mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-11-08 18:57:22 +00:00
073e638125
Some NVIDIA GPU/NIC devices, though they don't implement CXL config space, have many CXL-like properties. Call this kind "pre-CXL". Similar to CXL.cache capability, these pre-CXL devices also require the ATS function even when their RIDs are IOMMU bypassed, i.e. keep ATS "always on" v.s. "on demand" when a non-zero PASID line gets enabled in SVA use cases. Introduce pci_dev_specific_ats_required() quirk function to scan a list of IDs for these devices. Then, include it in pci_ats_required(). Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Nirmoy Das <nirmoyd@nvidia.com> Tested-by: Nirmoy Das <nirmoyd@nvidia.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com> Reviewed-by: Yi Liu <yi.l.liu@intel.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
621 lines
14 KiB
621 lines
14 KiB