72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
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/*
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* QEMU Xen backend support: Operations for true Xen
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*
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* Copyright © 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Authors: David Woodhouse <dwmw2@infradead.org>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/xen/xen_backend_ops.h"
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#include "hw/xen/xen_common.h"
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/*
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* If we have new enough libxenctrl then we do not want/need these compat
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* interfaces, despite what the user supplied cflags might say. They
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* must be undefined before including xenctrl.h
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*/
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#undef XC_WANT_COMPAT_EVTCHN_API
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#include <xenctrl.h>
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/*
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* We don't support Xen prior to 4.2.0.
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*/
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/* Xen 4.2 through 4.6 */
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 40701
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typedef xc_evtchn xenevtchn_handle;
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typedef evtchn_port_or_error_t xenevtchn_port_or_error_t;
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#define xenevtchn_open(l, f) xc_evtchn_open(l, f);
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#define xenevtchn_close(h) xc_evtchn_close(h)
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#define xenevtchn_fd(h) xc_evtchn_fd(h)
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#define xenevtchn_pending(h) xc_evtchn_pending(h)
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#define xenevtchn_notify(h, p) xc_evtchn_notify(h, p)
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#define xenevtchn_bind_interdomain(h, d, p) xc_evtchn_bind_interdomain(h, d, p)
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#define xenevtchn_unmask(h, p) xc_evtchn_unmask(h, p)
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#define xenevtchn_unbind(h, p) xc_evtchn_unbind(h, p)
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#else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40701 */
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#include <xenevtchn.h>
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#endif
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static xenevtchn_handle *libxenevtchn_backend_open(void)
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{
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return xenevtchn_open(NULL, 0);
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}
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struct evtchn_backend_ops libxenevtchn_backend_ops = {
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.open = libxenevtchn_backend_open,
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.close = xenevtchn_close,
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.bind_interdomain = xenevtchn_bind_interdomain,
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.unbind = xenevtchn_unbind,
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.get_fd = xenevtchn_fd,
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.notify = xenevtchn_notify,
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.unmask = xenevtchn_unmask,
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.pending = xenevtchn_pending,
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};
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void setup_xen_backend_ops(void)
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{
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xen_evtchn_ops = &libxenevtchn_backend_ops;
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}
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