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authorK. Y. Srinivasan <kys@microsoft.com>2016-02-27 02:13:21 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-03-02 03:57:20 +0300
commitd81274aae61c0a045cd0f34191c51fa64ba58bc4 (patch)
tree974d675cc792cf04c456e0d09754e6bc6c4ebbe5 /drivers/hv/hv.c
parente66853b09017a788dc384dadce9323396dae3293 (diff)
downloadlinux-d81274aae61c0a045cd0f34191c51fa64ba58bc4.tar.xz
Drivers: hv: vmbus: Support handling messages on multiple CPUs
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>
Diffstat (limited to 'drivers/hv/hv.c')
-rw-r--r--drivers/hv/hv.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index ccb335f57c88..a1c086ba3b9a 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -204,6 +204,8 @@ int hv_init(void)
sizeof(int) * NR_CPUS);
memset(hv_context.event_dpc, 0,
sizeof(void *) * NR_CPUS);
+ memset(hv_context.msg_dpc, 0,
+ sizeof(void *) * NR_CPUS);
memset(hv_context.clk_evt, 0,
sizeof(void *) * NR_CPUS);
@@ -415,6 +417,13 @@ int hv_synic_alloc(void)
}
tasklet_init(hv_context.event_dpc[cpu], vmbus_on_event, cpu);
+ hv_context.msg_dpc[cpu] = kmalloc(size, GFP_ATOMIC);
+ if (hv_context.msg_dpc[cpu] == NULL) {
+ pr_err("Unable to allocate event dpc\n");
+ goto err;
+ }
+ tasklet_init(hv_context.msg_dpc[cpu], vmbus_on_msg_dpc, cpu);
+
hv_context.clk_evt[cpu] = kzalloc(ced_size, GFP_ATOMIC);
if (hv_context.clk_evt[cpu] == NULL) {
pr_err("Unable to allocate clock event device\n");
@@ -456,6 +465,7 @@ err:
static void hv_synic_free_cpu(int cpu)
{
kfree(hv_context.event_dpc[cpu]);
+ kfree(hv_context.msg_dpc[cpu]);
kfree(hv_context.clk_evt[cpu]);
if (hv_context.synic_event_page[cpu])
free_page((unsigned long)hv_context.synic_event_page[cpu]);