From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v5] xen/iommu: smmu: Advertise when the SMMU support coherent table walk Date: Tue, 03 Mar 2015 12:19:51 +0000 Message-ID: <54F5A6E7.30303@linaro.org> References: <1425310963-20948-1-git-send-email-julien.grall@linaro.org> <1425315868.24959.20.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1YSlnn-00085e-V1 for xen-devel@lists.xenproject.org; Tue, 03 Mar 2015 12:19:56 +0000 Received: by wiwh11 with SMTP id h11so22188112wiw.1 for ; Tue, 03 Mar 2015 04:19:54 -0800 (PST) In-Reply-To: <1425315868.24959.20.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, stefano.stabellini@citrix.com, tim@xen.org List-Id: xen-devel@lists.xenproject.org On 02/03/2015 17:04, Ian Campbell wrote: > On Mon, 2015-03-02 at 15:42 +0000, Julien Grall wrote: >> I've just noticed that the support on the previous driver (i.e in >> Xen 4.5) may incorrectly expose this feature when all the SMMUs is >> not supporting coherent table walk. >> >> I'm not sure, if I should send a patch for it. > > Probably not a lot of point given the dearth of hardware where it would > actually matter? IGiven there is a lake of PCI support in the SMMU for Xen 4.5, I guess we can consider the driver not usable in new hardware. Regards, -- Julien Grall