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authorDave Airlie <airlied@redhat.com>2026-09-26 07:57:59 +1000
committerDave Airlie <airlied@redhat.com>2026-09-26 07:58:24 +1000
commita9ed3aa9b87ee41e8ab3ff471b1331c154767e45 (patch)
treecc62d74e0eb4905246978674461e78e2f9df2afd /Documentation/ABI/testing/debugfs-vfio
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Merge tag 'drm-misc-fixes-2026-09-24' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixesgrafted
A number of fixes: - bridge: - samsung-dsim: fix GPIO lifetime - client: Null pointer dereference fix - imagination: error handling fix, page handling fix - nouveau: fix reference leaks, double-frees, out-of-bounds accesses, use-after-frees, don't reject config without SCDC, a number of workarounds - virtio: fix memory leak, reference leaks, null pointer dereference, add pixel blend mode, cache coherency fix Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <self@mripard.dev> Link: https://patch.msgid.link/arU22zzqUGDEco1y@houat
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+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".