1/* 2 * Copyright (c) 2008, 2013 Citrix Systems, Inc. 3 * Copyright (c) 2012 Spectra Logic Corporation 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD$"); 30 31#include <sys/param.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34#include <sys/malloc.h> 35#include <sys/proc.h> 36#include <sys/smp.h> 37#include <sys/systm.h> 38 39#include <vm/vm.h> 40#include <vm/pmap.h> 41 42#include <dev/pci/pcivar.h> 43 44#include <machine/cpufunc.h> 45#include <machine/cpu.h> 46#include <machine/smp.h> 47 48#include <x86/apicreg.h> 49 50#include <xen/xen-os.h> 51#include <xen/features.h> 52#include <xen/gnttab.h> 53#include <xen/hypervisor.h> 54#include <xen/hvm.h> 55#include <xen/xen_intr.h> 56 57#include <xen/interface/hvm/params.h> 58#include <xen/interface/vcpu.h> 59 60/*--------------------------- Forward Declarations ---------------------------*/ 61#ifdef SMP 62static driver_filter_t xen_smp_rendezvous_action; 63static driver_filter_t xen_invltlb; 64static driver_filter_t xen_invlpg; 65static driver_filter_t xen_invlrng; 66static driver_filter_t xen_invlcache; 67#ifdef __i386__ 68static driver_filter_t xen_lazypmap; 69#endif 70static driver_filter_t xen_ipi_bitmap_handler; 71static driver_filter_t xen_cpustop_handler; 72static driver_filter_t xen_cpususpend_handler; 73static driver_filter_t xen_cpustophard_handler; 74#endif 75static void xen_ipi_vectored(u_int vector, int dest); 76static void xen_hvm_cpu_resume(void); 77static void xen_hvm_cpu_init(void); 78 79/*---------------------------- Extern Declarations ---------------------------*/ 80/* Variables used by mp_machdep to perform the MMU related IPIs */ 81extern volatile int smp_tlb_wait; 82extern vm_offset_t smp_tlb_addr2; 83#ifdef __i386__ 84extern vm_offset_t smp_tlb_addr1; 85#else 86extern struct invpcid_descr smp_tlb_invpcid; 87extern uint64_t pcid_cr3; 88extern int invpcid_works; 89extern int pmap_pcid_enabled; 90extern pmap_t smp_tlb_pmap; 91#endif 92 93#ifdef __i386__ 94extern void pmap_lazyfix_action(void); 95#endif 96 97/* Variables used by mp_machdep to perform the bitmap IPI */ 98extern volatile u_int cpu_ipi_pending[MAXCPU]; 99 100/*---------------------------------- Macros ----------------------------------*/ 101#define IPI_TO_IDX(ipi) ((ipi) - APIC_IPI_INTS) 102 103/*-------------------------------- Local Types -------------------------------*/ 104enum xen_hvm_init_type { 105 XEN_HVM_INIT_COLD, 106 XEN_HVM_INIT_CANCELLED_SUSPEND, 107 XEN_HVM_INIT_RESUME 108}; 109 110struct xen_ipi_handler 111{ 112 driver_filter_t *filter; 113 const char *description; 114}; 115 116/*-------------------------------- Global Data -------------------------------*/ 117enum xen_domain_type xen_domain_type = XEN_NATIVE; 118 119struct cpu_ops xen_hvm_cpu_ops = { 120 .ipi_vectored = lapic_ipi_vectored, 121 .cpu_init = xen_hvm_cpu_init, 122 .cpu_resume = xen_hvm_cpu_resume 123}; 124 125static MALLOC_DEFINE(M_XENHVM, "xen_hvm", "Xen HVM PV Support"); 126 127#ifdef SMP 128static struct xen_ipi_handler xen_ipis[] = 129{ 130 [IPI_TO_IDX(IPI_RENDEZVOUS)] = { xen_smp_rendezvous_action, "r" }, 131 [IPI_TO_IDX(IPI_INVLTLB)] = { xen_invltlb, "itlb"}, 132 [IPI_TO_IDX(IPI_INVLPG)] = { xen_invlpg, "ipg" }, 133 [IPI_TO_IDX(IPI_INVLRNG)] = { xen_invlrng, "irg" }, 134 [IPI_TO_IDX(IPI_INVLCACHE)] = { xen_invlcache, "ic" }, 135#ifdef __i386__ 136 [IPI_TO_IDX(IPI_LAZYPMAP)] = { xen_lazypmap, "lp" }, 137#endif 138 [IPI_TO_IDX(IPI_BITMAP_VECTOR)] = { xen_ipi_bitmap_handler, "b" }, 139 [IPI_TO_IDX(IPI_STOP)] = { xen_cpustop_handler, "st" }, 140 [IPI_TO_IDX(IPI_SUSPEND)] = { xen_cpususpend_handler, "sp" }, 141 [IPI_TO_IDX(IPI_STOP_HARD)] = { xen_cpustophard_handler, "sth" }, 142}; 143#endif 144 145/** 146 * If non-zero, the hypervisor has been configured to use a direct 147 * IDT event callback for interrupt injection. 148 */ 149int xen_vector_callback_enabled; 150 151/*------------------------------- Per-CPU Data -------------------------------*/ 152DPCPU_DEFINE(struct vcpu_info, vcpu_local_info); 153DPCPU_DEFINE(struct vcpu_info *, vcpu_info); 154#ifdef SMP 155DPCPU_DEFINE(xen_intr_handle_t, ipi_handle[nitems(xen_ipis)]); 156#endif 157 158/*------------------ Hypervisor Access Shared Memory Regions -----------------*/ 159/** Hypercall table accessed via HYPERVISOR_*_op() methods. */ 160char *hypercall_stubs; 161shared_info_t *HYPERVISOR_shared_info; 162 163#ifdef SMP 164/*---------------------------- XEN PV IPI Handlers ---------------------------*/ 165/* 166 * This are C clones of the ASM functions found in apic_vector.s 167 */ 168static int 169xen_ipi_bitmap_handler(void *arg) 170{ 171 struct trapframe *frame; 172 173 frame = arg; 174 ipi_bitmap_handler(*frame); 175 return (FILTER_HANDLED); 176} 177 178static int 179xen_smp_rendezvous_action(void *arg) 180{ 181#ifdef COUNT_IPIS 182 int cpu; 183 184 cpu = PCPU_GET(cpuid); 185 (*ipi_rendezvous_counts[cpu])++; 186#endif /* COUNT_IPIS */ 187 188 smp_rendezvous_action(); 189 return (FILTER_HANDLED); 190} 191 192static int 193xen_invltlb(void *arg) 194{ 195#if defined(COUNT_XINVLTLB_HITS) || defined(COUNT_IPIS) 196 int cpu; 197 198 cpu = PCPU_GET(cpuid); 199#ifdef COUNT_XINVLTLB_HITS 200 xhits_gbl[cpu]++; 201#endif /* COUNT_XINVLTLB_HITS */ 202#ifdef COUNT_IPIS 203 (*ipi_invltlb_counts[cpu])++; 204#endif /* COUNT_IPIS */ 205#endif /* COUNT_XINVLTLB_HITS || COUNT_IPIS */ 206 207 invltlb(); 208 atomic_add_int(&smp_tlb_wait, 1); 209 return (FILTER_HANDLED); 210} 211 212#ifdef __amd64__ 213static int 214xen_invltlb_pcid(void *arg) 215{ 216 uint64_t cr3; 217#if defined(COUNT_XINVLTLB_HITS) || defined(COUNT_IPIS) 218 int cpu; 219 220 cpu = PCPU_GET(cpuid); 221#ifdef COUNT_XINVLTLB_HITS 222 xhits_gbl[cpu]++; 223#endif /* COUNT_XINVLTLB_HITS */ 224#ifdef COUNT_IPIS 225 (*ipi_invltlb_counts[cpu])++; 226#endif /* COUNT_IPIS */ 227#endif /* COUNT_XINVLTLB_HITS || COUNT_IPIS */ 228 229 cr3 = rcr3(); 230 if (smp_tlb_invpcid.pcid != (uint64_t)-1 && 231 smp_tlb_invpcid.pcid != 0) { 232 233 if (invpcid_works) { 234 invpcid(&smp_tlb_invpcid, INVPCID_CTX); 235 } else { 236 /* Otherwise reload %cr3 twice. */ 237 if (cr3 != pcid_cr3) { 238 load_cr3(pcid_cr3); 239 cr3 |= CR3_PCID_SAVE; 240 } 241 load_cr3(cr3); 242 } 243 } else { 244 invltlb_globpcid(); 245 } 246 if (smp_tlb_pmap != NULL) 247 CPU_CLR_ATOMIC(PCPU_GET(cpuid), &smp_tlb_pmap->pm_save); 248 249 atomic_add_int(&smp_tlb_wait, 1); 250 return (FILTER_HANDLED); 251} 252#endif 253 254static int 255xen_invlpg(void *arg) 256{ 257#if defined(COUNT_XINVLTLB_HITS) || defined(COUNT_IPIS) 258 int cpu; 259 260 cpu = PCPU_GET(cpuid); 261#ifdef COUNT_XINVLTLB_HITS 262 xhits_pg[cpu]++; 263#endif /* COUNT_XINVLTLB_HITS */ 264#ifdef COUNT_IPIS 265 (*ipi_invlpg_counts[cpu])++; 266#endif /* COUNT_IPIS */ 267#endif /* COUNT_XINVLTLB_HITS || COUNT_IPIS */ 268 269#ifdef __i386__ 270 invlpg(smp_tlb_addr1); 271#else 272 invlpg(smp_tlb_invpcid.addr); 273#endif 274 atomic_add_int(&smp_tlb_wait, 1); 275 return (FILTER_HANDLED); 276} 277 278#ifdef __amd64__ 279static int 280xen_invlpg_pcid(void *arg) 281{ 282#if defined(COUNT_XINVLTLB_HITS) || defined(COUNT_IPIS) 283 int cpu; 284 285 cpu = PCPU_GET(cpuid); 286#ifdef COUNT_XINVLTLB_HITS 287 xhits_pg[cpu]++; 288#endif /* COUNT_XINVLTLB_HITS */ 289#ifdef COUNT_IPIS 290 (*ipi_invlpg_counts[cpu])++; 291#endif /* COUNT_IPIS */ 292#endif /* COUNT_XINVLTLB_HITS || COUNT_IPIS */ 293 294 if (invpcid_works) { 295 invpcid(&smp_tlb_invpcid, INVPCID_ADDR); 296 } else if (smp_tlb_invpcid.pcid == 0) { 297 invlpg(smp_tlb_invpcid.addr); 298 } else if (smp_tlb_invpcid.pcid == (uint64_t)-1) { 299 invltlb_globpcid(); 300 } else { 301 uint64_t cr3; 302 303 /* 304 * PCID supported, but INVPCID is not. 305 * Temporarily switch to the target address 306 * space and do INVLPG. 307 */ 308 cr3 = rcr3(); 309 if (cr3 != pcid_cr3) 310 load_cr3(pcid_cr3 | CR3_PCID_SAVE); 311 invlpg(smp_tlb_invpcid.addr); 312 load_cr3(cr3 | CR3_PCID_SAVE); 313 } 314 315 atomic_add_int(&smp_tlb_wait, 1); 316 return (FILTER_HANDLED); 317} 318#endif 319 320static inline void 321invlpg_range(vm_offset_t start, vm_offset_t end) 322{ 323 do { 324 invlpg(start); 325 start += PAGE_SIZE; 326 } while (start < end); 327} 328 329static int 330xen_invlrng(void *arg) 331{ 332 vm_offset_t addr; 333#if defined(COUNT_XINVLTLB_HITS) || defined(COUNT_IPIS) 334 int cpu; 335 336 cpu = PCPU_GET(cpuid); 337#ifdef COUNT_XINVLTLB_HITS 338 xhits_rng[cpu]++; 339#endif /* COUNT_XINVLTLB_HITS */ 340#ifdef COUNT_IPIS 341 (*ipi_invlrng_counts[cpu])++; 342#endif /* COUNT_IPIS */ 343#endif /* COUNT_XINVLTLB_HITS || COUNT_IPIS */ 344 345#ifdef __i386__ 346 addr = smp_tlb_addr1; 347 invlpg_range(addr, smp_tlb_addr2); 348#else 349 addr = smp_tlb_invpcid.addr; 350 if (pmap_pcid_enabled) { 351 if (invpcid_works) { 352 struct invpcid_descr d; 353 354 d = smp_tlb_invpcid; 355 do { 356 invpcid(&d, INVPCID_ADDR); 357 d.addr += PAGE_SIZE; 358 } while (d.addr < smp_tlb_addr2); 359 } else if (smp_tlb_invpcid.pcid == 0) { 360 /* 361 * kernel pmap - use invlpg to invalidate 362 * global mapping. 363 */ 364 invlpg_range(addr, smp_tlb_addr2); 365 } else if (smp_tlb_invpcid.pcid != (uint64_t)-1) { 366 invltlb_globpcid(); 367 if (smp_tlb_pmap != NULL) { 368 CPU_CLR_ATOMIC(PCPU_GET(cpuid), 369 &smp_tlb_pmap->pm_save); 370 } 371 } else { 372 uint64_t cr3; 373 374 cr3 = rcr3(); 375 if (cr3 != pcid_cr3) 376 load_cr3(pcid_cr3 | CR3_PCID_SAVE); 377 invlpg_range(addr, smp_tlb_addr2); 378 load_cr3(cr3 | CR3_PCID_SAVE); 379 } 380 } else { 381 invlpg_range(addr, smp_tlb_addr2); 382 } 383#endif 384 385 atomic_add_int(&smp_tlb_wait, 1); 386 return (FILTER_HANDLED); 387} 388 389static int 390xen_invlcache(void *arg) 391{ 392#ifdef COUNT_IPIS 393 int cpu = PCPU_GET(cpuid); 394 395 cpu = PCPU_GET(cpuid); 396 (*ipi_invlcache_counts[cpu])++; 397#endif /* COUNT_IPIS */ 398 399 wbinvd(); 400 atomic_add_int(&smp_tlb_wait, 1); 401 return (FILTER_HANDLED); 402} 403 404#ifdef __i386__ 405static int 406xen_lazypmap(void *arg) 407{ 408 409 pmap_lazyfix_action(); 410 return (FILTER_HANDLED); 411} 412#endif 413 414static int 415xen_cpustop_handler(void *arg) 416{ 417 418 cpustop_handler(); 419 return (FILTER_HANDLED); 420} 421 422static int 423xen_cpususpend_handler(void *arg) 424{ 425 426 cpususpend_handler(); 427 return (FILTER_HANDLED); 428} 429 430static int 431xen_cpustophard_handler(void *arg) 432{ 433 434 ipi_nmi_handler(); 435 return (FILTER_HANDLED); 436} 437 438/* Xen PV IPI sender */ 439static void 440xen_ipi_vectored(u_int vector, int dest) 441{ 442 xen_intr_handle_t *ipi_handle; 443 int ipi_idx, to_cpu, self; 444 445 ipi_idx = IPI_TO_IDX(vector); 446 if (ipi_idx > nitems(xen_ipis)) 447 panic("IPI out of range"); 448 449 switch(dest) { 450 case APIC_IPI_DEST_SELF: 451 ipi_handle = DPCPU_GET(ipi_handle); 452 xen_intr_signal(ipi_handle[ipi_idx]); 453 break; 454 case APIC_IPI_DEST_ALL: 455 CPU_FOREACH(to_cpu) { 456 ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle); 457 xen_intr_signal(ipi_handle[ipi_idx]); 458 } 459 break; 460 case APIC_IPI_DEST_OTHERS: 461 self = PCPU_GET(cpuid); 462 CPU_FOREACH(to_cpu) { 463 if (to_cpu != self) { 464 ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle); 465 xen_intr_signal(ipi_handle[ipi_idx]); 466 } 467 } 468 break; 469 default: 470 to_cpu = apic_cpuid(dest); 471 ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle); 472 xen_intr_signal(ipi_handle[ipi_idx]); 473 break; 474 } 475} 476 477/* XEN diverged cpu operations */ 478static void 479xen_hvm_cpu_resume(void) 480{ 481 u_int cpuid = PCPU_GET(cpuid); 482 483 /* 484 * Reset pending bitmap IPIs, because Xen doesn't preserve pending 485 * event channels on migration. 486 */ 487 cpu_ipi_pending[cpuid] = 0; 488 489 /* register vcpu_info area */ 490 xen_hvm_cpu_init(); 491} 492 493static void 494xen_cpu_ipi_init(int cpu) 495{ 496 xen_intr_handle_t *ipi_handle; 497 const struct xen_ipi_handler *ipi; 498 device_t dev; 499 int idx, rc; 500 501 ipi_handle = DPCPU_ID_GET(cpu, ipi_handle); 502 dev = pcpu_find(cpu)->pc_device; 503 KASSERT((dev != NULL), ("NULL pcpu device_t")); 504 505 for (ipi = xen_ipis, idx = 0; idx < nitems(xen_ipis); ipi++, idx++) { 506 507 if (ipi->filter == NULL) { 508 ipi_handle[idx] = NULL; 509 continue; 510 } 511 512 rc = xen_intr_alloc_and_bind_ipi(dev, cpu, ipi->filter, 513 INTR_TYPE_TTY, &ipi_handle[idx]); 514 if (rc != 0) 515 panic("Unable to allocate a XEN IPI port"); 516 xen_intr_describe(ipi_handle[idx], "%s", ipi->description); 517 } 518} 519 520static void 521xen_setup_cpus(void) 522{ 523 int i; 524 525 if (!xen_hvm_domain() || !xen_vector_callback_enabled) 526 return; 527 528#ifdef __amd64__ 529 if (pmap_pcid_enabled) { 530 xen_ipis[IPI_TO_IDX(IPI_INVLTLB)].filter = xen_invltlb_pcid; 531 xen_ipis[IPI_TO_IDX(IPI_INVLPG)].filter = xen_invlpg_pcid; 532 } 533#endif 534 CPU_FOREACH(i) 535 xen_cpu_ipi_init(i); 536 537 /* Set the xen pv ipi ops to replace the native ones */ 538 cpu_ops.ipi_vectored = xen_ipi_vectored; 539} 540#endif 541 542/*---------------------- XEN Hypervisor Probe and Setup ----------------------*/ 543static uint32_t 544xen_hvm_cpuid_base(void) 545{ 546 uint32_t base, regs[4]; 547 548 for (base = 0x40000000; base < 0x40010000; base += 0x100) { 549 do_cpuid(base, regs); 550 if (!memcmp("XenVMMXenVMM", ®s[1], 12) 551 && (regs[0] - base) >= 2) 552 return (base); 553 } 554 return (0); 555} 556 557/* 558 * Allocate and fill in the hypcall page. 559 */ 560static int 561xen_hvm_init_hypercall_stubs(void) 562{ 563 uint32_t base, regs[4]; 564 int i; 565 566 base = xen_hvm_cpuid_base(); 567 if (base == 0) 568 return (ENXIO); 569 570 if (hypercall_stubs == NULL) { 571 do_cpuid(base + 1, regs); 572 printf("XEN: Hypervisor version %d.%d detected.\n", 573 regs[0] >> 16, regs[0] & 0xffff); 574 } 575 576 /* 577 * Find the hypercall pages. 578 */ 579 do_cpuid(base + 2, regs); 580 581 if (hypercall_stubs == NULL) { 582 size_t call_region_size; 583 584 call_region_size = regs[0] * PAGE_SIZE; 585 hypercall_stubs = malloc(call_region_size, M_XENHVM, M_NOWAIT); 586 if (hypercall_stubs == NULL) 587 panic("Unable to allocate Xen hypercall region"); 588 } 589 590 for (i = 0; i < regs[0]; i++) 591 wrmsr(regs[1], vtophys(hypercall_stubs + i * PAGE_SIZE) + i); 592 593 return (0); 594} 595 596static void 597xen_hvm_init_shared_info_page(void) 598{ 599 struct xen_add_to_physmap xatp; 600 601 if (HYPERVISOR_shared_info == NULL) { 602 HYPERVISOR_shared_info = malloc(PAGE_SIZE, M_XENHVM, M_NOWAIT); 603 if (HYPERVISOR_shared_info == NULL) 604 panic("Unable to allocate Xen shared info page"); 605 } 606 607 xatp.domid = DOMID_SELF; 608 xatp.idx = 0; 609 xatp.space = XENMAPSPACE_shared_info; 610 xatp.gpfn = vtophys(HYPERVISOR_shared_info) >> PAGE_SHIFT; 611 if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp)) 612 panic("HYPERVISOR_memory_op failed"); 613} 614 615/* 616 * Tell the hypervisor how to contact us for event channel callbacks. 617 */ 618void 619xen_hvm_set_callback(device_t dev) 620{ 621 struct xen_hvm_param xhp; 622 int irq; 623 624 if (xen_vector_callback_enabled) 625 return; 626 627 xhp.domid = DOMID_SELF; 628 xhp.index = HVM_PARAM_CALLBACK_IRQ; 629 if (xen_feature(XENFEAT_hvm_callback_vector) != 0) { 630 int error; 631 632 xhp.value = HVM_CALLBACK_VECTOR(IDT_EVTCHN); 633 error = HYPERVISOR_hvm_op(HVMOP_set_param, &xhp); 634 if (error == 0) { 635 xen_vector_callback_enabled = 1; 636 return; 637 } 638 printf("Xen HVM callback vector registration failed (%d). " 639 "Falling back to emulated device interrupt\n", error); 640 } 641 xen_vector_callback_enabled = 0; 642 if (dev == NULL) { 643 /* 644 * Called from early boot or resume. 645 * xenpci will invoke us again later. 646 */ 647 return; 648 } 649 650 irq = pci_get_irq(dev); 651 if (irq < 16) { 652 xhp.value = HVM_CALLBACK_GSI(irq); 653 } else { 654 u_int slot; 655 u_int pin; 656 657 slot = pci_get_slot(dev); 658 pin = pci_get_intpin(dev) - 1; 659 xhp.value = HVM_CALLBACK_PCI_INTX(slot, pin); 660 } 661 662 if (HYPERVISOR_hvm_op(HVMOP_set_param, &xhp) != 0) 663 panic("Can't set evtchn callback"); 664} 665 666#define XEN_MAGIC_IOPORT 0x10 667enum { 668 XMI_MAGIC = 0x49d2, 669 XMI_UNPLUG_IDE_DISKS = 0x01, 670 XMI_UNPLUG_NICS = 0x02, 671 XMI_UNPLUG_IDE_EXCEPT_PRI_MASTER = 0x04 672}; 673 674static void 675xen_hvm_disable_emulated_devices(void) 676{ 677 if (inw(XEN_MAGIC_IOPORT) != XMI_MAGIC) 678 return; 679 680 if (bootverbose) 681 printf("XEN: Disabling emulated block and network devices\n"); 682 outw(XEN_MAGIC_IOPORT, XMI_UNPLUG_IDE_DISKS|XMI_UNPLUG_NICS); 683} 684 685static void 686xen_hvm_init(enum xen_hvm_init_type init_type) 687{ 688 int error; 689 int i; 690 691 if (init_type == XEN_HVM_INIT_CANCELLED_SUSPEND) 692 return; 693 694 error = xen_hvm_init_hypercall_stubs(); 695 696 switch (init_type) { 697 case XEN_HVM_INIT_COLD: 698 if (error != 0) 699 return; 700 701 setup_xen_features(); 702 cpu_ops = xen_hvm_cpu_ops; 703 vm_guest = VM_GUEST_XEN; 704 break; 705 case XEN_HVM_INIT_RESUME: 706 if (error != 0) 707 panic("Unable to init Xen hypercall stubs on resume"); 708 709 /* Clear stale vcpu_info. */ 710 CPU_FOREACH(i) 711 DPCPU_ID_SET(i, vcpu_info, NULL); 712 break; 713 default: 714 panic("Unsupported HVM initialization type"); 715 } 716 717 xen_vector_callback_enabled = 0; 718 xen_domain_type = XEN_HVM_DOMAIN; 719 xen_hvm_init_shared_info_page(); 720 xen_hvm_set_callback(NULL); 721 xen_hvm_disable_emulated_devices(); 722} 723 724void 725xen_hvm_suspend(void) 726{ 727} 728 729void 730xen_hvm_resume(bool suspend_cancelled) 731{ 732 733 xen_hvm_init(suspend_cancelled ? 734 XEN_HVM_INIT_CANCELLED_SUSPEND : XEN_HVM_INIT_RESUME); 735 736 /* Register vcpu_info area for CPU#0. */ 737 xen_hvm_cpu_init(); 738} 739 740static void 741xen_hvm_sysinit(void *arg __unused) 742{ 743 xen_hvm_init(XEN_HVM_INIT_COLD); 744} 745 746static void 747xen_set_vcpu_id(void) 748{ 749 struct pcpu *pc; 750 int i; 751 752 /* Set vcpu_id to acpi_id */ 753 CPU_FOREACH(i) { 754 pc = pcpu_find(i); 755 pc->pc_vcpu_id = pc->pc_acpi_id; 756 if (bootverbose) 757 printf("XEN: CPU %u has VCPU ID %u\n", 758 i, pc->pc_vcpu_id); 759 } 760} 761 762static void 763xen_hvm_cpu_init(void) 764{ 765 struct vcpu_register_vcpu_info info; 766 struct vcpu_info *vcpu_info; 767 int cpu, rc; 768 769 if (!xen_domain()) 770 return; 771 772 if (DPCPU_GET(vcpu_info) != NULL) { 773 /* 774 * vcpu_info is already set. We're resuming 775 * from a failed migration and our pre-suspend 776 * configuration is still valid. 777 */ 778 return; 779 } 780 781 vcpu_info = DPCPU_PTR(vcpu_local_info); 782 cpu = PCPU_GET(vcpu_id); 783 info.mfn = vtophys(vcpu_info) >> PAGE_SHIFT; 784 info.offset = vtophys(vcpu_info) - trunc_page(vtophys(vcpu_info)); 785 786 rc = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info); 787 if (rc != 0) 788 DPCPU_SET(vcpu_info, &HYPERVISOR_shared_info->vcpu_info[cpu]); 789 else 790 DPCPU_SET(vcpu_info, vcpu_info); 791} 792 793SYSINIT(xen_hvm_init, SI_SUB_HYPERVISOR, SI_ORDER_FIRST, xen_hvm_sysinit, NULL); 794#ifdef SMP 795SYSINIT(xen_setup_cpus, SI_SUB_SMP, SI_ORDER_FIRST, xen_setup_cpus, NULL); 796#endif 797SYSINIT(xen_hvm_cpu_init, SI_SUB_INTR, SI_ORDER_FIRST, xen_hvm_cpu_init, NULL); 798SYSINIT(xen_set_vcpu_id, SI_SUB_CPU, SI_ORDER_ANY, xen_set_vcpu_id, NULL); 799