From: malc <av1474@comtv.ru>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Blue Swirl <blauwirbel@gmail.com>,
"Liu >> \"Liu, Jinsong\"" <jinsong.liu@intel.com>,
Paul Brook <paul@codesourcery.com>, Avi Kivity <avi@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH v2 0/7] APIC/IOAPIC cleanup
Date: Fri, 20 Aug 2010 02:52:47 +0400 (MSD) [thread overview]
Message-ID: <alpine.LNX.2.00.1008200251570.1410@linmac> (raw)
In-Reply-To: <4C6DA75D.40303@codemonkey.ws>
On Thu, 19 Aug 2010, Anthony Liguori wrote:
> On 08/19/2010 04:21 PM, Blue Swirl wrote:
> > > Should CPUs appear in the QEMU device tree?
> > >
> > They have several properties that should be user visible.
> >
>
> Sure, but that's an argument for having some of the qdev features (like
> variant properties) be consumable outside of qdev.
>
[..snip..]
>
> Yes, but the programming model was different.
>
> Look at the PIC compared to the lapic. The PIC is programmed via pio at a
> fixed location. There is only one PIC and it interacts with the system just
> like all other devices. IOW, there is no reference to CPUState.
There are two PICs actually there's a cascade..
>
> When you look at the local APIC (apic.c) however, you see that it's the only
> device in the tree that actually interacts with a CPUState. The notion of
> cpu_get_current_apic() is a good example of the tricks needed to make this
> work.
>
> The local APIC is a cpu feature, not a device.
>
> Regards,
>
> Anthony Liguori
>
--
mailto:av1474@comtv.ru
next prev parent reply other threads:[~2010-08-19 22:53 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-12 21:14 [Qemu-devel] [PATCH v2 0/7] APIC/IOAPIC cleanup Blue Swirl
2010-06-13 16:56 ` [Qemu-devel] " Jan Kiszka
2010-06-13 17:03 ` Andreas Färber
2010-06-13 17:53 ` Blue Swirl
2010-06-13 18:17 ` Andreas Färber
2010-06-13 17:49 ` Blue Swirl
2010-08-19 19:33 ` [Qemu-devel] " Anthony Liguori
2010-08-19 20:09 ` Blue Swirl
2010-08-19 20:49 ` Anthony Liguori
2010-08-19 21:21 ` Blue Swirl
2010-08-19 21:51 ` Anthony Liguori
2010-08-19 22:52 ` malc [this message]
2010-08-20 1:01 ` Anthony Liguori
2010-08-20 10:00 ` malc
2010-08-20 8:42 ` [Qemu-devel] " Paolo Bonzini
2010-08-20 17:01 ` [Qemu-devel] " Markus Armbruster
2010-08-20 18:38 ` Anthony Liguori
2010-08-22 20:28 ` Avi Kivity
2010-08-22 21:02 ` Anthony Liguori
2010-08-23 5:46 ` Avi Kivity
2010-08-23 13:23 ` Anthony Liguori
2010-08-23 13:42 ` Avi Kivity
2010-08-23 13:48 ` Anthony Liguori
2010-08-23 14:00 ` Avi Kivity
2010-08-23 14:26 ` Anthony Liguori
2010-08-23 14:32 ` Avi Kivity
2010-08-23 14:47 ` Anthony Liguori
2010-08-23 15:10 ` Markus Armbruster
2010-08-23 16:05 ` Anthony Liguori
2010-08-23 17:36 ` Markus Armbruster
2010-08-23 17:47 ` Anthony Liguori
2010-08-23 18:24 ` [Qemu-devel] " Jan Kiszka
2010-08-23 18:29 ` Anthony Liguori
2010-08-23 15:14 ` [Qemu-devel] " Avi Kivity
2010-08-23 16:02 ` Anthony Liguori
2010-08-24 9:51 ` Avi Kivity
2010-08-20 19:26 ` Blue Swirl
2010-08-20 10:35 ` [Qemu-devel] " Jan Kiszka
2010-08-22 9:37 ` [Qemu-devel] " Avi Kivity
2010-08-22 18:52 ` Anthony Liguori
2010-08-22 19:44 ` Avi Kivity
2010-08-22 20:03 ` Anthony Liguori
2010-08-22 20:33 ` Avi Kivity
2010-08-22 21:06 ` Anthony Liguori
2010-08-23 5:49 ` Avi Kivity
2010-08-23 9:09 ` [Qemu-devel] " Jan Kiszka
2010-08-23 9:25 ` Avi Kivity
2010-08-23 10:11 ` Alexander Graf
2010-08-23 10:15 ` Avi Kivity
2010-08-23 10:18 ` Alexander Graf
2010-08-23 10:25 ` Avi Kivity
2010-08-22 21:07 ` [Qemu-devel] " Anthony Liguori
2010-08-23 5:48 ` Avi Kivity
2010-08-22 9:13 ` Avi Kivity
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