nvmm_x86_svm.c revision 1.20
1 /* $NetBSD: nvmm_x86_svm.c,v 1.20 2019/02/12 14:54:59 maxv Exp $ */ 2 3 /* 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Maxime Villard. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: nvmm_x86_svm.c,v 1.20 2019/02/12 14:54:59 maxv Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/kmem.h> 39 #include <sys/cpu.h> 40 #include <sys/xcall.h> 41 42 #include <uvm/uvm.h> 43 #include <uvm/uvm_page.h> 44 45 #include <x86/cputypes.h> 46 #include <x86/specialreg.h> 47 #include <x86/pmap.h> 48 #include <x86/dbregs.h> 49 #include <machine/cpuvar.h> 50 51 #include <dev/nvmm/nvmm.h> 52 #include <dev/nvmm/nvmm_internal.h> 53 #include <dev/nvmm/x86/nvmm_x86.h> 54 55 int svm_vmrun(paddr_t, uint64_t *); 56 57 #define MSR_VM_HSAVE_PA 0xC0010117 58 59 /* -------------------------------------------------------------------------- */ 60 61 #define VMCB_EXITCODE_CR0_READ 0x0000 62 #define VMCB_EXITCODE_CR1_READ 0x0001 63 #define VMCB_EXITCODE_CR2_READ 0x0002 64 #define VMCB_EXITCODE_CR3_READ 0x0003 65 #define VMCB_EXITCODE_CR4_READ 0x0004 66 #define VMCB_EXITCODE_CR5_READ 0x0005 67 #define VMCB_EXITCODE_CR6_READ 0x0006 68 #define VMCB_EXITCODE_CR7_READ 0x0007 69 #define VMCB_EXITCODE_CR8_READ 0x0008 70 #define VMCB_EXITCODE_CR9_READ 0x0009 71 #define VMCB_EXITCODE_CR10_READ 0x000A 72 #define VMCB_EXITCODE_CR11_READ 0x000B 73 #define VMCB_EXITCODE_CR12_READ 0x000C 74 #define VMCB_EXITCODE_CR13_READ 0x000D 75 #define VMCB_EXITCODE_CR14_READ 0x000E 76 #define VMCB_EXITCODE_CR15_READ 0x000F 77 #define VMCB_EXITCODE_CR0_WRITE 0x0010 78 #define VMCB_EXITCODE_CR1_WRITE 0x0011 79 #define VMCB_EXITCODE_CR2_WRITE 0x0012 80 #define VMCB_EXITCODE_CR3_WRITE 0x0013 81 #define VMCB_EXITCODE_CR4_WRITE 0x0014 82 #define VMCB_EXITCODE_CR5_WRITE 0x0015 83 #define VMCB_EXITCODE_CR6_WRITE 0x0016 84 #define VMCB_EXITCODE_CR7_WRITE 0x0017 85 #define VMCB_EXITCODE_CR8_WRITE 0x0018 86 #define VMCB_EXITCODE_CR9_WRITE 0x0019 87 #define VMCB_EXITCODE_CR10_WRITE 0x001A 88 #define VMCB_EXITCODE_CR11_WRITE 0x001B 89 #define VMCB_EXITCODE_CR12_WRITE 0x001C 90 #define VMCB_EXITCODE_CR13_WRITE 0x001D 91 #define VMCB_EXITCODE_CR14_WRITE 0x001E 92 #define VMCB_EXITCODE_CR15_WRITE 0x001F 93 #define VMCB_EXITCODE_DR0_READ 0x0020 94 #define VMCB_EXITCODE_DR1_READ 0x0021 95 #define VMCB_EXITCODE_DR2_READ 0x0022 96 #define VMCB_EXITCODE_DR3_READ 0x0023 97 #define VMCB_EXITCODE_DR4_READ 0x0024 98 #define VMCB_EXITCODE_DR5_READ 0x0025 99 #define VMCB_EXITCODE_DR6_READ 0x0026 100 #define VMCB_EXITCODE_DR7_READ 0x0027 101 #define VMCB_EXITCODE_DR8_READ 0x0028 102 #define VMCB_EXITCODE_DR9_READ 0x0029 103 #define VMCB_EXITCODE_DR10_READ 0x002A 104 #define VMCB_EXITCODE_DR11_READ 0x002B 105 #define VMCB_EXITCODE_DR12_READ 0x002C 106 #define VMCB_EXITCODE_DR13_READ 0x002D 107 #define VMCB_EXITCODE_DR14_READ 0x002E 108 #define VMCB_EXITCODE_DR15_READ 0x002F 109 #define VMCB_EXITCODE_DR0_WRITE 0x0030 110 #define VMCB_EXITCODE_DR1_WRITE 0x0031 111 #define VMCB_EXITCODE_DR2_WRITE 0x0032 112 #define VMCB_EXITCODE_DR3_WRITE 0x0033 113 #define VMCB_EXITCODE_DR4_WRITE 0x0034 114 #define VMCB_EXITCODE_DR5_WRITE 0x0035 115 #define VMCB_EXITCODE_DR6_WRITE 0x0036 116 #define VMCB_EXITCODE_DR7_WRITE 0x0037 117 #define VMCB_EXITCODE_DR8_WRITE 0x0038 118 #define VMCB_EXITCODE_DR9_WRITE 0x0039 119 #define VMCB_EXITCODE_DR10_WRITE 0x003A 120 #define VMCB_EXITCODE_DR11_WRITE 0x003B 121 #define VMCB_EXITCODE_DR12_WRITE 0x003C 122 #define VMCB_EXITCODE_DR13_WRITE 0x003D 123 #define VMCB_EXITCODE_DR14_WRITE 0x003E 124 #define VMCB_EXITCODE_DR15_WRITE 0x003F 125 #define VMCB_EXITCODE_EXCP0 0x0040 126 #define VMCB_EXITCODE_EXCP1 0x0041 127 #define VMCB_EXITCODE_EXCP2 0x0042 128 #define VMCB_EXITCODE_EXCP3 0x0043 129 #define VMCB_EXITCODE_EXCP4 0x0044 130 #define VMCB_EXITCODE_EXCP5 0x0045 131 #define VMCB_EXITCODE_EXCP6 0x0046 132 #define VMCB_EXITCODE_EXCP7 0x0047 133 #define VMCB_EXITCODE_EXCP8 0x0048 134 #define VMCB_EXITCODE_EXCP9 0x0049 135 #define VMCB_EXITCODE_EXCP10 0x004A 136 #define VMCB_EXITCODE_EXCP11 0x004B 137 #define VMCB_EXITCODE_EXCP12 0x004C 138 #define VMCB_EXITCODE_EXCP13 0x004D 139 #define VMCB_EXITCODE_EXCP14 0x004E 140 #define VMCB_EXITCODE_EXCP15 0x004F 141 #define VMCB_EXITCODE_EXCP16 0x0050 142 #define VMCB_EXITCODE_EXCP17 0x0051 143 #define VMCB_EXITCODE_EXCP18 0x0052 144 #define VMCB_EXITCODE_EXCP19 0x0053 145 #define VMCB_EXITCODE_EXCP20 0x0054 146 #define VMCB_EXITCODE_EXCP21 0x0055 147 #define VMCB_EXITCODE_EXCP22 0x0056 148 #define VMCB_EXITCODE_EXCP23 0x0057 149 #define VMCB_EXITCODE_EXCP24 0x0058 150 #define VMCB_EXITCODE_EXCP25 0x0059 151 #define VMCB_EXITCODE_EXCP26 0x005A 152 #define VMCB_EXITCODE_EXCP27 0x005B 153 #define VMCB_EXITCODE_EXCP28 0x005C 154 #define VMCB_EXITCODE_EXCP29 0x005D 155 #define VMCB_EXITCODE_EXCP30 0x005E 156 #define VMCB_EXITCODE_EXCP31 0x005F 157 #define VMCB_EXITCODE_INTR 0x0060 158 #define VMCB_EXITCODE_NMI 0x0061 159 #define VMCB_EXITCODE_SMI 0x0062 160 #define VMCB_EXITCODE_INIT 0x0063 161 #define VMCB_EXITCODE_VINTR 0x0064 162 #define VMCB_EXITCODE_CR0_SEL_WRITE 0x0065 163 #define VMCB_EXITCODE_IDTR_READ 0x0066 164 #define VMCB_EXITCODE_GDTR_READ 0x0067 165 #define VMCB_EXITCODE_LDTR_READ 0x0068 166 #define VMCB_EXITCODE_TR_READ 0x0069 167 #define VMCB_EXITCODE_IDTR_WRITE 0x006A 168 #define VMCB_EXITCODE_GDTR_WRITE 0x006B 169 #define VMCB_EXITCODE_LDTR_WRITE 0x006C 170 #define VMCB_EXITCODE_TR_WRITE 0x006D 171 #define VMCB_EXITCODE_RDTSC 0x006E 172 #define VMCB_EXITCODE_RDPMC 0x006F 173 #define VMCB_EXITCODE_PUSHF 0x0070 174 #define VMCB_EXITCODE_POPF 0x0071 175 #define VMCB_EXITCODE_CPUID 0x0072 176 #define VMCB_EXITCODE_RSM 0x0073 177 #define VMCB_EXITCODE_IRET 0x0074 178 #define VMCB_EXITCODE_SWINT 0x0075 179 #define VMCB_EXITCODE_INVD 0x0076 180 #define VMCB_EXITCODE_PAUSE 0x0077 181 #define VMCB_EXITCODE_HLT 0x0078 182 #define VMCB_EXITCODE_INVLPG 0x0079 183 #define VMCB_EXITCODE_INVLPGA 0x007A 184 #define VMCB_EXITCODE_IOIO 0x007B 185 #define VMCB_EXITCODE_MSR 0x007C 186 #define VMCB_EXITCODE_TASK_SWITCH 0x007D 187 #define VMCB_EXITCODE_FERR_FREEZE 0x007E 188 #define VMCB_EXITCODE_SHUTDOWN 0x007F 189 #define VMCB_EXITCODE_VMRUN 0x0080 190 #define VMCB_EXITCODE_VMMCALL 0x0081 191 #define VMCB_EXITCODE_VMLOAD 0x0082 192 #define VMCB_EXITCODE_VMSAVE 0x0083 193 #define VMCB_EXITCODE_STGI 0x0084 194 #define VMCB_EXITCODE_CLGI 0x0085 195 #define VMCB_EXITCODE_SKINIT 0x0086 196 #define VMCB_EXITCODE_RDTSCP 0x0087 197 #define VMCB_EXITCODE_ICEBP 0x0088 198 #define VMCB_EXITCODE_WBINVD 0x0089 199 #define VMCB_EXITCODE_MONITOR 0x008A 200 #define VMCB_EXITCODE_MWAIT 0x008B 201 #define VMCB_EXITCODE_MWAIT_CONDITIONAL 0x008C 202 #define VMCB_EXITCODE_XSETBV 0x008D 203 #define VMCB_EXITCODE_EFER_WRITE_TRAP 0x008F 204 #define VMCB_EXITCODE_CR0_WRITE_TRAP 0x0090 205 #define VMCB_EXITCODE_CR1_WRITE_TRAP 0x0091 206 #define VMCB_EXITCODE_CR2_WRITE_TRAP 0x0092 207 #define VMCB_EXITCODE_CR3_WRITE_TRAP 0x0093 208 #define VMCB_EXITCODE_CR4_WRITE_TRAP 0x0094 209 #define VMCB_EXITCODE_CR5_WRITE_TRAP 0x0095 210 #define VMCB_EXITCODE_CR6_WRITE_TRAP 0x0096 211 #define VMCB_EXITCODE_CR7_WRITE_TRAP 0x0097 212 #define VMCB_EXITCODE_CR8_WRITE_TRAP 0x0098 213 #define VMCB_EXITCODE_CR9_WRITE_TRAP 0x0099 214 #define VMCB_EXITCODE_CR10_WRITE_TRAP 0x009A 215 #define VMCB_EXITCODE_CR11_WRITE_TRAP 0x009B 216 #define VMCB_EXITCODE_CR12_WRITE_TRAP 0x009C 217 #define VMCB_EXITCODE_CR13_WRITE_TRAP 0x009D 218 #define VMCB_EXITCODE_CR14_WRITE_TRAP 0x009E 219 #define VMCB_EXITCODE_CR15_WRITE_TRAP 0x009F 220 #define VMCB_EXITCODE_NPF 0x0400 221 #define VMCB_EXITCODE_AVIC_INCOMP_IPI 0x0401 222 #define VMCB_EXITCODE_AVIC_NOACCEL 0x0402 223 #define VMCB_EXITCODE_VMGEXIT 0x0403 224 #define VMCB_EXITCODE_INVALID -1 225 226 /* -------------------------------------------------------------------------- */ 227 228 struct vmcb_ctrl { 229 uint32_t intercept_cr; 230 #define VMCB_CTRL_INTERCEPT_RCR(x) __BIT( 0 + x) 231 #define VMCB_CTRL_INTERCEPT_WCR(x) __BIT(16 + x) 232 233 uint32_t intercept_dr; 234 #define VMCB_CTRL_INTERCEPT_RDR(x) __BIT( 0 + x) 235 #define VMCB_CTRL_INTERCEPT_WDR(x) __BIT(16 + x) 236 237 uint32_t intercept_vec; 238 #define VMCB_CTRL_INTERCEPT_VEC(x) __BIT(x) 239 240 uint32_t intercept_misc1; 241 #define VMCB_CTRL_INTERCEPT_INTR __BIT(0) 242 #define VMCB_CTRL_INTERCEPT_NMI __BIT(1) 243 #define VMCB_CTRL_INTERCEPT_SMI __BIT(2) 244 #define VMCB_CTRL_INTERCEPT_INIT __BIT(3) 245 #define VMCB_CTRL_INTERCEPT_VINTR __BIT(4) 246 #define VMCB_CTRL_INTERCEPT_CR0_SPEC __BIT(5) 247 #define VMCB_CTRL_INTERCEPT_RIDTR __BIT(6) 248 #define VMCB_CTRL_INTERCEPT_RGDTR __BIT(7) 249 #define VMCB_CTRL_INTERCEPT_RLDTR __BIT(8) 250 #define VMCB_CTRL_INTERCEPT_RTR __BIT(9) 251 #define VMCB_CTRL_INTERCEPT_WIDTR __BIT(10) 252 #define VMCB_CTRL_INTERCEPT_WGDTR __BIT(11) 253 #define VMCB_CTRL_INTERCEPT_WLDTR __BIT(12) 254 #define VMCB_CTRL_INTERCEPT_WTR __BIT(13) 255 #define VMCB_CTRL_INTERCEPT_RDTSC __BIT(14) 256 #define VMCB_CTRL_INTERCEPT_RDPMC __BIT(15) 257 #define VMCB_CTRL_INTERCEPT_PUSHF __BIT(16) 258 #define VMCB_CTRL_INTERCEPT_POPF __BIT(17) 259 #define VMCB_CTRL_INTERCEPT_CPUID __BIT(18) 260 #define VMCB_CTRL_INTERCEPT_RSM __BIT(19) 261 #define VMCB_CTRL_INTERCEPT_IRET __BIT(20) 262 #define VMCB_CTRL_INTERCEPT_INTN __BIT(21) 263 #define VMCB_CTRL_INTERCEPT_INVD __BIT(22) 264 #define VMCB_CTRL_INTERCEPT_PAUSE __BIT(23) 265 #define VMCB_CTRL_INTERCEPT_HLT __BIT(24) 266 #define VMCB_CTRL_INTERCEPT_INVLPG __BIT(25) 267 #define VMCB_CTRL_INTERCEPT_INVLPGA __BIT(26) 268 #define VMCB_CTRL_INTERCEPT_IOIO_PROT __BIT(27) 269 #define VMCB_CTRL_INTERCEPT_MSR_PROT __BIT(28) 270 #define VMCB_CTRL_INTERCEPT_TASKSW __BIT(29) 271 #define VMCB_CTRL_INTERCEPT_FERR_FREEZE __BIT(30) 272 #define VMCB_CTRL_INTERCEPT_SHUTDOWN __BIT(31) 273 274 uint32_t intercept_misc2; 275 #define VMCB_CTRL_INTERCEPT_VMRUN __BIT(0) 276 #define VMCB_CTRL_INTERCEPT_VMMCALL __BIT(1) 277 #define VMCB_CTRL_INTERCEPT_VMLOAD __BIT(2) 278 #define VMCB_CTRL_INTERCEPT_VMSAVE __BIT(3) 279 #define VMCB_CTRL_INTERCEPT_STGI __BIT(4) 280 #define VMCB_CTRL_INTERCEPT_CLGI __BIT(5) 281 #define VMCB_CTRL_INTERCEPT_SKINIT __BIT(6) 282 #define VMCB_CTRL_INTERCEPT_RDTSCP __BIT(7) 283 #define VMCB_CTRL_INTERCEPT_ICEBP __BIT(8) 284 #define VMCB_CTRL_INTERCEPT_WBINVD __BIT(9) 285 #define VMCB_CTRL_INTERCEPT_MONITOR __BIT(10) 286 #define VMCB_CTRL_INTERCEPT_MWAIT __BIT(12) 287 #define VMCB_CTRL_INTERCEPT_XSETBV __BIT(13) 288 #define VMCB_CTRL_INTERCEPT_EFER_SPEC __BIT(15) 289 #define VMCB_CTRL_INTERCEPT_WCR_SPEC(x) __BIT(16 + x) 290 291 uint8_t rsvd1[40]; 292 uint16_t pause_filt_thresh; 293 uint16_t pause_filt_cnt; 294 uint64_t iopm_base_pa; 295 uint64_t msrpm_base_pa; 296 uint64_t tsc_offset; 297 uint32_t guest_asid; 298 299 uint32_t tlb_ctrl; 300 #define VMCB_CTRL_TLB_CTRL_FLUSH_ALL 0x01 301 #define VMCB_CTRL_TLB_CTRL_FLUSH_GUEST 0x03 302 #define VMCB_CTRL_TLB_CTRL_FLUSH_GUEST_NONGLOBAL 0x07 303 304 uint64_t v; 305 #define VMCB_CTRL_V_TPR __BITS(7,0) 306 #define VMCB_CTRL_V_IRQ __BIT(8) 307 #define VMCB_CTRL_V_VGIF __BIT(9) 308 #define VMCB_CTRL_V_INTR_PRIO __BITS(19,16) 309 #define VMCB_CTRL_V_IGN_TPR __BIT(20) 310 #define VMCB_CTRL_V_INTR_MASKING __BIT(24) 311 #define VMCB_CTRL_V_GUEST_VGIF __BIT(25) 312 #define VMCB_CTRL_V_AVIC_EN __BIT(31) 313 #define VMCB_CTRL_V_INTR_VECTOR __BITS(39,32) 314 315 uint64_t intr; 316 #define VMCB_CTRL_INTR_SHADOW __BIT(0) 317 318 uint64_t exitcode; 319 uint64_t exitinfo1; 320 uint64_t exitinfo2; 321 322 uint64_t exitintinfo; 323 #define VMCB_CTRL_EXITINTINFO_VECTOR __BITS(7,0) 324 #define VMCB_CTRL_EXITINTINFO_TYPE __BITS(10,8) 325 #define VMCB_CTRL_EXITINTINFO_EV __BIT(11) 326 #define VMCB_CTRL_EXITINTINFO_V __BIT(31) 327 #define VMCB_CTRL_EXITINTINFO_ERRORCODE __BITS(63,32) 328 329 uint64_t enable1; 330 #define VMCB_CTRL_ENABLE_NP __BIT(0) 331 #define VMCB_CTRL_ENABLE_SEV __BIT(1) 332 #define VMCB_CTRL_ENABLE_ES_SEV __BIT(2) 333 334 uint64_t avic; 335 #define VMCB_CTRL_AVIC_APIC_BAR __BITS(51,0) 336 337 uint64_t ghcb; 338 339 uint64_t eventinj; 340 #define VMCB_CTRL_EVENTINJ_VECTOR __BITS(7,0) 341 #define VMCB_CTRL_EVENTINJ_TYPE __BITS(10,8) 342 #define VMCB_CTRL_EVENTINJ_EV __BIT(11) 343 #define VMCB_CTRL_EVENTINJ_V __BIT(31) 344 #define VMCB_CTRL_EVENTINJ_ERRORCODE __BITS(63,32) 345 346 uint64_t n_cr3; 347 348 uint64_t enable2; 349 #define VMCB_CTRL_ENABLE_LBR __BIT(0) 350 #define VMCB_CTRL_ENABLE_VVMSAVE __BIT(1) 351 352 uint32_t vmcb_clean; 353 #define VMCB_CTRL_VMCB_CLEAN_I __BIT(0) 354 #define VMCB_CTRL_VMCB_CLEAN_IOPM __BIT(1) 355 #define VMCB_CTRL_VMCB_CLEAN_ASID __BIT(2) 356 #define VMCB_CTRL_VMCB_CLEAN_TPR __BIT(3) 357 #define VMCB_CTRL_VMCB_CLEAN_NP __BIT(4) 358 #define VMCB_CTRL_VMCB_CLEAN_CR __BIT(5) 359 #define VMCB_CTRL_VMCB_CLEAN_DR __BIT(6) 360 #define VMCB_CTRL_VMCB_CLEAN_DT __BIT(7) 361 #define VMCB_CTRL_VMCB_CLEAN_SEG __BIT(8) 362 #define VMCB_CTRL_VMCB_CLEAN_CR2 __BIT(9) 363 #define VMCB_CTRL_VMCB_CLEAN_LBR __BIT(10) 364 #define VMCB_CTRL_VMCB_CLEAN_AVIC __BIT(11) 365 366 uint32_t rsvd2; 367 uint64_t nrip; 368 uint8_t inst_len; 369 uint8_t inst_bytes[15]; 370 uint64_t avic_abpp; 371 uint64_t rsvd3; 372 uint64_t avic_ltp; 373 374 uint64_t avic_phys; 375 #define VMCB_CTRL_AVIC_PHYS_TABLE_PTR __BITS(51,12) 376 #define VMCB_CTRL_AVIC_PHYS_MAX_INDEX __BITS(7,0) 377 378 uint64_t rsvd4; 379 uint64_t vmcb_ptr; 380 381 uint8_t pad[752]; 382 } __packed; 383 384 CTASSERT(sizeof(struct vmcb_ctrl) == 1024); 385 386 struct vmcb_segment { 387 uint16_t selector; 388 uint16_t attrib; /* hidden */ 389 uint32_t limit; /* hidden */ 390 uint64_t base; /* hidden */ 391 } __packed; 392 393 CTASSERT(sizeof(struct vmcb_segment) == 16); 394 395 struct vmcb_state { 396 struct vmcb_segment es; 397 struct vmcb_segment cs; 398 struct vmcb_segment ss; 399 struct vmcb_segment ds; 400 struct vmcb_segment fs; 401 struct vmcb_segment gs; 402 struct vmcb_segment gdt; 403 struct vmcb_segment ldt; 404 struct vmcb_segment idt; 405 struct vmcb_segment tr; 406 uint8_t rsvd1[43]; 407 uint8_t cpl; 408 uint8_t rsvd2[4]; 409 uint64_t efer; 410 uint8_t rsvd3[112]; 411 uint64_t cr4; 412 uint64_t cr3; 413 uint64_t cr0; 414 uint64_t dr7; 415 uint64_t dr6; 416 uint64_t rflags; 417 uint64_t rip; 418 uint8_t rsvd4[88]; 419 uint64_t rsp; 420 uint8_t rsvd5[24]; 421 uint64_t rax; 422 uint64_t star; 423 uint64_t lstar; 424 uint64_t cstar; 425 uint64_t sfmask; 426 uint64_t kernelgsbase; 427 uint64_t sysenter_cs; 428 uint64_t sysenter_esp; 429 uint64_t sysenter_eip; 430 uint64_t cr2; 431 uint8_t rsvd6[32]; 432 uint64_t g_pat; 433 uint64_t dbgctl; 434 uint64_t br_from; 435 uint64_t br_to; 436 uint64_t int_from; 437 uint64_t int_to; 438 uint8_t pad[2408]; 439 } __packed; 440 441 CTASSERT(sizeof(struct vmcb_state) == 0xC00); 442 443 struct vmcb { 444 struct vmcb_ctrl ctrl; 445 struct vmcb_state state; 446 } __packed; 447 448 CTASSERT(sizeof(struct vmcb) == PAGE_SIZE); 449 CTASSERT(offsetof(struct vmcb, state) == 0x400); 450 451 /* -------------------------------------------------------------------------- */ 452 453 struct svm_hsave { 454 paddr_t pa; 455 }; 456 457 static struct svm_hsave hsave[MAXCPUS]; 458 459 static uint8_t *svm_asidmap __read_mostly; 460 static uint32_t svm_maxasid __read_mostly; 461 static kmutex_t svm_asidlock __cacheline_aligned; 462 463 static bool svm_decode_assist __read_mostly; 464 static uint32_t svm_ctrl_tlb_flush __read_mostly; 465 466 #define SVM_XCR0_MASK_DEFAULT (XCR0_X87|XCR0_SSE) 467 static uint64_t svm_xcr0_mask __read_mostly; 468 469 #define SVM_NCPUIDS 32 470 471 #define VMCB_NPAGES 1 472 473 #define MSRBM_NPAGES 2 474 #define MSRBM_SIZE (MSRBM_NPAGES * PAGE_SIZE) 475 476 #define IOBM_NPAGES 3 477 #define IOBM_SIZE (IOBM_NPAGES * PAGE_SIZE) 478 479 /* Does not include EFER_LMSLE. */ 480 #define EFER_VALID \ 481 (EFER_SCE|EFER_LME|EFER_LMA|EFER_NXE|EFER_SVME|EFER_FFXSR|EFER_TCE) 482 483 #define EFER_TLB_FLUSH \ 484 (EFER_NXE|EFER_LMA|EFER_LME) 485 #define CR0_TLB_FLUSH \ 486 (CR0_PG|CR0_WP|CR0_CD|CR0_NW) 487 #define CR4_TLB_FLUSH \ 488 (CR4_PGE|CR4_PAE|CR4_PSE) 489 490 /* -------------------------------------------------------------------------- */ 491 492 struct svm_machdata { 493 bool cpuidpresent[SVM_NCPUIDS]; 494 struct nvmm_x86_conf_cpuid cpuid[SVM_NCPUIDS]; 495 }; 496 497 static const size_t svm_conf_sizes[NVMM_X86_NCONF] = { 498 [NVMM_X86_CONF_CPUID] = sizeof(struct nvmm_x86_conf_cpuid) 499 }; 500 501 struct svm_cpudata { 502 /* General */ 503 bool shared_asid; 504 bool tlb_want_flush; 505 506 /* VMCB */ 507 struct vmcb *vmcb; 508 paddr_t vmcb_pa; 509 510 /* I/O bitmap */ 511 uint8_t *iobm; 512 paddr_t iobm_pa; 513 514 /* MSR bitmap */ 515 uint8_t *msrbm; 516 paddr_t msrbm_pa; 517 518 /* Host state */ 519 uint64_t hxcr0; 520 uint64_t star; 521 uint64_t lstar; 522 uint64_t cstar; 523 uint64_t sfmask; 524 uint64_t fsbase; 525 uint64_t kernelgsbase; 526 bool ts_set; 527 struct xsave_header hfpu __aligned(64); 528 529 /* Event state */ 530 bool int_window_exit; 531 bool nmi_window_exit; 532 533 /* Guest state */ 534 uint64_t gxcr0; 535 uint64_t gprs[NVMM_X64_NGPR]; 536 uint64_t drs[NVMM_X64_NDR]; 537 uint64_t tsc_offset; 538 struct xsave_header gfpu __aligned(64); 539 }; 540 541 static void 542 svm_vmcb_cache_default(struct vmcb *vmcb) 543 { 544 vmcb->ctrl.vmcb_clean = 545 VMCB_CTRL_VMCB_CLEAN_I | 546 VMCB_CTRL_VMCB_CLEAN_IOPM | 547 VMCB_CTRL_VMCB_CLEAN_ASID | 548 VMCB_CTRL_VMCB_CLEAN_TPR | 549 VMCB_CTRL_VMCB_CLEAN_NP | 550 VMCB_CTRL_VMCB_CLEAN_CR | 551 VMCB_CTRL_VMCB_CLEAN_DR | 552 VMCB_CTRL_VMCB_CLEAN_DT | 553 VMCB_CTRL_VMCB_CLEAN_SEG | 554 VMCB_CTRL_VMCB_CLEAN_CR2 | 555 VMCB_CTRL_VMCB_CLEAN_LBR | 556 VMCB_CTRL_VMCB_CLEAN_AVIC; 557 } 558 559 static void 560 svm_vmcb_cache_update(struct vmcb *vmcb, uint64_t flags) 561 { 562 if (flags & NVMM_X64_STATE_SEGS) { 563 vmcb->ctrl.vmcb_clean &= 564 ~(VMCB_CTRL_VMCB_CLEAN_SEG | VMCB_CTRL_VMCB_CLEAN_DT); 565 } 566 if (flags & NVMM_X64_STATE_CRS) { 567 vmcb->ctrl.vmcb_clean &= 568 ~(VMCB_CTRL_VMCB_CLEAN_CR | VMCB_CTRL_VMCB_CLEAN_CR2 | 569 VMCB_CTRL_VMCB_CLEAN_TPR); 570 } 571 if (flags & NVMM_X64_STATE_DRS) { 572 vmcb->ctrl.vmcb_clean &= ~VMCB_CTRL_VMCB_CLEAN_DR; 573 } 574 if (flags & NVMM_X64_STATE_MSRS) { 575 /* CR for EFER, NP for PAT. */ 576 vmcb->ctrl.vmcb_clean &= 577 ~(VMCB_CTRL_VMCB_CLEAN_CR | VMCB_CTRL_VMCB_CLEAN_NP); 578 } 579 if (flags & NVMM_X64_STATE_MISC) { 580 /* SEG for CPL. */ 581 vmcb->ctrl.vmcb_clean &= ~VMCB_CTRL_VMCB_CLEAN_SEG; 582 } 583 } 584 585 static inline void 586 svm_vmcb_cache_flush(struct vmcb *vmcb, uint64_t flags) 587 { 588 vmcb->ctrl.vmcb_clean &= ~flags; 589 } 590 591 static inline void 592 svm_vmcb_cache_flush_all(struct vmcb *vmcb) 593 { 594 vmcb->ctrl.vmcb_clean = 0; 595 } 596 597 #define SVM_EVENT_TYPE_HW_INT 0 598 #define SVM_EVENT_TYPE_NMI 2 599 #define SVM_EVENT_TYPE_EXC 3 600 #define SVM_EVENT_TYPE_SW_INT 4 601 602 static void 603 svm_event_waitexit_enable(struct nvmm_cpu *vcpu, bool nmi) 604 { 605 struct svm_cpudata *cpudata = vcpu->cpudata; 606 struct vmcb *vmcb = cpudata->vmcb; 607 608 if (nmi) { 609 vmcb->ctrl.intercept_misc1 |= VMCB_CTRL_INTERCEPT_IRET; 610 cpudata->nmi_window_exit = true; 611 } else { 612 vmcb->ctrl.intercept_misc1 |= VMCB_CTRL_INTERCEPT_VINTR; 613 vmcb->ctrl.v |= (VMCB_CTRL_V_IRQ | VMCB_CTRL_V_IGN_TPR); 614 svm_vmcb_cache_flush(vmcb, VMCB_CTRL_VMCB_CLEAN_TPR); 615 cpudata->int_window_exit = true; 616 } 617 618 svm_vmcb_cache_flush(vmcb, VMCB_CTRL_VMCB_CLEAN_I); 619 } 620 621 static void 622 svm_event_waitexit_disable(struct nvmm_cpu *vcpu, bool nmi) 623 { 624 struct svm_cpudata *cpudata = vcpu->cpudata; 625 struct vmcb *vmcb = cpudata->vmcb; 626 627 if (nmi) { 628 vmcb->ctrl.intercept_misc1 &= ~VMCB_CTRL_INTERCEPT_IRET; 629 cpudata->nmi_window_exit = false; 630 } else { 631 vmcb->ctrl.intercept_misc1 &= ~VMCB_CTRL_INTERCEPT_VINTR; 632 vmcb->ctrl.v &= ~(VMCB_CTRL_V_IRQ | VMCB_CTRL_V_IGN_TPR); 633 svm_vmcb_cache_flush(vmcb, VMCB_CTRL_VMCB_CLEAN_TPR); 634 cpudata->int_window_exit = false; 635 } 636 637 svm_vmcb_cache_flush(vmcb, VMCB_CTRL_VMCB_CLEAN_I); 638 } 639 640 static inline int 641 svm_event_has_error(uint64_t vector) 642 { 643 switch (vector) { 644 case 8: /* #DF */ 645 case 10: /* #TS */ 646 case 11: /* #NP */ 647 case 12: /* #SS */ 648 case 13: /* #GP */ 649 case 14: /* #PF */ 650 case 17: /* #AC */ 651 case 30: /* #SX */ 652 return 1; 653 default: 654 return 0; 655 } 656 } 657 658 static int 659 svm_vcpu_inject(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 660 struct nvmm_event *event) 661 { 662 struct svm_cpudata *cpudata = vcpu->cpudata; 663 struct vmcb *vmcb = cpudata->vmcb; 664 int type = 0, err = 0; 665 666 if (event->vector >= 256) { 667 return EINVAL; 668 } 669 670 switch (event->type) { 671 case NVMM_EVENT_INTERRUPT_HW: 672 type = SVM_EVENT_TYPE_HW_INT; 673 if (event->vector == 2) { 674 type = SVM_EVENT_TYPE_NMI; 675 } 676 if (type == SVM_EVENT_TYPE_NMI) { 677 if (cpudata->nmi_window_exit) { 678 return EAGAIN; 679 } 680 svm_event_waitexit_enable(vcpu, true); 681 } else { 682 if (((vmcb->state.rflags & PSL_I) == 0) || 683 ((vmcb->ctrl.intr & VMCB_CTRL_INTR_SHADOW) != 0)) { 684 svm_event_waitexit_enable(vcpu, false); 685 return EAGAIN; 686 } 687 } 688 err = 0; 689 break; 690 case NVMM_EVENT_INTERRUPT_SW: 691 type = SVM_EVENT_TYPE_SW_INT; 692 err = 0; 693 break; 694 case NVMM_EVENT_EXCEPTION: 695 type = SVM_EVENT_TYPE_EXC; 696 if (event->vector == 2 || event->vector >= 32) 697 return EINVAL; 698 err = svm_event_has_error(event->vector); 699 break; 700 default: 701 return EINVAL; 702 } 703 704 vmcb->ctrl.eventinj = 705 __SHIFTIN(event->vector, VMCB_CTRL_EVENTINJ_VECTOR) | 706 __SHIFTIN(type, VMCB_CTRL_EVENTINJ_TYPE) | 707 __SHIFTIN(err, VMCB_CTRL_EVENTINJ_EV) | 708 __SHIFTIN(1, VMCB_CTRL_EVENTINJ_V) | 709 __SHIFTIN(event->u.error, VMCB_CTRL_EVENTINJ_ERRORCODE); 710 711 return 0; 712 } 713 714 static void 715 svm_inject_ud(struct nvmm_machine *mach, struct nvmm_cpu *vcpu) 716 { 717 struct nvmm_event event; 718 int ret __diagused; 719 720 event.type = NVMM_EVENT_EXCEPTION; 721 event.vector = 6; 722 event.u.error = 0; 723 724 ret = svm_vcpu_inject(mach, vcpu, &event); 725 KASSERT(ret == 0); 726 } 727 728 static void 729 svm_inject_gp(struct nvmm_machine *mach, struct nvmm_cpu *vcpu) 730 { 731 struct nvmm_event event; 732 int ret __diagused; 733 734 event.type = NVMM_EVENT_EXCEPTION; 735 event.vector = 13; 736 event.u.error = 0; 737 738 ret = svm_vcpu_inject(mach, vcpu, &event); 739 KASSERT(ret == 0); 740 } 741 742 static inline void 743 svm_inkernel_advance(struct vmcb *vmcb) 744 { 745 /* 746 * Maybe we should also apply single-stepping and debug exceptions. 747 * Matters for guest-ring3, because it can execute 'cpuid' under a 748 * debugger. 749 */ 750 vmcb->state.rip = vmcb->ctrl.nrip; 751 vmcb->ctrl.intr &= ~VMCB_CTRL_INTR_SHADOW; 752 } 753 754 static void 755 svm_inkernel_handle_cpuid(struct nvmm_cpu *vcpu, uint64_t eax, uint64_t ecx) 756 { 757 struct svm_cpudata *cpudata = vcpu->cpudata; 758 759 switch (eax) { 760 case 0x00000001: /* APIC number in RBX. The rest is tunable. */ 761 cpudata->gprs[NVMM_X64_GPR_RBX] &= ~CPUID_LOCAL_APIC_ID; 762 cpudata->gprs[NVMM_X64_GPR_RBX] |= __SHIFTIN(vcpu->cpuid, 763 CPUID_LOCAL_APIC_ID); 764 break; 765 case 0x0000000D: /* FPU description. Not tunable. */ 766 if (ecx != 0 || svm_xcr0_mask == 0) { 767 break; 768 } 769 cpudata->vmcb->state.rax = svm_xcr0_mask & 0xFFFFFFFF; 770 if (cpudata->gxcr0 & XCR0_SSE) { 771 cpudata->gprs[NVMM_X64_GPR_RBX] = sizeof(struct fxsave); 772 } else { 773 cpudata->gprs[NVMM_X64_GPR_RBX] = sizeof(struct save87); 774 } 775 cpudata->gprs[NVMM_X64_GPR_RBX] += 64; /* XSAVE header */ 776 cpudata->gprs[NVMM_X64_GPR_RCX] = sizeof(struct fxsave); 777 cpudata->gprs[NVMM_X64_GPR_RDX] = svm_xcr0_mask >> 32; 778 break; 779 case 0x40000000: 780 cpudata->gprs[NVMM_X64_GPR_RBX] = 0; 781 cpudata->gprs[NVMM_X64_GPR_RCX] = 0; 782 cpudata->gprs[NVMM_X64_GPR_RDX] = 0; 783 memcpy(&cpudata->gprs[NVMM_X64_GPR_RBX], "___ ", 4); 784 memcpy(&cpudata->gprs[NVMM_X64_GPR_RCX], "NVMM", 4); 785 memcpy(&cpudata->gprs[NVMM_X64_GPR_RDX], " ___", 4); 786 break; 787 case 0x80000001: /* No SVM, no RDTSCP. The rest is tunable. */ 788 cpudata->gprs[NVMM_X64_GPR_RCX] &= ~CPUID_SVM; 789 cpudata->gprs[NVMM_X64_GPR_RDX] &= ~CPUID_RDTSCP; 790 break; 791 default: 792 break; 793 } 794 } 795 796 static void 797 svm_exit_cpuid(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 798 struct nvmm_exit *exit) 799 { 800 struct svm_machdata *machdata = mach->machdata; 801 struct svm_cpudata *cpudata = vcpu->cpudata; 802 struct nvmm_x86_conf_cpuid *cpuid; 803 uint64_t eax, ecx; 804 u_int descs[4]; 805 size_t i; 806 807 eax = cpudata->vmcb->state.rax; 808 ecx = cpudata->gprs[NVMM_X64_GPR_RCX]; 809 x86_cpuid2(eax, ecx, descs); 810 811 cpudata->vmcb->state.rax = descs[0]; 812 cpudata->gprs[NVMM_X64_GPR_RBX] = descs[1]; 813 cpudata->gprs[NVMM_X64_GPR_RCX] = descs[2]; 814 cpudata->gprs[NVMM_X64_GPR_RDX] = descs[3]; 815 816 for (i = 0; i < SVM_NCPUIDS; i++) { 817 cpuid = &machdata->cpuid[i]; 818 if (!machdata->cpuidpresent[i]) { 819 continue; 820 } 821 if (cpuid->leaf != eax) { 822 continue; 823 } 824 825 /* del */ 826 cpudata->vmcb->state.rax &= ~cpuid->del.eax; 827 cpudata->gprs[NVMM_X64_GPR_RBX] &= ~cpuid->del.ebx; 828 cpudata->gprs[NVMM_X64_GPR_RCX] &= ~cpuid->del.ecx; 829 cpudata->gprs[NVMM_X64_GPR_RDX] &= ~cpuid->del.edx; 830 831 /* set */ 832 cpudata->vmcb->state.rax |= cpuid->set.eax; 833 cpudata->gprs[NVMM_X64_GPR_RBX] |= cpuid->set.ebx; 834 cpudata->gprs[NVMM_X64_GPR_RCX] |= cpuid->set.ecx; 835 cpudata->gprs[NVMM_X64_GPR_RDX] |= cpuid->set.edx; 836 837 break; 838 } 839 840 /* Overwrite non-tunable leaves. */ 841 svm_inkernel_handle_cpuid(vcpu, eax, ecx); 842 843 svm_inkernel_advance(cpudata->vmcb); 844 exit->reason = NVMM_EXIT_NONE; 845 } 846 847 static void 848 svm_exit_hlt(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 849 struct nvmm_exit *exit) 850 { 851 struct svm_cpudata *cpudata = vcpu->cpudata; 852 struct vmcb *vmcb = cpudata->vmcb; 853 854 if (cpudata->int_window_exit && (vmcb->state.rflags & PSL_I)) { 855 svm_event_waitexit_disable(vcpu, false); 856 } 857 858 svm_inkernel_advance(cpudata->vmcb); 859 exit->reason = NVMM_EXIT_HALTED; 860 } 861 862 #define SVM_EXIT_IO_PORT __BITS(31,16) 863 #define SVM_EXIT_IO_SEG __BITS(12,10) 864 #define SVM_EXIT_IO_A64 __BIT(9) 865 #define SVM_EXIT_IO_A32 __BIT(8) 866 #define SVM_EXIT_IO_A16 __BIT(7) 867 #define SVM_EXIT_IO_SZ32 __BIT(6) 868 #define SVM_EXIT_IO_SZ16 __BIT(5) 869 #define SVM_EXIT_IO_SZ8 __BIT(4) 870 #define SVM_EXIT_IO_REP __BIT(3) 871 #define SVM_EXIT_IO_STR __BIT(2) 872 #define SVM_EXIT_IO_IN __BIT(0) 873 874 static const int seg_to_nvmm[] = { 875 [0] = NVMM_X64_SEG_ES, 876 [1] = NVMM_X64_SEG_CS, 877 [2] = NVMM_X64_SEG_SS, 878 [3] = NVMM_X64_SEG_DS, 879 [4] = NVMM_X64_SEG_FS, 880 [5] = NVMM_X64_SEG_GS 881 }; 882 883 static void 884 svm_exit_io(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 885 struct nvmm_exit *exit) 886 { 887 struct svm_cpudata *cpudata = vcpu->cpudata; 888 uint64_t info = cpudata->vmcb->ctrl.exitinfo1; 889 uint64_t nextpc = cpudata->vmcb->ctrl.exitinfo2; 890 891 exit->reason = NVMM_EXIT_IO; 892 893 if (info & SVM_EXIT_IO_IN) { 894 exit->u.io.type = NVMM_EXIT_IO_IN; 895 } else { 896 exit->u.io.type = NVMM_EXIT_IO_OUT; 897 } 898 899 exit->u.io.port = __SHIFTOUT(info, SVM_EXIT_IO_PORT); 900 901 if (svm_decode_assist) { 902 KASSERT(__SHIFTOUT(info, SVM_EXIT_IO_SEG) < 6); 903 exit->u.io.seg = seg_to_nvmm[__SHIFTOUT(info, SVM_EXIT_IO_SEG)]; 904 } else { 905 exit->u.io.seg = -1; 906 } 907 908 if (info & SVM_EXIT_IO_A64) { 909 exit->u.io.address_size = 8; 910 } else if (info & SVM_EXIT_IO_A32) { 911 exit->u.io.address_size = 4; 912 } else if (info & SVM_EXIT_IO_A16) { 913 exit->u.io.address_size = 2; 914 } 915 916 if (info & SVM_EXIT_IO_SZ32) { 917 exit->u.io.operand_size = 4; 918 } else if (info & SVM_EXIT_IO_SZ16) { 919 exit->u.io.operand_size = 2; 920 } else if (info & SVM_EXIT_IO_SZ8) { 921 exit->u.io.operand_size = 1; 922 } 923 924 exit->u.io.rep = (info & SVM_EXIT_IO_REP) != 0; 925 exit->u.io.str = (info & SVM_EXIT_IO_STR) != 0; 926 exit->u.io.npc = nextpc; 927 } 928 929 static const uint64_t msr_ignore_list[] = { 930 0xc0010055, /* MSR_CMPHALT */ 931 MSR_DE_CFG, 932 MSR_IC_CFG, 933 MSR_UCODE_AMD_PATCHLEVEL 934 }; 935 936 static bool 937 svm_inkernel_handle_msr(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 938 struct nvmm_exit *exit) 939 { 940 struct svm_cpudata *cpudata = vcpu->cpudata; 941 struct vmcb *vmcb = cpudata->vmcb; 942 uint64_t val; 943 size_t i; 944 945 switch (exit->u.msr.type) { 946 case NVMM_EXIT_MSR_RDMSR: 947 if (exit->u.msr.msr == MSR_NB_CFG) { 948 val = NB_CFG_INITAPICCPUIDLO; 949 vmcb->state.rax = (val & 0xFFFFFFFF); 950 cpudata->gprs[NVMM_X64_GPR_RDX] = (val >> 32); 951 goto handled; 952 } 953 for (i = 0; i < __arraycount(msr_ignore_list); i++) { 954 if (msr_ignore_list[i] != exit->u.msr.msr) 955 continue; 956 val = 0; 957 vmcb->state.rax = (val & 0xFFFFFFFF); 958 cpudata->gprs[NVMM_X64_GPR_RDX] = (val >> 32); 959 goto handled; 960 } 961 break; 962 case NVMM_EXIT_MSR_WRMSR: 963 if (exit->u.msr.msr == MSR_EFER) { 964 if (__predict_false(exit->u.msr.val & ~EFER_VALID)) { 965 goto error; 966 } 967 if ((vmcb->state.efer ^ exit->u.msr.val) & 968 EFER_TLB_FLUSH) { 969 cpudata->tlb_want_flush = true; 970 } 971 vmcb->state.efer = exit->u.msr.val | EFER_SVME; 972 vmcb->ctrl.vmcb_clean &= ~VMCB_CTRL_VMCB_CLEAN_CR; 973 goto handled; 974 } 975 for (i = 0; i < __arraycount(msr_ignore_list); i++) { 976 if (msr_ignore_list[i] != exit->u.msr.msr) 977 continue; 978 goto handled; 979 } 980 break; 981 } 982 983 return false; 984 985 handled: 986 svm_inkernel_advance(cpudata->vmcb); 987 return true; 988 989 error: 990 svm_inject_gp(mach, vcpu); 991 return true; 992 } 993 994 static void 995 svm_exit_msr(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 996 struct nvmm_exit *exit) 997 { 998 struct svm_cpudata *cpudata = vcpu->cpudata; 999 uint64_t info = cpudata->vmcb->ctrl.exitinfo1; 1000 1001 if (info == 0) { 1002 exit->u.msr.type = NVMM_EXIT_MSR_RDMSR; 1003 } else { 1004 exit->u.msr.type = NVMM_EXIT_MSR_WRMSR; 1005 } 1006 1007 exit->u.msr.msr = (cpudata->gprs[NVMM_X64_GPR_RCX] & 0xFFFFFFFF); 1008 1009 if (info == 1) { 1010 uint64_t rdx, rax; 1011 rdx = cpudata->gprs[NVMM_X64_GPR_RDX]; 1012 rax = cpudata->vmcb->state.rax; 1013 exit->u.msr.val = (rdx << 32) | (rax & 0xFFFFFFFF); 1014 } else { 1015 exit->u.msr.val = 0; 1016 } 1017 1018 if (svm_inkernel_handle_msr(mach, vcpu, exit)) { 1019 exit->reason = NVMM_EXIT_NONE; 1020 return; 1021 } 1022 1023 exit->reason = NVMM_EXIT_MSR; 1024 exit->u.msr.npc = cpudata->vmcb->ctrl.nrip; 1025 } 1026 1027 static void 1028 svm_exit_npf(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 1029 struct nvmm_exit *exit) 1030 { 1031 struct svm_cpudata *cpudata = vcpu->cpudata; 1032 gpaddr_t gpa = cpudata->vmcb->ctrl.exitinfo2; 1033 int error; 1034 1035 error = uvm_fault(&mach->vm->vm_map, gpa, VM_PROT_ALL); 1036 1037 if (error) { 1038 exit->reason = NVMM_EXIT_MEMORY; 1039 if (cpudata->vmcb->ctrl.exitinfo1 & PGEX_W) 1040 exit->u.mem.perm = NVMM_EXIT_MEMORY_WRITE; 1041 else if (cpudata->vmcb->ctrl.exitinfo1 & PGEX_X) 1042 exit->u.mem.perm = NVMM_EXIT_MEMORY_EXEC; 1043 else 1044 exit->u.mem.perm = NVMM_EXIT_MEMORY_READ; 1045 exit->u.mem.gpa = gpa; 1046 exit->u.mem.inst_len = cpudata->vmcb->ctrl.inst_len; 1047 memcpy(exit->u.mem.inst_bytes, cpudata->vmcb->ctrl.inst_bytes, 1048 sizeof(exit->u.mem.inst_bytes)); 1049 } else { 1050 exit->reason = NVMM_EXIT_NONE; 1051 } 1052 } 1053 1054 static void 1055 svm_exit_insn(struct vmcb *vmcb, struct nvmm_exit *exit, uint64_t reason) 1056 { 1057 exit->u.insn.npc = vmcb->ctrl.nrip; 1058 exit->reason = reason; 1059 } 1060 1061 static void 1062 svm_exit_xsetbv(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 1063 struct nvmm_exit *exit) 1064 { 1065 struct svm_cpudata *cpudata = vcpu->cpudata; 1066 struct vmcb *vmcb = cpudata->vmcb; 1067 uint64_t val; 1068 1069 exit->reason = NVMM_EXIT_NONE; 1070 1071 val = (cpudata->gprs[NVMM_X64_GPR_RDX] << 32) | 1072 (vmcb->state.rax & 0xFFFFFFFF); 1073 1074 if (__predict_false(cpudata->gprs[NVMM_X64_GPR_RCX] != 0)) { 1075 goto error; 1076 } else if (__predict_false(vmcb->state.cpl != 0)) { 1077 goto error; 1078 } else if (__predict_false((val & ~svm_xcr0_mask) != 0)) { 1079 goto error; 1080 } else if (__predict_false((val & XCR0_X87) == 0)) { 1081 goto error; 1082 } 1083 1084 cpudata->gxcr0 = val; 1085 1086 svm_inkernel_advance(cpudata->vmcb); 1087 return; 1088 1089 error: 1090 svm_inject_gp(mach, vcpu); 1091 } 1092 1093 static void 1094 svm_vcpu_guest_fpu_enter(struct nvmm_cpu *vcpu) 1095 { 1096 struct svm_cpudata *cpudata = vcpu->cpudata; 1097 1098 cpudata->ts_set = (rcr0() & CR0_TS) != 0; 1099 1100 fpu_area_save(&cpudata->hfpu, svm_xcr0_mask); 1101 fpu_area_restore(&cpudata->gfpu, svm_xcr0_mask); 1102 1103 if (svm_xcr0_mask != 0) { 1104 cpudata->hxcr0 = rdxcr(0); 1105 wrxcr(0, cpudata->gxcr0); 1106 } 1107 } 1108 1109 static void 1110 svm_vcpu_guest_fpu_leave(struct nvmm_cpu *vcpu) 1111 { 1112 struct svm_cpudata *cpudata = vcpu->cpudata; 1113 1114 if (svm_xcr0_mask != 0) { 1115 cpudata->gxcr0 = rdxcr(0); 1116 wrxcr(0, cpudata->hxcr0); 1117 } 1118 1119 fpu_area_save(&cpudata->gfpu, svm_xcr0_mask); 1120 fpu_area_restore(&cpudata->hfpu, svm_xcr0_mask); 1121 1122 if (cpudata->ts_set) { 1123 stts(); 1124 } 1125 } 1126 1127 static void 1128 svm_vcpu_guest_dbregs_enter(struct nvmm_cpu *vcpu) 1129 { 1130 struct svm_cpudata *cpudata = vcpu->cpudata; 1131 1132 x86_dbregs_save(curlwp); 1133 1134 ldr7(0); 1135 1136 ldr0(cpudata->drs[NVMM_X64_DR_DR0]); 1137 ldr1(cpudata->drs[NVMM_X64_DR_DR1]); 1138 ldr2(cpudata->drs[NVMM_X64_DR_DR2]); 1139 ldr3(cpudata->drs[NVMM_X64_DR_DR3]); 1140 } 1141 1142 static void 1143 svm_vcpu_guest_dbregs_leave(struct nvmm_cpu *vcpu) 1144 { 1145 struct svm_cpudata *cpudata = vcpu->cpudata; 1146 1147 cpudata->drs[NVMM_X64_DR_DR0] = rdr0(); 1148 cpudata->drs[NVMM_X64_DR_DR1] = rdr1(); 1149 cpudata->drs[NVMM_X64_DR_DR2] = rdr2(); 1150 cpudata->drs[NVMM_X64_DR_DR3] = rdr3(); 1151 1152 x86_dbregs_restore(curlwp); 1153 } 1154 1155 static void 1156 svm_vcpu_guest_misc_enter(struct nvmm_cpu *vcpu) 1157 { 1158 struct svm_cpudata *cpudata = vcpu->cpudata; 1159 1160 cpudata->star = rdmsr(MSR_STAR); 1161 cpudata->lstar = rdmsr(MSR_LSTAR); 1162 cpudata->cstar = rdmsr(MSR_CSTAR); 1163 cpudata->sfmask = rdmsr(MSR_SFMASK); 1164 cpudata->fsbase = rdmsr(MSR_FSBASE); 1165 cpudata->kernelgsbase = rdmsr(MSR_KERNELGSBASE); 1166 } 1167 1168 static void 1169 svm_vcpu_guest_misc_leave(struct nvmm_cpu *vcpu) 1170 { 1171 struct svm_cpudata *cpudata = vcpu->cpudata; 1172 1173 wrmsr(MSR_STAR, cpudata->star); 1174 wrmsr(MSR_LSTAR, cpudata->lstar); 1175 wrmsr(MSR_CSTAR, cpudata->cstar); 1176 wrmsr(MSR_SFMASK, cpudata->sfmask); 1177 wrmsr(MSR_FSBASE, cpudata->fsbase); 1178 wrmsr(MSR_KERNELGSBASE, cpudata->kernelgsbase); 1179 } 1180 1181 static int 1182 svm_vcpu_run(struct nvmm_machine *mach, struct nvmm_cpu *vcpu, 1183 struct nvmm_exit *exit) 1184 { 1185 struct svm_cpudata *cpudata = vcpu->cpudata; 1186 struct vmcb *vmcb = cpudata->vmcb; 1187 bool tlb_need_flush = false; 1188 int hcpu, s; 1189 1190 kpreempt_disable(); 1191 hcpu = cpu_number(); 1192 1193 if (vcpu->hcpu_last != hcpu || cpudata->shared_asid) { 1194 tlb_need_flush = true; 1195 } 1196 1197 if (vcpu->hcpu_last != hcpu) { 1198 vmcb->ctrl.tsc_offset = cpudata->tsc_offset + 1199 curcpu()->ci_data.cpu_cc_skew; 1200 svm_vmcb_cache_flush_all(vmcb); 1201 } 1202 1203 svm_vcpu_guest_dbregs_enter(vcpu); 1204 svm_vcpu_guest_misc_enter(vcpu); 1205 1206 while (1) { 1207 if (cpudata->tlb_want_flush || tlb_need_flush) { 1208 vmcb->ctrl.tlb_ctrl = svm_ctrl_tlb_flush; 1209 } else { 1210 vmcb->ctrl.tlb_ctrl = 0; 1211 } 1212 1213 s = splhigh(); 1214 svm_vcpu_guest_fpu_enter(vcpu); 1215 svm_vmrun(cpudata->vmcb_pa, cpudata->gprs); 1216 svm_vcpu_guest_fpu_leave(vcpu); 1217 splx(s); 1218 1219 svm_vmcb_cache_default(vmcb); 1220 1221 if (vmcb->ctrl.exitcode != VMCB_EXITCODE_INVALID) { 1222 cpudata->tlb_want_flush = false; 1223 tlb_need_flush = false; 1224 vcpu->hcpu_last = hcpu; 1225 } 1226 1227 switch (vmcb->ctrl.exitcode) { 1228 case VMCB_EXITCODE_INTR: 1229 case VMCB_EXITCODE_NMI: 1230 exit->reason = NVMM_EXIT_NONE; 1231 break; 1232 case VMCB_EXITCODE_VINTR: 1233 svm_event_waitexit_disable(vcpu, false); 1234 exit->reason = NVMM_EXIT_INT_READY; 1235 break; 1236 case VMCB_EXITCODE_IRET: 1237 svm_event_waitexit_disable(vcpu, true); 1238 exit->reason = NVMM_EXIT_NMI_READY; 1239 break; 1240 case VMCB_EXITCODE_CPUID: 1241 svm_exit_cpuid(mach, vcpu, exit); 1242 break; 1243 case VMCB_EXITCODE_HLT: 1244 svm_exit_hlt(mach, vcpu, exit); 1245 break; 1246 case VMCB_EXITCODE_IOIO: 1247 svm_exit_io(mach, vcpu, exit); 1248 break; 1249 case VMCB_EXITCODE_MSR: 1250 svm_exit_msr(mach, vcpu, exit); 1251 break; 1252 case VMCB_EXITCODE_SHUTDOWN: 1253 exit->reason = NVMM_EXIT_SHUTDOWN; 1254 break; 1255 case VMCB_EXITCODE_RDPMC: 1256 case VMCB_EXITCODE_RSM: 1257 case VMCB_EXITCODE_INVLPGA: 1258 case VMCB_EXITCODE_VMRUN: 1259 case VMCB_EXITCODE_VMMCALL: 1260 case VMCB_EXITCODE_VMLOAD: 1261 case VMCB_EXITCODE_VMSAVE: 1262 case VMCB_EXITCODE_STGI: 1263 case VMCB_EXITCODE_CLGI: 1264 case VMCB_EXITCODE_SKINIT: 1265 case VMCB_EXITCODE_RDTSCP: 1266 svm_inject_ud(mach, vcpu); 1267 exit->reason = NVMM_EXIT_NONE; 1268 break; 1269 case VMCB_EXITCODE_MONITOR: 1270 svm_exit_insn(vmcb, exit, NVMM_EXIT_MONITOR); 1271 break; 1272 case VMCB_EXITCODE_MWAIT: 1273 svm_exit_insn(vmcb, exit, NVMM_EXIT_MWAIT); 1274 break; 1275 case VMCB_EXITCODE_MWAIT_CONDITIONAL: 1276 svm_exit_insn(vmcb, exit, NVMM_EXIT_MWAIT_COND); 1277 break; 1278 case VMCB_EXITCODE_XSETBV: 1279 svm_exit_xsetbv(mach, vcpu, exit); 1280 break; 1281 case VMCB_EXITCODE_NPF: 1282 svm_exit_npf(mach, vcpu, exit); 1283 break; 1284 case VMCB_EXITCODE_FERR_FREEZE: /* ? */ 1285 default: 1286 exit->reason = NVMM_EXIT_INVALID; 1287 break; 1288 } 1289 1290 /* If no reason to return to userland, keep rolling. */ 1291 if (curcpu()->ci_schedstate.spc_flags & SPCF_SHOULDYIELD) { 1292 break; 1293 } 1294 if (curcpu()->ci_data.cpu_softints != 0) { 1295 break; 1296 } 1297 if (curlwp->l_flag & LW_USERRET) { 1298 break; 1299 } 1300 if (exit->reason != NVMM_EXIT_NONE) { 1301 break; 1302 } 1303 } 1304 1305 svm_vcpu_guest_misc_leave(vcpu); 1306 svm_vcpu_guest_dbregs_leave(vcpu); 1307 1308 kpreempt_enable(); 1309 1310 exit->exitstate[NVMM_X64_EXITSTATE_CR8] = __SHIFTOUT(vmcb->ctrl.v, 1311 VMCB_CTRL_V_TPR); 1312 exit->exitstate[NVMM_X64_EXITSTATE_RFLAGS] = vmcb->state.rflags; 1313 1314 exit->exitstate[NVMM_X64_EXITSTATE_INT_SHADOW] = 1315 ((vmcb->ctrl.intr & VMCB_CTRL_INTR_SHADOW) != 0); 1316 exit->exitstate[NVMM_X64_EXITSTATE_INT_WINDOW_EXIT] = 1317 cpudata->int_window_exit; 1318 exit->exitstate[NVMM_X64_EXITSTATE_NMI_WINDOW_EXIT] = 1319 cpudata->nmi_window_exit; 1320 1321 return 0; 1322 } 1323 1324 /* -------------------------------------------------------------------------- */ 1325 1326 static int 1327 svm_memalloc(paddr_t *pa, vaddr_t *va, size_t npages) 1328 { 1329 struct pglist pglist; 1330 paddr_t _pa; 1331 vaddr_t _va; 1332 size_t i; 1333 int ret; 1334 1335 ret = uvm_pglistalloc(npages * PAGE_SIZE, 0, ~0UL, PAGE_SIZE, 0, 1336 &pglist, 1, 0); 1337 if (ret != 0) 1338 return ENOMEM; 1339 _pa = TAILQ_FIRST(&pglist)->phys_addr; 1340 _va = uvm_km_alloc(kernel_map, npages * PAGE_SIZE, 0, 1341 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 1342 if (_va == 0) 1343 goto error; 1344 1345 for (i = 0; i < npages; i++) { 1346 pmap_kenter_pa(_va + i * PAGE_SIZE, _pa + i * PAGE_SIZE, 1347 VM_PROT_READ | VM_PROT_WRITE, PMAP_WRITE_BACK); 1348 } 1349 pmap_update(pmap_kernel()); 1350 1351 memset((void *)_va, 0, npages * PAGE_SIZE); 1352 1353 *pa = _pa; 1354 *va = _va; 1355 return 0; 1356 1357 error: 1358 for (i = 0; i < npages; i++) { 1359 uvm_pagefree(PHYS_TO_VM_PAGE(_pa + i * PAGE_SIZE)); 1360 } 1361 return ENOMEM; 1362 } 1363 1364 static void 1365 svm_memfree(paddr_t pa, vaddr_t va, size_t npages) 1366 { 1367 size_t i; 1368 1369 pmap_kremove(va, npages * PAGE_SIZE); 1370 pmap_update(pmap_kernel()); 1371 uvm_km_free(kernel_map, va, npages * PAGE_SIZE, UVM_KMF_VAONLY); 1372 for (i = 0; i < npages; i++) { 1373 uvm_pagefree(PHYS_TO_VM_PAGE(pa + i * PAGE_SIZE)); 1374 } 1375 } 1376 1377 /* -------------------------------------------------------------------------- */ 1378 1379 #define SVM_MSRBM_READ __BIT(0) 1380 #define SVM_MSRBM_WRITE __BIT(1) 1381 1382 static void 1383 svm_vcpu_msr_allow(uint8_t *bitmap, uint64_t msr, bool read, bool write) 1384 { 1385 uint64_t byte; 1386 uint8_t bitoff; 1387 1388 if (msr < 0x00002000) { 1389 /* Range 1 */ 1390 byte = ((msr - 0x00000000) >> 2UL) + 0x0000; 1391 } else if (msr >= 0xC0000000 && msr < 0xC0002000) { 1392 /* Range 2 */ 1393 byte = ((msr - 0xC0000000) >> 2UL) + 0x0800; 1394 } else if (msr >= 0xC0010000 && msr < 0xC0012000) { 1395 /* Range 3 */ 1396 byte = ((msr - 0xC0010000) >> 2UL) + 0x1000; 1397 } else { 1398 panic("%s: wrong range", __func__); 1399 } 1400 1401 bitoff = (msr & 0x3) << 1; 1402 1403 if (read) { 1404 bitmap[byte] &= ~(SVM_MSRBM_READ << bitoff); 1405 } 1406 if (write) { 1407 bitmap[byte] &= ~(SVM_MSRBM_WRITE << bitoff); 1408 } 1409 } 1410 1411 static void 1412 svm_asid_alloc(struct nvmm_cpu *vcpu) 1413 { 1414 struct svm_cpudata *cpudata = vcpu->cpudata; 1415 struct vmcb *vmcb = cpudata->vmcb; 1416 size_t i, oct, bit; 1417 1418 mutex_enter(&svm_asidlock); 1419 1420 for (i = 0; i < svm_maxasid; i++) { 1421 oct = i / 8; 1422 bit = i % 8; 1423 1424 if (svm_asidmap[oct] & __BIT(bit)) { 1425 continue; 1426 } 1427 1428 svm_asidmap[oct] |= __BIT(bit); 1429 vmcb->ctrl.guest_asid = i; 1430 mutex_exit(&svm_asidlock); 1431 return; 1432 } 1433 1434 /* 1435 * No free ASID. Use the last one, which is shared and requires 1436 * special TLB handling. 1437 */ 1438 cpudata->shared_asid = true; 1439 vmcb->ctrl.guest_asid = svm_maxasid - 1; 1440 mutex_exit(&svm_asidlock); 1441 } 1442 1443 static void 1444 svm_asid_free(struct nvmm_cpu *vcpu) 1445 { 1446 struct svm_cpudata *cpudata = vcpu->cpudata; 1447 struct vmcb *vmcb = cpudata->vmcb; 1448 size_t oct, bit; 1449 1450 if (cpudata->shared_asid) { 1451 return; 1452 } 1453 1454 oct = vmcb->ctrl.guest_asid / 8; 1455 bit = vmcb->ctrl.guest_asid % 8; 1456 1457 mutex_enter(&svm_asidlock); 1458 svm_asidmap[oct] &= ~__BIT(bit); 1459 mutex_exit(&svm_asidlock); 1460 } 1461 1462 static void 1463 svm_vcpu_init(struct nvmm_machine *mach, struct nvmm_cpu *vcpu) 1464 { 1465 struct svm_cpudata *cpudata = vcpu->cpudata; 1466 struct vmcb *vmcb = cpudata->vmcb; 1467 1468 /* Allow reads/writes of Control Registers. */ 1469 vmcb->ctrl.intercept_cr = 0; 1470 1471 /* Allow reads/writes of Debug Registers. */ 1472 vmcb->ctrl.intercept_dr = 0; 1473 1474 /* Allow exceptions 0 to 31. */ 1475 vmcb->ctrl.intercept_vec = 0; 1476 1477 /* 1478 * Allow: 1479 * - SMI [smm interrupts] 1480 * - VINTR [virtual interrupts] 1481 * - CR0_SPEC [CR0 writes changing other fields than CR0.TS or CR0.MP] 1482 * - RIDTR [reads of IDTR] 1483 * - RGDTR [reads of GDTR] 1484 * - RLDTR [reads of LDTR] 1485 * - RTR [reads of TR] 1486 * - WIDTR [writes of IDTR] 1487 * - WGDTR [writes of GDTR] 1488 * - WLDTR [writes of LDTR] 1489 * - WTR [writes of TR] 1490 * - RDTSC [rdtsc instruction] 1491 * - PUSHF [pushf instruction] 1492 * - POPF [popf instruction] 1493 * - IRET [iret instruction] 1494 * - INTN [int $n instructions] 1495 * - INVD [invd instruction] 1496 * - PAUSE [pause instruction] 1497 * - INVLPG [invplg instruction] 1498 * - TASKSW [task switches] 1499 * 1500 * Intercept the rest below. 1501 */ 1502 vmcb->ctrl.intercept_misc1 = 1503 VMCB_CTRL_INTERCEPT_INTR | 1504 VMCB_CTRL_INTERCEPT_NMI | 1505 VMCB_CTRL_INTERCEPT_INIT | 1506 VMCB_CTRL_INTERCEPT_RDPMC | 1507 VMCB_CTRL_INTERCEPT_CPUID | 1508 VMCB_CTRL_INTERCEPT_RSM | 1509 VMCB_CTRL_INTERCEPT_HLT | 1510 VMCB_CTRL_INTERCEPT_INVLPGA | 1511 VMCB_CTRL_INTERCEPT_IOIO_PROT | 1512 VMCB_CTRL_INTERCEPT_MSR_PROT | 1513 VMCB_CTRL_INTERCEPT_FERR_FREEZE | 1514 VMCB_CTRL_INTERCEPT_SHUTDOWN; 1515 1516 /* 1517 * Allow: 1518 * - ICEBP [icebp instruction] 1519 * - WBINVD [wbinvd instruction] 1520 * - WCR_SPEC(0..15) [writes of CR0-15, received after instruction] 1521 * 1522 * Intercept the rest below. 1523 */ 1524 vmcb->ctrl.intercept_misc2 = 1525 VMCB_CTRL_INTERCEPT_VMRUN | 1526 VMCB_CTRL_INTERCEPT_VMMCALL | 1527 VMCB_CTRL_INTERCEPT_VMLOAD | 1528 VMCB_CTRL_INTERCEPT_VMSAVE | 1529 VMCB_CTRL_INTERCEPT_STGI | 1530 VMCB_CTRL_INTERCEPT_CLGI | 1531 VMCB_CTRL_INTERCEPT_SKINIT | 1532 VMCB_CTRL_INTERCEPT_RDTSCP | 1533 VMCB_CTRL_INTERCEPT_MONITOR | 1534 VMCB_CTRL_INTERCEPT_MWAIT | 1535 VMCB_CTRL_INTERCEPT_XSETBV; 1536 1537 /* Intercept all I/O accesses. */ 1538 memset(cpudata->iobm, 0xFF, IOBM_SIZE); 1539 vmcb->ctrl.iopm_base_pa = cpudata->iobm_pa; 1540 1541 /* 1542 * Allow: 1543 * - EFER [read] 1544 * - STAR [read, write] 1545 * - LSTAR [read, write] 1546 * - CSTAR [read, write] 1547 * - SFMASK [read, write] 1548 * - KERNELGSBASE [read, write] 1549 * - SYSENTER_CS [read, write] 1550 * - SYSENTER_ESP [read, write] 1551 * - SYSENTER_EIP [read, write] 1552 * - FSBASE [read, write] 1553 * - GSBASE [read, write] 1554 * - PAT [read, write] 1555 * - TSC [read] 1556 * 1557 * Intercept the rest. 1558 */ 1559 memset(cpudata->msrbm, 0xFF, MSRBM_SIZE); 1560 svm_vcpu_msr_allow(cpudata->msrbm, MSR_EFER, true, false); 1561 svm_vcpu_msr_allow(cpudata->msrbm, MSR_STAR, true, true); 1562 svm_vcpu_msr_allow(cpudata->msrbm, MSR_LSTAR, true, true); 1563 svm_vcpu_msr_allow(cpudata->msrbm, MSR_CSTAR, true, true); 1564 svm_vcpu_msr_allow(cpudata->msrbm, MSR_SFMASK, true, true); 1565 svm_vcpu_msr_allow(cpudata->msrbm, MSR_KERNELGSBASE, true, true); 1566 svm_vcpu_msr_allow(cpudata->msrbm, MSR_SYSENTER_CS, true, true); 1567 svm_vcpu_msr_allow(cpudata->msrbm, MSR_SYSENTER_ESP, true, true); 1568 svm_vcpu_msr_allow(cpudata->msrbm, MSR_SYSENTER_EIP, true, true); 1569 svm_vcpu_msr_allow(cpudata->msrbm, MSR_FSBASE, true, true); 1570 svm_vcpu_msr_allow(cpudata->msrbm, MSR_GSBASE, true, true); 1571 svm_vcpu_msr_allow(cpudata->msrbm, MSR_CR_PAT, true, true); 1572 svm_vcpu_msr_allow(cpudata->msrbm, MSR_TSC, true, false); 1573 vmcb->ctrl.msrpm_base_pa = cpudata->msrbm_pa; 1574 1575 /* Generate ASID. */ 1576 svm_asid_alloc(vcpu); 1577 1578 /* Virtual TPR. */ 1579 vmcb->ctrl.v = VMCB_CTRL_V_INTR_MASKING; 1580 1581 /* Enable Nested Paging. */ 1582 vmcb->ctrl.enable1 = VMCB_CTRL_ENABLE_NP; 1583 vmcb->ctrl.n_cr3 = mach->vm->vm_map.pmap->pm_pdirpa[0]; 1584 1585 /* Must always be set. */ 1586 vmcb->state.efer = EFER_SVME; 1587 cpudata->gxcr0 = XCR0_X87; 1588 1589 /* Init XSAVE header. */ 1590 cpudata->gfpu.xsh_xstate_bv = svm_xcr0_mask; 1591 cpudata->gfpu.xsh_xcomp_bv = 0; 1592 1593 /* Bluntly hide the host TSC. */ 1594 cpudata->tsc_offset = rdtsc(); 1595 } 1596 1597 static int 1598 svm_vcpu_create(struct nvmm_machine *mach, struct nvmm_cpu *vcpu) 1599 { 1600 struct svm_cpudata *cpudata; 1601 int error; 1602 1603 /* Allocate the SVM cpudata. */ 1604 cpudata = (struct svm_cpudata *)uvm_km_alloc(kernel_map, 1605 roundup(sizeof(*cpudata), PAGE_SIZE), 0, 1606 UVM_KMF_WIRED|UVM_KMF_ZERO); 1607 vcpu->cpudata = cpudata; 1608 1609 /* VMCB */ 1610 error = svm_memalloc(&cpudata->vmcb_pa, (vaddr_t *)&cpudata->vmcb, 1611 VMCB_NPAGES); 1612 if (error) 1613 goto error; 1614 1615 /* I/O Bitmap */ 1616 error = svm_memalloc(&cpudata->iobm_pa, (vaddr_t *)&cpudata->iobm, 1617 IOBM_NPAGES); 1618 if (error) 1619 goto error; 1620 1621 /* MSR Bitmap */ 1622 error = svm_memalloc(&cpudata->msrbm_pa, (vaddr_t *)&cpudata->msrbm, 1623 MSRBM_NPAGES); 1624 if (error) 1625 goto error; 1626 1627 /* Init the VCPU info. */ 1628 svm_vcpu_init(mach, vcpu); 1629 1630 return 0; 1631 1632 error: 1633 if (cpudata->vmcb_pa) { 1634 svm_memfree(cpudata->vmcb_pa, (vaddr_t)cpudata->vmcb, 1635 VMCB_NPAGES); 1636 } 1637 if (cpudata->iobm_pa) { 1638 svm_memfree(cpudata->iobm_pa, (vaddr_t)cpudata->iobm, 1639 IOBM_NPAGES); 1640 } 1641 if (cpudata->msrbm_pa) { 1642 svm_memfree(cpudata->msrbm_pa, (vaddr_t)cpudata->msrbm, 1643 MSRBM_NPAGES); 1644 } 1645 uvm_km_free(kernel_map, (vaddr_t)cpudata, 1646 roundup(sizeof(*cpudata), PAGE_SIZE), UVM_KMF_WIRED); 1647 return error; 1648 } 1649 1650 static void 1651 svm_vcpu_destroy(struct nvmm_machine *mach, struct nvmm_cpu *vcpu) 1652 { 1653 struct svm_cpudata *cpudata = vcpu->cpudata; 1654 1655 svm_asid_free(vcpu); 1656 1657 svm_memfree(cpudata->vmcb_pa, (vaddr_t)cpudata->vmcb, VMCB_NPAGES); 1658 svm_memfree(cpudata->iobm_pa, (vaddr_t)cpudata->iobm, IOBM_NPAGES); 1659 svm_memfree(cpudata->msrbm_pa, (vaddr_t)cpudata->msrbm, MSRBM_NPAGES); 1660 1661 uvm_km_free(kernel_map, (vaddr_t)cpudata, 1662 roundup(sizeof(*cpudata), PAGE_SIZE), UVM_KMF_WIRED); 1663 } 1664 1665 #define SVM_SEG_ATTRIB_TYPE __BITS(4,0) 1666 #define SVM_SEG_ATTRIB_DPL __BITS(6,5) 1667 #define SVM_SEG_ATTRIB_P __BIT(7) 1668 #define SVM_SEG_ATTRIB_AVL __BIT(8) 1669 #define SVM_SEG_ATTRIB_LONG __BIT(9) 1670 #define SVM_SEG_ATTRIB_DEF32 __BIT(10) 1671 #define SVM_SEG_ATTRIB_GRAN __BIT(11) 1672 1673 static void 1674 svm_vcpu_setstate_seg(struct nvmm_x64_state_seg *seg, struct vmcb_segment *vseg) 1675 { 1676 vseg->selector = seg->selector; 1677 vseg->attrib = 1678 __SHIFTIN(seg->attrib.type, SVM_SEG_ATTRIB_TYPE) | 1679 __SHIFTIN(seg->attrib.dpl, SVM_SEG_ATTRIB_DPL) | 1680 __SHIFTIN(seg->attrib.p, SVM_SEG_ATTRIB_P) | 1681 __SHIFTIN(seg->attrib.avl, SVM_SEG_ATTRIB_AVL) | 1682 __SHIFTIN(seg->attrib.lng, SVM_SEG_ATTRIB_LONG) | 1683 __SHIFTIN(seg->attrib.def32, SVM_SEG_ATTRIB_DEF32) | 1684 __SHIFTIN(seg->attrib.gran, SVM_SEG_ATTRIB_GRAN); 1685 vseg->limit = seg->limit; 1686 vseg->base = seg->base; 1687 } 1688 1689 static void 1690 svm_vcpu_getstate_seg(struct nvmm_x64_state_seg *seg, struct vmcb_segment *vseg) 1691 { 1692 seg->selector = vseg->selector; 1693 seg->attrib.type = __SHIFTOUT(vseg->attrib, SVM_SEG_ATTRIB_TYPE); 1694 seg->attrib.dpl = __SHIFTOUT(vseg->attrib, SVM_SEG_ATTRIB_DPL); 1695 seg->attrib.p = __SHIFTOUT(vseg->attrib, SVM_SEG_ATTRIB_P); 1696 seg->attrib.avl = __SHIFTOUT(vseg->attrib, SVM_SEG_ATTRIB_AVL); 1697 seg->attrib.lng = __SHIFTOUT(vseg->attrib, SVM_SEG_ATTRIB_LONG); 1698 seg->attrib.def32 = __SHIFTOUT(vseg->attrib, SVM_SEG_ATTRIB_DEF32); 1699 seg->attrib.gran = __SHIFTOUT(vseg->attrib, SVM_SEG_ATTRIB_GRAN); 1700 seg->limit = vseg->limit; 1701 seg->base = vseg->base; 1702 } 1703 1704 static inline bool 1705 svm_state_tlb_flush(struct vmcb *vmcb, struct nvmm_x64_state *state, 1706 uint64_t flags) 1707 { 1708 if (flags & NVMM_X64_STATE_CRS) { 1709 if ((vmcb->state.cr0 ^ 1710 state->crs[NVMM_X64_CR_CR0]) & CR0_TLB_FLUSH) { 1711 return true; 1712 } 1713 if (vmcb->state.cr3 != state->crs[NVMM_X64_CR_CR3]) { 1714 return true; 1715 } 1716 if ((vmcb->state.cr4 ^ 1717 state->crs[NVMM_X64_CR_CR4]) & CR4_TLB_FLUSH) { 1718 return true; 1719 } 1720 } 1721 1722 if (flags & NVMM_X64_STATE_MSRS) { 1723 if ((vmcb->state.efer ^ 1724 state->msrs[NVMM_X64_MSR_EFER]) & EFER_TLB_FLUSH) { 1725 return true; 1726 } 1727 } 1728 1729 return false; 1730 } 1731 1732 static void 1733 svm_vcpu_setstate(struct nvmm_cpu *vcpu, void *data, uint64_t flags) 1734 { 1735 struct nvmm_x64_state *state = (struct nvmm_x64_state *)data; 1736 struct svm_cpudata *cpudata = vcpu->cpudata; 1737 struct vmcb *vmcb = cpudata->vmcb; 1738 struct fxsave *fpustate; 1739 1740 if (svm_state_tlb_flush(vmcb, state, flags)) { 1741 cpudata->tlb_want_flush = true; 1742 } 1743 1744 if (flags & NVMM_X64_STATE_SEGS) { 1745 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_CS], 1746 &vmcb->state.cs); 1747 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_DS], 1748 &vmcb->state.ds); 1749 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_ES], 1750 &vmcb->state.es); 1751 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_FS], 1752 &vmcb->state.fs); 1753 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_GS], 1754 &vmcb->state.gs); 1755 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_SS], 1756 &vmcb->state.ss); 1757 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_GDT], 1758 &vmcb->state.gdt); 1759 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_IDT], 1760 &vmcb->state.idt); 1761 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_LDT], 1762 &vmcb->state.ldt); 1763 svm_vcpu_setstate_seg(&state->segs[NVMM_X64_SEG_TR], 1764 &vmcb->state.tr); 1765 } 1766 1767 CTASSERT(sizeof(cpudata->gprs) == sizeof(state->gprs)); 1768 if (flags & NVMM_X64_STATE_GPRS) { 1769 memcpy(cpudata->gprs, state->gprs, sizeof(state->gprs)); 1770 1771 vmcb->state.rip = state->gprs[NVMM_X64_GPR_RIP]; 1772 vmcb->state.rsp = state->gprs[NVMM_X64_GPR_RSP]; 1773 vmcb->state.rax = state->gprs[NVMM_X64_GPR_RAX]; 1774 vmcb->state.rflags = state->gprs[NVMM_X64_GPR_RFLAGS]; 1775 } 1776 1777 if (flags & NVMM_X64_STATE_CRS) { 1778 vmcb->state.cr0 = state->crs[NVMM_X64_CR_CR0]; 1779 vmcb->state.cr2 = state->crs[NVMM_X64_CR_CR2]; 1780 vmcb->state.cr3 = state->crs[NVMM_X64_CR_CR3]; 1781 vmcb->state.cr4 = state->crs[NVMM_X64_CR_CR4]; 1782 1783 vmcb->ctrl.v &= ~VMCB_CTRL_V_TPR; 1784 vmcb->ctrl.v |= __SHIFTIN(state->crs[NVMM_X64_CR_CR8], 1785 VMCB_CTRL_V_TPR); 1786 1787 if (svm_xcr0_mask != 0) { 1788 /* Clear illegal XCR0 bits, set mandatory X87 bit. */ 1789 cpudata->gxcr0 = state->crs[NVMM_X64_CR_XCR0]; 1790 cpudata->gxcr0 &= svm_xcr0_mask; 1791 cpudata->gxcr0 |= XCR0_X87; 1792 } 1793 } 1794 1795 CTASSERT(sizeof(cpudata->drs) == sizeof(state->drs)); 1796 if (flags & NVMM_X64_STATE_DRS) { 1797 memcpy(cpudata->drs, state->drs, sizeof(state->drs)); 1798 1799 vmcb->state.dr6 = state->drs[NVMM_X64_DR_DR6]; 1800 vmcb->state.dr7 = state->drs[NVMM_X64_DR_DR7]; 1801 } 1802 1803 if (flags & NVMM_X64_STATE_MSRS) { 1804 /* Bit EFER_SVME is mandatory. */ 1805 vmcb->state.efer = state->msrs[NVMM_X64_MSR_EFER] | EFER_SVME; 1806 1807 vmcb->state.star = state->msrs[NVMM_X64_MSR_STAR]; 1808 vmcb->state.lstar = state->msrs[NVMM_X64_MSR_LSTAR]; 1809 vmcb->state.cstar = state->msrs[NVMM_X64_MSR_CSTAR]; 1810 vmcb->state.sfmask = state->msrs[NVMM_X64_MSR_SFMASK]; 1811 vmcb->state.kernelgsbase = 1812 state->msrs[NVMM_X64_MSR_KERNELGSBASE]; 1813 vmcb->state.sysenter_cs = 1814 state->msrs[NVMM_X64_MSR_SYSENTER_CS]; 1815 vmcb->state.sysenter_esp = 1816 state->msrs[NVMM_X64_MSR_SYSENTER_ESP]; 1817 vmcb->state.sysenter_eip = 1818 state->msrs[NVMM_X64_MSR_SYSENTER_EIP]; 1819 vmcb->state.g_pat = state->msrs[NVMM_X64_MSR_PAT]; 1820 } 1821 1822 if (flags & NVMM_X64_STATE_MISC) { 1823 vmcb->state.cpl = state->misc[NVMM_X64_MISC_CPL]; 1824 1825 if (state->misc[NVMM_X64_MISC_INT_SHADOW]) { 1826 vmcb->ctrl.intr |= VMCB_CTRL_INTR_SHADOW; 1827 } else { 1828 vmcb->ctrl.intr &= ~VMCB_CTRL_INTR_SHADOW; 1829 } 1830 1831 if (state->misc[NVMM_X64_MISC_INT_WINDOW_EXIT]) { 1832 svm_event_waitexit_enable(vcpu, false); 1833 } else { 1834 svm_event_waitexit_disable(vcpu, false); 1835 } 1836 1837 if (state->misc[NVMM_X64_MISC_NMI_WINDOW_EXIT]) { 1838 svm_event_waitexit_enable(vcpu, true); 1839 } else { 1840 svm_event_waitexit_disable(vcpu, true); 1841 } 1842 } 1843 1844 CTASSERT(sizeof(cpudata->gfpu.xsh_fxsave) == sizeof(state->fpu)); 1845 if (flags & NVMM_X64_STATE_FPU) { 1846 memcpy(cpudata->gfpu.xsh_fxsave, &state->fpu, 1847 sizeof(state->fpu)); 1848 1849 fpustate = (struct fxsave *)cpudata->gfpu.xsh_fxsave; 1850 fpustate->fx_mxcsr_mask &= x86_fpu_mxcsr_mask; 1851 fpustate->fx_mxcsr &= fpustate->fx_mxcsr_mask; 1852 1853 if (svm_xcr0_mask != 0) { 1854 /* Reset XSTATE_BV, to force a reload. */ 1855 cpudata->gfpu.xsh_xstate_bv = svm_xcr0_mask; 1856 } 1857 } 1858 1859 svm_vmcb_cache_update(vmcb, flags); 1860 } 1861 1862 static void 1863 svm_vcpu_getstate(struct nvmm_cpu *vcpu, void *data, uint64_t flags) 1864 { 1865 struct nvmm_x64_state *state = (struct nvmm_x64_state *)data; 1866 struct svm_cpudata *cpudata = vcpu->cpudata; 1867 struct vmcb *vmcb = cpudata->vmcb; 1868 1869 if (flags & NVMM_X64_STATE_SEGS) { 1870 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_CS], 1871 &vmcb->state.cs); 1872 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_DS], 1873 &vmcb->state.ds); 1874 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_ES], 1875 &vmcb->state.es); 1876 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_FS], 1877 &vmcb->state.fs); 1878 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_GS], 1879 &vmcb->state.gs); 1880 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_SS], 1881 &vmcb->state.ss); 1882 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_GDT], 1883 &vmcb->state.gdt); 1884 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_IDT], 1885 &vmcb->state.idt); 1886 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_LDT], 1887 &vmcb->state.ldt); 1888 svm_vcpu_getstate_seg(&state->segs[NVMM_X64_SEG_TR], 1889 &vmcb->state.tr); 1890 } 1891 1892 CTASSERT(sizeof(cpudata->gprs) == sizeof(state->gprs)); 1893 if (flags & NVMM_X64_STATE_GPRS) { 1894 memcpy(state->gprs, cpudata->gprs, sizeof(state->gprs)); 1895 1896 state->gprs[NVMM_X64_GPR_RIP] = vmcb->state.rip; 1897 state->gprs[NVMM_X64_GPR_RSP] = vmcb->state.rsp; 1898 state->gprs[NVMM_X64_GPR_RAX] = vmcb->state.rax; 1899 state->gprs[NVMM_X64_GPR_RFLAGS] = vmcb->state.rflags; 1900 } 1901 1902 if (flags & NVMM_X64_STATE_CRS) { 1903 state->crs[NVMM_X64_CR_CR0] = vmcb->state.cr0; 1904 state->crs[NVMM_X64_CR_CR2] = vmcb->state.cr2; 1905 state->crs[NVMM_X64_CR_CR3] = vmcb->state.cr3; 1906 state->crs[NVMM_X64_CR_CR4] = vmcb->state.cr4; 1907 state->crs[NVMM_X64_CR_CR8] = __SHIFTOUT(vmcb->ctrl.v, 1908 VMCB_CTRL_V_TPR); 1909 state->crs[NVMM_X64_CR_XCR0] = cpudata->gxcr0; 1910 } 1911 1912 CTASSERT(sizeof(cpudata->drs) == sizeof(state->drs)); 1913 if (flags & NVMM_X64_STATE_DRS) { 1914 memcpy(state->drs, cpudata->drs, sizeof(state->drs)); 1915 1916 state->drs[NVMM_X64_DR_DR6] = vmcb->state.dr6; 1917 state->drs[NVMM_X64_DR_DR7] = vmcb->state.dr7; 1918 } 1919 1920 if (flags & NVMM_X64_STATE_MSRS) { 1921 state->msrs[NVMM_X64_MSR_EFER] = vmcb->state.efer; 1922 state->msrs[NVMM_X64_MSR_STAR] = vmcb->state.star; 1923 state->msrs[NVMM_X64_MSR_LSTAR] = vmcb->state.lstar; 1924 state->msrs[NVMM_X64_MSR_CSTAR] = vmcb->state.cstar; 1925 state->msrs[NVMM_X64_MSR_SFMASK] = vmcb->state.sfmask; 1926 state->msrs[NVMM_X64_MSR_KERNELGSBASE] = 1927 vmcb->state.kernelgsbase; 1928 state->msrs[NVMM_X64_MSR_SYSENTER_CS] = 1929 vmcb->state.sysenter_cs; 1930 state->msrs[NVMM_X64_MSR_SYSENTER_ESP] = 1931 vmcb->state.sysenter_esp; 1932 state->msrs[NVMM_X64_MSR_SYSENTER_EIP] = 1933 vmcb->state.sysenter_eip; 1934 state->msrs[NVMM_X64_MSR_PAT] = vmcb->state.g_pat; 1935 1936 /* Hide SVME. */ 1937 state->msrs[NVMM_X64_MSR_EFER] &= ~EFER_SVME; 1938 } 1939 1940 if (flags & NVMM_X64_STATE_MISC) { 1941 state->misc[NVMM_X64_MISC_CPL] = vmcb->state.cpl; 1942 1943 state->misc[NVMM_X64_MISC_INT_SHADOW] = 1944 (vmcb->ctrl.intr & VMCB_CTRL_INTR_SHADOW) != 0; 1945 state->misc[NVMM_X64_MISC_INT_WINDOW_EXIT] = 1946 cpudata->int_window_exit; 1947 state->misc[NVMM_X64_MISC_NMI_WINDOW_EXIT] = 1948 cpudata->nmi_window_exit; 1949 } 1950 1951 CTASSERT(sizeof(cpudata->gfpu.xsh_fxsave) == sizeof(state->fpu)); 1952 if (flags & NVMM_X64_STATE_FPU) { 1953 memcpy(&state->fpu, cpudata->gfpu.xsh_fxsave, 1954 sizeof(state->fpu)); 1955 } 1956 } 1957 1958 /* -------------------------------------------------------------------------- */ 1959 1960 static void 1961 svm_tlb_flush(struct pmap *pm) 1962 { 1963 struct nvmm_machine *mach = pm->pm_data; 1964 struct svm_cpudata *cpudata; 1965 struct nvmm_cpu *vcpu; 1966 int error; 1967 size_t i; 1968 1969 /* Request TLB flushes. */ 1970 for (i = 0; i < NVMM_MAX_VCPUS; i++) { 1971 error = nvmm_vcpu_get(mach, i, &vcpu); 1972 if (error) 1973 continue; 1974 cpudata = vcpu->cpudata; 1975 cpudata->tlb_want_flush = true; 1976 nvmm_vcpu_put(vcpu); 1977 } 1978 } 1979 1980 static void 1981 svm_machine_create(struct nvmm_machine *mach) 1982 { 1983 /* Fill in pmap info. */ 1984 mach->vm->vm_map.pmap->pm_data = (void *)mach; 1985 mach->vm->vm_map.pmap->pm_tlb_flush = svm_tlb_flush; 1986 1987 mach->machdata = kmem_zalloc(sizeof(struct svm_machdata), KM_SLEEP); 1988 } 1989 1990 static void 1991 svm_machine_destroy(struct nvmm_machine *mach) 1992 { 1993 kmem_free(mach->machdata, sizeof(struct svm_machdata)); 1994 } 1995 1996 static int 1997 svm_machine_configure(struct nvmm_machine *mach, uint64_t op, void *data) 1998 { 1999 struct nvmm_x86_conf_cpuid *cpuid = data; 2000 struct svm_machdata *machdata = (struct svm_machdata *)mach->machdata; 2001 size_t i; 2002 2003 if (__predict_false(op != NVMM_X86_CONF_CPUID)) { 2004 return EINVAL; 2005 } 2006 2007 if (__predict_false((cpuid->set.eax & cpuid->del.eax) || 2008 (cpuid->set.ebx & cpuid->del.ebx) || 2009 (cpuid->set.ecx & cpuid->del.ecx) || 2010 (cpuid->set.edx & cpuid->del.edx))) { 2011 return EINVAL; 2012 } 2013 2014 /* If already here, replace. */ 2015 for (i = 0; i < SVM_NCPUIDS; i++) { 2016 if (!machdata->cpuidpresent[i]) { 2017 continue; 2018 } 2019 if (machdata->cpuid[i].leaf == cpuid->leaf) { 2020 memcpy(&machdata->cpuid[i], cpuid, 2021 sizeof(struct nvmm_x86_conf_cpuid)); 2022 return 0; 2023 } 2024 } 2025 2026 /* Not here, insert. */ 2027 for (i = 0; i < SVM_NCPUIDS; i++) { 2028 if (!machdata->cpuidpresent[i]) { 2029 machdata->cpuidpresent[i] = true; 2030 memcpy(&machdata->cpuid[i], cpuid, 2031 sizeof(struct nvmm_x86_conf_cpuid)); 2032 return 0; 2033 } 2034 } 2035 2036 return ENOBUFS; 2037 } 2038 2039 /* -------------------------------------------------------------------------- */ 2040 2041 static bool 2042 svm_ident(void) 2043 { 2044 u_int descs[4]; 2045 uint64_t msr; 2046 2047 if (cpu_vendor != CPUVENDOR_AMD) { 2048 return false; 2049 } 2050 if (!(cpu_feature[3] & CPUID_SVM)) { 2051 return false; 2052 } 2053 2054 if (curcpu()->ci_max_ext_cpuid < 0x8000000a) { 2055 return false; 2056 } 2057 x86_cpuid(0x8000000a, descs); 2058 2059 /* Want Nested Paging. */ 2060 if (!(descs[3] & CPUID_AMD_SVM_NP)) { 2061 return false; 2062 } 2063 2064 /* Want nRIP. */ 2065 if (!(descs[3] & CPUID_AMD_SVM_NRIPS)) { 2066 return false; 2067 } 2068 2069 svm_decode_assist = (descs[3] & CPUID_AMD_SVM_DecodeAssist) != 0; 2070 2071 msr = rdmsr(MSR_VMCR); 2072 if ((msr & VMCR_SVMED) && (msr & VMCR_LOCK)) { 2073 return false; 2074 } 2075 2076 return true; 2077 } 2078 2079 static void 2080 svm_init_asid(uint32_t maxasid) 2081 { 2082 size_t i, j, allocsz; 2083 2084 mutex_init(&svm_asidlock, MUTEX_DEFAULT, IPL_NONE); 2085 2086 /* Arbitrarily limit. */ 2087 maxasid = uimin(maxasid, 8192); 2088 2089 svm_maxasid = maxasid; 2090 allocsz = roundup(maxasid, 8) / 8; 2091 svm_asidmap = kmem_zalloc(allocsz, KM_SLEEP); 2092 2093 /* ASID 0 is reserved for the host. */ 2094 svm_asidmap[0] |= __BIT(0); 2095 2096 /* ASID n-1 is special, we share it. */ 2097 i = (maxasid - 1) / 8; 2098 j = (maxasid - 1) % 8; 2099 svm_asidmap[i] |= __BIT(j); 2100 } 2101 2102 static void 2103 svm_change_cpu(void *arg1, void *arg2) 2104 { 2105 bool enable = (bool)arg1; 2106 uint64_t msr; 2107 2108 msr = rdmsr(MSR_VMCR); 2109 if (msr & VMCR_SVMED) { 2110 wrmsr(MSR_VMCR, msr & ~VMCR_SVMED); 2111 } 2112 2113 if (!enable) { 2114 wrmsr(MSR_VM_HSAVE_PA, 0); 2115 } 2116 2117 msr = rdmsr(MSR_EFER); 2118 if (enable) { 2119 msr |= EFER_SVME; 2120 } else { 2121 msr &= ~EFER_SVME; 2122 } 2123 wrmsr(MSR_EFER, msr); 2124 2125 if (enable) { 2126 wrmsr(MSR_VM_HSAVE_PA, hsave[cpu_index(curcpu())].pa); 2127 } 2128 } 2129 2130 static void 2131 svm_init(void) 2132 { 2133 CPU_INFO_ITERATOR cii; 2134 struct cpu_info *ci; 2135 struct vm_page *pg; 2136 u_int descs[4]; 2137 uint64_t xc; 2138 2139 x86_cpuid(0x8000000a, descs); 2140 2141 /* The guest TLB flush command. */ 2142 if (descs[3] & CPUID_AMD_SVM_FlushByASID) { 2143 svm_ctrl_tlb_flush = VMCB_CTRL_TLB_CTRL_FLUSH_GUEST; 2144 } else { 2145 svm_ctrl_tlb_flush = VMCB_CTRL_TLB_CTRL_FLUSH_ALL; 2146 } 2147 2148 /* Init the ASID. */ 2149 svm_init_asid(descs[1]); 2150 2151 /* Init the XCR0 mask. */ 2152 svm_xcr0_mask = SVM_XCR0_MASK_DEFAULT & x86_xsave_features; 2153 2154 memset(hsave, 0, sizeof(hsave)); 2155 for (CPU_INFO_FOREACH(cii, ci)) { 2156 pg = uvm_pagealloc(NULL, 0, NULL, UVM_PGA_ZERO); 2157 hsave[cpu_index(ci)].pa = VM_PAGE_TO_PHYS(pg); 2158 } 2159 2160 xc = xc_broadcast(0, svm_change_cpu, (void *)true, NULL); 2161 xc_wait(xc); 2162 } 2163 2164 static void 2165 svm_fini_asid(void) 2166 { 2167 size_t allocsz; 2168 2169 allocsz = roundup(svm_maxasid, 8) / 8; 2170 kmem_free(svm_asidmap, allocsz); 2171 2172 mutex_destroy(&svm_asidlock); 2173 } 2174 2175 static void 2176 svm_fini(void) 2177 { 2178 uint64_t xc; 2179 size_t i; 2180 2181 xc = xc_broadcast(0, svm_change_cpu, (void *)false, NULL); 2182 xc_wait(xc); 2183 2184 for (i = 0; i < MAXCPUS; i++) { 2185 if (hsave[i].pa != 0) 2186 uvm_pagefree(PHYS_TO_VM_PAGE(hsave[i].pa)); 2187 } 2188 2189 svm_fini_asid(); 2190 } 2191 2192 static void 2193 svm_capability(struct nvmm_capability *cap) 2194 { 2195 cap->u.x86.xcr0_mask = svm_xcr0_mask; 2196 cap->u.x86.mxcsr_mask = x86_fpu_mxcsr_mask; 2197 cap->u.x86.conf_cpuid_maxops = SVM_NCPUIDS; 2198 } 2199 2200 const struct nvmm_impl nvmm_x86_svm = { 2201 .ident = svm_ident, 2202 .init = svm_init, 2203 .fini = svm_fini, 2204 .capability = svm_capability, 2205 .conf_max = NVMM_X86_NCONF, 2206 .conf_sizes = svm_conf_sizes, 2207 .state_size = sizeof(struct nvmm_x64_state), 2208 .machine_create = svm_machine_create, 2209 .machine_destroy = svm_machine_destroy, 2210 .machine_configure = svm_machine_configure, 2211 .vcpu_create = svm_vcpu_create, 2212 .vcpu_destroy = svm_vcpu_destroy, 2213 .vcpu_setstate = svm_vcpu_setstate, 2214 .vcpu_getstate = svm_vcpu_getstate, 2215 .vcpu_inject = svm_vcpu_inject, 2216 .vcpu_run = svm_vcpu_run 2217 }; 2218
Indexes created Wed Oct 01 15:09:59 GMT 2025