LXR linux/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 */
  28static 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
  34static 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
  46static 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
  54static 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 */
  61static 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 */
  68static 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! */
  75static 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!*/
  81static 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
  95