From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gianluca Guida Subject: Re: Xen 4.2 new features and status -- please help me make a list Date: Sat, 8 Sep 2012 14:26:28 +0200 Message-ID: <20120908122628.GA545@cr3> References: <1347027296.30018.108.camel@zakaz.uk.xensource.com> <504A2D710200007800099E11@nat28.tlf.novell.com> <1347032363.30018.120.camel@zakaz.uk.xensource.com> <504A33930200007800099E5A@nat28.tlf.novell.com> <1347033075.30018.128.camel@zakaz.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1347033075.30018.128.camel@zakaz.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Ian Campbell Cc: Jan Beulich , xen-devel List-Id: xen-devel@lists.xenproject.org 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 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