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Drivers: hv: Manage signaling state on a per-connection basis 

The current code has a global handle for supporting signaling of the host
from guest. Make this a per-channel attribute as on some versions of the
host we can signal on per-channel handle.

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>
This commit is contained in:
K. Y. Srinivasan 2012-12-01 06:46:45 -08:00 committed by Greg Kroah-Hartman
parent eafa7072e7
commit b3bf60c7b4
3 changed files with 45 additions and 21 deletions
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20
drivers/hv/channel_mgmt.c
View File

@ -282,6 +282,26 @@ static void vmbus_onoffer(struct vmbus_channel_message_header *hdr)
*/
newchannel->batched_reading = true;
/*
* 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;
if (vmbus_proto_version != VERSION_WS2008) {
newchannel->is_dedicated_interrupt =
(offer->is_dedicated_interrupt != 0);
newchannel->sig_event->connectionid.u.id =
offer->connection_id;
}
memcpy(&newchannel->offermsg, offer,
sizeof(struct vmbus_channel_offer_channel));
newchannel->monitor_grp = (u8)offer->monitorid / 32;

21
drivers/hv/hyperv_vmbus.h
View File

@ -101,15 +101,6 @@ enum hv_message_type {
/* Define invalid partition identifier. */
#define HV_PARTITION_ID_INVALID ((u64)0x0)
/* Define connection identifier type. */
union hv_connection_id {
u32 asu32;
struct {
u32 id:24;
u32 reserved:8;
} u;
};
/* Define port identifier type. */
union hv_port_id {
u32 asu32;
@ -338,13 +329,6 @@ struct hv_input_post_message {
u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
};
/* Definition of the hv_signal_event hypercall input structure. */
struct hv_input_signal_event {
union hv_connection_id connectionid;
u16 flag_number;
u16 rsvdz;
};
/*
* Versioning definitions used for guests reporting themselves to the
* hypervisor, and visa versa.
@ -498,11 +482,6 @@ static const uuid_le VMBUS_SERVICE_ID = {
struct hv_input_signal_event_buffer {
u64 align8;
struct hv_input_signal_event event;
};
struct hv_context {
/* We only support running on top of Hyper-V
* So at this point this really can only contain the Hyper-V ID

25
include/linux/hyperv.h
View File

@ -897,6 +897,27 @@ 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;
};
struct vmbus_channel {
struct list_head listentry;
@ -946,6 +967,10 @@ 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;
};
static inline void set_channel_read_state(struct vmbus_channel *c, bool state)