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