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misc.h
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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 ([email protected])
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 +
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