xref: /illumos-gate/usr/src/uts/intel/io/vmm/vmm_host.h (revision 32640292)
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  * Copyright 2013 Pluribus Networks Inc.
39  * Copyright 2017 Joyent, Inc.
40  */
41 
42 #ifndef	_VMM_HOST_H_
43 #define	_VMM_HOST_H_
44 
45 #ifndef	__FreeBSD__
46 #include <sys/cpuvar.h>
47 #endif
48 
49 #ifndef	_KERNEL
50 #error "no user-serviceable parts inside"
51 #endif
52 
53 struct xsave_limits {
54 	int		xsave_enabled;
55 	uint64_t	xcr0_allowed;
56 	uint32_t	xsave_max_size;
57 };
58 
59 void vmm_host_state_init(void);
60 
61 uint64_t vmm_get_host_pat(void);
62 uint64_t vmm_get_host_efer(void);
63 uint64_t vmm_get_host_cr0(void);
64 uint64_t vmm_get_host_cr4(void);
65 uint64_t vmm_get_host_xcr0(void);
66 uint64_t vmm_get_host_datasel(void);
67 uint64_t vmm_get_host_codesel(void);
68 uint64_t vmm_get_host_tsssel(void);
69 uint64_t vmm_get_host_fsbase(void);
70 uint64_t vmm_get_host_idtrbase(void);
71 const struct xsave_limits *vmm_get_xsave_limits(void);
72 
73 /*
74  * Inline access to host state that is used on every VM entry
75  */
76 static __inline uint64_t
vmm_get_host_trbase(void)77 vmm_get_host_trbase(void)
78 {
79 	return ((uint64_t)CPU->cpu_tss);
80 }
81 
82 static __inline uint64_t
vmm_get_host_gdtrbase(void)83 vmm_get_host_gdtrbase(void)
84 {
85 
86 #ifdef	__FreeBSD__
87 	return ((uint64_t)*PCPU_PTR(gdt));
88 #else
89 	desctbr_t gdtr;
90 
91 	rd_gdtr(&gdtr);
92 	return (gdtr.dtr_base);
93 #endif
94 }
95 
96 static __inline uint64_t
vmm_get_host_gsbase(void)97 vmm_get_host_gsbase(void)
98 {
99 
100 #ifdef	__FreeBSD__
101 	return ((uint64_t)get_pcpu());
102 #else
103 	return (rdmsr(MSR_GSBASE));
104 #endif
105 }
106 
107 #ifndef	__FreeBSD__
108 static __inline uint64_t
vmm_get_host_fssel(void)109 vmm_get_host_fssel(void)
110 {
111 	return (KFS_SEL);
112 }
113 
114 static __inline uint64_t
vmm_get_host_gssel(void)115 vmm_get_host_gssel(void)
116 {
117 	return (KGS_SEL);
118 }
119 #endif
120 #endif
121