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AMD-Vi support for IOMMU sysfs. This allows us to associate devices with a specific IOMMU device and examine the capabilities and features of that IOMMU. The AMD IOMMU is hosted on and actual PCI device, so we make that device the parent for the IOMMU class device. This initial implementaiton exposes only the capability header and extended features register for the IOMMU. # find /sys | grep ivhd /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:00.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:02.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:04.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:09.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:11.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:12.0 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:12.2 /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/devices/0000:00:13.0 ... /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/power /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/power/control ... /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/device /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/subsystem /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/amd-iommu /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/amd-iommu/cap /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/amd-iommu/features /sys/devices/pci0000:00/0000:00:00.2/iommu/ivhd0/uevent /sys/class/iommu/ivhd0 Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
15 lines
440 B
Plaintext
15 lines
440 B
Plaintext
What: /sys/class/iommu/<iommu>/amd-iommu/cap
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Date: June 2014
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KernelVersion: 3.17
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Contact: Alex Williamson <alex.williamson@redhat.com>
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Description:
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IOMMU capability header as documented in the AMD IOMMU
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specification. Format: %x
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What: /sys/class/iommu/<iommu>/amd-iommu/features
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Date: June 2014
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KernelVersion: 3.17
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Contact: Alex Williamson <alex.williamson@redhat.com>
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Description:
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Extended features of the IOMMU. Format: %llx
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