Re: [PATCH v7 08/12] PCI: liveupdate: Inherit ACS flags in incoming preserved devices
Pasha Tatashin <[email protected]> Fri, 17 Jul 2026 22:08:05 +0000
| Newsgroups | org.infradead.lists.kexec,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pci,org.kvack.linux-mm |
|---|---|
| Message-ID | <178432608536.189683.17937493816735356455.b4-review@b4> |
On Fri, 10 Jul 2026 21:26:11 +0000, David Matlack <[email protected]> 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 <[email protected]> -- Pasha Tatashin <[email protected]>