From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v4 00/20] xen/arm64: Add support for 64KB page in Linux Date: Fri, 11 Sep 2015 20:39:33 +0100 Message-ID: <55F32DF5.5050504__32539.4958178096$1442000540$gmane$org@citrix.com> References: <1441640038-23615-1-git-send-email-julien.grall@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ZaUBl-0005Bu-Rq for xen-devel@lists.xenproject.org; Fri, 11 Sep 2015 19:40:49 +0000 In-Reply-To: <1441640038-23615-1-git-send-email-julien.grall@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: xen-devel@lists.xenproject.org Cc: wei.liu2@citrix.com, ian.campbell@citrix.com, stefano.stabellini@eu.citrix.com, linux-kernel@vger.kernel.org, david.vrabel@citrix.com, boris.ostrovsky@oracle.com, linux-arm-kernel@lists.infradead.org, roger.pau@citrix.com List-Id: xen-devel@lists.xenproject.org Hi, A quick update on the TODO. On 07/09/15 16:33, Julien Grall wrote: > ARM64 Linux is supporting both 4KB and 64KB page granularity. Although, Xen > hypercall interface and PV protocol are always based on 4KB page granularity. > > Any attempt to boot a Linux guest with 64KB pages enabled will result to a > guest crash. > > This series is a first attempt to allow those Linux running with the current > hypercall interface and PV protocol. > > This solution has been chosen because we want to run Linux 64KB in released > Xen ARM version or/and platform using an old version of Linux DOM0. > > There is room for improvement, such as support of 64KB grant, modification > of PV protocol to support different page size... They will be explored in a > separate patch series later. > > TODO list: > - Convert swiotlb to 64KB Sent http://lists.xen.org/archives/html/xen-devel/2015-09/msg01292.html > - Convert xenfb to 64KB > - Support for multiple page ring support > - Support for 64KB in gnttdev > - Support of non-indirect grant with 64KB frontend Sent http://lists.xen.org/archives/html/xen-devel/2015-09/msg01577.html > - It may be possible to move some common define between > netback/netfront and blkfront/blkback in an header > > I've got most of the patches for the TODO items. I'm planning to send them as > a follow-up as it's not a requirement for a basic guests. > > All patches has been built tested for ARM32, ARM64, x86. But I haven't tested > to run it on x86 as I don't have a box with Xen x86 running. I would be > happy if someone give a try and see possible regression for x86. > > I know that Konrad as a test-suite for x86. Konrand, would it be possible to > give a run to for this series? > > A branch based on the latest xentip/for-linus-4.3 can be found here: > > git://xenbits.xen.org/people/julieng/linux-arm.git branch xen-64k-v4 I will resend a new version when 4.3-rc1 is out in order to fix any possible conflict with linux/master. I already know that the netback patch (#18) is conflicting with 1d5d48523900a4b0f25d6b52f1a93c84bd671186 "xen-netback: require fewer guest Rx slots when not using GSO". If the 2 series above are completely acked/reviewed, I will fold them in this series. Regards, -- Julien Grall