1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 NetApp, Inc.
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, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 /*
29 * This file and its contents are supplied under the terms of the
30 * Common Development and Distribution License ("CDDL"), version 1.0.
31 * You may only use this file in accordance with the terms of version
32 * 1.0 of the CDDL.
33 *
34 * A full copy of the text of the CDDL should have accompanied this
35 * source. A copy of the CDDL is also available via the Internet at
36 * http://www.illumos.org/license/CDDL.
37 */
38 /* This file is dual-licensed; see usr/src/contrib/bhyve/LICENSE */
39
40 /*
41 * Copyright 2013 Pluribus Networks Inc.
42 * Copyright 2017 Joyent, Inc.
43 */
44
45 #ifndef _VMM_HOST_H_
46 #define _VMM_HOST_H_
47
48 #ifndef __FreeBSD__
49 #include <sys/cpuvar.h>
50 #endif
51
52 #ifndef _KERNEL
53 #error "no user-serviceable parts inside"
54 #endif
55
56 struct xsave_limits {
57 int xsave_enabled;
58 uint64_t xcr0_allowed;
59 uint32_t xsave_max_size;
60 };
61
62 void vmm_host_state_init(void);
63
64 uint64_t vmm_get_host_pat(void);
65 uint64_t vmm_get_host_efer(void);
66 uint64_t vmm_get_host_cr0(void);
67 uint64_t vmm_get_host_cr4(void);
68 uint64_t vmm_get_host_xcr0(void);
69 uint64_t vmm_get_host_datasel(void);
70 uint64_t vmm_get_host_codesel(void);
71 uint64_t vmm_get_host_tsssel(void);
72 uint64_t vmm_get_host_fsbase(void);
73 uint64_t vmm_get_host_idtrbase(void);
74 const struct xsave_limits *vmm_get_xsave_limits(void);
75
76 /*
77 * Inline access to host state that is used on every VM entry
78 */
79 static __inline uint64_t
vmm_get_host_trbase(void)80 vmm_get_host_trbase(void)
81 {
82 return ((uint64_t)CPU->cpu_tss);
83 }
84
85 static __inline uint64_t
vmm_get_host_gdtrbase(void)86 vmm_get_host_gdtrbase(void)
87 {
88
89 #ifdef __FreeBSD__
90 return ((uint64_t)*PCPU_PTR(gdt));
91 #else
92 desctbr_t gdtr;
93
94 rd_gdtr(&gdtr);
95 return (gdtr.dtr_base);
96 #endif
97 }
98
99 static __inline uint64_t
vmm_get_host_gsbase(void)100 vmm_get_host_gsbase(void)
101 {
102
103 #ifdef __FreeBSD__
104 return ((uint64_t)get_pcpu());
105 #else
106 return (rdmsr(MSR_GSBASE));
107 #endif
108 }
109
110 #ifndef __FreeBSD__
111 static __inline uint64_t
vmm_get_host_fssel(void)112 vmm_get_host_fssel(void)
113 {
114 return (KFS_SEL);
115 }
116
117 static __inline uint64_t
vmm_get_host_gssel(void)118 vmm_get_host_gssel(void)
119 {
120 return (KGS_SEL);
121 }
122 #endif
123 #endif
124