lkml.org 
[lkml]   [2015]   [May]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Xen-devel] [RFC 00/23] arm64: Add support for 64KB page granularity in Xen guest
On 05/15/2015 11:45 AM, David Vrabel wrote:
> 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?

I am thinking exactly the same thing as I am going over these patches.

-boris


\
 
 \ /
  Last update: 2015-05-15 19:01    [W:0.323 / U:1.576 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site