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Diffstat (limited to 'Documentation/ABI/stable/sysfs-bus-vmbus')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-bus-vmbus | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-bus-vmbus b/Documentation/ABI/stable/sysfs-bus-vmbus new file mode 100644 index 000000000..3066feae1 --- /dev/null +++ b/Documentation/ABI/stable/sysfs-bus-vmbus @@ -0,0 +1,187 @@ +What: /sys/bus/vmbus/hibernation +Date: Jan 2021 +KernelVersion: 5.12 +Contact: Dexuan Cui <decui@microsoft.com> +Description: Whether the host supports hibernation for the VM. +Users: Daemon that sets up swap partition/file for hibernation. + +What: /sys/bus/vmbus/devices/<UUID>/id +Date: Jul 2009 +KernelVersion: 2.6.31 +Contact: K. Y. Srinivasan <kys@microsoft.com> +Description: The VMBus child_relid of the device's primary channel +Users: tools/hv/lsvmbus + +What: /sys/bus/vmbus/devices/<UUID>/class_id +Date: Jul 2009 +KernelVersion: 2.6.31 +Contact: K. Y. Srinivasan <kys@microsoft.com> +Description: The VMBus interface type GUID of the device +Users: tools/hv/lsvmbus + +What: /sys/bus/vmbus/devices/<UUID>/device_id +Date: Jul 2009 +KernelVersion: 2.6.31 +Contact: K. Y. Srinivasan <kys@microsoft.com> +Description: The VMBus interface instance GUID of the device +Users: tools/hv/lsvmbus + +What: /sys/bus/vmbus/devices/<UUID>/channel_vp_mapping +Date: Jul 2015 +KernelVersion: 4.2.0 +Contact: K. Y. Srinivasan <kys@microsoft.com> +Description: The mapping of which primary/sub channels are bound to which + Virtual Processors. + Format: <channel's child_relid:the bound cpu's number> +Users: tools/hv/lsvmbus + +What: /sys/bus/vmbus/devices/<UUID>/device +Date: Dec. 2015 +KernelVersion: 4.5 +Contact: K. Y. Srinivasan <kys@microsoft.com> +Description: The 16 bit device ID of the device +Users: tools/hv/lsvmbus and user level RDMA libraries + +What: /sys/bus/vmbus/devices/<UUID>/vendor +Date: Dec. 2015 +KernelVersion: 4.5 +Contact: K. Y. Srinivasan <kys@microsoft.com> +Description: The 16 bit vendor ID of the device +Users: tools/hv/lsvmbus and user level RDMA libraries + +What: /sys/bus/vmbus/devices/<UUID>/numa_node +Date: Jul 2018 +KernelVersion: 4.19 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: This NUMA node to which the VMBUS device is + attached, or -1 if the node is unknown. + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N> +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Directory for per-channel information + NN is the VMBUS relid associated with the channel. + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/cpu +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: VCPU (sub)channel is affinitized to +Users: tools/hv/lsvmbus and other debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/in_mask +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Host to guest channel interrupt mask +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/latency +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Channel signaling latency. This file is available only for + performance critical channels (storage, network, etc.) that use + the monitor page mechanism. +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/out_mask +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Guest to host channel interrupt mask +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/pending +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Channel interrupt pending state. This file is available only for + performance critical channels (storage, network, etc.) that use + the monitor page mechanism. +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/read_avail +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Bytes available to read +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/write_avail +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Bytes available to write +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/events +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Number of times we have signaled the host +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/interrupts +Date: September. 2017 +KernelVersion: 4.14 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Number of times we have taken an interrupt (incoming) +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/subchannel_id +Date: January. 2018 +KernelVersion: 4.16 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Subchannel ID associated with VMBUS channel +Users: Debugging tools and userspace drivers + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/monitor_id +Date: January. 2018 +KernelVersion: 4.16 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Monitor bit associated with channel. This file is available only + for performance critical channels (storage, network, etc.) that + use the monitor page mechanism. +Users: Debugging tools and userspace drivers + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/ring +Date: January. 2018 +KernelVersion: 4.16 +Contact: Stephen Hemminger <sthemmin@microsoft.com> +Description: Binary file created by uio_hv_generic for ring buffer +Users: Userspace drivers + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/intr_in_full +Date: February 2019 +KernelVersion: 5.0 +Contact: Michael Kelley <mikelley@microsoft.com> +Description: Number of guest to host interrupts caused by the inbound ring + buffer transitioning from full to not full while a packet is + waiting for buffer space to become available +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/intr_out_empty +Date: February 2019 +KernelVersion: 5.0 +Contact: Michael Kelley <mikelley@microsoft.com> +Description: Number of guest to host interrupts caused by the outbound ring + buffer transitioning from empty to not empty +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/out_full_first +Date: February 2019 +KernelVersion: 5.0 +Contact: Michael Kelley <mikelley@microsoft.com> +Description: Number of write operations that were the first to encounter an + outbound ring buffer full condition +Users: Debugging tools + +What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/out_full_total +Date: February 2019 +KernelVersion: 5.0 +Contact: Michael Kelley <mikelley@microsoft.com> +Description: Total number of write operations that encountered an outbound + ring buffer full condition +Users: Debugging tools |