On Wed, Sep 23, 2020 at 12:13:44PM +0000, Suravee Suthikulpanit wrote: > Suravee Suthikulpanit (3): > iommu: amd: Use 4K page for completion wait write-back semaphore > iommu: amd: Add support for RMP_PAGE_FAULT and RMP_HW_ERR > iommu: amd: Re-purpose Exclusion range registers to support SNP CWWB
Applied, thanks. I am slightly concerned about the re-purposing of the exclusion-range registers based on a feature bit being set. This makes the hardware incompatible to older IOMMU drivers which do not check the FEATURE_SNP bit. It will probably work in this case, as the firmware on systems with IOMMU-SNP support will not declare exclusion ranges at all and exclusion-ranges in the IOMMU hardware have been a bad idea since forever, but it would have been nicer if hardware actually provided a bit to enable this behavior. Regards, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu