We need to pass only 8 bytes of input for HvSignalEvent which makes it a
perfect fit for fast hypercall. hv_input_signal_event_buffer is not needed
any more and hv_input_signal_event is converted to union for convenience.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Reviewed-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>
---
drivers/hv/channel_mgmt.c | 13 ++-----------
drivers/hv/connection.c | 2 +-
include/linux/hyperv.h | 15 +--------------
3 files changed, 4 insertions(+), 26 deletions(-)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 4bbb8dea4727..fd2b6c67f781 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -805,21 +805,12 @@ static void vmbus_onoffer(struct vmbus_channel_message_header *hdr)
/*
* Setup state for signalling the host.
*/
- newchannel->sig_event = (struct hv_input_signal_event *)
- (ALIGN((unsigned long)
- &newchannel->sig_buf,
- HV_HYPERCALL_PARAM_ALIGN));
-
- newchannel->sig_event->connectionid.asu32 = 0;
- newchannel->sig_event->connectionid.u.id = VMBUS_EVENT_CONNECTION_ID;
- newchannel->sig_event->flag_number = 0;
- newchannel->sig_event->rsvdz = 0;
+ newchannel->sig_event = VMBUS_EVENT_CONNECTION_ID;
if (vmbus_proto_version != VERSION_WS2008) {
newchannel->is_dedicated_interrupt =
(offer->is_dedicated_interrupt != 0);
- newchannel->sig_event->connectionid.u.id =
- offer->connection_id;
+ newchannel->sig_event = offer->connection_id;
}
memcpy(&newchannel->offermsg, offer,
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 45e806e3112f..37ecf514189e 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -408,6 +408,6 @@ void vmbus_set_event(struct vmbus_channel *channel)
if (!channel->is_dedicated_interrupt)
vmbus_send_interrupt(child_relid);
- hv_do_hypercall(HVCALL_SIGNAL_EVENT, channel->sig_event, NULL);
+ hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event);
}
EXPORT_SYMBOL_GPL(vmbus_set_event);
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 6608a71e7d79..c472bd43bdd7 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -677,18 +677,6 @@ union hv_connection_id {
} u;
};
-/* Definition of the hv_signal_event hypercall input structure. */
-struct hv_input_signal_event {
- union hv_connection_id connectionid;
- u16 flag_number;
- u16 rsvdz;
-};
-
-struct hv_input_signal_event_buffer {
- u64 align8;
- struct hv_input_signal_event event;
-};
-
enum hv_numa_policy {
HV_BALANCED = 0,
HV_LOCALIZED,
@@ -770,8 +758,7 @@ struct vmbus_channel {
} callback_mode;
bool is_dedicated_interrupt;
- struct hv_input_signal_event_buffer sig_buf;
- struct hv_input_signal_event *sig_event;
+ u64 sig_event;
/*
* Starting with win8, this field will be used to specify
--
2.13.3
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