From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932577AbbHGRMB (ORCPT ); Fri, 7 Aug 2015 13:12:01 -0400 Received: from smtp.citrix.com ([66.165.176.89]:30348 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932432AbbHGRMA (ORCPT ); Fri, 7 Aug 2015 13:12:00 -0400 X-IronPort-AV: E=Sophos;i="5.15,630,1432598400"; d="scan'208";a="289176044" Message-ID: <55C4E6A6.3010808@citrix.com> Date: Fri, 7 Aug 2015 18:11:02 +0100 From: Julien Grall User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.8.0 MIME-Version: 1.0 To: CC: , , , , , , , Subject: Re: [Xen-devel] [PATCH v3 00/20] xen/arm64: Add support for 64KB page References: <1438966019-19322-1-git-send-email-julien.grall@citrix.com> In-Reply-To: <1438966019-19322-1-git-send-email-julien.grall@citrix.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-DLP: MIA2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/08/15 17:46, Julien Grall wrote: > Hi all, > > 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 > - Convert xenfb to 64KB > - Check if backend in QEMU works with DOM0 64KB > - It may be possible to move some common define between > netback/netfront and blkfront/blkback in an header > > 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. > > A branch based on the latest linux/master can be found here: Sorry, I forgot to update this bits in the cover letter. It's based on xentip for-linus-4.3 and depends on "Use correctly the Xen memory terminologies". The v3 has been sent few minutes ago [1] > > git://xenbits.xen.org/people/julieng/linux-arm.git branch xen-64k-v3 > > Comments, suggestions are welcomed. > > Sincerely yours, [1] http://lists.xen.org/archives/html/xen-devel/2015-08/msg00619.html -- Julien Grall