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140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/******************************************************************************
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* hypervisor.h
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*
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* Linux-specific hypervisor handling.
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*
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* Copyright (c) 2002-2004, K A Fraser
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef __HYPERVISOR_H__
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#define __HYPERVISOR_H__
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/version.h>
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#include <linux/errno.h>
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#include <xen/interface/xen.h>
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#include <xen/interface/dom0_ops.h>
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#include <xen/interface/sched.h>
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#include <asm/ptrace.h>
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#include <asm/page.h>
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#include <asm/xen/privop.h> // for running_on_xen
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extern shared_info_t *HYPERVISOR_shared_info;
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extern start_info_t *xen_start_info;
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void force_evtchn_callback(void);
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int xen_init(void);
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/* Turn jiffies into Xen system time. XXX Implement me. */
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#define jiffies_to_st(j) 0
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#include <asm/hypercall.h>
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static inline int
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HYPERVISOR_yield(
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void)
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{
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int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
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if (rc == -ENOSYS)
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rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
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return rc;
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}
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static inline int
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HYPERVISOR_block(
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void)
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{
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int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
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if (rc == -ENOSYS)
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rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
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return rc;
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}
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static inline int
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HYPERVISOR_shutdown(
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unsigned int reason)
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{
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struct sched_shutdown sched_shutdown = {
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.reason = reason
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};
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int rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
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if (rc == -ENOSYS)
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rc = HYPERVISOR_sched_op_compat(SCHEDOP_shutdown, reason);
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return rc;
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}
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static inline int
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HYPERVISOR_poll(
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evtchn_port_t *ports, unsigned int nr_ports, u64 timeout)
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{
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struct sched_poll sched_poll = {
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.ports = ports,
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.nr_ports = nr_ports,
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.timeout = jiffies_to_st(timeout)
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};
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int rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
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if (rc == -ENOSYS)
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rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
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return rc;
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}
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// for drivers/xen/privcmd/privcmd.c
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#define direct_remap_pfn_range(a,b,c,d,e,f) remap_pfn_range(a,b,c,d,e)
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#define pfn_to_mfn(x) (x)
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#define mfn_to_pfn(x) (x)
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#define machine_to_phys_mapping 0
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// for drivers/xen/balloon/balloon.c
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#ifdef CONFIG_XEN_SCRUB_PAGES
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#define scrub_pages(_p,_n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
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#else
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#define scrub_pages(_p,_n) ((void)0)
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#endif
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#define pte_mfn(_x) pte_pfn(_x)
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#define INVALID_P2M_ENTRY (~0UL)
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#define __pte_ma(_x) ((pte_t) {(_x)})
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#define phys_to_machine_mapping_valid(_x) (1)
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#define kmap_flush_unused() do {} while (0)
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#define set_phys_to_machine(_x,_y) do {} while (0)
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#define xen_machphys_update(_x,_y) do {} while (0)
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#define pfn_pte_ma(_x,_y) __pte_ma(0)
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#endif /* __HYPERVISOR_H__ */
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