1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2013 Anish Gupta ([email protected])
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
12 * disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #ifndef _SVM_SOFTC_H_
32 #define _SVM_SOFTC_H_
33
34 #include "x86.h"
35
36 #define SVM_IO_BITMAP_SIZE (3 * PAGE_SIZE)
37 #define SVM_MSR_BITMAP_SIZE (2 * PAGE_SIZE)
38
39 struct asid {
40 uint64_t gen; /* range is [1, ~0UL] */
41 uint32_t num; /* range is [1, nasid - 1] */
42 };
43
44 /*
45 * XXX separate out 'struct vmcb' from 'svm_vcpu' to avoid wasting space
46 * due to VMCB alignment requirements.
47 */
48 struct svm_vcpu {
49 struct vmcb vmcb; /* hardware saved vcpu context */
50 struct svm_regctx swctx; /* software saved vcpu context */
51 uint64_t vmcb_pa; /* VMCB physical address */
52 uint64_t nextrip; /* next instruction to be executed by guest */
53 int lastcpu; /* host cpu that the vcpu last ran on */
54 uint32_t dirty; /* state cache bits that must be cleared */
55 long eptgen; /* pmap->pm_eptgen when the vcpu last ran */
56 struct asid asid;
57 } __aligned(PAGE_SIZE);
58
59 /*
60 * SVM softc, one per virtual machine.
61 */
62 struct svm_softc {
63 uint8_t apic_page[VM_MAXCPU][PAGE_SIZE];
64 struct svm_vcpu vcpu[VM_MAXCPU];
65 vm_offset_t nptp; /* nested page table */
66 uint8_t *iopm_bitmap; /* shared by all vcpus */
67 uint8_t *msr_bitmap; /* shared by all vcpus */
68 struct vm *vm;
69 struct vm_mtrr mtrr[VM_MAXCPU];
70 };
71
72 CTASSERT((offsetof(struct svm_softc, nptp) & PAGE_MASK) == 0);
73
74 static __inline struct svm_vcpu *
svm_get_vcpu(struct svm_softc * sc,int vcpu)75 svm_get_vcpu(struct svm_softc *sc, int vcpu)
76 {
77
78 return (&(sc->vcpu[vcpu]));
79 }
80
81 static __inline struct vmcb *
svm_get_vmcb(struct svm_softc * sc,int vcpu)82 svm_get_vmcb(struct svm_softc *sc, int vcpu)
83 {
84
85 return (&(sc->vcpu[vcpu].vmcb));
86 }
87
88 static __inline struct vmcb_state *
svm_get_vmcb_state(struct svm_softc * sc,int vcpu)89 svm_get_vmcb_state(struct svm_softc *sc, int vcpu)
90 {
91
92 return (&(sc->vcpu[vcpu].vmcb.state));
93 }
94
95 static __inline struct vmcb_ctrl *
svm_get_vmcb_ctrl(struct svm_softc * sc,int vcpu)96 svm_get_vmcb_ctrl(struct svm_softc *sc, int vcpu)
97 {
98
99 return (&(sc->vcpu[vcpu].vmcb.ctrl));
100 }
101
102 static __inline struct svm_regctx *
svm_get_guest_regctx(struct svm_softc * sc,int vcpu)103 svm_get_guest_regctx(struct svm_softc *sc, int vcpu)
104 {
105
106 return (&(sc->vcpu[vcpu].swctx));
107 }
108
109 static __inline void
svm_set_dirty(struct svm_softc * sc,int vcpu,uint32_t dirtybits)110 svm_set_dirty(struct svm_softc *sc, int vcpu, uint32_t dirtybits)
111 {
112 struct svm_vcpu *vcpustate;
113
114 vcpustate = svm_get_vcpu(sc, vcpu);
115
116 vcpustate->dirty |= dirtybits;
117 }
118
119 #endif /* _SVM_SOFTC_H_ */
120