release/src-rt-6.x.4708/linux/linux-2.6.36/arch/ia64/kvm/misc.h

   1 #ifndef __KVM_IA64_MISC_H
   2 #define __KVM_IA64_MISC_H
   3
   4 #include <linux/kvm_host.h>
   5 /*
   6  * misc.h
   7  *      Copyright (C) 2007, Intel Corporation.
   8  *      Xiantao Zhang  (xiantao.zhang@intel.com)
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms and conditions of the GNU General Public License,
  12  * version 2, as published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  21  * Place - Suite 330, Boston, MA 02111-1307 USA.
  22  *
  23  */
  24
  25 /*
  26  *Return p2m base address at host side!
  27  */
  28 static inline uint64_t *kvm_host_get_pmt(struct kvm *kvm)
  29 {
  30         return (uint64_t *)(kvm->arch.vm_base +
  31                                 offsetof(struct kvm_vm_data, kvm_p2m));
  32 }
  33
  34 static inline void kvm_set_pmt_entry(struct kvm *kvm, gfn_t gfn,
  35                 u64 paddr, u64 mem_flags)
  36 {
  37         uint64_t *pmt_base = kvm_host_get_pmt(kvm);
  38         unsigned long pte;
  39
  40         pte = PAGE_ALIGN(paddr) | mem_flags;
  41         pmt_base[gfn] = pte;
  42 }
  43
  44 /*Function for translating host address to guest address*/
  45
  46 static inline void *to_guest(struct kvm *kvm, void *addr)
  47 {
  48         return (void *)((unsigned long)(addr) - kvm->arch.vm_base +
  49                         KVM_VM_DATA_BASE);
  50 }
  51
  52 /*Function for translating guest address to host address*/
  53
  54 static inline void *to_host(struct kvm *kvm, void *addr)
  55 {
  56         return (void *)((unsigned long)addr - KVM_VM_DATA_BASE
  57                         + kvm->arch.vm_base);
  58 }
  59
  60 /* Get host context of the vcpu */
  61 static inline union context *kvm_get_host_context(struct kvm_vcpu *vcpu)
  62 {
  63         union context *ctx = &vcpu->arch.host;
  64         return to_guest(vcpu->kvm, ctx);
  65 }
  66
  67 /* Get guest context of the vcpu */
  68 static inline union context *kvm_get_guest_context(struct kvm_vcpu *vcpu)
  69 {
  70         union context *ctx = &vcpu->arch.guest;
  71         return  to_guest(vcpu->kvm, ctx);
  72 }
  73
  74 /* kvm get exit data from gvmm! */
  75 static inline struct exit_ctl_data *kvm_get_exit_data(struct kvm_vcpu *vcpu)
  76 {
  77         return &vcpu->arch.exit_data;
  78 }
  79
  80 /*kvm get vcpu ioreq for kvm module!*/
  81 static inline struct kvm_mmio_req *kvm_get_vcpu_ioreq(struct kvm_vcpu *vcpu)
  82 {
  83         struct exit_ctl_data *p_ctl_data;
  84
  85         if (vcpu) {
  86                 p_ctl_data = kvm_get_exit_data(vcpu);
  87                 if (p_ctl_data->exit_reason == EXIT_REASON_MMIO_INSTRUCTION)
  88                         return &p_ctl_data->u.ioreq;
  89         }
  90
  91         return NULL;
  92 }
  93
  94 #endif