From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: About "(XEN) Interrupt remapping disablde" log Date: Fri, 1 Nov 2013 14:53:07 +0000 Message-ID: <5273C053.4030709@citrix.com> References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2872167778137834304==" Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: =?UTF-8?B?5oiQ5Lya5piO?= Cc: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org --===============2872167778137834304== Content-Type: multipart/alternative; boundary="------------040909050201040808090203" --------------040909050201040808090203 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit On 01/11/13 14:49, 成会明 wrote: > hi, > > > If Xen dump "(XEN) Interrupt remapping disalbed", can I stll pass > through video adapter to domain U ? > > 1. I think interrupt remapping is must for passthrough pci > device which can generate interrupt. right? > > Interrupt remapping is not required for PCIPassthrough to function. Simple DMA remapping is sufficient. Interrupt remapping is required for security reasons. If you are also the administrator of your domU and trust your domU graphics driver not to maliciously attack Xen, then it is ok to not use interrupt remapping. ~Andrew > > thanks > huiming > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel --------------040909050201040808090203 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: 8bit

On 01/11/13 14:49, 成会明 wrote:

hi,

If Xen dump "(XEN) Interrupt remapping disalbed", can I stll pass through video adapter to domain U ?

1. I think interrupt remapping is must for passthrough pci device which can generate interrupt. right?

Interrupt remapping is not required for PCIPassthrough to function. Simple DMA remapping is sufficient.

Interrupt remapping is required for security reasons. If you are also the administrator of your domU and trust your domU graphics driver not to maliciously attack Xen, then it is ok to not use interrupt remapping.

~Andrew

thanks

huiming

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