[pve-devel] applied: Re: [PATCH qemu] drop patch force-disabling smm

[Thomas Lamprecht <t.lamprecht@proxmox.com>]

On 24/08/2021 10:52, Stefan Reiter wrote:
> On 8/23/21 6:01 PM, Thomas Lamprecht wrote:
>> On 10/08/2021 15:47, alexandre derumier wrote:
>>> Le mardi 10 août 2021 à 09:55 +0200, Wolfgang Bumiller a écrit :
>>>> This drops debian/patches/pve/0005-PVE-Config-smm_available-
>>>> false.patch
>>>> (and renumbers the remaining patches)
>>>>
>>>>  From what I could gather, this patch was originally added
>>>> due to issues with old kernels. Now we have users which
>>>> seem to run into issues *with* the patch.
>>> yes indeed, this was old kernel with some old processors.
>>>
>>>
>>> Just be carefull with live migration, I wonder if it's not breaking
>>> migration it you just remove it like that.
>>> (Maybe it could be better to remove it for qemu > 6.1, it should be
>>> tested)
>>>
>>
>> Did anybody tested this on live migration (on a system where it would
>> actually toggle to true)?
> 
> I've tested live-migration in both directions (with patch <-> current),
> Linux and Windows guests on a nested setup (but SMM is emulated in QEMU
> so nested shouldn't matter AFAIU). All worked without issue.
> 
> I'm not sure if there is something specific a guest would need to do to
> exercise SMM support, but since we're turning it on, not off, I'm pretty
> sure that at least forward migration should always work.

sounds sensible

> 
> Tested-by: Stefan Reiter <s.reiter@proxmox.com>

thanks to all of you, with that T-b tag applied.