Drivers: hv: Add state to manage incoming channel interrupt load
Add state to bind a channel to a specific VCPU. This will help us better
distribute incoming interrupt load.
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>
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index c6e2c44..8c3cb1f 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -732,8 +732,15 @@
/* GPADL for the channel's ring buffer. */
u32 ringbuffer_gpadlhandle;
- /* GPADL for the channel's server context save area. */
- u32 server_contextarea_gpadlhandle;
+ /*
+ * Starting with win8, this field will be used to specify
+ * the target virtual processor on which to deliver the interrupt for
+ * the host to guest communication.
+ * Prior to win8, incoming channel interrupts would only
+ * be delivered on cpu 0. Setting this value to 0 would
+ * preserve the earlier behavior.
+ */
+ u32 target_vp;
/*
* The upstream ring buffer begins at offset zero in the memory
@@ -971,6 +978,16 @@
bool is_dedicated_interrupt;
struct hv_input_signal_event_buffer sig_buf;
struct hv_input_signal_event *sig_event;
+
+ /*
+ * Starting with win8, this field will be used to specify
+ * the target virtual processor on which to deliver the interrupt for
+ * the host to guest communication.
+ * Prior to win8, incoming channel interrupts would only
+ * be delivered on cpu 0. Setting this value to 0 would
+ * preserve the earlier behavior.
+ */
+ u32 target_vp;
};
static inline void set_channel_read_state(struct vmbus_channel *c, bool state)