1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2013 Anish Gupta (akgupt3@gmail.com)
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
29 #ifndef _SVM_SOFTC_H_
30 #define _SVM_SOFTC_H_
31
32 #define SVM_IO_BITMAP_SIZE (3 * PAGE_SIZE)
33 #define SVM_MSR_BITMAP_SIZE (2 * PAGE_SIZE)
34
35 #include <sys/hma.h>
36
37 #include "vmcb.h"
38 #include "svm_pmu.h"
39
40 /* This must match HOST_MSR_NUM in svm_msr.c (where it is CTASSERTed) */
41 #define SVM_HOST_MSR_NUM 4
42
43 /*
44 * XXX separate out 'struct vmcb' from 'svm_vcpu' to avoid wasting space
45 * due to VMCB alignment requirements.
46 */
47 struct svm_vcpu {
48 struct vmcb vmcb; /* hardware saved vcpu context */
49 struct svm_regctx swctx; /* software saved vcpu context */
50 uint64_t vmcb_pa; /* VMCB physical address */
51 uint64_t nextrip; /* next instruction to be executed by guest */
52 int lastcpu; /* host cpu that the vcpu last ran on */
53 uint32_t dirty; /* state cache bits that must be cleared */
54 uint64_t nptgen; /* page table gen when the vcpu last ran */
55 hma_svm_asid_t hma_asid;
56 boolean_t loaded;
57 struct svm_pmu_vcpu pmu;
58 } __aligned(PAGE_SIZE);
59
60 /*
61 * SVM softc, one per virtual machine.
62 */
63 struct svm_softc {
64 uint8_t apic_page[VM_MAXCPU][PAGE_SIZE];
65 struct svm_vcpu vcpu[VM_MAXCPU];
66 uint64_t nptp; /* nested page table (host PA) */
67 uint8_t *iopm_bitmap; /* shared by all vcpus */
68 uint8_t *msr_bitmap; /* shared by all vcpus */
69 struct vm *vm;
70 uint64_t host_msrs[VM_MAXCPU][SVM_HOST_MSR_NUM];
71 svm_pmu_flavor_t pmu_flavor;
72 };
73
74 /*
75 * Since the VMCB must be page-aligned, and is the first member of svm_vcpu,
76 * which is slated to be page-aligned, this is a belt-and-suspenders check to
77 * see that such alignment instructions are being heeded.
78 */
79 CTASSERT((offsetof(struct svm_softc, nptp) & PAGE_MASK) == 0);
80
81 static __inline struct svm_vcpu *
svm_get_vcpu(struct svm_softc * sc,int vcpu)82 svm_get_vcpu(struct svm_softc *sc, int vcpu)
83 {
84 return (&(sc->vcpu[vcpu]));
85 }
86
87 static __inline struct vmcb *
svm_get_vmcb(struct svm_softc * sc,int vcpu)88 svm_get_vmcb(struct svm_softc *sc, int vcpu)
89 {
90 return (&(sc->vcpu[vcpu].vmcb));
91 }
92
93 static __inline struct vmcb_state *
svm_get_vmcb_state(struct svm_softc * sc,int vcpu)94 svm_get_vmcb_state(struct svm_softc *sc, int vcpu)
95 {
96 return (&(sc->vcpu[vcpu].vmcb.state));
97 }
98
99 static __inline struct vmcb_ctrl *
svm_get_vmcb_ctrl(struct svm_softc * sc,int vcpu)100 svm_get_vmcb_ctrl(struct svm_softc *sc, int vcpu)
101 {
102 return (&(sc->vcpu[vcpu].vmcb.ctrl));
103 }
104
105 static __inline struct svm_regctx *
svm_get_guest_regctx(struct svm_softc * sc,int vcpu)106 svm_get_guest_regctx(struct svm_softc *sc, int vcpu)
107 {
108 return (&(sc->vcpu[vcpu].swctx));
109 }
110
111 static __inline struct svm_pmu_vcpu *
svm_get_pmu(struct svm_softc * sc,int vcpu)112 svm_get_pmu(struct svm_softc *sc, int vcpu)
113 {
114 return (&(sc->vcpu[vcpu].pmu));
115 }
116
117 static __inline void
svm_set_dirty(struct svm_softc * sc,int vcpu,uint32_t dirtybits)118 svm_set_dirty(struct svm_softc *sc, int vcpu, uint32_t dirtybits)
119 {
120 struct svm_vcpu *vcpustate = svm_get_vcpu(sc, vcpu);
121
122 vcpustate->dirty |= dirtybits;
123 }
124
125 static __inline void
svm_apply_dirty(struct svm_softc * sc,int vcpu)126 svm_apply_dirty(struct svm_softc *sc, int vcpu)
127 {
128 struct svm_vcpu *vcpustate = svm_get_vcpu(sc, vcpu);
129 struct vmcb_ctrl *ctrl = svm_get_vmcb_ctrl(sc, vcpu);
130
131 ctrl->vmcb_clean = ~vcpustate->dirty;
132 vcpustate->dirty = 0;
133 }
134
135 int svm_get_intercept(struct svm_softc *, int, int, uint32_t);
136 void svm_set_intercept(struct svm_softc *, int, int, uint32_t, int);
137
138 static __inline void
svm_disable_intercept(struct svm_softc * sc,int vcpu,int off,uint32_t bitmask)139 svm_disable_intercept(struct svm_softc *sc, int vcpu, int off, uint32_t bitmask)
140 {
141 svm_set_intercept(sc, vcpu, off, bitmask, 0);
142 }
143
144 static __inline void
svm_enable_intercept(struct svm_softc * sc,int vcpu,int off,uint32_t bitmask)145 svm_enable_intercept(struct svm_softc *sc, int vcpu, int off, uint32_t bitmask)
146 {
147 svm_set_intercept(sc, vcpu, off, bitmask, 1);
148 }
149
150 #endif /* _SVM_SOFTC_H_ */
151