hw/xen: Implement EVTCHNOP_alloc_unbound
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Paul Durrant <paul@xen.org>
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@ -837,6 +837,38 @@ int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi)
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return ret;
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}
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int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc)
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{
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XenEvtchnState *s = xen_evtchn_singleton;
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uint16_t type_val;
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int ret;
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if (!s) {
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return -ENOTSUP;
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}
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if (alloc->dom != DOMID_SELF && alloc->dom != xen_domid) {
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return -ESRCH;
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}
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if (alloc->remote_dom == DOMID_QEMU) {
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type_val = PORT_INFO_TYPEVAL_REMOTE_QEMU;
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} else if (alloc->remote_dom == DOMID_SELF ||
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alloc->remote_dom == xen_domid) {
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type_val = 0;
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} else {
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return -EPERM;
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}
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qemu_mutex_lock(&s->port_lock);
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ret = allocate_port(s, 0, EVTCHNSTAT_unbound, type_val, &alloc->port);
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qemu_mutex_unlock(&s->port_lock);
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return ret;
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}
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int xen_evtchn_send_op(struct evtchn_send *send)
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{
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XenEvtchnState *s = xen_evtchn_singleton;
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@ -21,11 +21,13 @@ struct evtchn_unmask;
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struct evtchn_bind_virq;
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struct evtchn_bind_ipi;
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struct evtchn_send;
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struct evtchn_alloc_unbound;
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int xen_evtchn_status_op(struct evtchn_status *status);
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int xen_evtchn_close_op(struct evtchn_close *close);
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int xen_evtchn_unmask_op(struct evtchn_unmask *unmask);
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int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq);
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int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi);
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int xen_evtchn_send_op(struct evtchn_send *send);
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int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc);
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#endif /* QEMU_XEN_EVTCHN_H */
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@ -921,6 +921,21 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit, X86CPU *cpu,
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err = xen_evtchn_send_op(&send);
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break;
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}
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case EVTCHNOP_alloc_unbound: {
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struct evtchn_alloc_unbound alloc;
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qemu_build_assert(sizeof(alloc) == 8);
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if (kvm_copy_from_gva(cs, arg, &alloc, sizeof(alloc))) {
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err = -EFAULT;
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break;
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}
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err = xen_evtchn_alloc_unbound_op(&alloc);
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if (!err && kvm_copy_to_gva(cs, arg, &alloc, sizeof(alloc))) {
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err = -EFAULT;
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}
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break;
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}
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default:
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return false;
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}
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