diff options
| -rw-r--r-- | drivers/hv/connection.c | 26 | ||||
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 27 |
2 files changed, 46 insertions, 7 deletions
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 114050dc8e2..ac71653abb7 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -321,10 +321,32 @@ static void process_chn_event(u32 relid) void vmbus_on_event(unsigned long data) { u32 dword; - u32 maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5; + u32 maxdword; int bit; u32 relid; - u32 *recv_int_page = vmbus_connection.recv_int_page; + u32 *recv_int_page = NULL; + void *page_addr; + int cpu = smp_processor_id(); + union hv_synic_event_flags *event; + + if ((vmbus_proto_version == VERSION_WS2008) || + (vmbus_proto_version == VERSION_WIN7)) { + maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5; + recv_int_page = vmbus_connection.recv_int_page; + } else { + /* + * When the host is win8 and beyond, the event page + * can be directly checked to get the id of the channel + * that has the interrupt pending. + */ + maxdword = HV_EVENT_FLAGS_DWORD_COUNT; + page_addr = hv_context.synic_event_page[cpu]; + event = (union hv_synic_event_flags *)page_addr + + VMBUS_MESSAGE_SINT; + recv_int_page = event->flags32; + } + + /* Check events */ if (!recv_int_page) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 8e1a9ec5300..c583a0403c5 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -460,15 +460,32 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id) * Hyper-V, and the Windows team suggested we do the same. */ - page_addr = hv_context.synic_event_page[cpu]; - event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; + if ((vmbus_proto_version == VERSION_WS2008) || + (vmbus_proto_version == VERSION_WIN7)) { - /* Since we are a child, we only need to check bit 0 */ - if (sync_test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) { + page_addr = hv_context.synic_event_page[cpu]; + event = (union hv_synic_event_flags *)page_addr + + VMBUS_MESSAGE_SINT; + + /* Since we are a child, we only need to check bit 0 */ + if (sync_test_and_clear_bit(0, + (unsigned long *) &event->flags32[0])) { + handled = true; + } + } else { + /* + * Our host is win8 or above. The signaling mechanism + * has changed and we can directly look at the event page. + * If bit n is set then we have an interrup on the channel + * whose id is n. + */ handled = true; - tasklet_schedule(&event_dpc); } + if (handled) + tasklet_schedule(&event_dpc); + + page_addr = hv_context.synic_message_page[cpu]; msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |