From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v3 05/13] xen/iommu: arm: Remove temporary the SMMU driver Date: Fri, 20 Feb 2015 12:53:18 +0000 Message-ID: <54E72E3E.5040703@linaro.org> References: <1422643768-23614-1-git-send-email-julien.grall@linaro.org> <1422643768-23614-6-git-send-email-julien.grall@linaro.org> <1424434719.30924.198.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1YOn7E-0005Yx-7I for xen-devel@lists.xenproject.org; Fri, 20 Feb 2015 12:55:32 +0000 Received: by mail-wg0-f48.google.com with SMTP id l18so12950809wgh.7 for ; Fri, 20 Feb 2015 04:53:45 -0800 (PST) In-Reply-To: <1424434719.30924.198.camel@citrix.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: xen-devel@lists.xenproject.org, tim@xen.org, stefano.stabellini@citrix.com List-Id: xen-devel@lists.xenproject.org Hi Ian, On 20/02/15 12:18, Ian Campbell wrote: > On Fri, 2015-01-30 at 18:49 +0000, Julien Grall wrote: >> The current SMMU driver has completly diverged. That makes me hard to >> maintain. > > Will this temporarily regress anything in a noticeable way? I think > it'll just potentially make some hypothetical platform switch back to > 1:1 dom0 mode, which in practice they all use anyway, IOW no harm done, > even temporarily. So: We still have to keep the 1:1 DOM0 mapping with SMMU. It's because we don't know if all devices are protected. The only possible regression is the SMMU node won't be remove from DOM0 and threfore may be used by Linux. Aside that there is no different for the user. >> Signed-off-by: Julien Grall >> Acked-by: Stefano Stabellini > > Acked-by: Ian Campbell Regards, -- Julien Grall