drivers: hv: vmbus: Introduce latency testing
Introduce user specified latency in the packet reception path
By exposing the test parameters as part of the debugfs channel
attributes. We will control the testing state via these attributes.
Signed-off-by: Branden Bonaby <brandonbonaby94@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 0ac874f..1259918 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -960,6 +960,8 @@ static void vmbus_device_release(struct device *device)
struct hv_device *hv_dev = device_to_hv_device(device);
struct vmbus_channel *channel = hv_dev->channel;
+ hv_debug_rm_dev_dir(hv_dev);
+
mutex_lock(&vmbus_connection.channel_mutex);
hv_process_channel_removal(channel);
mutex_unlock(&vmbus_connection.channel_mutex);
@@ -1814,6 +1816,7 @@ int vmbus_device_register(struct hv_device *child_device_obj)
pr_err("Unable to register primary channeln");
goto err_kset_unregister;
}
+ hv_debug_add_dev_dir(child_device_obj);
return 0;
@@ -2374,6 +2377,7 @@ static int __init hv_acpi_init(void)
ret = -ETIMEDOUT;
goto cleanup;
}
+ hv_debug_init();
ret = vmbus_bus_init();
if (ret)
@@ -2410,6 +2414,8 @@ static void __exit vmbus_exit(void)
tasklet_kill(&hv_cpu->msg_dpc);
}
+ hv_debug_rm_all_dir();
+
vmbus_free_channels();
if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) {