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i386/xen: handle PV timer hypercalls

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Introduce support for one shot and periodic mode of Xen PV timers,
whereby timer interrupts come through a special virq event channel
with deadlines being set through:

1) set_timer_op hypercall (only oneshot)
2) vcpu_op hypercall for {set,stop}_{singleshot,periodic}_timer
hypercalls

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
Joao Martins 2018-09-17 07:04:54 -04:00 • committed by David Woodhouse
parent b46f9745b1
commit b746a77926
5 changed files with 308 additions and 2 deletions
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31
hw/i386/kvm/xen_evtchn.c
View file

@ -1222,6 +1222,37 @@ int xen_evtchn_send_op(struct evtchn_send *send)
return ret;
}
int xen_evtchn_set_port(uint16_t port)
{
XenEvtchnState *s = xen_evtchn_singleton;
XenEvtchnPort *p;
int ret = -EINVAL;
if (!s) {
return -ENOTSUP;
}
if (!valid_port(port)) {
return -EINVAL;
}
qemu_mutex_lock(&s->port_lock);
p = &s->port_table[port];
/* QEMU has no business sending to anything but these */
if (p->type == EVTCHNSTAT_virq ||
(p->type == EVTCHNSTAT_interdomain &&
(p->type_val & PORT_INFO_TYPEVAL_REMOTE_QEMU))) {
set_port_pending(s, port);
ret = 0;
}
qemu_mutex_unlock(&s->port_lock);
return ret;
}
EvtchnInfoList *qmp_xen_event_list(Error **errp)
{
XenEvtchnState *s = xen_evtchn_singleton;

2
hw/i386/kvm/xen_evtchn.h
View file

@ -20,6 +20,8 @@ int xen_evtchn_set_callback_param(uint64_t param);
void xen_evtchn_connect_gsis(qemu_irq *system_gsis);
void xen_evtchn_set_callback_level(int level);
int xen_evtchn_set_port(uint16_t port);
struct evtchn_status;
struct evtchn_close;
struct evtchn_unmask;