c61959ec - iommu: Add sysfs support for IOMMUs

Thu, 12 Jun 2014 22:12:24 +0000

iommu: Add sysfs support for IOMMUsIOMMUs currently have no common representation to userspace, mostseem to have no representation at all aside from a few printkson bootup. There are however features of IOMMUs that are usefulto know about. For instance the IOMMU might support superpages,making use of processor large/huge pages more important in a deviceassignment scenario. It's also useful to create cross links betweendevices and IOMMU hardware units, so that users might be able toload balance their devices to avoid thrashing a single hardware unit.This patch adds a device create and destroy interface as well asdevice linking, making it very lightweight for an IOMMU driver to addbasic support. IOMMU drivers can provide additional attributesautomatically by using an attribute_group.The attributes exposed are expected to be relatively device specific,the means to retrieve them certainly are, so there are currently nocommon attributes for the new class created here.Signed-off-by: Alex Williamson Signed-off-by: Joerg Roedel List of files: /linux-6.15/Documentation/ABI/testing/sysfs-class-iommu

Changes in sysfs-class-iommu

c61959ec - iommu: Add sysfs support for IOMMUs