[pve-devel] [PATCH pve-kernel/master 0/2] fix two small issues with IOMMU in certain setups

[Stoiko Ivanov]

stubled across https://bugzilla.proxmox.com/show_bug.cgi?id=5926 which
mentioned kernel-issues related to the 8.3.0 release - so took a quick look.

While I think that the issues were not directly related to 8.3 (or the
kernel version shipped with it (see bugzilla)) - one issue seemed to
be easily addressable with a cherry-pick from kernel.org stable-6.11.7
(patch 1/2)

the second patch addresses an unrleated issue reported in our forums:
https://forum.proxmox.com/threads/.157266
see the commit-message of the patch for a bit more information - but it
basically reverts a patch from Ubuntu-upstream, as this broke iGPU
passthrough for old Intel-CPUs (without the patch users affected by the
issue reported to Ubuntu had the options of disabling iommu via
kernel-cmdline anyways).

I'd suggest pulling patch 2/2 also for our kernel 6.8.


Stoiko Ivanov (2):
  fix #5926: cherry-pick ACS-quirk fix from linux-stable/6.11.7
  revert Ubuntu patch disabling IOMMU functionality for Skylake iGPU

 ...nable_acs-support-for-the-ACS-quirks.patch | 68 +++++++++++++++++++
 ...UCE-iommu-intel-disable-DMAR-for-SKL.patch | 53 +++++++++++++++
 2 files changed, 121 insertions(+)
 create mode 100644 patches/kernel/0016-PCI-Fix-pci_enable_acs-support-for-the-ACS-quirks.patch
 create mode 100644 patches/kernel/0017-Revert-UBUNTU-SAUCE-iommu-intel-disable-DMAR-for-SKL.patch

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