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

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

On 19/02/18 11:16, Juergen Gross wrote:
> On 19/02/18 10:47, Sander Eikelenboom wrote:
>> 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).
> 
> Just sent a new patch series.

Just tested and it works fine here.

--
Sander

> 
> Juergen
> 


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