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/******************************************************************************
* hypervisor.h
*
* Linux-specific hypervisor handling.
*
* Copyright (c) 2002-2004, K A Fraser
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation; or, when distributed
* separately from the Linux kernel or incorporated into other
* software packages, subject to the following license:
*
* 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.
*/
#ifndef __HYPERVISOR_H__
#define __HYPERVISOR_H__
#ifdef CONFIG_XEN
extern int running_on_xen;
#define is_running_on_xen() (running_on_xen)
#else /* CONFIG_XEN */
# ifdef CONFIG_VMX_GUEST
# define is_running_on_xen() (1)
# else /* CONFIG_VMX_GUEST */
# define is_running_on_xen() (0)
# define HYPERVISOR_ioremap(offset, size) (offset)
# endif /* CONFIG_VMX_GUEST */
#endif /* CONFIG_XEN */
#if defined(CONFIG_XEN) || defined(CONFIG_VMX_GUEST)
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/errno.h>
#include <xen/interface/xen.h>
#include <xen/interface/dom0_ops.h>
#include <xen/interface/event_channel.h>
#include <xen/interface/physdev.h>
#include <xen/interface/sched.h>
#include <asm/hypercall.h>
#include <asm/ptrace.h>
#include <asm/page.h>
extern shared_info_t *HYPERVISOR_shared_info;
extern start_info_t *xen_start_info;
void force_evtchn_callback(void);
#ifndef CONFIG_VMX_GUEST
/* Turn jiffies into Xen system time. XXX Implement me. */
#define jiffies_to_st(j) 0
static inline int
HYPERVISOR_yield(
void)
{
int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
return rc;
}
static inline int
HYPERVISOR_block(
void)
{
int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
return rc;
}
static inline int
HYPERVISOR_shutdown(
unsigned int reason)
{
struct sched_shutdown sched_shutdown = {
.reason = reason
};
int rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
return rc;
}
static inline int
HYPERVISOR_poll(
evtchn_port_t *ports, unsigned int nr_ports, u64 timeout)
{
struct sched_poll sched_poll = {
.nr_ports = nr_ports,
.timeout = jiffies_to_st(timeout)
};
int rc;
set_xen_guest_handle(sched_poll.ports, ports);
rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
return rc;
}
// for drivers/xen/privcmd/privcmd.c
#define machine_to_phys_mapping 0
struct vm_area_struct;
int direct_remap_pfn_range(struct vm_area_struct *vma,
unsigned long address,
unsigned long mfn,
unsigned long size,
pgprot_t prot,
domid_t domid);
struct file;
int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma);
int privcmd_mmap(struct file * file, struct vm_area_struct * vma);
#define HAVE_ARCH_PRIVCMD_MMAP
// for drivers/xen/balloon/balloon.c
#ifdef CONFIG_XEN_SCRUB_PAGES
#define scrub_pages(_p,_n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
#else
#define scrub_pages(_p,_n) ((void)0)
#endif
#define pte_mfn(_x) pte_pfn(_x)
#define phys_to_machine_mapping_valid(_x) (1)
#endif /* !CONFIG_VMX_GUEST */
#define __pte_ma(_x) ((pte_t) {(_x)}) /* unmodified use */
#define pfn_pte_ma(_x,_y) __pte_ma(0) /* unmodified use */
#ifndef CONFIG_VMX_GUEST
int __xen_create_contiguous_region(unsigned long vstart, unsigned int order, unsigned int address_bits);
static inline int
xen_create_contiguous_region(unsigned long vstart,
unsigned int order, unsigned int address_bits)
{
int ret = 0;
if (is_running_on_xen()) {
ret = __xen_create_contiguous_region(vstart, order,
address_bits);
}
return ret;
}
void __xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);
static inline void
xen_destroy_contiguous_region(unsigned long vstart, unsigned int order)
{
if (is_running_on_xen())
__xen_destroy_contiguous_region(vstart, order);
}
#endif /* !CONFIG_VMX_GUEST */
// for netfront.c, netback.c
#define MULTI_UVMFLAGS_INDEX 0 //XXX any value
static inline void
MULTI_update_va_mapping(
multicall_entry_t *mcl, unsigned long va,
pte_t new_val, unsigned long flags)
{
mcl->op = __HYPERVISOR_update_va_mapping;
mcl->result = 0;
}
static inline void
MULTI_grant_table_op(multicall_entry_t *mcl, unsigned int cmd,
void *uop, unsigned int count)
{
mcl->op = __HYPERVISOR_grant_table_op;
mcl->args[0] = cmd;
mcl->args[1] = (unsigned long)uop;
mcl->args[2] = count;
}
/*
* for blktap.c
* int create_lookup_pte_addr(struct mm_struct *mm,
* unsigned long address,
* uint64_t *ptep);
*/
#define create_lookup_pte_addr(mm, address, ptep) \
({ \
printk(KERN_EMERG \
"%s:%d " \
"create_lookup_pte_addr() isn't supported.\n", \
__func__, __LINE__); \
BUG(); \
(-ENOSYS); \
})
// for debug
asmlinkage int xprintk(const char *fmt, ...);
#define xprintd(fmt, ...) xprintk("%s:%d " fmt, __func__, __LINE__, \
##__VA_ARGS__)
#endif /* CONFIG_XEN || CONFIG_VMX_GUEST */
#ifdef CONFIG_XEN_PRIVILEGED_GUEST
#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
#else
#define is_initial_xendomain() 0
#endif
#endif /* __HYPERVISOR_H__ */
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