/*
* Copyright (c) 2006 Manuel Bouyer.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
*
* Communication to/from hypervisor.
*
* Copyright (c) 2002-2004, K A Fraser
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#if __XEN_INTERFACE_VERSION < 0x00030208
/* Undo namespace damage from xen/include/public/io/ring.h
* The proper fix is to get upstream to stop assuming that all OSs use
* mb(), rmb(), wmb().
*/
#undef xen_mb
#undef xen_rmb
#undef xen_wmb
/*
* a placeholder for the start of day information passed up from the hypervisor
*/
union start_info_union
{
start_info_t start_info;
char padding[PAGE_SIZE];
};
extern union start_info_union start_info_union;
#define xen_start_info (start_info_union.start_info)
CTASSERT(sizeof(start_info_t) <= PAGE_SIZE);
extern struct hvm_start_info *hvm_start_info;
/* For use in guest OSes. */
extern volatile shared_info_t *HYPERVISOR_shared_info;
/*
* Does the hypervisor we're running on support an api
* call at the requested version number ?
*/
#define XEN_VERSION_SUPPORTED(major, minor) \
(XEN_MAJOR(xen_version) > (major) || \
(XEN_MAJOR(xen_version) == (major) && \
XEN_MINOR(xen_version) >= (minor)))
/*
* Force a proper event-channel callback from Xen after clearing the
* callback mask. We do this in a very simple manner, by making a call
* down into Xen. The pending flag will be checked by Xen on return.
*/
static __inline void hypervisor_force_callback(void)
{
(void)HYPERVISOR_xen_version(0, (void*)0);
} __attribute__((no_instrument_function)) /* used by mcount */
static __inline void
hypervisor_notify_via_evtchn(unsigned int port)
{
evtchn_op_t op;
