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authorK. Y. Srinivasan <kys@microsoft.com>2016-02-26 15:13:21 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-03-01 16:57:20 -0800
commitd81274aae61c0a045cd0f34191c51fa64ba58bc4 (patch)
tree974d675cc792cf04c456e0d09754e6bc6c4ebbe5 /drivers/hv/vmbus_drv.c
parente66853b09017a788dc384dadce9323396dae3293 (diff)
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Drivers: hv: vmbus: Support handling messages on multiple CPUs
Starting with Windows 2012 R2, message inteerupts can be delivered on any VCPU in the guest. Support this functionality. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/vmbus_drv.c')
-rw-r--r--drivers/hv/vmbus_drv.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 6cd12f108a32..64713ff47e36 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -45,7 +45,6 @@
static struct acpi_device *hv_acpi_dev;
-static struct tasklet_struct msg_dpc;
static struct completion probe_event;
@@ -712,7 +711,7 @@ static void hv_process_timer_expiration(struct hv_message *msg, int cpu)
vmbus_signal_eom(msg);
}
-static void vmbus_on_msg_dpc(unsigned long data)
+void vmbus_on_msg_dpc(unsigned long data)
{
int cpu = smp_processor_id();
void *page_addr = hv_context.synic_message_page[cpu];
@@ -800,7 +799,7 @@ static void vmbus_isr(void)
if (msg->header.message_type == HVMSG_TIMER_EXPIRED)
hv_process_timer_expiration(msg, cpu);
else
- tasklet_schedule(&msg_dpc);
+ tasklet_schedule(hv_context.msg_dpc[cpu]);
}
}
@@ -824,8 +823,6 @@ static int vmbus_bus_init(void)
return ret;
}
- tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0);
-
ret = bus_register(&hv_bus);
if (ret)
goto err_cleanup;
@@ -1321,7 +1318,8 @@ static void __exit vmbus_exit(void)
hv_synic_clockevents_cleanup();
vmbus_disconnect();
hv_remove_vmbus_irq();
- tasklet_kill(&msg_dpc);
+ for_each_online_cpu(cpu)
+ tasklet_kill(hv_context.msg_dpc[cpu]);
vmbus_free_channels();
if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) {
unregister_die_notifier(&hyperv_die_block);