diff options
| author | Michael Kelley <mikelley@microsoft.com> | 2022-05-02 09:36:28 -0700 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2022-05-11 17:49:49 +0000 |
| commit | a6b94c6b49198266eaf78095a632df7245ef5196 (patch) | |
| tree | 502165cba7398b06235ad4c4636c552169f90ab1 /drivers/hv/channel_mgmt.c | |
| parent | f1f8288d19d03af9d03db219c23d07a6e8ecd51b (diff) | |
Drivers: hv: vmbus: Remove support for Hyper-V 2008 and Hyper-V 2008R2/Win7
The VMbus driver has special case code for running on the first released
versions of Hyper-V: 2008 and 2008 R2/Windows 7. These versions are now
out of support (except for extended security updates) and lack the
performance features needed for effective production usage of Linux
guests.
Simplify the code by removing the negotiation of the VMbus protocol
versions required for these releases of Hyper-V, and by removing the
special case code for handling these VMbus protocol versions.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Link: https://lore.kernel.org/r/1651509391-2058-2-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/channel_mgmt.c')
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 29 |
1 files changed, 11 insertions, 18 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)); |