From: Robin Murphy <robin.murphy@arm.com>
Sent: Friday, July 15, 2022 9:13 PM

On 2022-07-05 18:08, Robin Murphy wrote:

quoted

v2: https://lore.kernel.org/linux-

iommu/cover.1650890638.git.robin.murphy@arm.com/

quoted

Hi all,

Here's v3, now with working x86! Having finally made sense of how I
broke Intel, I've given AMD the same fix by inspection. I'm still not
100% sure about s390, but it looks like it should probably be OK since
it seems to register an IOMMU instance for each PCI device (?!) before
disappearing into PCI hotplug code, wherein I assume we should never see
a PCI device appear without its IOMMU already registered.

Otherwise, the only other updates are hooking up the new host1x context
bus (noting that it now takes all of 4 lines to support a whole new bus,
yay!), and a slight tweak to make sure we keep rejecting registration of
conflicting iommu_ops rather than needlessly change that just yet.

FWIW I've prepared v4, including Matt's s390 patch and some nice extra
cleanups thanks to Kevin's suggestions, but have now decided to wait to
rebase and send it after the upcoming merge window. If anyone's
interested in the meantime, there's a preliminary branch here:

https://gitlab.arm.com/linux-arm/linux-rm/-/commits/bus-set-iommu-v4

(temporarily including the host1x patch from -next to avoid breakage on
arm64 as well)

This looks good to me.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel