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hyperv: process SIGNAL_EVENT hypercall

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Add handling of SIGNAL_EVENT hypercall.  For that, provide an interface
to associate an EventNotifier with an event connection number, so that
it's signaled when the SIGNAL_EVENT hypercall with the matching
connection ID is called by the guest.

Support for using KVM functionality for this will be added in a followup
patch.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20180921082217.29481-8-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Roman Kagan 2018-09-21 11:22:14 +03:00 • committed by Paolo Bonzini
parent f5642f8b45
commit e6ea9f45b7
4 changed files with 113 additions and 4 deletions
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13
include/hw/hyperv/hyperv.h
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@ -39,6 +39,19 @@ int hyperv_post_msg(HvSintRoute *sint_route, struct hyperv_message *msg);
*/
int hyperv_set_event_flag(HvSintRoute *sint_route, unsigned eventno);
/*
* Associate @notifier with the event connection @conn_id, such that @notifier
* is signaled when the guest executes HV_SIGNAL_EVENT hypercall on @conn_id.
* If @notifier is NULL clear the association.
*/
int hyperv_set_event_flag_handler(uint32_t conn_id, EventNotifier *notifier);
/*
* Process HV_SIGNAL_EVENT hypercall: signal the EventNotifier associated with
* the connection as specified in @param.
*/
uint16_t hyperv_hcall_signal_event(uint64_t param, bool fast);
static inline uint32_t hyperv_vp_index(CPUState *cs)
{
return cs->cpu_index;