From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: [PATCH v02 1/7] arm: introduce remoteprocessor iommu module Date: Wed, 16 Jul 2014 16:34:27 +0100 Message-ID: <1405524867.1087.31.camel@kazak.uk.xensource.com> References: <1403780826-22123-1-git-send-email-andrii.tseglytskyi@globallogic.com> <1403780826-22123-2-git-send-email-andrii.tseglytskyi@globallogic.com> <1405524545.1087.27.camel@kazak.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1405524545.1087.27.camel@kazak.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: Andrii Tseglytskyi Cc: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Wed, 2014-07-16 at 16:29 +0100, Ian Campbell wrote: > WRT the shadowing, I don't see the bit which causes the guest pages > which it is using as PT page for the remoteproc to get marked R/O to > force a trap. Perhaps that comes later. > > Do these remoteproc page tables get frequently updated at run time or > are they mostly just build once and forget? Reading the next patch I'm concluding that the translation happens each time you write to the MMU's base pointer. IOW every update requires you to rewrite that pointer, is that right? Ian.