Re: [PATCH 0/7] hw/i386/amd_iommu: Cleanups and fixes

[Vasant Hegde <vasant.hegde@amd.com>]

Alejandro, Sairaj,


On 7/17/2025 7:18 PM, Alejandro Jimenez wrote:
> 
> 
> On 7/17/25 2:07 AM, Michael S. Tsirkin wrote:
>> On Thu, Jul 17, 2025 at 11:17:05AM +0530, Sairaj Kodilkar wrote:
>>>
>>>
>>> On 7/16/2025 6:59 PM, Michael S. Tsirkin wrote:
>>>> On Wed, Jul 16, 2025 at 06:26:37PM +0530, Sairaj Kodilkar wrote:
>>>>>


.../...

>>>
>>> Hey Michael,
>>>
>>> Sorry, I should have mentioned which series I am talking about,
>>> https://lore.kernel.org/qemu-devel/20250502021605.1795985-1-\
>>> alejandro.j.jimenez@oracle.com/
>>
>>
>> Alejandro said he will send v3 of this.
>>
> 
> Yes, I am working on this task, and expect to send the new revision soon. The
> pending issue I am working to address (failures on reboot when guest boots with
> forcedac=1) also requires a change in the VFIO host kernel driver, but I will
> send the QEMU patches as soon as that portion is ready.

Sure. May be for now keep that as known issue and move on ? we can fix it later.

Other thought (Again it can be separate patch/series)

Ankit's kernel side fix to support different host page table level is queued for
next merge window. How about reducing MAX host page table level support from
current 6 level to 4 level? I think this should help to improve performance
little bit as well.


[1]
https://lore.kernel.org/linux-iommu/8109b208f87b80e400c2abd24a2e44fcbc0763a5.1749016436.git.Ankit.Soni@amd.com/


-Vasant