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