From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Dunlap Subject: Re: [PATCH v2] xen: arm: Enable 1:1 workaround by default Date: Wed, 4 Dec 2013 17:22:17 +0000 Message-ID: <529F64C9.9060808@eu.citrix.com> References: <1386168861-30213-1-git-send-email-ian.campbell@citrix.com> <1386177327.17466.106.camel@kazak.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1386177327.17466.106.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: Ian Campbell , xen-devel@lists.xen.org Cc: julien.grall@linaro.org, tim@xen.org, stefano.stabellini@eu.citrix.com List-Id: xen-devel@lists.xenproject.org On 12/04/2013 05:15 PM, Ian Campbell wrote: > I forgot to CC George and make a release exception case. > > Basically it is impossible to have a system which doesn't use the 1:1 > map with 4.4 due to the lack of an iommu driver. Given this it is silly > to require every platform to enable this "quirk" and it's not > necessarily something which someone would think to enable when adding a > new platform, so it's just an unnecessary bear trap. (The down side of > not enabling 1:1 is weird I/O errors from dom0) > > The patch is simple and low risk. Sounds reasonable: Release-acked-by: George Dunlap