Re: [Xen-devel] [PATCH v2] libxl: put RSDP for PVH guest near 4GB

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

On 24/01/18 16:26, George Dunlap wrote:
> On Wed, Jan 24, 2018 at 3:20 PM, Juergen Gross <jgross@xxxxxxxx> wrote:
>> On 24/01/18 16:07, George Dunlap wrote:
>>> On Wed, Jan 24, 2018 at 2:10 PM, Boris Ostrovsky
>>> <boris.ostrovsky@xxxxxxxxxx> wrote:
>>>> On 01/24/2018 07:06 AM, Juergen Gross wrote:
>>>>> On 24/01/18 11:54, Roger Pau Monné wrote:
>>>>>> On Wed, Jan 24, 2018 at 10:42:39AM +0000, George Dunlap wrote:
>>>>>>> On Wed, Jan 24, 2018 at 2:41 AM, Boris Ostrovsky
>>>>>>> <boris.ostrovsky@xxxxxxxxxx> wrote:
>>>>>>>> On 01/18/2018 05:33 AM, Wei Liu wrote:
>>>>>>>>> On Thu, Jan 18, 2018 at 11:31:32AM +0100, Juergen Gross wrote:
>>>>>>>>>> Wei,
>>>>>>>>>>
>>>>>>>>>> On 01/12/17 15:14, Juergen Gross wrote:
>>>>>>>>>>> Instead of locating the RSDP table below 1MB put it just below 4GB
>>>>>>>>>>> like the rest of the ACPI tables in case of PVH guests. This will
>>>>>>>>>>> avoid punching more holes than necessary into the memory map.
>>>>>>>>>>>
>>>>>>>>>>> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
>>>>>>>>>>> Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
>>>>>>>>>> Mind applying this one?
>>>>>>>>> Don't worry, it is in my queue.
>>>>>>>>>
>>>>>>>>> Will come to this and other patches I accumulated soon.
>>>>>>>>>
>>>>>>>>> Wei.
>>>>>>>> This requires kernel changes, doesn't it?
>>>>>>>>
>>>>>>>> https://lists.xenproject.org/archives/html/xen-devel/2017-12/msg00714.html
>>>>>>>>
>>>>>>>> And this series apparently never made it to the tree.
>>>>>>>>
>>>>>>>> PVH guests are broken now on staging.
>>>>>>> And the Linux side of PVH is officially supported now, right?
>>>>
>>>>
>>>> AFAIK PVH is still considered a tech preview --- Linux or Xen.
>>>
>>> From SUPPORT.md:
>>>
>>> ### x86/PVH guest
>>>
>>>     Status: Supported
>>>
>>> I was under the impression that PVH guest in Linux was complete and
>>> stable as of Linux 4.11.  If that's not true it should have been
>>> brought up during the 4.10 development cycle, where we declared PVH
>>> domUs as "supported".
>>
>> So what is the problem here?
>>
>> - current Linux can't be booted as PVH guest with xen-unstable due to
>>   a bug in Linux, patches for Linux are being worked on
>> - booting Linux as PVH guest with xen 4.10 is working
> 
> I was responding to Boris's claim that PVH is considered tech preview.
> I can't say anything one way or the other about PVH in Linux, but PVH
> in Xen is definitely now considered supported.
> 
> My subsequent response to Roger ("FWIW I can buy this argument") was
> meant to indicate I didn't have any more objection to the approach you
> guys were planning on taking.
> 
>  -George

L.S.,

Seems I lost track, is there any progress on this issue ?
(doesn't seem a fix has landed in 4.16-rc2 yet).

--
Sander


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