Paolo Bonzini
2013-03-06 15:30 ` Gleb Natapov
2013-03-06 15:30 ` Gleb Natapov
2013-03-06 16:33 ` Alexander Graf
2013-03-06 16:33 ` Alexander Graf
2013-03-07 0:32 ` Paul Mackerras
2013-03-07 0:32 ` Paul Mackerras
2013-03-07 7:43 ` Paolo Bonzini
2013-03-07 7:43 ` Paolo Bonzini
2013-03-06 13:41 ` Paolo Bonzini
2013-03-06 13:41 ` Paolo Bonzini
2013-03-06 14:11 ` Gleb Natapov
2013-03-06 14:11 ` Gleb Natapov
2013-03-06 14:31 ` Alexander Graf
2013-03-06 14:31 ` Alexander Graf
2013-03-06 18:46 ` Peter Maydell
2013-03-06 18:46 ` Peter Maydell
2013-03-06 19:20 ` Alexander Graf
2013-03-06 19:20 ` Alexander Graf
2013-03-06 11:44 ` Alexander Graf
2013-03-06 11:44 ` Alexander Graf
2013-03-06 11:46 ` Paolo Bonzini
2013-03-06 11:46 ` Paolo Bonzini
2013-03-06 11:47 ` Alexander Graf
2013-03-06 11:47 ` Alexander Graf
2013-03-06 11:57 ` Paolo Bonzini
2013-03-06 11:57 ` Paolo Bonzini
2013-03-06 11:58 ` Alexander Graf
2013-03-06 11:58 ` Alexander Graf
2013-03-06 13:16 ` Gleb Natapov [this message]
2013-03-06 13:16 ` Gleb Natapov
2013-03-06 0:23 ` Benjamin Herrenschmidt
2013-03-06 0:23 ` Benjamin Herrenschmidt
2013-03-06 0:33 ` Alexander Graf
2013-03-06 0:33 ` Alexander Graf
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=20130306131614.GS11223@redhat.com \
--to=gleb@redhat.com \
--cc=agraf@suse.de \
--cc=kvm-ppc@vger.kernel.org \
--cc=kvm@vger.kernel.org \
--cc=paulus@samba.org \
--cc=pbonzini@redhat.com \
--cc=peter.maydell@linaro.org \
--cc=scottwood@freescale.com \
--cc=stuart.yoder@freescale.com \
/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.