include/asm-x86_64/mach-xen/setup_arch_post.h

   1 /**
   2  * machine_specific_* - Hooks for machine specific setup.
   3  *
   4  * Description:
   5  *      This is included late in kernel/setup.c so that it can make
   6  *      use of all of the static functions.
   7  **/
   8
   9 #include <xen/interface/callback.h>
  10
  11 extern void hypervisor_callback(void);
  12 extern void failsafe_callback(void);
  13 extern void nmi(void);
  14
  15 static void __init machine_specific_arch_setup(void)
  16 {
  17         int ret;
  18         struct callback_register event = {
  19                 .type = CALLBACKTYPE_event,
  20                 .address = (unsigned long) hypervisor_callback,
  21         };
  22         struct callback_register failsafe = {
  23                 .type = CALLBACKTYPE_failsafe,
  24                 .address = (unsigned long)failsafe_callback,
  25         };
  26         struct callback_register syscall = {
  27                 .type = CALLBACKTYPE_syscall,
  28                 .address = (unsigned long)system_call,
  29         };
  30 #ifdef CONFIG_X86_LOCAL_APIC
  31         struct callback_register nmi_cb = {
  32                 .type = CALLBACKTYPE_nmi,
  33                 .address = (unsigned long)nmi,
  34         };
  35 #endif
  36
  37         ret = HYPERVISOR_callback_op(CALLBACKOP_register, &event);
  38         if (ret == 0)
  39                 ret = HYPERVISOR_callback_op(CALLBACKOP_register, &failsafe);
  40         if (ret == 0)
  41                 ret = HYPERVISOR_callback_op(CALLBACKOP_register, &syscall);
  42         if (ret == -ENOSYS)
  43                 ret = HYPERVISOR_set_callbacks(
  44                         event.address,
  45                         failsafe.address,
  46                         syscall.address);
  47         BUG_ON(ret);
  48
  49 #ifdef CONFIG_X86_LOCAL_APIC
  50         ret = HYPERVISOR_callback_op(CALLBACKOP_register, &nmi_cb);
  51         if (ret == -ENOSYS) {
  52                 struct xennmi_callback cb;
  53
  54                 cb.handler_address = nmi_cb.address;
  55                 HYPERVISOR_nmi_op(XENNMI_register_callback, &cb);
  56         }
  57 #endif
  58 }