From: Gianluca Guida <glguida@tlbflush.org>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Jan Beulich <JBeulich@suse.com>, xen-devel <xen-devel@lists.xen.org>
Subject: Re: Xen 4.2 new features and status -- please help me make a list
Date: Sat, 8 Sep 2012 14:26:28 +0200 [thread overview]
Message-ID: <20120908122628.GA545@cr3> (raw)
In-Reply-To: <1347033075.30018.128.camel@zakaz.uk.xensource.com>
On Fri, Sep 07, 2012 at 04:51:15PM +0100, Ian Campbell wrote:
> On Fri, 2012-09-07 at 16:49 +0100, Jan Beulich wrote:
> > >>> On 07.09.12 at 17:39, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> > >> > vMSI: ? Emulated (or real?) MSIs for guests?
> > >> > State? New in 4.2?
> > >>
> > >> Not sure what you're referring to here. There certainly was a
> > >> xen/arch/x86/hvm/vmsi.c in 4.1 already.
> > >
> > > OK, thanks. 4.0 too by the looks of it.
> > >
> > > What exactly is this? Is it about injection of MSIs from real
> > > (passthrough) hardware devices to guests (only HVM ones?) or is about
> > > MSIs generated by emulated devices (or both)?
> >
> > I don't think emulated devices genera MSIs, so to me this is
> > just for passthrough. But I may be wrong.
>
> It sounds plausible to me ;-)
There is in 4.2 an HVM op to generate MSIs from emulated devices, added
at changeset 23413.
The passthrough part was already present before.
Thanks,
Gianluca
next prev parent reply other threads:[~2012-09-08 12:26 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 14:14 Xen 4.2 new features and status -- please help me make a list Ian Campbell
2012-09-07 14:26 ` Christoph Egger
2012-09-07 15:43 ` Ian Campbell
2012-09-07 14:34 ` Andres Lagar-Cavilla
2012-09-07 15:47 ` Ian Campbell
2012-09-07 15:59 ` Olaf Hering
2012-09-07 15:22 ` Jan Beulich
2012-09-07 15:39 ` Ian Campbell
2012-09-07 15:49 ` Jan Beulich
2012-09-07 15:51 ` Ian Campbell
2012-09-08 12:26 ` Gianluca Guida [this message]
2012-09-09 6:33 ` Deep Debroy
2012-09-07 15:35 ` Tim Deegan
2012-09-07 15:36 ` Jan Beulich
2012-09-07 15:43 ` Ian Campbell
2012-09-07 15:57 ` Jan Beulich
2012-09-07 15:57 ` Ian Campbell
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