xref: /illumos-gate/usr/src/uts/intel/io/vmm/amd/vmcb.c (revision dd72704bd9e794056c558153663c739e2012d721)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 /*
30  * This file and its contents are supplied under the terms of the
31  * Common Development and Distribution License ("CDDL"), version 1.0.
32  * You may only use this file in accordance with the terms of version
33  * 1.0 of the CDDL.
34  *
35  * A full copy of the text of the CDDL should have accompanied this
36  * source.  A copy of the CDDL is also available via the Internet at
37  * http://www.illumos.org/license/CDDL.
38  *
39  * Copyright 2020 Oxide Computer Company
40  */
41 
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
44 
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 
48 #include <machine/specialreg.h>
49 #include <machine/vmm.h>
50 
51 #include "vmcb.h"
52 #include "svm.h"
53 
54 struct vmcb_segment *
55 vmcb_segptr(struct vmcb *vmcb, int type)
56 {
57 	struct vmcb_state *state = &vmcb->state;
58 
59 	switch (type) {
60 	case VM_REG_GUEST_CS:
61 		return (&state->cs);
62 	case VM_REG_GUEST_DS:
63 		return (&state->ds);
64 	case VM_REG_GUEST_ES:
65 		return (&state->es);
66 	case VM_REG_GUEST_FS:
67 		return (&state->fs);
68 	case VM_REG_GUEST_GS:
69 		return (&state->gs);
70 	case VM_REG_GUEST_SS:
71 		return (&state->ss);
72 	case VM_REG_GUEST_GDTR:
73 		return (&state->gdt);
74 	case VM_REG_GUEST_IDTR:
75 		return (&state->idt);
76 	case VM_REG_GUEST_LDTR:
77 		return (&state->ldt);
78 	case VM_REG_GUEST_TR:
79 		return (&state->tr);
80 	default:
81 		panic("unexpected seg %d", type);
82 	}
83 }
84 
85 uint64_t *
86 vmcb_regptr(struct vmcb *vmcb, int ident, uint32_t *dirtyp)
87 {
88 	struct vmcb_state *state;
89 	uint64_t *res = NULL;
90 	uint32_t dirty = VMCB_CACHE_NONE;
91 
92 	state = &vmcb->state;
93 
94 	switch (ident) {
95 	case VM_REG_GUEST_CR2:
96 		res = &state->cr2;
97 		dirty = VMCB_CACHE_CR2;
98 		break;
99 
100 	case VM_REG_GUEST_CR3:
101 		res = &state->cr3;
102 		dirty = VMCB_CACHE_CR;
103 		break;
104 
105 	case VM_REG_GUEST_CR4:
106 		res = &state->cr4;
107 		dirty = VMCB_CACHE_CR;
108 		break;
109 
110 	case VM_REG_GUEST_DR6:
111 		res = &state->dr6;
112 		dirty = VMCB_CACHE_DR;
113 		break;
114 
115 	case VM_REG_GUEST_DR7:
116 		res = &state->dr7;
117 		dirty = VMCB_CACHE_DR;
118 		break;
119 
120 	case VM_REG_GUEST_EFER:
121 		res = &state->efer;
122 		dirty = VMCB_CACHE_CR;
123 		break;
124 
125 	case VM_REG_GUEST_RAX:
126 		res = &state->rax;
127 		break;
128 
129 	case VM_REG_GUEST_RFLAGS:
130 		res = &state->rflags;
131 		break;
132 
133 	case VM_REG_GUEST_RIP:
134 		res = &state->rip;
135 		break;
136 
137 	case VM_REG_GUEST_RSP:
138 		res = &state->rsp;
139 		break;
140 
141 	default:
142 		panic("unexpected register %d", ident);
143 		break;
144 	}
145 
146 	ASSERT(res != NULL);
147 	if (dirtyp != NULL) {
148 		*dirtyp |= dirty;
149 	}
150 	return (res);
151 }
152 
153 uint64_t *
154 vmcb_msr_ptr(struct vmcb *vmcb, uint32_t msr, uint32_t *dirtyp)
155 {
156 	uint64_t *res = NULL;
157 	uint32_t dirty = 0;
158 	struct vmcb_state *state = &vmcb->state;
159 
160 	switch (msr) {
161 	case MSR_EFER:
162 		res = &state->efer;
163 		dirty = VMCB_CACHE_CR;
164 		break;
165 
166 	case MSR_GSBASE:
167 		res = &state->gs.base;
168 		dirty = VMCB_CACHE_SEG;
169 		break;
170 	case MSR_FSBASE:
171 		res = &state->fs.base;
172 		dirty = VMCB_CACHE_SEG;
173 		break;
174 	case MSR_KGSBASE:
175 		res = &state->kernelgsbase;
176 		break;
177 
178 	case MSR_STAR:
179 		res = &state->star;
180 		break;
181 	case MSR_LSTAR:
182 		res = &state->lstar;
183 		break;
184 	case MSR_CSTAR:
185 		res = &state->cstar;
186 		break;
187 	case MSR_SF_MASK:
188 		res = &state->sfmask;
189 		break;
190 
191 	case MSR_SYSENTER_CS_MSR:
192 		res = &state->sysenter_cs;
193 		break;
194 	case MSR_SYSENTER_ESP_MSR:
195 		res = &state->sysenter_esp;
196 		break;
197 	case MSR_SYSENTER_EIP_MSR:
198 		res = &state->sysenter_eip;
199 		break;
200 
201 	case MSR_PAT:
202 		res = &state->g_pat;
203 		dirty = VMCB_CACHE_NP;
204 		break;
205 	}
206 
207 	if (res != NULL && dirtyp != NULL) {
208 		*dirtyp = dirty;
209 	}
210 	return (res);
211 }
212