sys/xen/hypervisor.h

   1 /******************************************************************************
   2  * hypervisor.h
   3   *
   4  * Linux-specific hypervisor handling.
   5  *
   6  * Copyright (c) 2002, K A Fraser
   7  *
   8  * $FreeBSD$
   9  */
  10
  11 #ifndef __XEN_HYPERVISOR_H__
  12 #define __XEN_HYPERVISOR_H__
  13
  14 #include <sys/cdefs.h>
  15 #include <sys/systm.h>
  16 #include <xen/interface/xen.h>
  17 #include <xen/interface/platform.h>
  18 #include <xen/interface/event_channel.h>
  19 #include <xen/interface/physdev.h>
  20 #include <xen/interface/sched.h>
  21 #include <xen/interface/callback.h>
  22 #include <xen/interface/memory.h>
  23 #include <machine/xen/hypercall.h>
  24
  25 extern uint64_t get_system_time(int ticks);
  26
  27 static inline int
  28 HYPERVISOR_console_write(const char *str, int count)
  29 {
  30     return HYPERVISOR_console_io(CONSOLEIO_write, count, str);
  31 }
  32
  33 static inline int
  34 HYPERVISOR_yield(void)
  35 {
  36         int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
  37
  38 #if CONFIG_XEN_COMPAT <= 0x030002
  39         if (rc == -ENOXENSYS)
  40                 rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
  41 #endif
  42         return (rc);
  43 }
  44
  45 static inline int
  46 HYPERVISOR_block(
  47         void)
  48 {
  49         int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
  50
  51 #if CONFIG_XEN_COMPAT <= 0x030002
  52         if (rc == -ENOXENSYS)
  53                 rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
  54 #endif
  55         return (rc);
  56 }
  57
  58
  59 static inline void
  60 HYPERVISOR_shutdown(unsigned int reason)
  61 {
  62         struct sched_shutdown sched_shutdown = {
  63                 .reason = reason
  64         };
  65
  66         HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
  67 #if CONFIG_XEN_COMPAT <= 0x030002
  68         HYPERVISOR_sched_op_compat(SCHEDOP_shutdown, reason);
  69 #endif
  70 }
  71
  72 static inline void
  73 HYPERVISOR_crash(void)
  74 {
  75         HYPERVISOR_shutdown(SHUTDOWN_crash);
  76         /* NEVER REACHED */
  77         for (;;) ; /* eliminate noreturn error */
  78 }
  79
  80 /* Transfer control to hypervisor until an event is detected on one */
  81 /* of the specified ports or the specified number of ticks elapse */
  82 static inline int
  83 HYPERVISOR_poll(
  84         evtchn_port_t *ports, unsigned int nr_ports, int ticks)
  85 {
  86         int rc;
  87         struct sched_poll sched_poll = {
  88                 .nr_ports = nr_ports,
  89                 .timeout = get_system_time(ticks)
  90         };
  91         set_xen_guest_handle(sched_poll.ports, ports);
  92
  93         rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
  94 #if CONFIG_XEN_COMPAT <= 0x030002
  95         if (rc == -ENOXENSYS)
  96                 rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
  97 #endif
  98         return (rc);
  99 }
 100
 101 #endif /* __XEN_HYPERVISOR_H__ */