release/src-rt-6.x.4708/linux/linux-2.6.36/arch/ia64/kvm/vmm.c

   1 /*
   2  * vmm.c: vmm module interface with kvm module
   3  *
   4  * Copyright (c) 2007, Intel Corporation.
   5  *
   6  *  Xiantao Zhang (xiantao.zhang@intel.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms and conditions of the GNU General Public License,
  10  * version 2, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place - Suite 330, Boston, MA 02111-1307 USA.
  20  */
  21
  22
  23 #include<linux/kernel.h>
  24 #include<linux/module.h>
  25 #include<asm/fpswa.h>
  26
  27 #include "vcpu.h"
  28
  29 MODULE_AUTHOR("Intel");
  30 MODULE_LICENSE("GPL");
  31
  32 extern char kvm_ia64_ivt;
  33 extern char kvm_asm_mov_from_ar;
  34 extern char kvm_asm_mov_from_ar_sn2;
  35 extern fpswa_interface_t *vmm_fpswa_interface;
  36
  37 long vmm_sanity = 1;
  38
  39 struct kvm_vmm_info vmm_info = {
  40         .module                 = THIS_MODULE,
  41         .vmm_entry              = vmm_entry,
  42         .tramp_entry            = vmm_trampoline,
  43         .vmm_ivt                = (unsigned long)&kvm_ia64_ivt,
  44         .patch_mov_ar           = (unsigned long)&kvm_asm_mov_from_ar,
  45         .patch_mov_ar_sn2       = (unsigned long)&kvm_asm_mov_from_ar_sn2,
  46 };
  47
  48 static int __init  kvm_vmm_init(void)
  49 {
  50
  51         vmm_fpswa_interface = fpswa_interface;
  52
  53         /*Register vmm data to kvm side*/
  54         return kvm_init(&vmm_info, 1024, 0, THIS_MODULE);
  55 }
  56
  57 static void __exit kvm_vmm_exit(void)
  58 {
  59         kvm_exit();
  60         return ;
  61 }
  62
  63 void vmm_spin_lock(vmm_spinlock_t *lock)
  64 {
  65         _vmm_raw_spin_lock(lock);
  66 }
  67
  68 void vmm_spin_unlock(vmm_spinlock_t *lock)
  69 {
  70         _vmm_raw_spin_unlock(lock);
  71 }
  72
  73 static void vcpu_debug_exit(struct kvm_vcpu *vcpu)
  74 {
  75         struct exit_ctl_data *p = &vcpu->arch.exit_data;
  76         long psr;
  77
  78         local_irq_save(psr);
  79         p->exit_reason = EXIT_REASON_DEBUG;
  80         vmm_transition(vcpu);
  81         local_irq_restore(psr);
  82 }
  83
  84 asmlinkage int printk(const char *fmt, ...)
  85 {
  86         struct kvm_vcpu *vcpu = current_vcpu;
  87         va_list args;
  88         int r;
  89
  90         memset(vcpu->arch.log_buf, 0, VMM_LOG_LEN);
  91         va_start(args, fmt);
  92         r = vsnprintf(vcpu->arch.log_buf, VMM_LOG_LEN, fmt, args);
  93         va_end(args);
  94         vcpu_debug_exit(vcpu);
  95         return r;
  96 }
  97
  98 module_init(kvm_vmm_init)
  99 module_exit(kvm_vmm_exit)