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/******************************************************************************
* hypervisor.h
*
* Linux-specific hypervisor handling.
*
* Copyright (c) 2002, K A Fraser
*
* $FreeBSD$
*/
#ifndef __XEN_HYPERVISOR_H__
#define __XEN_HYPERVISOR_H__
#ifdef XENHVM
#define is_running_on_xen() (HYPERVISOR_shared_info != NULL)
#else
#define is_running_on_xen() 1
#endif
#ifdef PAE
#ifndef CONFIG_X86_PAE
#define CONFIG_X86_PAE
#endif
#endif
#include <sys/cdefs.h>
#include <sys/systm.h>
#include <xen/interface/xen.h>
#include <xen/interface/platform.h>
#include <xen/interface/event_channel.h>
#include <xen/interface/physdev.h>
#include <xen/interface/sched.h>
#include <xen/interface/callback.h>
#include <xen/interface/memory.h>
#include <machine/xen/hypercall.h>
#if defined(__amd64__)
#define MULTI_UVMFLAGS_INDEX 2
#define MULTI_UVMDOMID_INDEX 3
#else
#define MULTI_UVMFLAGS_INDEX 3
#define MULTI_UVMDOMID_INDEX 4
#endif
#ifdef CONFIG_XEN_PRIVILEGED_GUEST
#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
#else
#define is_initial_xendomain() 0
#endif
extern start_info_t *xen_start_info;
extern uint64_t get_system_time(int ticks);
static inline int
HYPERVISOR_console_write(char *str, int count)
{
return HYPERVISOR_console_io(CONSOLEIO_write, count, str);
}
static inline void HYPERVISOR_crash(void) __dead2;
static inline int
HYPERVISOR_yield(void)
{
int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
#if CONFIG_XEN_COMPAT <= 0x030002
if (rc == -ENOXENSYS)
rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
#endif
return (rc);
}
static inline int
HYPERVISOR_block(
void)
{
int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
#if CONFIG_XEN_COMPAT <= 0x030002
if (rc == -ENOXENSYS)
rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
#endif
return (rc);
}
static inline void
HYPERVISOR_shutdown(unsigned int reason)
{
struct sched_shutdown sched_shutdown = {
.reason = reason
};
HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
#if CONFIG_XEN_COMPAT <= 0x030002
HYPERVISOR_sched_op_compat(SCHEDOP_shutdown, reason);
#endif
}
static inline void
HYPERVISOR_crash(void)
{
HYPERVISOR_shutdown(SHUTDOWN_crash);
/* NEVER REACHED */
for (;;) ; /* eliminate noreturn error */
}
/* Transfer control to hypervisor until an event is detected on one */
/* of the specified ports or the specified number of ticks elapse */
static inline int
HYPERVISOR_poll(
evtchn_port_t *ports, unsigned int nr_ports, int ticks)
{
int rc;
struct sched_poll sched_poll = {
.nr_ports = nr_ports,
.timeout = get_system_time(ticks)
};
set_xen_guest_handle(sched_poll.ports, ports);
rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
#if CONFIG_XEN_COMPAT <= 0x030002
if (rc == -ENOXENSYS)
rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
#endif
return (rc);
}
static inline void
MULTI_update_va_mapping(
multicall_entry_t *mcl, unsigned long va,
uint64_t new_val, unsigned long flags)
{
mcl->op = __HYPERVISOR_update_va_mapping;
mcl->args[0] = va;
#if defined(__amd64__)
mcl->args[1] = new_val;
#elif defined(PAE)
mcl->args[1] = (uint32_t)(new_val & 0xffffffff) ;
mcl->args[2] = (uint32_t)(new_val >> 32);
#else
mcl->args[1] = new_val;
mcl->args[2] = 0;
#endif
mcl->args[MULTI_UVMFLAGS_INDEX] = flags;
}
#endif /* __XEN_HYPERVISOR_H__ */
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