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Diffstat (limited to 'Documentation/ABI/testing/debugfs-vfio')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-vfio | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-vfio b/Documentation/ABI/testing/debugfs-vfio new file mode 100644 index 000000000..ed2f29c3a --- /dev/null +++ b/Documentation/ABI/testing/debugfs-vfio @@ -0,0 +1,57 @@ +What: /sys/kernel/debug/vfio +Date: December 2023 +KernelVersion: 6.8 +Contact: Longfang Liu <liulongfang@huawei.com> +Description: This debugfs file directory is used for debugging + of vfio devices, it's a common directory for all vfio devices. + Vfio core will create a device subdirectory under this + directory. + +What: /sys/kernel/debug/vfio/<device>/migration +Date: December 2023 +KernelVersion: 6.8 +Contact: Longfang Liu <liulongfang@huawei.com> +Description: This debugfs file directory is used for debugging + of vfio devices that support live migration. + The debugfs of each vfio device that supports live migration + could be created under this directory. + +What: /sys/kernel/debug/vfio/<device>/migration/state +Date: December 2023 +KernelVersion: 6.8 +Contact: Longfang Liu <liulongfang@huawei.com> +Description: Read the live migration status of the vfio device. + The contents of the state file reflects the migration state + relative to those defined in the vfio_device_mig_state enum + +What: /sys/kernel/debug/vfio/<device>/migration/features +Date: Oct 2025 +KernelVersion: 6.18 +Contact: Cédric Le Goater <clg@redhat.com> +Description: Read the migration features of the vfio device. + +What: /sys/kernel/debug/vfio/<device>/pci +Date: June 2026 +KernelVersion: 7.2 +Contact: Alex Williamson <alex.williamson@nvidia.com> +Description: This debugfs file directory is used for debugging + VFIO PCI devices. + +What: /sys/kernel/debug/vfio/<device>/pci/nointxmask +Date: June 2026 +KernelVersion: 7.2 +Contact: Alex Williamson <alex.williamson@nvidia.com> +Description: Read the nointxmask policy latched for this device. This + policy governs whether the device may use PCI 2.3 style + INTx masking when supported, reporting a value of "N", or + requires APIC level INTx masking, reporting a value of "Y". + +What: /sys/kernel/debug/vfio/<device>/pci/disable_idle_d3 +Date: June 2026 +KernelVersion: 7.2 +Contact: Alex Williamson <alex.williamson@nvidia.com> +Description: Read the disable_idle_d3 policy latched for this device. This + policy governs whether the device PM runtime usage count is + kept elevated while the device is bound to the driver and + unused, reporting a value of "Y", or decremented to allow the + device to enter a low power state, reporting a value of "N". |