1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org> 5 * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 6 * Copyright (c) 2003 Peter Wemm 7 * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org> 8 * All rights reserved. 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/eventhandler.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/memrange.h> 38 #include <sys/smp.h> 39 #include <sys/systm.h> 40 #include <sys/cons.h> 41 42 #include <vm/vm.h> 43 #include <vm/pmap.h> 44 #include <vm/vm_page.h> 45 46 #include <machine/clock.h> 47 #include <machine/cpu.h> 48 #include <machine/intr_machdep.h> 49 #include <machine/md_var.h> 50 #include <x86/mca.h> 51 #include <machine/pcb.h> 52 #include <machine/specialreg.h> 53 #include <x86/ucode.h> 54 55 #include <x86/apicreg.h> 56 #include <x86/apicvar.h> 57 #ifdef SMP 58 #include <machine/smp.h> 59 #include <machine/vmparam.h> 60 #endif 61 62 #include <contrib/dev/acpica/include/acpi.h> 63 64 #include <dev/acpica/acpivar.h> 65 66 #include "acpi_wakecode.h" 67 #include "acpi_wakedata.h" 68 69 /* Make sure the code is less than a page and leave room for the stack. */ 70 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 71 72 extern int acpi_resume_beep; 73 extern int acpi_reset_video; 74 extern int acpi_susp_bounce; 75 76 #ifdef SMP 77 extern struct susppcb **susppcbs; 78 static cpuset_t suspcpus; 79 #else 80 static struct susppcb **susppcbs; 81 #endif 82 83 static void acpi_stop_beep(void *); 84 85 #ifdef SMP 86 static int acpi_wakeup_ap(struct acpi_softc *, int); 87 static void acpi_wakeup_cpus(struct acpi_softc *); 88 #endif 89 90 #define ACPI_WAKEPT_PAGES 7 91 92 #define WAKECODE_FIXUP(offset, type, val) do { \ 93 type *addr; \ 94 addr = (type *)(sc->acpi_wakeaddr + (offset)); \ 95 *addr = val; \ 96 } while (0) 97 98 static void 99 acpi_stop_beep(void *arg) 100 { 101 102 if (acpi_resume_beep != 0) 103 timer_spkr_release(); 104 } 105 106 #ifdef SMP 107 static int 108 acpi_wakeup_ap(struct acpi_softc *sc, int cpu) 109 { 110 struct pcb *pcb; 111 int vector = (sc->acpi_wakephys >> 12) & 0xff; 112 int apic_id = cpu_apic_ids[cpu]; 113 int ms; 114 115 pcb = &susppcbs[cpu]->sp_pcb; 116 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 117 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 118 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 119 120 ipi_startup(apic_id, vector); 121 122 /* Wait up to 5 seconds for it to resume. */ 123 for (ms = 0; ms < 5000; ms++) { 124 if (!CPU_ISSET(cpu, &suspended_cpus)) 125 return (1); /* return SUCCESS */ 126 DELAY(1000); 127 } 128 return (0); /* return FAILURE */ 129 } 130 131 #define WARMBOOT_TARGET 0 132 #define WARMBOOT_OFF (KERNBASE + 0x0467) 133 #define WARMBOOT_SEG (KERNBASE + 0x0469) 134 135 #define CMOS_REG (0x70) 136 #define CMOS_DATA (0x71) 137 #define BIOS_RESET (0x0f) 138 #define BIOS_WARM (0x0a) 139 140 static void 141 acpi_wakeup_cpus(struct acpi_softc *sc) 142 { 143 uint32_t mpbioswarmvec; 144 int cpu; 145 u_char mpbiosreason; 146 147 if (!efi_boot) { 148 /* save the current value of the warm-start vector */ 149 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF); 150 outb(CMOS_REG, BIOS_RESET); 151 mpbiosreason = inb(CMOS_DATA); 152 153 /* setup a vector to our boot code */ 154 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; 155 *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4; 156 outb(CMOS_REG, BIOS_RESET); 157 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ 158 } 159 160 /* Wake up each AP. */ 161 for (cpu = 1; cpu < mp_ncpus; cpu++) { 162 if (!CPU_ISSET(cpu, &suspcpus)) 163 continue; 164 if (acpi_wakeup_ap(sc, cpu) == 0) { 165 /* restore the warmstart vector */ 166 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 167 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)", 168 cpu, cpu_apic_ids[cpu]); 169 } 170 } 171 172 if (!efi_boot) { 173 /* restore the warmstart vector */ 174 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 175 176 outb(CMOS_REG, BIOS_RESET); 177 outb(CMOS_DATA, mpbiosreason); 178 } 179 } 180 #endif 181 182 int 183 acpi_sleep_machdep(struct acpi_softc *sc, int state) 184 { 185 ACPI_STATUS status; 186 struct pcb *pcb; 187 struct pcpu *pc; 188 int i; 189 190 if (sc->acpi_wakeaddr == 0ul) 191 return (-1); /* couldn't alloc wake memory */ 192 193 #ifdef SMP 194 suspcpus = all_cpus; 195 CPU_CLR(PCPU_GET(cpuid), &suspcpus); 196 #endif 197 198 if (acpi_resume_beep != 0) 199 timer_spkr_acquire(); 200 201 AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0); 202 203 intr_suspend(); 204 205 pcb = &susppcbs[0]->sp_pcb; 206 if (savectx(pcb)) { 207 fpususpend(susppcbs[0]->sp_fpususpend); 208 #ifdef SMP 209 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { 210 device_printf(sc->acpi_dev, "Failed to suspend APs\n"); 211 return (0); /* couldn't sleep */ 212 } 213 #endif 214 hw_ibrs_ibpb_active = 0; 215 hw_ssb_active = 0; 216 cpu_stdext_feature3 = 0; 217 CPU_FOREACH(i) { 218 pc = pcpu_find(i); 219 pc->pc_ibpb_set = 0; 220 } 221 222 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); 223 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); 224 225 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER) & 226 ~(EFER_LMA)); 227 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 228 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 229 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 230 231 /* Call ACPICA to enter the desired sleep state */ 232 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 233 status = AcpiEnterSleepStateS4bios(); 234 else 235 status = AcpiEnterSleepState(state); 236 if (ACPI_FAILURE(status)) { 237 device_printf(sc->acpi_dev, 238 "AcpiEnterSleepState failed - %s\n", 239 AcpiFormatException(status)); 240 return (0); /* couldn't sleep */ 241 } 242 243 if (acpi_susp_bounce) 244 resumectx(pcb); 245 246 for (;;) 247 ia32_pause(); 248 } else { 249 /* 250 * Re-initialize console hardware as soon as possible. 251 * No console output (e.g. printf) is allowed before 252 * this point. 253 */ 254 cnresume(); 255 fpuresume(susppcbs[0]->sp_fpususpend); 256 } 257 258 return (1); /* wakeup successfully */ 259 } 260 261 int 262 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, 263 int intr_enabled) 264 { 265 266 if (sleep_result == -1) 267 return (sleep_result); 268 269 if (!intr_enabled) { 270 /* Wakeup MD procedures in interrupt disabled context */ 271 if (sleep_result == 1) { 272 ucode_reload(); 273 pmap_init_pat(); 274 initializecpu(); 275 PCPU_SET(switchtime, 0); 276 PCPU_SET(switchticks, ticks); 277 lapic_xapic_mode(); 278 #ifdef SMP 279 if (!CPU_EMPTY(&suspcpus)) 280 acpi_wakeup_cpus(sc); 281 #endif 282 } 283 284 #ifdef SMP 285 if (!CPU_EMPTY(&suspcpus)) 286 resume_cpus(suspcpus); 287 #endif 288 289 /* 290 * Re-read cpu_stdext_feature3, which was zeroed-out 291 * in acpi_sleep_machdep(), after the microcode was 292 * reloaded. Then recalculate the active mitigation 293 * knobs that depend on the microcode and 294 * cpu_stdext_feature3. Do it after LAPICs are woken, 295 * so that IPIs work. 296 */ 297 identify_cpu_ext_features(); 298 299 mca_resume(); 300 if (vmm_resume_p != NULL) 301 vmm_resume_p(); 302 intr_resume(/*suspend_cancelled*/false); 303 304 hw_ibrs_recalculate(true); 305 amd64_syscall_ret_flush_l1d_recalc(); 306 hw_ssb_recalculate(true); 307 x86_rngds_mitg_recalculate(true); 308 zenbleed_check_and_apply(true); 309 310 AcpiSetFirmwareWakingVector(0, 0); 311 } else { 312 /* Wakeup MD procedures in interrupt enabled context */ 313 if (sleep_result == 1 && mem_range_softc.mr_op != NULL && 314 mem_range_softc.mr_op->reinit != NULL) 315 mem_range_softc.mr_op->reinit(&mem_range_softc); 316 } 317 318 return (sleep_result); 319 } 320 321 static void 322 acpi_alloc_wakeup_handler(void **wakeaddr, 323 void *wakept_pages[ACPI_WAKEPT_PAGES]) 324 { 325 vm_page_t wakept_m[ACPI_WAKEPT_PAGES]; 326 int i; 327 328 *wakeaddr = NULL; 329 memset(wakept_pages, 0, ACPI_WAKEPT_PAGES * sizeof(*wakept_pages)); 330 memset(wakept_m, 0, ACPI_WAKEPT_PAGES * sizeof(*wakept_m)); 331 332 /* 333 * Specify the region for our wakeup code. We want it in the 334 * low 1 MB region, excluding real mode IVT (0-0x3ff), BDA 335 * (0x400-0x4ff), EBDA (less than 128KB, below 0xa0000, must 336 * be excluded by SMAP and DSDT), and ROM area (0xa0000 and 337 * above). 338 */ 339 *wakeaddr = contigmalloc(PAGE_SIZE, M_DEVBUF, 340 M_NOWAIT, 0x500, 0xa0000, PAGE_SIZE, 0ul); 341 if (*wakeaddr == NULL) { 342 printf("%s: can't alloc wake memory\n", __func__); 343 goto freepages; 344 } 345 346 for (i = 0; i < ACPI_WAKEPT_PAGES - (la57 ? 0 : 1); i++) { 347 wakept_m[i] = pmap_page_alloc_below_4g(true); 348 wakept_pages[i] = (void *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS( 349 wakept_m[i])); 350 } 351 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 352 EVENTHANDLER_PRI_LAST) == NULL) { 353 printf("%s: can't register event handler\n", __func__); 354 goto freepages; 355 } 356 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 357 for (i = 0; i < mp_ncpus; i++) { 358 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 359 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); 360 } 361 return; 362 363 freepages: 364 if (*wakeaddr != NULL) 365 contigfree(*wakeaddr, PAGE_SIZE, M_DEVBUF); 366 for (i = 0; i < ACPI_WAKEPT_PAGES; i++) { 367 if (wakept_m[i] != NULL) 368 vm_page_free(wakept_m[i]); 369 } 370 *wakeaddr = NULL; 371 } 372 373 void 374 acpi_install_wakeup_handler(struct acpi_softc *sc) 375 { 376 static void *wakeaddr; 377 void *wakept_pages[ACPI_WAKEPT_PAGES]; 378 uint64_t *pt5, *pt4, *pt3, *pt2_0, *pt2_1, *pt2_2, *pt2_3; 379 vm_paddr_t pt5pa, pt4pa, pt3pa, pt2_0pa, pt2_1pa, pt2_2pa, pt2_3pa; 380 int i; 381 382 if (wakeaddr != NULL) 383 return; 384 acpi_alloc_wakeup_handler(&wakeaddr, wakept_pages); 385 if (wakeaddr == NULL) 386 return; 387 388 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 389 sc->acpi_wakephys = vtophys(wakeaddr); 390 391 if (la57) { 392 pt5 = wakept_pages[6]; 393 pt5pa = vtophys(pt5); 394 } 395 pt4 = wakept_pages[0]; 396 pt3 = wakept_pages[1]; 397 pt2_0 = wakept_pages[2]; 398 pt2_1 = wakept_pages[3]; 399 pt2_2 = wakept_pages[4]; 400 pt2_3 = wakept_pages[5]; 401 pt4pa = vtophys(pt4); 402 pt3pa = vtophys(pt3); 403 pt2_0pa = vtophys(pt2_0); 404 pt2_1pa = vtophys(pt2_1); 405 pt2_2pa = vtophys(pt2_2); 406 pt2_3pa = vtophys(pt2_3); 407 408 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 409 410 /* Patch GDT base address, ljmp targets. */ 411 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 412 sc->acpi_wakephys + bootgdt); 413 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 414 sc->acpi_wakephys + wakeup_32); 415 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t, 416 sc->acpi_wakephys + wakeup_64); 417 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, la57 ? (pt5pa | 0x1) : 418 pt4pa); 419 420 /* Save pointers to some global data. */ 421 WAKECODE_FIXUP(wakeup_ret, void *, resumectx); 422 /* Create 1:1 mapping for the low 4G */ 423 if (la57) { 424 bcopy(kernel_pmap->pm_pmltop, pt5, PAGE_SIZE); 425 pt5[0] = (uint64_t)pt4pa; 426 pt5[0] |= PG_V | PG_RW | PG_U; 427 } else { 428 bcopy(kernel_pmap->pm_pmltop, pt4, PAGE_SIZE); 429 } 430 431 pt4[0] = (uint64_t)pt3pa; 432 pt4[0] |= PG_V | PG_RW | PG_U; 433 434 pt3[0] = (uint64_t)pt2_0pa; 435 pt3[0] |= PG_V | PG_RW | PG_U; 436 pt3[1] = (uint64_t)pt2_1pa; 437 pt3[1] |= PG_V | PG_RW | PG_U; 438 pt3[2] = (uint64_t)pt2_2pa; 439 pt3[2] |= PG_V | PG_RW | PG_U; 440 pt3[3] = (uint64_t)pt2_3pa; 441 pt3[3] |= PG_V | PG_RW | PG_U; 442 443 for (i = 0; i < NPDEPG; i++) { 444 pt2_0[i] = (pd_entry_t)i * NBPDR; 445 pt2_0[i] |= PG_V | PG_RW | PG_PS | PG_U; 446 } 447 for (i = 0; i < NPDEPG; i++) { 448 pt2_1[i] = (pd_entry_t)NBPDP + i * NBPDR; 449 pt2_1[i] |= PG_V | PG_RW | PG_PS | PG_U; 450 } 451 for (i = 0; i < NPDEPG; i++) { 452 pt2_2[i] = (pd_entry_t)2 * NBPDP + i * NBPDR; 453 pt2_2[i] |= PG_V | PG_RW | PG_PS | PG_U; 454 } 455 for (i = 0; i < NPDEPG; i++) { 456 pt2_3[i] = (pd_entry_t)3 * NBPDP + i * NBPDR; 457 pt2_3[i] |= PG_V | PG_RW | PG_PS | PG_U; 458 } 459 460 if (bootverbose) 461 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", 462 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); 463 } 464