2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 #ifndef __VMX_LOWLEVEL_H__
21 #define __VMX_LOWLEVEL_H__
27 #define VMX_FAIL_INVALID 1
28 #define VMX_FAIL_VALID 2
31 #define CHECK_VMXFAIL(ret_valid, ret_invalid) \
33 return VMX_FAIL_VALID; \
34 } else if (ret_invalid) { \
35 return VMX_FAIL_INVALID; \
38 /* Opcode definitions for all the VM instructions */
40 #define VMCLEAR_OPCODE ".byte 0x66,0xf,0xc7;" /* reg=/6 */
41 #define VMRESUME_OPCODE ".byte 0x0f,0x01,0xc3;"
42 #define VMPTRLD_OPCODE ".byte 0x0f,0xc7;" /* reg=/6 */
43 #define VMPTRST_OPCODE ".byte 0x0f,0xc7;" /* reg=/7 */
44 #define VMREAD_OPCODE ".byte 0x0f,0x78;"
45 #define VMWRITE_OPCODE ".byte 0x0f,0x79;"
46 #define VMXOFF_OPCODE ".byte 0x0f,0x01,0xc4;"
47 #define VMXON_OPCODE ".byte 0xf3,0x0f,0xc7;" /* reg=/6 */
50 /* Mod/rm definitions for intel registers/memory */
51 #define EAX_ECX_MODRM ".byte 0xc1;"
53 #define EAX_06_MODRM ".byte 0x30;"
55 #define EAX_07_MODRM ".byte 0x38;"
59 static inline int v3_enable_vmx(addr_t vmxon_ptr) {
60 uint64_t vmxon_ptr_64 __attribute__((aligned(8))) = (uint64_t)vmxon_ptr;
61 uint8_t ret_invalid = 0;
63 __asm__ __volatile__ (
66 "setnaeb %0;" // fail invalid (CF=1)
68 : "a"(&vmxon_ptr_64),"0"(ret_invalid)
72 return VMX_FAIL_INVALID;
78 static inline int vmcs_clear(addr_t vmcs_ptr) {
79 uint64_t vmcs_ptr_64 __attribute__ ((aligned(8))) = (uint64_t)vmcs_ptr;
80 uint8_t ret_valid = 0;
81 uint8_t ret_invalid = 0;
83 __asm__ __volatile__ (
86 "seteb %0;" // fail valid (ZF=1)
87 "setnaeb %1;" // fail invalid (CF=1)
88 : "=q"(ret_valid), "=q"(ret_invalid)
89 : "a"(&vmcs_ptr_64), "0"(ret_valid), "1"(ret_invalid)
92 CHECK_VMXFAIL(ret_valid, ret_invalid);
97 static inline int vmcs_load(addr_t vmcs_ptr) {
98 uint64_t vmcs_ptr_64 = (uint64_t)vmcs_ptr;
99 uint8_t ret_valid = 0;
100 uint8_t ret_invalid = 0;
102 __asm__ __volatile__ (
105 "seteb %0;" // fail valid (ZF=1)
106 "setnaeb %1;" // fail invalid (CF=1)
107 : "=q"(ret_valid), "=q"(ret_invalid)
108 : "a"(&vmcs_ptr_64), "0"(ret_valid), "1"(ret_invalid)
111 CHECK_VMXFAIL(ret_valid, ret_invalid);
116 static inline int vmcs_store(addr_t vmcs_ptr) {
117 uint64_t vmcs_ptr_64 = (uint64_t)vmcs_ptr;
119 __asm__ __volatile__ (
129 static inline int vmcs_read(vmcs_field_t vmcs_field, void * dst) {
131 uint8_t ret_valid = 0;
132 uint8_t ret_invalid = 0;
134 __asm__ __volatile__ (
137 "seteb %0;" // fail valid
138 "setnaeb %1;" // fail invalid
139 : "=q"(ret_valid), "=q"(ret_invalid), "=c"(val) // Use ECX
140 : "a" (vmcs_field), "0"(ret_valid), "1"(ret_invalid)
144 CHECK_VMXFAIL(ret_valid, ret_invalid);
146 switch(v3_vmcs_get_field_len(vmcs_field))
149 *((uint16_t*)dst) = (uint16_t)val;
152 *((uint32_t*)dst) = (uint32_t)val;
155 *((uint64_t*)dst) = (uint64_t)val;
163 static inline int vmcs_write(vmcs_field_t vmcs_field, addr_t value) {
164 uint8_t ret_valid = 0;
165 uint8_t ret_invalid = 0;
167 __asm__ __volatile__ (
170 "seteb %0;" // fail valid (ZF=1)
171 "setnaeb %1;" // fail invalid (CF=1)
172 : "=q" (ret_valid), "=q" (ret_invalid)
173 : "a" (vmcs_field), "c"(value), "0"(ret_valid), "1"(ret_invalid)
176 CHECK_VMXFAIL(ret_valid, ret_invalid);
181 static inline int vmx_off() {
182 uint8_t ret_valid = 0;
183 uint8_t ret_invalid = 0;
185 __asm__ __volatile__ (
189 : "=q"(ret_valid), "=q"(ret_invalid)
190 : "0"(ret_valid), "1"(ret_invalid)
193 CHECK_VMXFAIL(ret_valid, ret_invalid);