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1 /*
2 * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 #ifndef _I386_VMX_ASM_H_
30 #define _I386_VMX_ASM_H_
31
32 #include <mach/machine/vm_types.h>
33 #include <mach/boolean.h>
34 #include <kern/assert.h>
35 #include <i386/eflags.h>
36 #include <i386/seg.h>
37
38 #define VMX_FAIL_INVALID -1
39 #define VMX_FAIL_VALID -2
40 #define VMX_SUCCEED 0
41
42 static inline void enter_64bit_mode(void) {
43 __asm__ __volatile__ (
44 ".byte 0xea /* far jump longmode */ \n\t"
45 ".long 1f \n\t"
46 ".word %P0 \n\t"
47 ".code64 \n\t"
48 "1:"
49 :: "i" (KERNEL64_CS)
50 );
51 }
52 static inline void enter_compat_mode(void) {
53 asm(
54 "ljmp *4f \n\t"
55 "4: \n\t"
56 ".long 5f \n\t"
57 ".word %P0 \n\t"
58 ".code32 \n\t"
59 "5:"
60 :: "i" (KERNEL32_CS)
61 );
62 }
63
64 #define __VMXOFF(res) \
65 __asm__ __volatile__ ( \
66 "vmxoff \n\t" \
67 "cmovcl %2, %0 \n\t" /* CF = 1, ZF = 0 */ \
68 "cmovzl %3, %0" /* CF = 0, ZF = 1 */ \
69 : "=&r" (res) \
70 : "0" (VMX_SUCCEED), \
71 "r" (VMX_FAIL_INVALID), \
72 "r" (VMX_FAIL_VALID) \
73 : "memory", "cc" \
74 )
75
76 #define __VMXON(addr, res) \
77 __asm__ __volatile__ ( \
78 "vmxon %4 \n\t" \
79 "cmovcl %2, %0 \n\t" /* CF = 1, ZF = 0 */ \
80 "cmovzl %3, %0" /* CF = 0, ZF = 1 */ \
81 : "=&r" (res) \
82 : "0" (VMX_SUCCEED), \
83 "r" (VMX_FAIL_INVALID), \
84 "r" (VMX_FAIL_VALID), \
85 "m" (*addr) \
86 : "memory", "cc" \
87 );
88
89
90 /*
91 * __vmxoff -- Leave VMX Operation
92 *
93 */
94 static inline int
95 __vmxoff(void)
96 {
97 int result;
98 #if defined (__x86_64__)
99 __VMXOFF(result);
100 #else
101 if (ml_is64bit()) {
102 /* don't put anything between these lines! */
103 enter_64bit_mode();
104 __VMXOFF(result);
105 enter_compat_mode();
106 } else {
107 __VMXOFF(result);
108 }
109 #endif
110 return result;
111 }
112
113 /*
114 * __vmxon -- Enter VMX Operation
115 *
116 */
117 static inline int
118 __vmxon(addr64_t *v)
119 {
120 int result;
121 #if defined (__x86_64__)
122 __VMXON(v, result);
123 #else
124 if (ml_is64bit()) {
125 /* don't put anything between these lines! */
126 enter_64bit_mode();
127 __VMXON(v, result);
128 enter_compat_mode();
129 } else {
130 __VMXON(v, result);
131 }
132 #endif
133 return result;
134 }
135
136 /*
137 * VMX Capability Registers (VCR)
138 *
139 */
140 #define VMX_VCR_VMCS_MEM_TYPE_BIT 50
141 #define VMX_VCR_VMCS_MEM_TYPE_MASK 0xF
142
143 #define VMX_VCR_VMCS_SIZE_BIT 32
144 #define VMX_VCR_VMCS_SIZE_MASK 0x01FFF
145 #define VMX_VCR_VMCS_REV_ID 0x00000000FFFFFFFFLL
146
147 #define VMX_VCR_ACT_HLT_BIT 6
148 #define VMX_VCR_ACT_HLT_MASK 0x1
149 #define VMX_VCR_ACT_SHUTDOWN_BIT 7
150 #define VMX_VCR_ACT_SHUTDOWN_MASK 0x1
151 #define VMX_VCR_ACT_SIPI_BIT 8
152 #define VMX_VCR_ACT_SIPI_MASK 0x1
153 #define VMX_VCR_ACT_CSTATE_BIT 9
154 #define VMX_VCR_ACT_CSTATE_MASK 0x1
155 #define VMX_VCR_CR3_TARGS_BIT 16
156 #define VMX_VCR_CR3_TARGS_MASK 0xFF
157 #define VMX_VCR_MAX_MSRS_BIT 25
158 #define VMX_VCR_MAX_MSRS_MASK 0x7
159 #define VMX_VCR_MSEG_ID_BIT 32
160 #define VMX_VCR_MSEG_ID_MASK 0xFFFFFFFF
161
162 #endif /* _I386_VMX_H_ */