Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1945987AbbHGQte (ORCPT ); Fri, 7 Aug 2015 12:49:34 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:42019 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932577AbbHGQsN (ORCPT ); Fri, 7 Aug 2015 12:48:13 -0400 X-IronPort-AV: E=Sophos;i="5.15,630,1432598400"; d="scan'208";a="292474702" From: Julien Grall To: CC: , , , , "Julien Grall" , , , , , Subject: [PATCH v3 00/20] xen/arm64: Add support for 64KB page Date: Fri, 7 Aug 2015 17:46:39 +0100 Message-ID: <1438966019-19322-1-git-send-email-julien.grall@citrix.com> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4067 Lines: 100 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: git://xenbits.xen.org/people/julieng/linux-arm.git branch xen-64k-v3 Comments, suggestions are welcomed. Sincerely yours, Cc: david.vrabel@citrix.com Cc: konrad.wilk@oracle.com Cc: boris.ostrovsky@oracle.com Cc: wei.liu2@citrix.com Cc: roger.pau@citrix.com Julien Grall (20): net/xen-netback: xenvif_gop_frag_copy: move GSO check out of the loop arm/xen: Drop pte_mfn and mfn_pte xen: Add Xen specific page definition xen/grant: Introduce helpers to split a page into grant xen/grant: Add helper gnttab_page_grant_foreign_access_ref_one block/xen-blkfront: Split blkif_queue_request in 2 block/xen-blkfront: Store a page rather a pfn in the grant structure block/xen-blkfront: split get_grant in 2 xen/biomerge: Don't allow biovec to be merge when Linux is not using 4KB page xen/xenbus: Use Xen page definition tty/hvc: xen: Use xen page definition xen/balloon: Don't rely on the page granularity is the same for Xen and Linux xen/events: fifo: Make it running on 64KB granularity xen/grant-table: Make it running on 64KB granularity block/xen-blkfront: Make it running on 64KB page granularity block/xen-blkback: Make it running on 64KB page granularity net/xen-netfront: Make it running on 64KB page granularity net/xen-netback: Make it running on 64KB page granularity xen/privcmd: Add support for Linux 64KB page granularity arm/xen: Add support for 64KB page granularity arch/arm/include/asm/xen/page.h | 18 +- arch/arm/xen/enlighten.c | 6 +- arch/arm/xen/p2m.c | 6 +- arch/x86/include/asm/xen/page.h | 2 +- drivers/block/xen-blkback/blkback.c | 5 +- drivers/block/xen-blkback/common.h | 17 +- drivers/block/xen-blkback/xenbus.c | 9 +- drivers/block/xen-blkfront.c | 552 +++++++++++++++++++++++------------- drivers/net/xen-netback/common.h | 15 +- drivers/net/xen-netback/netback.c | 163 +++++++---- drivers/net/xen-netfront.c | 122 +++++--- drivers/tty/hvc/hvc_xen.c | 4 +- drivers/xen/balloon.c | 47 ++- drivers/xen/biomerge.c | 8 + drivers/xen/events/events_base.c | 2 +- drivers/xen/events/events_fifo.c | 2 +- drivers/xen/grant-table.c | 32 ++- drivers/xen/privcmd.c | 8 +- drivers/xen/xenbus/xenbus_client.c | 6 +- drivers/xen/xenbus/xenbus_probe.c | 3 +- drivers/xen/xlate_mmu.c | 124 +++++--- include/xen/grant_table.h | 51 ++++ include/xen/page.h | 27 +- 23 files changed, 844 insertions(+), 385 deletions(-) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/