From: david.vrabel@citrix.com (David Vrabel)
To: linux-arm-kernel@lists.infradead.org
Subject: [Xen-devel] [RFC 00/23] arm64: Add support for 64KB page granularity in Xen guest
Date: Fri, 15 May 2015 16:45:47 +0100 [thread overview]
Message-ID: <555614AB.9000006@citrix.com> (raw)
In-Reply-To: <1431622863-28575-1-git-send-email-julien.grall@citrix.com>
On 14/05/15 18:00, 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.
The key problem I see with this approach is the confusion between guest
page size and Xen page size. This is going to be particularly
problematic since the majority of development/usage will remain on x86
where PAGE_SIZE == XEN_PAGE_SIZE.
I think it would be nice to keep XEN_PAGE_SIZE etc out of front and
backend drivers. Perhaps with a suitable set of helper functions?
David
next prev parent reply other threads:[~2015-05-15 15:45 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-14 17:00 [RFC 00/23] arm64: Add support for 64KB page granularity in Xen guest Julien Grall
2015-05-14 17:00 ` [RFC 01/23] xen: Include xen/page.h rather than asm/xen/page.h Julien Grall
2015-05-19 13:50 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 02/23] xen/xenbus: client: Fix call of virt_to_mfn in xenbus_grant_ring Julien Grall
2015-05-19 13:51 ` [Xen-devel] " David Vrabel
2015-05-19 14:12 ` Julien Grall
2015-05-14 17:00 ` [RFC 03/23] xen/grant-table: Remove unused macro SPP Julien Grall
2015-05-19 13:52 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 04/23] block/xen-blkfront: Remove unused macro MAXIMUM_OUTSTANDING_BLOCK_REQS Julien Grall
2015-05-20 14:36 ` Roger Pau Monné
2015-05-14 17:00 ` [RFC 05/23] block/xen-blkfront: Remove invalid comment Julien Grall
2015-05-20 14:42 ` Roger Pau Monné
2015-05-14 17:00 ` [RFC 06/23] block/xen-blkback: s/nr_pages/nr_segs/ Julien Grall
2015-05-20 14:54 ` Roger Pau Monné
2015-05-14 17:00 ` [RFC 07/23] net/xen-netfront: Correct printf format in xennet_get_responses Julien Grall
2015-05-19 13:53 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 08/23] net/xen-netback: Remove unused code in xenvif_rx_action Julien Grall
2015-05-15 0:26 ` Wei Liu
2015-05-14 17:00 ` [RFC 09/23] arm/xen: Drop duplicate define mfn_to_virt Julien Grall
2015-06-23 13:25 ` Stefano Stabellini
2015-06-23 13:53 ` [Xen-devel] " Julien Grall
2015-05-14 17:00 ` [RFC 10/23] xen/biomerge: WORKAROUND always says the biovec are not mergeable Julien Grall
2015-05-15 15:54 ` Boris Ostrovsky
2015-05-19 14:16 ` Julien Grall
2015-05-14 17:00 ` [RFC 11/23] xen: Add Xen specific page definition Julien Grall
2015-05-14 17:00 ` [RFC 12/23] xen: Extend page_to_mfn to take an offset in the page Julien Grall
2015-05-19 13:57 ` [Xen-devel] " David Vrabel
2015-05-19 14:18 ` Julien Grall
2015-05-14 17:00 ` [RFC 13/23] xen/xenbus: Use Xen page definition Julien Grall
2015-05-19 13:59 ` [Xen-devel] " David Vrabel
2015-05-19 14:19 ` Julien Grall
2015-05-14 17:00 ` [RFC 14/23] tty/hvc: xen: Use xen " Julien Grall
2015-05-14 17:00 ` [RFC 15/23] xen/balloon: Don't rely on the page granularity is the same for Xen and Linux Julien Grall
2015-05-19 15:23 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 16/23] xen/events: fifo: Make it running on 64KB granularity Julien Grall
2015-05-19 15:25 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 17/23] xen/grant-table: " Julien Grall
2015-05-19 15:27 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 18/23] block/xen-blkfront: Make it running on 64KB page granularity Julien Grall
2015-05-14 17:00 ` [RFC 19/23] block/xen-blkback: " Julien Grall
2015-05-14 17:01 ` [RFC 20/23] net/xen-netfront: " Julien Grall
2015-05-14 17:01 ` [RFC 21/23] net/xen-netback: " Julien Grall
2015-05-15 2:35 ` Wei Liu
2015-05-15 12:35 ` [Xen-devel] " Julien Grall
2015-05-15 15:31 ` Wei Liu
2015-05-15 15:41 ` Ian Campbell
2015-05-18 12:11 ` Julien Grall
2015-05-18 12:54 ` Wei Liu
2015-05-19 22:56 ` Julien Grall
2015-05-20 8:26 ` Wei Liu
2015-05-20 14:26 ` Julien Grall
2015-05-20 14:29 ` Julien Grall
2015-05-14 17:01 ` [RFC 22/23] xen/privcmd: Add support for Linux " Julien Grall
2015-05-19 15:39 ` [Xen-devel] " David Vrabel
2015-06-18 17:05 ` Julien Grall
2015-05-14 17:01 ` [RFC 23/23] arm/xen: Add support for " Julien Grall
2015-06-23 14:19 ` Stefano Stabellini
2015-06-23 14:37 ` Julien Grall
2015-06-23 14:49 ` Stefano Stabellini
2015-06-23 15:02 ` [Xen-devel] " Julien Grall
2015-06-23 16:12 ` Stefano Stabellini
2015-05-15 15:45 ` David Vrabel [this message]
2015-05-15 15:51 ` [Xen-devel] [RFC 00/23] arm64: Add support for 64KB page granularity in Xen guest Boris Ostrovsky
2015-05-18 12:23 ` Julien Grall
2015-06-23 13:37 ` Stefano Stabellini
2015-06-23 13:41 ` Stefano Stabellini
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