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authorK. Y. Srinivasan <kys@microsoft.com>2014-04-08 18:45:54 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-03 19:24:26 -0400
commit3a28fa35d6658703cd26f9c16aaea0eae06afd40 (patch)
treebcc8f07bbd9365e0a270c85af0e50ce3e1682987 /drivers/hv/hv.c
parentd3ba720dd58cdf6630fee4b89482c465d5ad0d0f (diff)
Drivers: hv: vmbus: Implement per-CPU mapping of relid to channel
Currently the mapping of the relID to channel is done under the protection of a single spin lock. Starting with ws2012, each channel is bound to a specific VCPU in the guest. Use this binding to eliminate the spin lock by setting up per-cpu state for mapping relId to the channel. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/hv.c')
-rw-r--r--drivers/hv/hv.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index bcb49502c3bf..edfc8488cb03 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -383,6 +383,8 @@ void hv_synic_init(void *arg)
*/
rdmsrl(HV_X64_MSR_VP_INDEX, vp_index);
hv_context.vp_index[cpu] = (u32)vp_index;
+
+ INIT_LIST_HEAD(&hv_context.percpu_list[cpu]);
return;
}