From 7ceb1c37533e2298797188087796dd44931d86af Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Sat, 28 Jul 2018 21:58:48 +0000 Subject: [PATCH] Drivers: hv: vmbus: add numa_node to sysfs Being able to find the numa_node for a device is useful for userspace drivers (DPDK) and also for diagnosing performance issues. This makes vmbus similar to pci. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/stable/sysfs-bus-vmbus | 7 +++++++ drivers/hv/vmbus_drv.c | 17 +++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-bus-vmbus b/Documentation/ABI/stable/sysfs-bus-vmbus index 3eaffbb2d468..3fed8fdb873d 100644 --- a/Documentation/ABI/stable/sysfs-bus-vmbus +++ b/Documentation/ABI/stable/sysfs-bus-vmbus @@ -42,6 +42,13 @@ Contact: K. Y. Srinivasan Description: The 16 bit vendor ID of the device Users: tools/hv/lsvmbus and user level RDMA libraries +What: /sys/bus/vmbus/devices//numa_node +Date: Jul 2018 +KernelVersion: 4.19 +Contact: Stephen Hemminger +Description: This NUMA node to which the VMBUS device is + attached, or -1 if the node is unknown. + What: /sys/bus/vmbus/devices//channels/ Date: September. 2017 KernelVersion: 4.14 diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index db145e1a7049..b1b548a21f91 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -210,6 +210,20 @@ static ssize_t modalias_show(struct device *dev, } static DEVICE_ATTR_RO(modalias); +#ifdef CONFIG_NUMA +static ssize_t numa_node_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hv_device *hv_dev = device_to_hv_device(dev); + + if (!hv_dev->channel) + return -ENODEV; + + return sprintf(buf, "%d\n", hv_dev->channel->numa_node); +} +static DEVICE_ATTR_RO(numa_node); +#endif + static ssize_t server_monitor_pending_show(struct device *dev, struct device_attribute *dev_attr, char *buf) @@ -492,6 +506,9 @@ static struct attribute *vmbus_dev_attrs[] = { &dev_attr_class_id.attr, &dev_attr_device_id.attr, &dev_attr_modalias.attr, +#ifdef CONFIG_NUMA + &dev_attr_numa_node.attr, +#endif &dev_attr_server_monitor_pending.attr, &dev_attr_client_monitor_pending.attr, &dev_attr_server_monitor_latency.attr,