diff options
| -rw-r--r-- | Documentation/ABI/testing/debugfs-amd-iommu | 127 |
1 files changed, 72 insertions, 55 deletions
diff --git a/Documentation/ABI/testing/debugfs-amd-iommu b/Documentation/ABI/testing/debugfs-amd-iommu index c14b1620aec1..5621a66aa693 100644 --- a/Documentation/ABI/testing/debugfs-amd-iommu +++ b/Documentation/ABI/testing/debugfs-amd-iommu @@ -6,12 +6,14 @@ Description: MMIO register offset for iommu<x>, and the file outputs the corresponding MMIO register value of iommu<x> - Example: - $ echo "0x18" > /sys/kernel/debug/iommu/amd/iommu00/mmio - $ cat /sys/kernel/debug/iommu/amd/iommu00/mmio + Example:: + + $ echo "0x18" > /sys/kernel/debug/iommu/amd/iommu00/mmio + $ cat /sys/kernel/debug/iommu/amd/iommu00/mmio + + Output:: - Output: - Offset:0x18 Value:0x000c22000003f48d + Offset:0x18 Value:0x000c22000003f48d What: /sys/kernel/debug/iommu/amd/iommu<x>/capability Date: January 2025 @@ -21,12 +23,14 @@ Description: capability register offset for iommu<x>, and the file outputs the corresponding capability register value of iommu<x>. - Example: - $ echo "0x10" > /sys/kernel/debug/iommu/amd/iommu00/capability - $ cat /sys/kernel/debug/iommu/amd/iommu00/capability + Example:: + + $ echo "0x10" > /sys/kernel/debug/iommu/amd/iommu00/capability + $ cat /sys/kernel/debug/iommu/amd/iommu00/capability + + Output:: - Output: - Offset:0x10 Value:0x00203040 + Offset:0x10 Value:0x00203040 What: /sys/kernel/debug/iommu/amd/iommu<x>/cmdbuf Date: January 2025 @@ -35,24 +39,26 @@ Description: This file is a read-only output file containing iommu<x> command buffer entries. - Examples: - $ cat /sys/kernel/debug/iommu/amd/iommu<x>/cmdbuf - - Output: - CMD Buffer Head Offset:339 Tail Offset:339 - 0: 00835001 10000001 00003c00 00000000 - 1: 00000000 30000005 fffff003 7fffffff - 2: 00835001 10000001 00003c01 00000000 - 3: 00000000 30000005 fffff003 7fffffff - 4: 00835001 10000001 00003c02 00000000 - 5: 00000000 30000005 fffff003 7fffffff - 6: 00835001 10000001 00003c03 00000000 - 7: 00000000 30000005 fffff003 7fffffff - 8: 00835001 10000001 00003c04 00000000 - 9: 00000000 30000005 fffff003 7fffffff - 10: 00835001 10000001 00003c05 00000000 - 11: 00000000 30000005 fffff003 7fffffff - [...] + Examples:: + + $ cat /sys/kernel/debug/iommu/amd/iommu<x>/cmdbuf + + Output:: + + CMD Buffer Head Offset:339 Tail Offset:339 + 0: 00835001 10000001 00003c00 00000000 + 1: 00000000 30000005 fffff003 7fffffff + 2: 00835001 10000001 00003c01 00000000 + 3: 00000000 30000005 fffff003 7fffffff + 4: 00835001 10000001 00003c02 00000000 + 5: 00000000 30000005 fffff003 7fffffff + 6: 00835001 10000001 00003c03 00000000 + 7: 00000000 30000005 fffff003 7fffffff + 8: 00835001 10000001 00003c04 00000000 + 9: 00000000 30000005 fffff003 7fffffff + 10: 00835001 10000001 00003c05 00000000 + 11: 00000000 30000005 fffff003 7fffffff + [...] What: /sys/kernel/debug/iommu/amd/devid Date: January 2025 @@ -63,19 +69,26 @@ Description: interrupt remapping table and device table. Example: + 1. - $ echo 0000:01:00.0 > /sys/kernel/debug/iommu/amd/devid - $ cat /sys/kernel/debug/iommu/amd/devid + :: + + $ echo 0000:01:00.0 > /sys/kernel/debug/iommu/amd/devid + $ cat /sys/kernel/debug/iommu/amd/devid - Output: - 0000:01:00.0 + Output:: + + 0000:01:00.0 2. - $ echo 01:00.0 > /sys/kernel/debug/iommu/amd/devid - $ cat /sys/kernel/debug/iommu/amd/devid + :: + + $ echo 01:00.0 > /sys/kernel/debug/iommu/amd/devid + $ cat /sys/kernel/debug/iommu/amd/devid + + Output:: - Output: - 0000:01:00.0 + 0000:01:00.0 What: /sys/kernel/debug/iommu/amd/devtbl Date: January 2025 @@ -84,12 +97,14 @@ Description: This file is a read-only output file containing the device table entry for the device ID provided in /sys/kernel/debug/iommu/amd/devid. - Example: - $ cat /sys/kernel/debug/iommu/amd/devtbl + Example:: + + $ cat /sys/kernel/debug/iommu/amd/devtbl - Output: - DeviceId QWORD[3] QWORD[2] QWORD[1] QWORD[0] iommu - 0000:01:00.0 0000000000000000 20000001373b8013 0000000000000038 6000000114d7b603 iommu3 + Output:: + + DeviceId QWORD[3] QWORD[2] QWORD[1] QWORD[0] iommu + 0000:01:00.0 0000000000000000 20000001373b8013 0000000000000038 6000000114d7b603 iommu3 What: /sys/kernel/debug/iommu/amd/irqtbl Date: January 2025 @@ -98,17 +113,19 @@ Description: This file is a read-only output file containing valid IRT table entries for the device ID provided in /sys/kernel/debug/iommu/amd/devid. - Example: - $ cat /sys/kernel/debug/iommu/amd/irqtbl - - Output: - DeviceId 0000:01:00.0 - IRT[0000] 0000000000000020 0000000000000241 - IRT[0001] 0000000000000020 0000000000000841 - IRT[0002] 0000000000000020 0000000000002041 - IRT[0003] 0000000000000020 0000000000008041 - IRT[0004] 0000000000000020 0000000000020041 - IRT[0005] 0000000000000020 0000000000080041 - IRT[0006] 0000000000000020 0000000000200041 - IRT[0007] 0000000000000020 0000000000800041 - [...] + Example:: + + $ cat /sys/kernel/debug/iommu/amd/irqtbl + + Output:: + + DeviceId 0000:01:00.0 + IRT[0000] 0000000000000020 0000000000000241 + IRT[0001] 0000000000000020 0000000000000841 + IRT[0002] 0000000000000020 0000000000002041 + IRT[0003] 0000000000000020 0000000000008041 + IRT[0004] 0000000000000020 0000000000020041 + IRT[0005] 0000000000000020 0000000000080041 + IRT[0006] 0000000000000020 0000000000200041 + IRT[0007] 0000000000000020 0000000000800041 + [...] |