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authorDapeng Mi <dapeng1.mi@linux.intel.com>2026-09-17 09:52:33 +0800
committerIngo Molnar <mingo@kernel.org>2026-09-22 11:37:46 +0200
commit0102c8c7fdfc4bd700971daff2b94470f4eafae4 (patch)
tree531306c2299f9a269f0a986e29f17ba972180104 /Documentation/ABI/testing/configfs-most
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perf/x86/intel: Rename DMR offcore_rsp attribute to offmodule_rspgrafted
DMR introduces Offmodule Response events in place of the legacy Offcore Response events, but it still exposes the inherited offcore_rsp PMU attribute for programming the corresponding MSR data. Rename the DMR PMU attribute to offmodule_rsp so the sysfs interface matches the underlying event name and avoids user & tooling confusion. Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://patch.msgid.link/20260917015234.981153-12-dapeng1.mi@linux.intel.com
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+What: /sys/kernel/config/most_<component>
+Date: March 8, 2019
+KernelVersion: 5.2
+Description: Interface is used to configure and connect device channels
+ to component drivers.
+
+ Attributes are visible only when configfs is mounted. To mount
+ configfs in /sys/kernel/config directory use:
+ # mount -t configfs none /sys/kernel/config/
+
+
+What: /sys/kernel/config/most_cdev/<link>
+Date: March 8, 2019
+KernelVersion: 5.2
+Description:
+ The attributes:
+
+ buffer_size
+ configure the buffer size for this channel
+
+ subbuffer_size
+ configure the sub-buffer size for this channel
+ (needed for synchronous and isochronous data)
+
+
+ num_buffers
+ configure number of buffers used for this
+ channel
+
+ datatype
+ configure type of data that will travel over
+ this channel
+
+ direction
+ configure whether this link will be an input
+ or output
+
+ dbr_size
+ configure DBR data buffer size (this is used
+ for MediaLB communication only)
+
+ packets_per_xact
+ configure the number of packets that will be
+ collected from the network before being
+ transmitted via USB (this is used for USB
+ communication only)
+
+ device
+ name of the device the link is to be attached to
+
+ channel
+ name of the channel the link is to be attached to
+
+ comp_params
+ pass parameters needed by some components
+
+ create_link
+ write '1' to this attribute to trigger the
+ creation of the link. In case of speculative
+ configuration, the creation is post-poned until
+ a physical device is being attached to the bus.
+
+ destroy_link
+ write '1' to this attribute to destroy an
+ active link
+
+What: /sys/kernel/config/most_video/<link>
+Date: March 8, 2019
+KernelVersion: 5.2
+Description:
+ The attributes:
+
+ buffer_size
+ configure the buffer size for this channel
+
+ subbuffer_size
+ configure the sub-buffer size for this channel
+ (needed for synchronous and isochronous data)
+
+
+ num_buffers
+ configure number of buffers used for this
+ channel
+
+ datatype
+ configure type of data that will travel over
+ this channel
+
+ direction
+ configure whether this link will be an input
+ or output
+
+ dbr_size
+ configure DBR data buffer size (this is used
+ for MediaLB communication only)
+
+ packets_per_xact
+ configure the number of packets that will be
+ collected from the network before being
+ transmitted via USB (this is used for USB
+ communication only)
+
+ device
+ name of the device the link is to be attached to
+
+ channel
+ name of the channel the link is to be attached to
+
+ comp_params
+ pass parameters needed by some components
+
+ create_link
+ write '1' to this attribute to trigger the
+ creation of the link. In case of speculative
+ configuration, the creation is post-poned until
+ a physical device is being attached to the bus.
+
+ destroy_link
+ write '1' to this attribute to destroy an
+ active link
+
+What: /sys/kernel/config/most_net/<link>
+Date: March 8, 2019
+KernelVersion: 5.2
+Description:
+ The attributes:
+
+ buffer_size
+ configure the buffer size for this channel
+
+ subbuffer_size
+ configure the sub-buffer size for this channel
+ (needed for synchronous and isochronous data)
+
+
+ num_buffers
+ configure number of buffers used for this
+ channel
+
+ datatype
+ configure type of data that will travel over
+ this channel
+
+ direction
+ configure whether this link will be an input
+ or output
+
+ dbr_size
+ configure DBR data buffer size (this is used
+ for MediaLB communication only)
+
+ packets_per_xact
+ configure the number of packets that will be
+ collected from the network before being
+ transmitted via USB (this is used for USB
+ communication only)
+
+ device
+ name of the device the link is to be attached to
+
+ channel
+ name of the channel the link is to be attached to
+
+ comp_params
+ pass parameters needed by some components
+
+ create_link
+ write '1' to this attribute to trigger the
+ creation of the link. In case of speculative
+ configuration, the creation is post-poned until
+ a physical device is being attached to the bus.
+
+ destroy_link
+ write '1' to this attribute to destroy an
+ active link
+
+What: /sys/kernel/config/most_sound/<card>
+Date: March 8, 2019
+KernelVersion: 5.2
+Description:
+ The attributes:
+
+ create_card
+ write '1' to this attribute to trigger the
+ registration of the sound card with the ALSA
+ subsystem.
+
+What: /sys/kernel/config/most_sound/<card>/<link>
+Date: March 8, 2019
+KernelVersion: 5.2
+Description:
+ The attributes:
+
+ buffer_size
+ configure the buffer size for this channel
+
+ subbuffer_size
+ configure the sub-buffer size for this channel
+ (needed for synchronous and isochronous data)
+
+
+ num_buffers
+ configure number of buffers used for this
+ channel
+
+ datatype
+ configure type of data that will travel over
+ this channel
+
+ direction
+ configure whether this link will be an input
+ or output
+
+ dbr_size
+ configure DBR data buffer size (this is used
+ for MediaLB communication only)
+
+ packets_per_xact
+ configure the number of packets that will be
+ collected from the network before being
+ transmitted via USB (this is used for USB
+ communication only)
+
+ device
+ name of the device the link is to be attached to
+
+ channel
+ name of the channel the link is to be attached to
+
+ comp_params
+ pass parameters needed by some components
+
+ create_link
+ write '1' to this attribute to trigger the
+ creation of the link. In case of speculative
+ configuration, the creation is post-poned until
+ a physical device is being attached to the bus.
+
+ destroy_link
+ write '1' to this attribute to destroy an
+ active link