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224 lines
6.2 KiB
C
224 lines
6.2 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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#ifdef CONFIG_XEN
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extern int running_on_xen;
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#define is_running_on_xen() (running_on_xen)
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#else /* CONFIG_XEN */
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# ifdef CONFIG_VMX_GUEST
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# define is_running_on_xen() (1)
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# else /* CONFIG_VMX_GUEST */
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# define is_running_on_xen() (0)
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# define HYPERVISOR_ioremap(offset, size) (offset)
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# endif /* CONFIG_VMX_GUEST */
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#endif /* CONFIG_XEN */
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#if defined(CONFIG_XEN) || defined(CONFIG_VMX_GUEST)
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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/event_channel.h>
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#include <xen/interface/physdev.h>
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#include <xen/interface/sched.h>
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#include <asm/hypercall.h>
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#include <asm/ptrace.h>
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#include <asm/page.h>
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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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#ifndef CONFIG_VMX_GUEST
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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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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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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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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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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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.nr_ports = nr_ports,
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.timeout = jiffies_to_st(timeout)
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};
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int rc;
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set_xen_guest_handle(sched_poll.ports, ports);
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rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
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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 machine_to_phys_mapping 0
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struct vm_area_struct;
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int direct_remap_pfn_range(struct vm_area_struct *vma,
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unsigned long address,
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unsigned long mfn,
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unsigned long size,
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pgprot_t prot,
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domid_t domid);
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struct file;
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int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma);
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int privcmd_mmap(struct file * file, struct vm_area_struct * vma);
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#define HAVE_ARCH_PRIVCMD_MMAP
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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 phys_to_machine_mapping_valid(_x) (1)
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#endif /* !CONFIG_VMX_GUEST */
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#define __pte_ma(_x) ((pte_t) {(_x)}) /* unmodified use */
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#define pfn_pte_ma(_x,_y) __pte_ma(0) /* unmodified use */
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#ifndef CONFIG_VMX_GUEST
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int __xen_create_contiguous_region(unsigned long vstart, unsigned int order, unsigned int address_bits);
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static inline int
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xen_create_contiguous_region(unsigned long vstart,
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unsigned int order, unsigned int address_bits)
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{
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int ret = 0;
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if (is_running_on_xen()) {
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ret = __xen_create_contiguous_region(vstart, order,
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address_bits);
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}
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return ret;
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}
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void __xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);
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static inline void
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xen_destroy_contiguous_region(unsigned long vstart, unsigned int order)
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{
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if (is_running_on_xen())
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__xen_destroy_contiguous_region(vstart, order);
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}
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#endif /* !CONFIG_VMX_GUEST */
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// for netfront.c, netback.c
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#define MULTI_UVMFLAGS_INDEX 0 //XXX any value
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static inline void
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MULTI_update_va_mapping(
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multicall_entry_t *mcl, unsigned long va,
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pte_t new_val, unsigned long flags)
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{
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mcl->op = __HYPERVISOR_update_va_mapping;
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mcl->result = 0;
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}
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static inline void
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MULTI_grant_table_op(multicall_entry_t *mcl, unsigned int cmd,
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void *uop, unsigned int count)
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{
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mcl->op = __HYPERVISOR_grant_table_op;
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mcl->args[0] = cmd;
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mcl->args[1] = (unsigned long)uop;
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mcl->args[2] = count;
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}
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/*
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* for blktap.c
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* int create_lookup_pte_addr(struct mm_struct *mm,
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* unsigned long address,
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* uint64_t *ptep);
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*/
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#define create_lookup_pte_addr(mm, address, ptep) \
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({ \
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printk(KERN_EMERG \
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"%s:%d " \
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"create_lookup_pte_addr() isn't supported.\n", \
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__func__, __LINE__); \
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BUG(); \
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(-ENOSYS); \
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})
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// for debug
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asmlinkage int xprintk(const char *fmt, ...);
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#define xprintd(fmt, ...) xprintk("%s:%d " fmt, __func__, __LINE__, \
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##__VA_ARGS__)
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#endif /* CONFIG_XEN || CONFIG_VMX_GUEST */
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#ifdef CONFIG_XEN_PRIVILEGED_GUEST
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#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
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#else
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#define is_initial_xendomain() 0
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#endif
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#endif /* __HYPERVISOR_H__ */
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