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

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 03/12/2018 03:26 PM, Sander Eikelenboom wrote:
> On 19/02/18 22:13, Sander Eikelenboom wrote:
>> 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.
> Hi Juergen,
>
> I don't know by which tree those patches should arrive at Linus,
> so i can't check if they fell through the cracks somewhere, but 4.16-rc5
> hasn't got them yet.
>


I was just about to send this exact question. Last I saw a note from
Ingo that he put it in tip:x86/boot
(https://lkml.org/lkml/2017/12/11/358) but I don't see it there. (And
I'd think it would have been pulled by Linus by now anyway)

-boris

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