Messages in this thread | | | From | "Stephen Bates" <> | Subject | Re: [PATCH] pci: Add a acs_disable option for pci kernel parameter | Date | Mon, 30 Oct 2017 01:04:47 +0000 |
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>> This patch adds a new boot option to the pci kernel parameter called >> "acs_disable" that will disable ACS. This is useful for PCI peer to >> peer communication but can cause problems when IOVA isolation is >> required and an IOMMU is enabled. Use with care.
> Eww.
Thanks for the feedback Christoph. My sentiments exactly ;-).
> Can we please add smbios quirks for the systems where you've > observed this?
I can look at doing this. The issue with this approach is that it will require a kernel patch for each new system that is detected.
> we probably also want to keep the option just in case).
Agreed. At least then operators have a path to ACS disable prior to a quirk being accepted.
Stephen
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