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Drivers: hv: vmbus: Support handling messages on multiple CPUs

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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>
This commit is contained in:
K. Y. Srinivasan
2016-02-26 15:13:21 -08:00
committed by Greg Kroah-Hartman
parent e66853b090
commit d81274aae6
3 changed files with 17 additions and 7 deletions
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10
drivers/hv/vmbus_drv.c
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@@ -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);