diff options
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 29 | ||||
| -rw-r--r-- | drivers/hv/connection.c | 6 | ||||
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 60 | ||||
| -rw-r--r-- | include/linux/hyperv.h | 10 |
4 files changed, 33 insertions, 72 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 0db1b775e013..97d8f5646778 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -714,15 +714,13 @@ static bool hv_cpuself_used(u32 cpu, struct vmbus_channel *chn) static int next_numa_node_id; /* - * Starting with Win8, we can statically distribute the incoming - * channel interrupt load by binding a channel to VCPU. + * We can statically distribute the incoming channel interrupt load + * by binding a channel to VCPU. * - * For pre-win8 hosts or non-performance critical channels we assign the - * VMBUS_CONNECT_CPU. - * - * Starting with win8, performance critical channels will be distributed - * evenly among all the available NUMA nodes. Once the node is assigned, - * we will assign the CPU based on a simple round robin scheme. + * For non-performance critical channels we assign the VMBUS_CONNECT_CPU. + * Performance critical channels will be distributed evenly among all + * the available NUMA nodes. Once the node is assigned, we will assign + * the CPU based on a simple round robin scheme. */ static void init_vp_index(struct vmbus_channel *channel) { @@ -733,13 +731,10 @@ static void init_vp_index(struct vmbus_channel *channel) u32 target_cpu; int numa_node; - if ((vmbus_proto_version == VERSION_WS2008) || - (vmbus_proto_version == VERSION_WIN7) || (!perf_chn) || + if (!perf_chn || !alloc_cpumask_var(&available_mask, GFP_KERNEL)) { /* - * Prior to win8, all channel interrupts are - * delivered on VMBUS_CONNECT_CPU. - * Also if the channel is not a performance critical + * If the channel is not a performance critical * channel, bind it to VMBUS_CONNECT_CPU. * In case alloc_cpumask_var() fails, bind it to * VMBUS_CONNECT_CPU. @@ -932,11 +927,9 @@ static void vmbus_setup_channel_state(struct vmbus_channel *channel, */ channel->sig_event = VMBUS_EVENT_CONNECTION_ID; - if (vmbus_proto_version != VERSION_WS2008) { - channel->is_dedicated_interrupt = - (offer->is_dedicated_interrupt != 0); - channel->sig_event = offer->connection_id; - } + channel->is_dedicated_interrupt = + (offer->is_dedicated_interrupt != 0); + channel->sig_event = offer->connection_id; memcpy(&channel->offermsg, offer, sizeof(struct vmbus_channel_offer_channel)); diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index a3d8be8d6cfb..6218bbf6863a 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -47,6 +47,8 @@ EXPORT_SYMBOL_GPL(vmbus_proto_version); /* * Table of VMBus versions listed from newest to oldest. + * VERSION_WIN7 and VERSION_WS2008 are no longer supported in + * Linux guests and are not listed. */ static __u32 vmbus_versions[] = { VERSION_WIN10_V5_3, @@ -56,9 +58,7 @@ static __u32 vmbus_versions[] = { VERSION_WIN10_V4_1, VERSION_WIN10, VERSION_WIN8_1, - VERSION_WIN8, - VERSION_WIN7, - VERSION_WS2008 + VERSION_WIN8 }; /* diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 14de17087864..9c1b3620775c 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1263,23 +1263,17 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu) unsigned long *recv_int_page; u32 maxbits, relid; - if (vmbus_proto_version < VERSION_WIN8) { - maxbits = MAX_NUM_CHANNELS_SUPPORTED; - 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. - */ - void *page_addr = hv_cpu->synic_event_page; - union hv_synic_event_flags *event - = (union hv_synic_event_flags *)page_addr + - VMBUS_MESSAGE_SINT; + /* + * The event page can be directly checked to get the id of + * the channel that has the interrupt pending. + */ + void *page_addr = hv_cpu->synic_event_page; + union hv_synic_event_flags *event + = (union hv_synic_event_flags *)page_addr + + VMBUS_MESSAGE_SINT; - maxbits = HV_EVENT_FLAGS_COUNT; - recv_int_page = event->flags; - } + maxbits = HV_EVENT_FLAGS_COUNT; + recv_int_page = event->flags; if (unlikely(!recv_int_page)) return; @@ -1351,40 +1345,10 @@ static void vmbus_isr(void) { struct hv_per_cpu_context *hv_cpu = this_cpu_ptr(hv_context.cpu_context); - void *page_addr = hv_cpu->synic_event_page; + void *page_addr; struct hv_message *msg; - union hv_synic_event_flags *event; - bool handled = false; - - if (unlikely(page_addr == NULL)) - return; - - event = (union hv_synic_event_flags *)page_addr + - VMBUS_MESSAGE_SINT; - /* - * Check for events before checking for messages. This is the order - * in which events and messages are checked in Windows guests on - * Hyper-V, and the Windows team suggested we do the same. - */ - - 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, event->flags)) - 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; - } - if (handled) - vmbus_chan_sched(hv_cpu); + vmbus_chan_sched(hv_cpu); page_addr = hv_cpu->synic_message_page; msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index c440c45887c2..a2464295c14a 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -230,15 +230,19 @@ static inline u32 hv_get_avail_to_write_percent( * two 16 bit quantities: major_number. minor_number. * * 0 . 13 (Windows Server 2008) - * 1 . 1 (Windows 7) - * 2 . 4 (Windows 8) - * 3 . 0 (Windows 8 R2) + * 1 . 1 (Windows 7, WS2008 R2) + * 2 . 4 (Windows 8, WS2012) + * 3 . 0 (Windows 8.1, WS2012 R2) * 4 . 0 (Windows 10) * 4 . 1 (Windows 10 RS3) * 5 . 0 (Newer Windows 10) * 5 . 1 (Windows 10 RS4) * 5 . 2 (Windows Server 2019, RS5) * 5 . 3 (Windows Server 2022) + * + * The WS2008 and WIN7 versions are listed here for + * completeness but are no longer supported in the + * Linux kernel. */ #define VERSION_WS2008 ((0 << 16) | (13)) |