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hw/xen: Implement EVTCHNOP_bind_vcpu 

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2022-12-14 19:27:38 +00:00
parent 8432788104
commit 306670461b
3 changed files with 54 additions and 0 deletions
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40
hw/i386/kvm/xen_evtchn.c
View File

@ -791,6 +791,46 @@ int xen_evtchn_unmask_op(struct evtchn_unmask *unmask)
return ret;
}
int xen_evtchn_bind_vcpu_op(struct evtchn_bind_vcpu *vcpu)
{
XenEvtchnState *s = xen_evtchn_singleton;
XenEvtchnPort *p;
int ret = -EINVAL;
if (!s) {
return -ENOTSUP;
}
if (!valid_port(vcpu->port)) {
return -EINVAL;
}
if (!valid_vcpu(vcpu->vcpu)) {
return -ENOENT;
}
qemu_mutex_lock(&s->port_lock);
p = &s->port_table[vcpu->port];
if (p->type == EVTCHNSTAT_interdomain ||
p->type == EVTCHNSTAT_unbound ||
p->type == EVTCHNSTAT_pirq ||
(p->type == EVTCHNSTAT_virq && virq_is_global(p->type_val))) {
/*
* unmask_port() with do_unmask==false will just raise the event
* on the new vCPU if the port was already pending.
*/
p->vcpu = vcpu->vcpu;
unmask_port(s, vcpu->port, false);
ret = 0;
}
qemu_mutex_unlock(&s->port_lock);
return ret;
}
int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq)
{
XenEvtchnState *s = xen_evtchn_singleton;

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

@ -23,6 +23,7 @@ struct evtchn_bind_ipi;
struct evtchn_send;
struct evtchn_alloc_unbound;
struct evtchn_bind_interdomain;
struct evtchn_bind_vcpu;
int xen_evtchn_status_op(struct evtchn_status *status);
int xen_evtchn_close_op(struct evtchn_close *close);
int xen_evtchn_unmask_op(struct evtchn_unmask *unmask);
@ -31,5 +32,6 @@ int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi);
int xen_evtchn_send_op(struct evtchn_send *send);
int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc);
int xen_evtchn_bind_interdomain_op(struct evtchn_bind_interdomain *interdomain);
int xen_evtchn_bind_vcpu_op(struct evtchn_bind_vcpu *vcpu);
#endif /* QEMU_XEN_EVTCHN_H */

12
target/i386/kvm/xen-emu.c
View File

@ -952,6 +952,18 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit, X86CPU *cpu,
}
break;
}
case EVTCHNOP_bind_vcpu: {
struct evtchn_bind_vcpu vcpu;
qemu_build_assert(sizeof(vcpu) == 8);
if (kvm_copy_from_gva(cs, arg, &vcpu, sizeof(vcpu))) {
err = -EFAULT;
break;
}
err = xen_evtchn_bind_vcpu_op(&vcpu);
break;
}
default:
return false;
}