From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH] xen: arm: Enable 1:1 workaround by default Date: Wed, 27 Nov 2013 12:24:55 +0000 Message-ID: <5295E497.2030901@citrix.com> References: <1385554746-21990-1-git-send-email-ian.campbell@citrix.com> <5295E3AB.8090309@citrix.com> <1385555000.23112.182.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: <1385555000.23112.182.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 Cc: julien.grall@linaro.org, tim@xen.org, stefano.stabellini@eu.citrix.com, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On 27/11/13 12:23, Ian Campbell wrote: > On Wed, 2013-11-27 at 12:20 +0000, Andrew Cooper wrote: >> On 27/11/13 12:19, Ian Campbell wrote: >>> I was just about to send out patches adding the 1:1 workaround to vexpress (the >>> foundation model is a vexpress platfrom with DMA) and sunxi. >>> >>> That would have meant that all platforms now implement the quirk. Instead lets >>> just make it the default and remove the quirk. >>> >>> In the future this will likely be set based on the presence absence of an >>> IOMMU, perhaps with additional overrides by the platform. >>> >>> A command line option no-dom0_11_mapping is provided. >>> >>> Signed-off-by: Ian Campbell >> Can you patch docs/misc/xen-command-line.markdown as well please > I left it out on purpose, given the implications of using it I actually > want people to have to talk to us before using it. > > I'd be more inclined to remove the option that to document it. > > Ian. > Hmm ok - perhaps a comment beside boolean_param() indicating that this is a temporary hack and is expected to disappear completely in due course? ~Andrew