Re: [PATCH v7 08/12] PCI: liveupdate: Inherit ACS flags in incoming preserved devices

[Pasha Tatashin]

On Fri, 10 Jul 2026 21:26:11 +0000, David Matlack <dmatlack@xxxxxxxxxx> wrote:
> Inherit Access Control Services (ACS) flags on all incoming preserved
> devices (endpoints and upstream bridges) during a Live Update.
> 
> Inheriting ACS flags avoids changing routing rules while memory
> transactions are in flight from preserved devices. This is also strictly
> necessary to ensure that IOMMU group assignments do not change across
> a Live Update for preserved devices, as changing ACS configurations can
> split or merge IOMMU groups.
> 
> [...]

Reviewed-by: Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>

-- 
Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>