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https://github.com/xen-project/xen.git
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David Vrabel
82639998a5
The emacs variable to set the C style from a local variable block is c-file-style, not c-set-style. Signed-off-by: David Vrabel <david.vrabel@citrix.com
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/******************************************************************************
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* xc_evtchn.c
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*
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* API for manipulating and accessing inter-domain event channels.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Copyright (c) 2004, K A Fraser.
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*/
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#include "xc_private.h"
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static int do_evtchn_op(xc_interface *xch, int cmd, void *arg,
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size_t arg_size, int silently_fail)
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{
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int ret = -1;
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DECLARE_HYPERCALL;
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DECLARE_HYPERCALL_BOUNCE(arg, arg_size, XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
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if ( xc_hypercall_bounce_pre(xch, arg) )
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{
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PERROR("do_evtchn_op: bouncing arg failed");
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goto out;
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}
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hypercall.op = __HYPERVISOR_event_channel_op;
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hypercall.arg[0] = cmd;
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hypercall.arg[1] = HYPERCALL_BUFFER_AS_ARG(arg);
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if ((ret = do_xen_hypercall(xch, &hypercall)) < 0 && !silently_fail)
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ERROR("do_evtchn_op: HYPERVISOR_event_channel_op failed: %d", ret);
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xc_hypercall_bounce_post(xch, arg);
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out:
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return ret;
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}
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evtchn_port_or_error_t
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xc_evtchn_alloc_unbound(xc_interface *xch,
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uint32_t dom,
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uint32_t remote_dom)
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{
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int rc;
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struct evtchn_alloc_unbound arg = {
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.dom = (domid_t)dom,
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.remote_dom = (domid_t)remote_dom
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};
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rc = do_evtchn_op(xch, EVTCHNOP_alloc_unbound, &arg, sizeof(arg), 0);
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if ( rc == 0 )
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rc = arg.port;
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return rc;
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}
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int xc_evtchn_reset(xc_interface *xch,
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uint32_t dom)
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{
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struct evtchn_reset arg = { .dom = (domid_t)dom };
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return do_evtchn_op(xch, EVTCHNOP_reset, &arg, sizeof(arg), 0);
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}
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int xc_evtchn_status(xc_interface *xch, xc_evtchn_status_t *status)
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{
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return do_evtchn_op(xch, EVTCHNOP_status, status,
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sizeof(*status), 1);
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}
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int xc_evtchn_fd(xc_evtchn *xce)
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{
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return xce->ops->u.evtchn.fd(xce, xce->ops_handle);
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}
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int xc_evtchn_notify(xc_evtchn *xce, evtchn_port_t port)
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{
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return xce->ops->u.evtchn.notify(xce, xce->ops_handle, port);
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}
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evtchn_port_or_error_t
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xc_evtchn_bind_unbound_port(xc_evtchn *xce, int domid)
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{
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return xce->ops->u.evtchn.bind_unbound_port(xce, xce->ops_handle, domid);
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}
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evtchn_port_or_error_t
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xc_evtchn_bind_interdomain(xc_evtchn *xce, int domid,
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evtchn_port_t remote_port)
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{
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return xce->ops->u.evtchn.bind_interdomain(xce, xce->ops_handle, domid, remote_port);
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}
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evtchn_port_or_error_t
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xc_evtchn_bind_virq(xc_evtchn *xce, unsigned int virq)
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{
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return xce->ops->u.evtchn.bind_virq(xce, xce->ops_handle, virq);
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}
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int xc_evtchn_unbind(xc_evtchn *xce, evtchn_port_t port)
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{
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return xce->ops->u.evtchn.unbind(xce, xce->ops_handle, port);
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}
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evtchn_port_or_error_t
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xc_evtchn_pending(xc_evtchn *xce)
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{
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return xce->ops->u.evtchn.pending(xce, xce->ops_handle);
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}
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int xc_evtchn_unmask(xc_evtchn *xce, evtchn_port_t port)
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{
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return xce->ops->u.evtchn.unmask(xce, xce->ops_handle, port);
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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