Root/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

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