[PATCH 10/15] hyperv: uapi-fy PostMessage and SignalEvent hypercall structures
Roman Kagan
rkagan at virtuozzo.com
Tue Dec 20 15:55:57 UTC 2016
Expose structures used for PostMessage and SignalEvent hypercalls in a
uapi header. While doing so, simplify alignment handling and drop
unnecessary complications in the connectionid field.
Signed-off-by: Roman Kagan <rkagan at virtuozzo.com>
---
arch/x86/include/uapi/asm/hyperv.h | 18 ++++++++++++++++++
drivers/hv/hyperv_vmbus.h | 16 ++--------------
include/linux/hyperv.h | 24 +-----------------------
drivers/hv/channel_mgmt.c | 14 ++++----------
drivers/hv/connection.c | 9 +++------
drivers/hv/hv.c | 2 +-
drivers/hv/vmbus_drv.c | 2 +-
7 files changed, 30 insertions(+), 55 deletions(-)
diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h
index 749fbb25..eb8d42a 100644
--- a/arch/x86/include/uapi/asm/hyperv.h
+++ b/arch/x86/include/uapi/asm/hyperv.h
@@ -378,4 +378,22 @@ struct hv_synic_event_flags_page {
struct hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT];
};
+#define HV_HYPERCALL_PARAM_ALIGN 8
+
+/* Definition of the hv_post_message hypercall input structure. */
+struct hv_input_post_message {
+ __u32 connectionid;
+ __u32 reserved;
+ __u32 message_type;
+ __u32 payload_size;
+ __u64 payload[HV_MESSAGE_PAYLOAD_BYTE_COUNT];
+} __attribute__((aligned(HV_HYPERCALL_PARAM_ALIGN)));
+
+/* Definition of the hv_signal_event hypercall input structure. */
+struct hv_input_signal_event {
+ __u32 connectionid;
+ __u16 flag_number;
+ __u16 rsvdz;
+} __attribute__((aligned(HV_HYPERCALL_PARAM_ALIGN)));
+
#endif
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index ac73832..a96f021 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -104,7 +104,7 @@ union hv_monitor_trigger_group {
};
struct hv_monitor_parameter {
- union hv_connection_id connectionid;
+ u32 connectionid;
u16 flagnumber;
u16 rsvdz;
};
@@ -154,15 +154,6 @@ struct hv_monitor_page {
u8 rsvdz4[1984];
};
-/* Definition of the hv_post_message hypercall input structure. */
-struct hv_input_post_message {
- union hv_connection_id connectionid;
- u32 reserved;
- u32 message_type;
- u32 payload_size;
- u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
-};
-
/*
* Versioning definitions used for guests reporting themselves to the
* hypervisor, and visa versa.
@@ -248,9 +239,6 @@ static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version,
#define HV_CAPS_MAX 8
-#define HV_HYPERCALL_PARAM_ALIGN sizeof(u64)
-
-
/* Service definitions */
#define HV_SERVICE_PARENT_PORT (0)
@@ -351,7 +339,7 @@ extern int hv_init(void);
extern void hv_cleanup(bool crash);
-extern int hv_post_message(union hv_connection_id connection_id,
+extern int hv_post_message(u32 connection_id,
enum hv_message_type message_type,
void *payload, size_t payload_size);
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 42fe43f..e92446e 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -648,27 +648,6 @@ struct vmbus_close_msg {
struct vmbus_channel_close_channel msg;
};
-/* Define connection identifier type. */
-union hv_connection_id {
- u32 asu32;
- struct {
- u32 id:24;
- u32 reserved:8;
- } 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_signal_policy {
HV_SIGNAL_POLICY_DEFAULT = 0,
HV_SIGNAL_POLICY_EXPLICIT,
@@ -755,8 +734,7 @@ struct vmbus_channel {
bool batched_reading;
bool is_dedicated_interrupt;
- struct hv_input_signal_event_buffer sig_buf;
- struct hv_input_signal_event *sig_event;
+ struct hv_input_signal_event sig_event;
/*
* Starting with win8, this field will be used to specify
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 49eaae2..4a5cc11 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -766,20 +766,14 @@ 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.connectionid = VMBUS_EVENT_CONNECTION_ID;
+ newchannel->sig_event.flag_number = 0;
+ newchannel->sig_event.rsvdz = 0;
if (vmbus_proto_version != VERSION_WS2008) {
newchannel->is_dedicated_interrupt =
(offer->is_dedicated_interrupt != 0);
- newchannel->sig_event->connectionid.u.id =
+ newchannel->sig_event.connectionid =
offer->connection_id;
}
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index d38b27f..16ae977 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -418,21 +418,18 @@ void vmbus_on_event(unsigned long data)
*/
int vmbus_post_msg(void *buffer, size_t buflen)
{
- union hv_connection_id conn_id;
int ret = 0;
int retries = 0;
u32 usec = 1;
- conn_id.asu32 = 0;
- conn_id.u.id = VMBUS_MESSAGE_CONNECTION_ID;
-
/*
* hv_post_message() can have transient failures because of
* insufficient resources. Retry the operation a couple of
* times before giving up.
*/
while (retries < 20) {
- ret = hv_post_message(conn_id, HVMSG_VMBUS, buffer, buflen);
+ ret = hv_post_message(VMBUS_MESSAGE_CONNECTION_ID, HVMSG_VMBUS,
+ buffer, buflen);
switch (ret) {
case HV_STATUS_INVALID_CONNECTION_ID:
@@ -472,6 +469,6 @@ void vmbus_set_event(struct vmbus_channel *channel)
set_bit(child_relid,
(unsigned long *)vmbus_connection.send_int_page);
- hv_do_hypercall(HVCALL_SIGNAL_EVENT, channel->sig_event, NULL);
+ hv_do_hypercall(HVCALL_SIGNAL_EVENT, &channel->sig_event, NULL);
}
EXPORT_SYMBOL_GPL(vmbus_set_event);
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 7d2a3d1..b9f50de 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -297,7 +297,7 @@ void hv_cleanup(bool crash)
*
* This involves a hypercall.
*/
-int hv_post_message(union hv_connection_id connection_id,
+int hv_post_message(u32 connection_id,
enum hv_message_type message_type,
void *payload, size_t payload_size)
{
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 7564a7b..f6b626b 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -159,7 +159,7 @@ static u32 channel_conn_id(struct vmbus_channel *channel,
{
u8 monitor_group = channel_monitor_group(channel);
u8 monitor_offset = channel_monitor_offset(channel);
- return monitor_page->parameter[monitor_group][monitor_offset].connectionid.u.id;
+ return monitor_page->parameter[monitor_group][monitor_offset].connectionid;
}
static ssize_t id_show(struct device *dev, struct device_attribute *dev_attr,
--
2.9.3
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