mp_machdep.c revision 193154
1182902Skmacy/*- 2182902Skmacy * Copyright (c) 1996, by Steve Passe 3182902Skmacy * Copyright (c) 2008, by Kip Macy 4182902Skmacy * All rights reserved. 5182902Skmacy * 6182902Skmacy * Redistribution and use in source and binary forms, with or without 7182902Skmacy * modification, are permitted provided that the following conditions 8182902Skmacy * are met: 9182902Skmacy * 1. Redistributions of source code must retain the above copyright 10182902Skmacy * notice, this list of conditions and the following disclaimer. 11182902Skmacy * 2. The name of the developer may NOT be used to endorse or promote products 12182902Skmacy * derived from this software without specific prior written permission. 13182902Skmacy * 14182902Skmacy * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15182902Skmacy * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16182902Skmacy * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17182902Skmacy * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18182902Skmacy * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19182902Skmacy * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20182902Skmacy * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21182902Skmacy * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22182902Skmacy * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23182902Skmacy * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24182902Skmacy * SUCH DAMAGE. 25182902Skmacy */ 26182902Skmacy 27182902Skmacy#include <sys/cdefs.h> 28182902Skmacy__FBSDID("$FreeBSD: head/sys/i386/xen/mp_machdep.c 193154 2009-05-31 08:11:39Z adrian $"); 29182902Skmacy 30182902Skmacy#include "opt_apic.h" 31182902Skmacy#include "opt_cpu.h" 32182902Skmacy#include "opt_kstack_pages.h" 33182902Skmacy#include "opt_mp_watchdog.h" 34182902Skmacy#include "opt_sched.h" 35182902Skmacy#include "opt_smp.h" 36182902Skmacy 37182902Skmacy#if !defined(lint) 38182902Skmacy#if !defined(SMP) 39182902Skmacy#error How did you get here? 40182902Skmacy#endif 41182902Skmacy 42182902Skmacy#ifndef DEV_APIC 43182902Skmacy#error The apic device is required for SMP, add "device apic" to your config file. 44182902Skmacy#endif 45182902Skmacy#if defined(CPU_DISABLE_CMPXCHG) && !defined(COMPILING_LINT) 46182902Skmacy#error SMP not supported with CPU_DISABLE_CMPXCHG 47182902Skmacy#endif 48182902Skmacy#endif /* not lint */ 49182902Skmacy 50182902Skmacy#include <sys/param.h> 51182902Skmacy#include <sys/systm.h> 52182902Skmacy#include <sys/bus.h> 53182902Skmacy#include <sys/cons.h> /* cngetc() */ 54182902Skmacy#ifdef GPROF 55182902Skmacy#include <sys/gmon.h> 56182902Skmacy#endif 57182902Skmacy#include <sys/kernel.h> 58182902Skmacy#include <sys/ktr.h> 59182902Skmacy#include <sys/lock.h> 60182902Skmacy#include <sys/malloc.h> 61182902Skmacy#include <sys/memrange.h> 62182902Skmacy#include <sys/mutex.h> 63182902Skmacy#include <sys/pcpu.h> 64182902Skmacy#include <sys/proc.h> 65182902Skmacy#include <sys/sched.h> 66182902Skmacy#include <sys/smp.h> 67182902Skmacy#include <sys/sysctl.h> 68182902Skmacy 69182902Skmacy#include <vm/vm.h> 70182902Skmacy#include <vm/vm_param.h> 71182902Skmacy#include <vm/pmap.h> 72182902Skmacy#include <vm/vm_kern.h> 73182902Skmacy#include <vm/vm_extern.h> 74182902Skmacy#include <vm/vm_page.h> 75182902Skmacy 76182902Skmacy#include <machine/apicreg.h> 77182902Skmacy#include <machine/md_var.h> 78182902Skmacy#include <machine/mp_watchdog.h> 79182902Skmacy#include <machine/pcb.h> 80182902Skmacy#include <machine/psl.h> 81182902Skmacy#include <machine/smp.h> 82182902Skmacy#include <machine/specialreg.h> 83182902Skmacy#include <machine/pcpu.h> 84182902Skmacy 85182902Skmacy 86182902Skmacy 87182902Skmacy#include <machine/xen/xen-os.h> 88186557Skmacy#include <xen/evtchn.h> 89186557Skmacy#include <xen/xen_intr.h> 90186557Skmacy#include <xen/hypervisor.h> 91182902Skmacy#include <xen/interface/vcpu.h> 92182902Skmacy 93182902Skmacy#define stop_cpus_with_nmi 0 94182902Skmacy 95182902Skmacy 96182902Skmacyint mp_naps; /* # of Applications processors */ 97182902Skmacyint boot_cpu_id = -1; /* designated BSP */ 98182902Skmacy 99182902Skmacyextern struct pcpu __pcpu[]; 100182902Skmacy 101182902Skmacystatic int bootAP; 102182902Skmacystatic union descriptor *bootAPgdt; 103182902Skmacy 104184112Skmacystatic char resched_name[NR_CPUS][15]; 105184112Skmacystatic char callfunc_name[NR_CPUS][15]; 106182902Skmacy 107182902Skmacy/* Free these after use */ 108182902Skmacyvoid *bootstacks[MAXCPU]; 109182902Skmacy 110182902Skmacy/* Hotwire a 0->4MB V==P mapping */ 111182902Skmacyextern pt_entry_t *KPTphys; 112182902Skmacy 113182902Skmacystruct pcb stoppcbs[MAXCPU]; 114182902Skmacy 115182902Skmacy/* Variables needed for SMP tlb shootdown. */ 116182902Skmacyvm_offset_t smp_tlb_addr1; 117182902Skmacyvm_offset_t smp_tlb_addr2; 118182902Skmacyvolatile int smp_tlb_wait; 119182902Skmacy 120184112Skmacytypedef void call_data_func_t(uintptr_t , uintptr_t); 121184112Skmacy 122182902Skmacystatic u_int logical_cpus; 123182902Skmacy 124182902Skmacy/* used to hold the AP's until we are ready to release them */ 125182902Skmacystatic struct mtx ap_boot_mtx; 126182902Skmacy 127182902Skmacy/* Set to 1 once we're ready to let the APs out of the pen. */ 128182902Skmacystatic volatile int aps_ready = 0; 129182902Skmacy 130182902Skmacy/* 131182902Skmacy * Store data from cpu_add() until later in the boot when we actually setup 132182902Skmacy * the APs. 133182902Skmacy */ 134182902Skmacystruct cpu_info { 135182902Skmacy int cpu_present:1; 136182902Skmacy int cpu_bsp:1; 137182902Skmacy int cpu_disabled:1; 138182902Skmacy} static cpu_info[MAX_APIC_ID + 1]; 139182902Skmacyint cpu_apic_ids[MAXCPU]; 140187966Sbzint apic_cpuids[MAX_APIC_ID + 1]; 141182902Skmacy 142182902Skmacy/* Holds pending bitmap based IPIs per CPU */ 143182902Skmacystatic volatile u_int cpu_ipi_pending[MAXCPU]; 144182902Skmacy 145191759Skmacystatic int cpu_logical; 146191759Skmacystatic int cpu_cores; 147191759Skmacy 148182902Skmacystatic void assign_cpu_ids(void); 149182902Skmacystatic void set_interrupt_apic_ids(void); 150182902Skmacyint start_all_aps(void); 151182902Skmacystatic int start_ap(int apic_id); 152182902Skmacystatic void release_aps(void *dummy); 153182902Skmacy 154182902Skmacystatic u_int hyperthreading_cpus; 155182902Skmacystatic cpumask_t hyperthreading_cpus_mask; 156182902Skmacy 157182902Skmacyextern void Xhypervisor_callback(void); 158182902Skmacyextern void failsafe_callback(void); 159184115Skmacyextern void pmap_lazyfix_action(void); 160182902Skmacy 161182902Skmacystruct cpu_group * 162182902Skmacycpu_topo(void) 163182902Skmacy{ 164182902Skmacy if (cpu_cores == 0) 165182902Skmacy cpu_cores = 1; 166182902Skmacy if (cpu_logical == 0) 167182902Skmacy cpu_logical = 1; 168182902Skmacy if (mp_ncpus % (cpu_cores * cpu_logical) != 0) { 169182902Skmacy printf("WARNING: Non-uniform processors.\n"); 170182902Skmacy printf("WARNING: Using suboptimal topology.\n"); 171182902Skmacy return (smp_topo_none()); 172182902Skmacy } 173182902Skmacy /* 174182902Skmacy * No multi-core or hyper-threaded. 175182902Skmacy */ 176182902Skmacy if (cpu_logical * cpu_cores == 1) 177182902Skmacy return (smp_topo_none()); 178182902Skmacy /* 179182902Skmacy * Only HTT no multi-core. 180182902Skmacy */ 181182902Skmacy if (cpu_logical > 1 && cpu_cores == 1) 182182902Skmacy return (smp_topo_1level(CG_SHARE_L1, cpu_logical, CG_FLAG_HTT)); 183182902Skmacy /* 184182902Skmacy * Only multi-core no HTT. 185182902Skmacy */ 186182902Skmacy if (cpu_cores > 1 && cpu_logical == 1) 187182902Skmacy return (smp_topo_1level(CG_SHARE_NONE, cpu_cores, 0)); 188182902Skmacy /* 189182902Skmacy * Both HTT and multi-core. 190182902Skmacy */ 191182902Skmacy return (smp_topo_2level(CG_SHARE_NONE, cpu_cores, 192182902Skmacy CG_SHARE_L1, cpu_logical, CG_FLAG_HTT)); 193182902Skmacy} 194182902Skmacy 195182902Skmacy/* 196182902Skmacy * Calculate usable address in base memory for AP trampoline code. 197182902Skmacy */ 198182902Skmacyu_int 199182902Skmacymp_bootaddress(u_int basemem) 200182902Skmacy{ 201182902Skmacy 202182902Skmacy return (basemem); 203182902Skmacy} 204182902Skmacy 205182902Skmacyvoid 206182902Skmacycpu_add(u_int apic_id, char boot_cpu) 207182902Skmacy{ 208182902Skmacy 209182902Skmacy if (apic_id > MAX_APIC_ID) { 210182902Skmacy panic("SMP: APIC ID %d too high", apic_id); 211182902Skmacy return; 212182902Skmacy } 213182902Skmacy KASSERT(cpu_info[apic_id].cpu_present == 0, ("CPU %d added twice", 214182902Skmacy apic_id)); 215182902Skmacy cpu_info[apic_id].cpu_present = 1; 216182902Skmacy if (boot_cpu) { 217182902Skmacy KASSERT(boot_cpu_id == -1, 218182902Skmacy ("CPU %d claims to be BSP, but CPU %d already is", apic_id, 219182902Skmacy boot_cpu_id)); 220182902Skmacy boot_cpu_id = apic_id; 221182902Skmacy cpu_info[apic_id].cpu_bsp = 1; 222182902Skmacy } 223182902Skmacy if (mp_ncpus < MAXCPU) 224182902Skmacy mp_ncpus++; 225182902Skmacy if (bootverbose) 226182902Skmacy printf("SMP: Added CPU %d (%s)\n", apic_id, boot_cpu ? "BSP" : 227182902Skmacy "AP"); 228182902Skmacy} 229182902Skmacy 230182902Skmacyvoid 231182902Skmacycpu_mp_setmaxid(void) 232182902Skmacy{ 233182902Skmacy 234182902Skmacy mp_maxid = MAXCPU - 1; 235182902Skmacy} 236182902Skmacy 237182902Skmacyint 238182902Skmacycpu_mp_probe(void) 239182902Skmacy{ 240182902Skmacy 241182902Skmacy /* 242182902Skmacy * Always record BSP in CPU map so that the mbuf init code works 243182902Skmacy * correctly. 244182902Skmacy */ 245182902Skmacy all_cpus = 1; 246182902Skmacy if (mp_ncpus == 0) { 247182902Skmacy /* 248182902Skmacy * No CPUs were found, so this must be a UP system. Setup 249182902Skmacy * the variables to represent a system with a single CPU 250182902Skmacy * with an id of 0. 251182902Skmacy */ 252182902Skmacy mp_ncpus = 1; 253182902Skmacy return (0); 254182902Skmacy } 255182902Skmacy 256182902Skmacy /* At least one CPU was found. */ 257182902Skmacy if (mp_ncpus == 1) { 258182902Skmacy /* 259182902Skmacy * One CPU was found, so this must be a UP system with 260182902Skmacy * an I/O APIC. 261182902Skmacy */ 262182902Skmacy return (0); 263182902Skmacy } 264182902Skmacy 265182902Skmacy /* At least two CPUs were found. */ 266182902Skmacy return (1); 267182902Skmacy} 268182902Skmacy 269182902Skmacy/* 270182902Skmacy * Initialize the IPI handlers and start up the AP's. 271182902Skmacy */ 272182902Skmacyvoid 273182902Skmacycpu_mp_start(void) 274182902Skmacy{ 275182902Skmacy int i; 276182902Skmacy 277182902Skmacy /* Initialize the logical ID to APIC ID table. */ 278182902Skmacy for (i = 0; i < MAXCPU; i++) { 279182902Skmacy cpu_apic_ids[i] = -1; 280182902Skmacy cpu_ipi_pending[i] = 0; 281182902Skmacy } 282182902Skmacy 283182902Skmacy /* Set boot_cpu_id if needed. */ 284182902Skmacy if (boot_cpu_id == -1) { 285182902Skmacy boot_cpu_id = PCPU_GET(apic_id); 286182902Skmacy cpu_info[boot_cpu_id].cpu_bsp = 1; 287182902Skmacy } else 288182902Skmacy KASSERT(boot_cpu_id == PCPU_GET(apic_id), 289182902Skmacy ("BSP's APIC ID doesn't match boot_cpu_id")); 290182902Skmacy cpu_apic_ids[0] = boot_cpu_id; 291187966Sbz apic_cpuids[boot_cpu_id] = 0; 292182902Skmacy 293182902Skmacy assign_cpu_ids(); 294182902Skmacy 295182902Skmacy /* Start each Application Processor */ 296182902Skmacy start_all_aps(); 297182902Skmacy 298182902Skmacy /* Setup the initial logical CPUs info. */ 299182902Skmacy logical_cpus = logical_cpus_mask = 0; 300182902Skmacy if (cpu_feature & CPUID_HTT) 301182902Skmacy logical_cpus = (cpu_procinfo & CPUID_HTT_CORES) >> 16; 302182902Skmacy 303182902Skmacy set_interrupt_apic_ids(); 304182902Skmacy} 305182902Skmacy 306182902Skmacy 307184112Skmacystatic void 308184112Skmacyiv_rendezvous(uintptr_t a, uintptr_t b) 309184112Skmacy{ 310184115Skmacy smp_rendezvous_action(); 311184112Skmacy} 312184112Skmacy 313184112Skmacystatic void 314184112Skmacyiv_invltlb(uintptr_t a, uintptr_t b) 315184112Skmacy{ 316184115Skmacy xen_tlb_flush(); 317184112Skmacy} 318184112Skmacy 319184112Skmacystatic void 320184112Skmacyiv_invlpg(uintptr_t a, uintptr_t b) 321184112Skmacy{ 322184115Skmacy xen_invlpg(a); 323184112Skmacy} 324184112Skmacy 325184112Skmacystatic void 326184112Skmacyiv_invlrng(uintptr_t a, uintptr_t b) 327184112Skmacy{ 328184115Skmacy vm_offset_t start = (vm_offset_t)a; 329184115Skmacy vm_offset_t end = (vm_offset_t)b; 330184115Skmacy 331184115Skmacy while (start < end) { 332184115Skmacy xen_invlpg(start); 333184115Skmacy start += PAGE_SIZE; 334184115Skmacy } 335184112Skmacy} 336184112Skmacy 337184115Skmacy 338184112Skmacystatic void 339184112Skmacyiv_invlcache(uintptr_t a, uintptr_t b) 340184112Skmacy{ 341184115Skmacy 342184115Skmacy wbinvd(); 343184198Skmacy atomic_add_int(&smp_tlb_wait, 1); 344184112Skmacy} 345184112Skmacy 346184112Skmacystatic void 347184112Skmacyiv_lazypmap(uintptr_t a, uintptr_t b) 348184112Skmacy{ 349184115Skmacy pmap_lazyfix_action(); 350184224Skmacy atomic_add_int(&smp_tlb_wait, 1); 351184112Skmacy} 352184112Skmacy 353193154Sadrian/* 354193154Sadrian * These start from "IPI offset" APIC_IPI_INTS 355193154Sadrian */ 356193154Sadrianstatic call_data_func_t *ipi_vectors[6] = 357184112Skmacy{ 358184224Skmacy iv_rendezvous, 359184224Skmacy iv_invltlb, 360184224Skmacy iv_invlpg, 361184224Skmacy iv_invlrng, 362184224Skmacy iv_invlcache, 363184224Skmacy iv_lazypmap, 364184224Skmacy}; 365184224Skmacy 366184224Skmacy/* 367184224Skmacy * Reschedule call back. Nothing to do, 368184224Skmacy * all the work is done automatically when 369184224Skmacy * we return from the interrupt. 370184224Skmacy */ 371184224Skmacystatic int 372184224Skmacysmp_reschedule_interrupt(void *unused) 373184224Skmacy{ 374184198Skmacy int cpu = PCPU_GET(cpuid); 375184198Skmacy u_int ipi_bitmap; 376184198Skmacy 377184198Skmacy ipi_bitmap = atomic_readandclear_int(&cpu_ipi_pending[cpu]); 378184198Skmacy 379184198Skmacy if (ipi_bitmap & (1 << IPI_PREEMPT)) { 380184198Skmacy#ifdef COUNT_IPIS 381184198Skmacy (*ipi_preempt_counts[cpu])++; 382184198Skmacy#endif 383184198Skmacy sched_preempt(curthread); 384184198Skmacy } 385184198Skmacy 386184198Skmacy if (ipi_bitmap & (1 << IPI_AST)) { 387184198Skmacy#ifdef COUNT_IPIS 388184198Skmacy (*ipi_ast_counts[cpu])++; 389184198Skmacy#endif 390184198Skmacy /* Nothing to do for AST */ 391184198Skmacy } 392184198Skmacy return (FILTER_HANDLED); 393184112Skmacy} 394184112Skmacy 395184112Skmacystruct _call_data { 396184224Skmacy uint16_t func_id; 397184224Skmacy uint16_t wait; 398184112Skmacy uintptr_t arg1; 399184112Skmacy uintptr_t arg2; 400184112Skmacy atomic_t started; 401184112Skmacy atomic_t finished; 402184112Skmacy}; 403184112Skmacy 404184112Skmacystatic struct _call_data *call_data; 405184112Skmacy 406184198Skmacystatic int 407184112Skmacysmp_call_function_interrupt(void *unused) 408184112Skmacy{ 409184224Skmacy call_data_func_t *func; 410184112Skmacy uintptr_t arg1 = call_data->arg1; 411184112Skmacy uintptr_t arg2 = call_data->arg2; 412184112Skmacy int wait = call_data->wait; 413184224Skmacy atomic_t *started = &call_data->started; 414184224Skmacy atomic_t *finished = &call_data->finished; 415184112Skmacy 416193154Sadrian /* We only handle function IPIs, not bitmap IPIs */ 417193154Sadrian if (call_data->func_id < APIC_IPI_INTS || call_data->func_id > IPI_BITMAP_VECTOR) 418184224Skmacy panic("invalid function id %u", call_data->func_id); 419184224Skmacy 420193154Sadrian func = ipi_vectors[call_data->func_id - APIC_IPI_INTS]; 421184112Skmacy /* 422184112Skmacy * Notify initiating CPU that I've grabbed the data and am 423184112Skmacy * about to execute the function 424184112Skmacy */ 425184112Skmacy mb(); 426184224Skmacy atomic_inc(started); 427184112Skmacy /* 428184112Skmacy * At this point the info structure may be out of scope unless wait==1 429184112Skmacy */ 430184112Skmacy (*func)(arg1, arg2); 431184112Skmacy 432184112Skmacy if (wait) { 433184112Skmacy mb(); 434184224Skmacy atomic_inc(finished); 435184112Skmacy } 436184224Skmacy atomic_add_int(&smp_tlb_wait, 1); 437184198Skmacy return (FILTER_HANDLED); 438184112Skmacy} 439184112Skmacy 440184112Skmacy/* 441182902Skmacy * Print various information about the SMP system hardware and setup. 442182902Skmacy */ 443182902Skmacyvoid 444182902Skmacycpu_mp_announce(void) 445182902Skmacy{ 446182902Skmacy int i, x; 447182902Skmacy 448182902Skmacy /* List CPUs */ 449182902Skmacy printf(" cpu0 (BSP): APIC ID: %2d\n", boot_cpu_id); 450182902Skmacy for (i = 1, x = 0; x <= MAX_APIC_ID; x++) { 451182902Skmacy if (!cpu_info[x].cpu_present || cpu_info[x].cpu_bsp) 452182902Skmacy continue; 453182902Skmacy if (cpu_info[x].cpu_disabled) 454182902Skmacy printf(" cpu (AP): APIC ID: %2d (disabled)\n", x); 455182902Skmacy else { 456182902Skmacy KASSERT(i < mp_ncpus, 457182902Skmacy ("mp_ncpus and actual cpus are out of whack")); 458182902Skmacy printf(" cpu%d (AP): APIC ID: %2d\n", i++, x); 459182902Skmacy } 460182902Skmacy } 461182902Skmacy} 462182902Skmacy 463184112Skmacystatic int 464184112Skmacyxen_smp_intr_init(unsigned int cpu) 465184112Skmacy{ 466184112Skmacy int rc; 467186557Skmacy unsigned int irq; 468186557Skmacy 469184112Skmacy per_cpu(resched_irq, cpu) = per_cpu(callfunc_irq, cpu) = -1; 470184112Skmacy 471184112Skmacy sprintf(resched_name[cpu], "resched%u", cpu); 472184112Skmacy rc = bind_ipi_to_irqhandler(RESCHEDULE_VECTOR, 473184112Skmacy cpu, 474184112Skmacy resched_name[cpu], 475184112Skmacy smp_reschedule_interrupt, 476186557Skmacy INTR_FAST|INTR_TYPE_TTY|INTR_MPSAFE, &irq); 477184112Skmacy 478193082Sadrian printf("[XEN] IPI cpu=%d irq=%d vector=RESCHEDULE_VECTOR (%d)\n", 479193082Sadrian cpu, irq, RESCHEDULE_VECTOR); 480184198Skmacy 481186557Skmacy per_cpu(resched_irq, cpu) = irq; 482184112Skmacy 483184112Skmacy sprintf(callfunc_name[cpu], "callfunc%u", cpu); 484184112Skmacy rc = bind_ipi_to_irqhandler(CALL_FUNCTION_VECTOR, 485184112Skmacy cpu, 486184112Skmacy callfunc_name[cpu], 487184112Skmacy smp_call_function_interrupt, 488186557Skmacy INTR_FAST|INTR_TYPE_TTY|INTR_MPSAFE, &irq); 489184112Skmacy if (rc < 0) 490184112Skmacy goto fail; 491186557Skmacy per_cpu(callfunc_irq, cpu) = irq; 492184112Skmacy 493193082Sadrian printf("[XEN] IPI cpu=%d irq=%d vector=CALL_FUNCTION_VECTOR (%d)\n", 494193082Sadrian cpu, irq, CALL_FUNCTION_VECTOR); 495184198Skmacy 496184198Skmacy 497184112Skmacy if ((cpu != 0) && ((rc = ap_cpu_initclocks(cpu)) != 0)) 498184112Skmacy goto fail; 499184112Skmacy 500184112Skmacy return 0; 501184112Skmacy 502184112Skmacy fail: 503184112Skmacy if (per_cpu(resched_irq, cpu) >= 0) 504186557Skmacy unbind_from_irqhandler(per_cpu(resched_irq, cpu)); 505184112Skmacy if (per_cpu(callfunc_irq, cpu) >= 0) 506186557Skmacy unbind_from_irqhandler(per_cpu(callfunc_irq, cpu)); 507184112Skmacy return rc; 508184112Skmacy} 509184112Skmacy 510184198Skmacystatic void 511184198Skmacyxen_smp_intr_init_cpus(void *unused) 512184198Skmacy{ 513184198Skmacy int i; 514184198Skmacy 515184198Skmacy for (i = 0; i < mp_ncpus; i++) 516184198Skmacy xen_smp_intr_init(i); 517184198Skmacy} 518184198Skmacy 519182902Skmacy#define MTOPSIZE (1<<(14 + PAGE_SHIFT)) 520182902Skmacy 521182902Skmacy/* 522182902Skmacy * AP CPU's call this to initialize themselves. 523182902Skmacy */ 524182902Skmacyvoid 525182902Skmacyinit_secondary(void) 526182902Skmacy{ 527182902Skmacy vm_offset_t addr; 528182902Skmacy int gsel_tss; 529182902Skmacy 530182902Skmacy 531182902Skmacy /* bootAP is set in start_ap() to our ID. */ 532182902Skmacy PCPU_SET(currentldt, _default_ldt); 533182902Skmacy gsel_tss = GSEL(GPROC0_SEL, SEL_KPL); 534182902Skmacy#if 0 535182902Skmacy gdt[bootAP * NGDT + GPROC0_SEL].sd.sd_type = SDT_SYS386TSS; 536182902Skmacy#endif 537182902Skmacy PCPU_SET(common_tss.tss_esp0, 0); /* not used until after switch */ 538182902Skmacy PCPU_SET(common_tss.tss_ss0, GSEL(GDATA_SEL, SEL_KPL)); 539182902Skmacy PCPU_SET(common_tss.tss_ioopt, (sizeof (struct i386tss)) << 16); 540182902Skmacy#if 0 541182902Skmacy PCPU_SET(tss_gdt, &gdt[bootAP * NGDT + GPROC0_SEL].sd); 542182902Skmacy 543182902Skmacy PCPU_SET(common_tssd, *PCPU_GET(tss_gdt)); 544182902Skmacy#endif 545182902Skmacy PCPU_SET(fsgs_gdt, &gdt[GUFS_SEL].sd); 546182902Skmacy 547182902Skmacy /* 548182902Skmacy * Set to a known state: 549182902Skmacy * Set by mpboot.s: CR0_PG, CR0_PE 550182902Skmacy * Set by cpu_setregs: CR0_NE, CR0_MP, CR0_TS, CR0_WP, CR0_AM 551182902Skmacy */ 552182902Skmacy /* 553182902Skmacy * signal our startup to the BSP. 554182902Skmacy */ 555182902Skmacy mp_naps++; 556182902Skmacy 557182902Skmacy /* Spin until the BSP releases the AP's. */ 558182902Skmacy while (!aps_ready) 559182902Skmacy ia32_pause(); 560182902Skmacy 561182902Skmacy /* BSP may have changed PTD while we were waiting */ 562182902Skmacy invltlb(); 563182902Skmacy for (addr = 0; addr < NKPT * NBPDR - 1; addr += PAGE_SIZE) 564182902Skmacy invlpg(addr); 565182902Skmacy 566182902Skmacy /* set up FPU state on the AP */ 567189420Sjhb npxinit(); 568182902Skmacy#if 0 569182902Skmacy 570182902Skmacy /* set up SSE registers */ 571182902Skmacy enable_sse(); 572182902Skmacy#endif 573182902Skmacy#if 0 && defined(PAE) 574182902Skmacy /* Enable the PTE no-execute bit. */ 575182902Skmacy if ((amd_feature & AMDID_NX) != 0) { 576182902Skmacy uint64_t msr; 577182902Skmacy 578182902Skmacy msr = rdmsr(MSR_EFER) | EFER_NXE; 579182902Skmacy wrmsr(MSR_EFER, msr); 580182902Skmacy } 581182902Skmacy#endif 582182902Skmacy#if 0 583182902Skmacy /* A quick check from sanity claus */ 584182902Skmacy if (PCPU_GET(apic_id) != lapic_id()) { 585182902Skmacy printf("SMP: cpuid = %d\n", PCPU_GET(cpuid)); 586182902Skmacy printf("SMP: actual apic_id = %d\n", lapic_id()); 587182902Skmacy printf("SMP: correct apic_id = %d\n", PCPU_GET(apic_id)); 588182902Skmacy panic("cpuid mismatch! boom!!"); 589182902Skmacy } 590182902Skmacy#endif 591182902Skmacy 592182902Skmacy /* Initialize curthread. */ 593182902Skmacy KASSERT(PCPU_GET(idlethread) != NULL, ("no idle thread")); 594182902Skmacy PCPU_SET(curthread, PCPU_GET(idlethread)); 595182902Skmacy 596182902Skmacy mtx_lock_spin(&ap_boot_mtx); 597182902Skmacy#if 0 598182902Skmacy 599182902Skmacy /* Init local apic for irq's */ 600182902Skmacy lapic_setup(1); 601182902Skmacy#endif 602182902Skmacy smp_cpus++; 603182902Skmacy 604182902Skmacy CTR1(KTR_SMP, "SMP: AP CPU #%d Launched", PCPU_GET(cpuid)); 605182902Skmacy printf("SMP: AP CPU #%d Launched!\n", PCPU_GET(cpuid)); 606182902Skmacy 607182902Skmacy /* Determine if we are a logical CPU. */ 608182902Skmacy if (logical_cpus > 1 && PCPU_GET(apic_id) % logical_cpus != 0) 609182902Skmacy logical_cpus_mask |= PCPU_GET(cpumask); 610182902Skmacy 611182902Skmacy /* Determine if we are a hyperthread. */ 612182902Skmacy if (hyperthreading_cpus > 1 && 613182902Skmacy PCPU_GET(apic_id) % hyperthreading_cpus != 0) 614182902Skmacy hyperthreading_cpus_mask |= PCPU_GET(cpumask); 615182902Skmacy 616182902Skmacy /* Build our map of 'other' CPUs. */ 617182902Skmacy PCPU_SET(other_cpus, all_cpus & ~PCPU_GET(cpumask)); 618182902Skmacy#if 0 619182902Skmacy if (bootverbose) 620182902Skmacy lapic_dump("AP"); 621182902Skmacy#endif 622182902Skmacy if (smp_cpus == mp_ncpus) { 623182902Skmacy /* enable IPI's, tlb shootdown, freezes etc */ 624182902Skmacy atomic_store_rel_int(&smp_started, 1); 625182902Skmacy smp_active = 1; /* historic */ 626182902Skmacy } 627182902Skmacy 628182902Skmacy mtx_unlock_spin(&ap_boot_mtx); 629182902Skmacy 630182902Skmacy /* wait until all the AP's are up */ 631182902Skmacy while (smp_started == 0) 632182902Skmacy ia32_pause(); 633182902Skmacy 634183131Skmacy 635183131Skmacy PCPU_SET(curthread, PCPU_GET(idlethread)); 636182902Skmacy /* enter the scheduler */ 637182902Skmacy sched_throw(NULL); 638182902Skmacy 639182902Skmacy panic("scheduler returned us to %s", __func__); 640182902Skmacy /* NOTREACHED */ 641182902Skmacy} 642182902Skmacy 643182902Skmacy/******************************************************************* 644182902Skmacy * local functions and data 645182902Skmacy */ 646182902Skmacy 647182902Skmacy/* 648182902Skmacy * We tell the I/O APIC code about all the CPUs we want to receive 649182902Skmacy * interrupts. If we don't want certain CPUs to receive IRQs we 650182902Skmacy * can simply not tell the I/O APIC code about them in this function. 651182902Skmacy * We also do not tell it about the BSP since it tells itself about 652182902Skmacy * the BSP internally to work with UP kernels and on UP machines. 653182902Skmacy */ 654182902Skmacystatic void 655182902Skmacyset_interrupt_apic_ids(void) 656182902Skmacy{ 657182902Skmacy u_int i, apic_id; 658182902Skmacy 659182902Skmacy for (i = 0; i < MAXCPU; i++) { 660182902Skmacy apic_id = cpu_apic_ids[i]; 661182902Skmacy if (apic_id == -1) 662182902Skmacy continue; 663182902Skmacy if (cpu_info[apic_id].cpu_bsp) 664182902Skmacy continue; 665182902Skmacy if (cpu_info[apic_id].cpu_disabled) 666182902Skmacy continue; 667182902Skmacy 668182902Skmacy /* Don't let hyperthreads service interrupts. */ 669182902Skmacy if (hyperthreading_cpus > 1 && 670182902Skmacy apic_id % hyperthreading_cpus != 0) 671182902Skmacy continue; 672182902Skmacy 673182902Skmacy intr_add_cpu(i); 674182902Skmacy } 675182902Skmacy} 676182902Skmacy 677182902Skmacy/* 678182902Skmacy * Assign logical CPU IDs to local APICs. 679182902Skmacy */ 680182902Skmacystatic void 681182902Skmacyassign_cpu_ids(void) 682182902Skmacy{ 683182902Skmacy u_int i; 684182902Skmacy 685182902Skmacy /* Check for explicitly disabled CPUs. */ 686182902Skmacy for (i = 0; i <= MAX_APIC_ID; i++) { 687182902Skmacy if (!cpu_info[i].cpu_present || cpu_info[i].cpu_bsp) 688182902Skmacy continue; 689182902Skmacy 690182902Skmacy /* Don't use this CPU if it has been disabled by a tunable. */ 691182902Skmacy if (resource_disabled("lapic", i)) { 692182902Skmacy cpu_info[i].cpu_disabled = 1; 693182902Skmacy continue; 694182902Skmacy } 695182902Skmacy } 696182902Skmacy 697182902Skmacy /* 698182902Skmacy * Assign CPU IDs to local APIC IDs and disable any CPUs 699182902Skmacy * beyond MAXCPU. CPU 0 has already been assigned to the BSP, 700182902Skmacy * so we only have to assign IDs for APs. 701182902Skmacy */ 702182902Skmacy mp_ncpus = 1; 703182902Skmacy for (i = 0; i <= MAX_APIC_ID; i++) { 704182902Skmacy if (!cpu_info[i].cpu_present || cpu_info[i].cpu_bsp || 705182902Skmacy cpu_info[i].cpu_disabled) 706182902Skmacy continue; 707182902Skmacy 708182902Skmacy if (mp_ncpus < MAXCPU) { 709182902Skmacy cpu_apic_ids[mp_ncpus] = i; 710187966Sbz apic_cpuids[i] = mp_ncpus; 711182902Skmacy mp_ncpus++; 712182902Skmacy } else 713182902Skmacy cpu_info[i].cpu_disabled = 1; 714182902Skmacy } 715182902Skmacy KASSERT(mp_maxid >= mp_ncpus - 1, 716182902Skmacy ("%s: counters out of sync: max %d, count %d", __func__, mp_maxid, 717182902Skmacy mp_ncpus)); 718182902Skmacy} 719182902Skmacy 720182902Skmacy/* 721182902Skmacy * start each AP in our list 722182902Skmacy */ 723182902Skmacy/* Lowest 1MB is already mapped: don't touch*/ 724182902Skmacy#define TMPMAP_START 1 725182902Skmacyint 726182902Skmacystart_all_aps(void) 727182902Skmacy{ 728182902Skmacy int x,apic_id, cpu; 729182902Skmacy struct pcpu *pc; 730182902Skmacy 731182902Skmacy mtx_init(&ap_boot_mtx, "ap boot", NULL, MTX_SPIN); 732182902Skmacy 733182902Skmacy /* set up temporary P==V mapping for AP boot */ 734182902Skmacy /* XXX this is a hack, we should boot the AP on its own stack/PTD */ 735182902Skmacy 736182902Skmacy /* start each AP */ 737182902Skmacy for (cpu = 1; cpu < mp_ncpus; cpu++) { 738182902Skmacy apic_id = cpu_apic_ids[cpu]; 739182902Skmacy 740182902Skmacy 741182902Skmacy bootAP = cpu; 742182902Skmacy bootAPgdt = gdt + (512*cpu); 743182902Skmacy 744182902Skmacy /* Get per-cpu data */ 745182902Skmacy pc = &__pcpu[bootAP]; 746183132Skmacy pcpu_init(pc, bootAP, sizeof(struct pcpu)); 747182902Skmacy pc->pc_apic_id = cpu_apic_ids[bootAP]; 748182902Skmacy pc->pc_prvspace = pc; 749182902Skmacy pc->pc_curthread = 0; 750182902Skmacy 751182902Skmacy gdt_segs[GPRIV_SEL].ssd_base = (int) pc; 752182902Skmacy gdt_segs[GPROC0_SEL].ssd_base = (int) &pc->pc_common_tss; 753182902Skmacy 754182902Skmacy PT_SET_MA(bootAPgdt, xpmap_ptom(VTOP(bootAPgdt)) | PG_V | PG_RW); 755182902Skmacy bzero(bootAPgdt, PAGE_SIZE); 756182902Skmacy for (x = 0; x < NGDT; x++) 757182902Skmacy ssdtosd(&gdt_segs[x], &bootAPgdt[x].sd); 758182902Skmacy PT_SET_MA(bootAPgdt, vtomach(bootAPgdt) | PG_V); 759183345Skmacy#ifdef notyet 760183345Skmacy 761183345Skmacy if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0) { 762183345Skmacy apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id); 763183345Skmacy acpiid = xen_vcpu_physid_to_x86_acpiid(cpu_id.phys_id); 764183345Skmacy#ifdef CONFIG_ACPI 765183345Skmacy if (acpiid != 0xff) 766183345Skmacy x86_acpiid_to_apicid[acpiid] = apicid; 767183345Skmacy#endif 768183345Skmacy } 769183345Skmacy#endif 770183345Skmacy 771182902Skmacy /* attempt to start the Application Processor */ 772182902Skmacy if (!start_ap(cpu)) { 773182902Skmacy printf("AP #%d (PHY# %d) failed!\n", cpu, apic_id); 774182902Skmacy /* better panic as the AP may be running loose */ 775182902Skmacy printf("panic y/n? [y] "); 776182902Skmacy if (cngetc() != 'n') 777182902Skmacy panic("bye-bye"); 778182902Skmacy } 779182902Skmacy 780182902Skmacy all_cpus |= (1 << cpu); /* record AP in CPU map */ 781182902Skmacy } 782182902Skmacy 783182902Skmacy 784182902Skmacy /* build our map of 'other' CPUs */ 785182902Skmacy PCPU_SET(other_cpus, all_cpus & ~PCPU_GET(cpumask)); 786182902Skmacy 787182902Skmacy pmap_invalidate_range(kernel_pmap, 0, NKPT * NBPDR - 1); 788182902Skmacy 789182902Skmacy /* number of APs actually started */ 790182902Skmacy return mp_naps; 791182902Skmacy} 792182902Skmacy 793182902Skmacyextern uint8_t *pcpu_boot_stack; 794182902Skmacyextern trap_info_t trap_table[]; 795182902Skmacy 796182902Skmacystatic void 797182902Skmacysmp_trap_init(trap_info_t *trap_ctxt) 798182902Skmacy{ 799182902Skmacy const trap_info_t *t = trap_table; 800182902Skmacy 801182902Skmacy for (t = trap_table; t->address; t++) { 802182902Skmacy trap_ctxt[t->vector].flags = t->flags; 803182902Skmacy trap_ctxt[t->vector].cs = t->cs; 804182902Skmacy trap_ctxt[t->vector].address = t->address; 805182902Skmacy } 806182902Skmacy} 807182902Skmacy 808182902Skmacyextern int nkpt; 809184112Skmacystatic void 810182902Skmacycpu_initialize_context(unsigned int cpu) 811182902Skmacy{ 812182902Skmacy /* vcpu_guest_context_t is too large to allocate on the stack. 813182902Skmacy * Hence we allocate statically and protect it with a lock */ 814182902Skmacy vm_page_t m[4]; 815182902Skmacy static vcpu_guest_context_t ctxt; 816182902Skmacy vm_offset_t boot_stack; 817183131Skmacy vm_offset_t newPTD; 818183131Skmacy vm_paddr_t ma[NPGPTD]; 819182902Skmacy static int color; 820182902Skmacy int i; 821182902Skmacy 822182902Skmacy /* 823183131Skmacy * Page 0,[0-3] PTD 824183131Skmacy * Page 1, [4] boot stack 825183131Skmacy * Page [5] PDPT 826182902Skmacy * 827182902Skmacy */ 828183131Skmacy for (i = 0; i < NPGPTD + 2; i++) { 829182902Skmacy m[i] = vm_page_alloc(NULL, color++, 830182902Skmacy VM_ALLOC_NORMAL | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED | 831182902Skmacy VM_ALLOC_ZERO); 832182902Skmacy 833182902Skmacy pmap_zero_page(m[i]); 834182902Skmacy 835182902Skmacy } 836183131Skmacy boot_stack = kmem_alloc_nofault(kernel_map, 1); 837183131Skmacy newPTD = kmem_alloc_nofault(kernel_map, NPGPTD); 838183131Skmacy ma[0] = xpmap_ptom(VM_PAGE_TO_PHYS(m[0]))|PG_V; 839182902Skmacy 840183131Skmacy#ifdef PAE 841183131Skmacy pmap_kenter(boot_stack, VM_PAGE_TO_PHYS(m[NPGPTD + 1])); 842183131Skmacy for (i = 0; i < NPGPTD; i++) { 843183131Skmacy ((vm_paddr_t *)boot_stack)[i] = 844183131Skmacy ma[i] = 845183131Skmacy xpmap_ptom(VM_PAGE_TO_PHYS(m[i]))|PG_V; 846182902Skmacy } 847183131Skmacy#endif 848182902Skmacy 849182902Skmacy /* 850182902Skmacy * Copy cpu0 IdlePTD to new IdlePTD - copying only 851182902Skmacy * kernel mappings 852182902Skmacy */ 853183131Skmacy pmap_qenter(newPTD, m, 4); 854183131Skmacy 855183131Skmacy memcpy((uint8_t *)newPTD + KPTDI*sizeof(vm_paddr_t), 856183131Skmacy (uint8_t *)PTOV(IdlePTD) + KPTDI*sizeof(vm_paddr_t), 857182902Skmacy nkpt*sizeof(vm_paddr_t)); 858183131Skmacy 859183131Skmacy pmap_qremove(newPTD, 4); 860183131Skmacy kmem_free(kernel_map, newPTD, 4); 861182902Skmacy /* 862182902Skmacy * map actual idle stack to boot_stack 863182902Skmacy */ 864183131Skmacy pmap_kenter(boot_stack, VM_PAGE_TO_PHYS(m[NPGPTD])); 865182902Skmacy 866182902Skmacy 867183131Skmacy xen_pgdpt_pin(xpmap_ptom(VM_PAGE_TO_PHYS(m[NPGPTD + 1]))); 868182902Skmacy vm_page_lock_queues(); 869182902Skmacy for (i = 0; i < 4; i++) { 870183131Skmacy int pdir = (PTDPTDI + i) / NPDEPG; 871183131Skmacy int curoffset = (PTDPTDI + i) % NPDEPG; 872183131Skmacy 873182902Skmacy xen_queue_pt_update((vm_paddr_t) 874183131Skmacy ((ma[pdir] & ~PG_V) + (curoffset*sizeof(vm_paddr_t))), 875182902Skmacy ma[i]); 876182902Skmacy } 877182902Skmacy PT_UPDATES_FLUSH(); 878182902Skmacy vm_page_unlock_queues(); 879182902Skmacy 880182902Skmacy memset(&ctxt, 0, sizeof(ctxt)); 881182902Skmacy ctxt.flags = VGCF_IN_KERNEL; 882182902Skmacy ctxt.user_regs.ds = GSEL(GDATA_SEL, SEL_KPL); 883182902Skmacy ctxt.user_regs.es = GSEL(GDATA_SEL, SEL_KPL); 884182902Skmacy ctxt.user_regs.fs = GSEL(GPRIV_SEL, SEL_KPL); 885182902Skmacy ctxt.user_regs.gs = GSEL(GDATA_SEL, SEL_KPL); 886182902Skmacy ctxt.user_regs.cs = GSEL(GCODE_SEL, SEL_KPL); 887182902Skmacy ctxt.user_regs.ss = GSEL(GDATA_SEL, SEL_KPL); 888182902Skmacy ctxt.user_regs.eip = (unsigned long)init_secondary; 889182902Skmacy ctxt.user_regs.eflags = PSL_KERNEL | 0x1000; /* IOPL_RING1 */ 890182902Skmacy 891182902Skmacy memset(&ctxt.fpu_ctxt, 0, sizeof(ctxt.fpu_ctxt)); 892182902Skmacy 893182902Skmacy smp_trap_init(ctxt.trap_ctxt); 894182902Skmacy 895182902Skmacy ctxt.ldt_ents = 0; 896182902Skmacy ctxt.gdt_frames[0] = (uint32_t)((uint64_t)vtomach(bootAPgdt) >> PAGE_SHIFT); 897182902Skmacy ctxt.gdt_ents = 512; 898182902Skmacy 899182902Skmacy#ifdef __i386__ 900182902Skmacy ctxt.user_regs.esp = boot_stack + PAGE_SIZE; 901182902Skmacy 902182902Skmacy ctxt.kernel_ss = GSEL(GDATA_SEL, SEL_KPL); 903182902Skmacy ctxt.kernel_sp = boot_stack + PAGE_SIZE; 904182902Skmacy 905182902Skmacy ctxt.event_callback_cs = GSEL(GCODE_SEL, SEL_KPL); 906182902Skmacy ctxt.event_callback_eip = (unsigned long)Xhypervisor_callback; 907182902Skmacy ctxt.failsafe_callback_cs = GSEL(GCODE_SEL, SEL_KPL); 908182902Skmacy ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback; 909182902Skmacy 910183131Skmacy ctxt.ctrlreg[3] = xpmap_ptom(VM_PAGE_TO_PHYS(m[NPGPTD + 1])); 911182902Skmacy#else /* __x86_64__ */ 912182902Skmacy ctxt.user_regs.esp = idle->thread.rsp0 - sizeof(struct pt_regs); 913182902Skmacy ctxt.kernel_ss = GSEL(GDATA_SEL, SEL_KPL); 914182902Skmacy ctxt.kernel_sp = idle->thread.rsp0; 915182902Skmacy 916182902Skmacy ctxt.event_callback_eip = (unsigned long)hypervisor_callback; 917182902Skmacy ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback; 918182902Skmacy ctxt.syscall_callback_eip = (unsigned long)system_call; 919182902Skmacy 920182902Skmacy ctxt.ctrlreg[3] = xen_pfn_to_cr3(virt_to_mfn(init_level4_pgt)); 921182902Skmacy 922182902Skmacy ctxt.gs_base_kernel = (unsigned long)(cpu_pda(cpu)); 923182902Skmacy#endif 924182902Skmacy 925182902Skmacy printf("gdtpfn=%lx pdptpfn=%lx\n", 926182902Skmacy ctxt.gdt_frames[0], 927182902Skmacy ctxt.ctrlreg[3] >> PAGE_SHIFT); 928182902Skmacy 929182902Skmacy PANIC_IF(HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, &ctxt)); 930182902Skmacy DELAY(3000); 931182902Skmacy PANIC_IF(HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL)); 932182902Skmacy} 933182902Skmacy 934182902Skmacy/* 935182902Skmacy * This function starts the AP (application processor) identified 936182902Skmacy * by the APIC ID 'physicalCpu'. It does quite a "song and dance" 937182902Skmacy * to accomplish this. This is necessary because of the nuances 938182902Skmacy * of the different hardware we might encounter. It isn't pretty, 939182902Skmacy * but it seems to work. 940182902Skmacy */ 941183131Skmacy 942183131Skmacyint cpus; 943182902Skmacystatic int 944182902Skmacystart_ap(int apic_id) 945182902Skmacy{ 946182902Skmacy int ms; 947182902Skmacy 948182902Skmacy /* used as a watchpoint to signal AP startup */ 949182902Skmacy cpus = mp_naps; 950182902Skmacy 951182902Skmacy cpu_initialize_context(apic_id); 952182902Skmacy 953182902Skmacy /* Wait up to 5 seconds for it to start. */ 954182902Skmacy for (ms = 0; ms < 5000; ms++) { 955182902Skmacy if (mp_naps > cpus) 956182902Skmacy return 1; /* return SUCCESS */ 957182902Skmacy DELAY(1000); 958182902Skmacy } 959182902Skmacy return 0; /* return FAILURE */ 960182902Skmacy} 961182902Skmacy 962182902Skmacy/* 963182902Skmacy * Flush the TLB on all other CPU's 964182902Skmacy */ 965182902Skmacystatic void 966182902Skmacysmp_tlb_shootdown(u_int vector, vm_offset_t addr1, vm_offset_t addr2) 967182902Skmacy{ 968182902Skmacy u_int ncpu; 969184198Skmacy struct _call_data data; 970182902Skmacy 971182902Skmacy ncpu = mp_ncpus - 1; /* does not shootdown self */ 972182902Skmacy if (ncpu < 1) 973182902Skmacy return; /* no other cpus */ 974182902Skmacy if (!(read_eflags() & PSL_I)) 975182902Skmacy panic("%s: interrupts disabled", __func__); 976182902Skmacy mtx_lock_spin(&smp_ipi_mtx); 977193098Sadrian KASSERT(call_data == NULL, ("call_data isn't null?!")); 978193098Sadrian call_data = &data; 979184224Skmacy call_data->func_id = vector; 980184112Skmacy call_data->arg1 = addr1; 981184112Skmacy call_data->arg2 = addr2; 982182902Skmacy atomic_store_rel_int(&smp_tlb_wait, 0); 983182902Skmacy ipi_all_but_self(vector); 984182902Skmacy while (smp_tlb_wait < ncpu) 985182902Skmacy ia32_pause(); 986184224Skmacy call_data = NULL; 987182902Skmacy mtx_unlock_spin(&smp_ipi_mtx); 988182902Skmacy} 989182902Skmacy 990182902Skmacystatic void 991192114Sattiliosmp_targeted_tlb_shootdown(cpumask_t mask, u_int vector, vm_offset_t addr1, vm_offset_t addr2) 992182902Skmacy{ 993182902Skmacy int ncpu, othercpus; 994184224Skmacy struct _call_data data; 995182902Skmacy 996182902Skmacy othercpus = mp_ncpus - 1; 997182902Skmacy if (mask == (u_int)-1) { 998182902Skmacy ncpu = othercpus; 999182902Skmacy if (ncpu < 1) 1000182902Skmacy return; 1001182902Skmacy } else { 1002182902Skmacy mask &= ~PCPU_GET(cpumask); 1003182902Skmacy if (mask == 0) 1004182902Skmacy return; 1005182902Skmacy ncpu = bitcount32(mask); 1006182902Skmacy if (ncpu > othercpus) { 1007182902Skmacy /* XXX this should be a panic offence */ 1008182902Skmacy printf("SMP: tlb shootdown to %d other cpus (only have %d)\n", 1009182902Skmacy ncpu, othercpus); 1010182902Skmacy ncpu = othercpus; 1011182902Skmacy } 1012182902Skmacy /* XXX should be a panic, implied by mask == 0 above */ 1013182902Skmacy if (ncpu < 1) 1014182902Skmacy return; 1015182902Skmacy } 1016182902Skmacy if (!(read_eflags() & PSL_I)) 1017182902Skmacy panic("%s: interrupts disabled", __func__); 1018182902Skmacy mtx_lock_spin(&smp_ipi_mtx); 1019193098Sadrian KASSERT(call_data == NULL, ("call_data isn't null?!")); 1020184224Skmacy call_data = &data; 1021184224Skmacy call_data->func_id = vector; 1022184224Skmacy call_data->arg1 = addr1; 1023184224Skmacy call_data->arg2 = addr2; 1024182902Skmacy atomic_store_rel_int(&smp_tlb_wait, 0); 1025182902Skmacy if (mask == (u_int)-1) 1026182902Skmacy ipi_all_but_self(vector); 1027182902Skmacy else 1028182902Skmacy ipi_selected(mask, vector); 1029182902Skmacy while (smp_tlb_wait < ncpu) 1030182902Skmacy ia32_pause(); 1031184224Skmacy call_data = NULL; 1032182902Skmacy mtx_unlock_spin(&smp_ipi_mtx); 1033182902Skmacy} 1034182902Skmacy 1035182902Skmacyvoid 1036182902Skmacysmp_cache_flush(void) 1037182902Skmacy{ 1038182902Skmacy 1039182902Skmacy if (smp_started) 1040182902Skmacy smp_tlb_shootdown(IPI_INVLCACHE, 0, 0); 1041182902Skmacy} 1042182902Skmacy 1043182902Skmacyvoid 1044182902Skmacysmp_invltlb(void) 1045182902Skmacy{ 1046182902Skmacy 1047182902Skmacy if (smp_started) { 1048182902Skmacy smp_tlb_shootdown(IPI_INVLTLB, 0, 0); 1049182902Skmacy } 1050182902Skmacy} 1051182902Skmacy 1052182902Skmacyvoid 1053182902Skmacysmp_invlpg(vm_offset_t addr) 1054182902Skmacy{ 1055182902Skmacy 1056182902Skmacy if (smp_started) { 1057182902Skmacy smp_tlb_shootdown(IPI_INVLPG, addr, 0); 1058182902Skmacy } 1059182902Skmacy} 1060182902Skmacy 1061182902Skmacyvoid 1062182902Skmacysmp_invlpg_range(vm_offset_t addr1, vm_offset_t addr2) 1063182902Skmacy{ 1064182902Skmacy 1065182902Skmacy if (smp_started) { 1066182902Skmacy smp_tlb_shootdown(IPI_INVLRNG, addr1, addr2); 1067182902Skmacy } 1068182902Skmacy} 1069182902Skmacy 1070182902Skmacyvoid 1071192114Sattiliosmp_masked_invltlb(cpumask_t mask) 1072182902Skmacy{ 1073182902Skmacy 1074182902Skmacy if (smp_started) { 1075182902Skmacy smp_targeted_tlb_shootdown(mask, IPI_INVLTLB, 0, 0); 1076182902Skmacy } 1077182902Skmacy} 1078182902Skmacy 1079182902Skmacyvoid 1080192114Sattiliosmp_masked_invlpg(cpumask_t mask, vm_offset_t addr) 1081182902Skmacy{ 1082182902Skmacy 1083182902Skmacy if (smp_started) { 1084182902Skmacy smp_targeted_tlb_shootdown(mask, IPI_INVLPG, addr, 0); 1085182902Skmacy } 1086182902Skmacy} 1087182902Skmacy 1088182902Skmacyvoid 1089192114Sattiliosmp_masked_invlpg_range(cpumask_t mask, vm_offset_t addr1, vm_offset_t addr2) 1090182902Skmacy{ 1091182902Skmacy 1092182902Skmacy if (smp_started) { 1093182902Skmacy smp_targeted_tlb_shootdown(mask, IPI_INVLRNG, addr1, addr2); 1094182902Skmacy } 1095182902Skmacy} 1096182902Skmacy 1097182902Skmacy/* 1098182902Skmacy * send an IPI to a set of cpus. 1099182902Skmacy */ 1100182902Skmacyvoid 1101192114Sattilioipi_selected(cpumask_t cpus, u_int ipi) 1102182902Skmacy{ 1103182902Skmacy int cpu; 1104182902Skmacy u_int bitmap = 0; 1105182902Skmacy u_int old_pending; 1106182902Skmacy u_int new_pending; 1107184198Skmacy 1108182902Skmacy if (IPI_IS_BITMAPED(ipi)) { 1109182902Skmacy bitmap = 1 << ipi; 1110182902Skmacy ipi = IPI_BITMAP_VECTOR; 1111184224Skmacy } 1112182902Skmacy 1113182902Skmacy CTR3(KTR_SMP, "%s: cpus: %x ipi: %x", __func__, cpus, ipi); 1114182902Skmacy while ((cpu = ffs(cpus)) != 0) { 1115182902Skmacy cpu--; 1116182902Skmacy cpus &= ~(1 << cpu); 1117182902Skmacy 1118182902Skmacy KASSERT(cpu_apic_ids[cpu] != -1, 1119182902Skmacy ("IPI to non-existent CPU %d", cpu)); 1120182902Skmacy 1121182902Skmacy if (bitmap) { 1122182902Skmacy do { 1123182902Skmacy old_pending = cpu_ipi_pending[cpu]; 1124182902Skmacy new_pending = old_pending | bitmap; 1125182902Skmacy } while (!atomic_cmpset_int(&cpu_ipi_pending[cpu],old_pending, new_pending)); 1126182902Skmacy 1127184224Skmacy if (!old_pending) 1128184224Skmacy ipi_pcpu(cpu, RESCHEDULE_VECTOR); 1129184224Skmacy continue; 1130184224Skmacy 1131193094Sadrian } else { 1132193094Sadrian KASSERT(call_data != NULL, ("call_data not set")); 1133193094Sadrian ipi_pcpu(cpu, CALL_FUNCTION_VECTOR); 1134182902Skmacy } 1135182902Skmacy } 1136182902Skmacy} 1137182902Skmacy 1138182902Skmacy/* 1139182902Skmacy * send an IPI to all CPUs EXCEPT myself 1140182902Skmacy */ 1141182902Skmacyvoid 1142182902Skmacyipi_all_but_self(u_int ipi) 1143182902Skmacy{ 1144182902Skmacy CTR2(KTR_SMP, "%s: ipi: %x", __func__, ipi); 1145184224Skmacy ipi_selected(PCPU_GET(other_cpus), ipi); 1146182902Skmacy} 1147182902Skmacy 1148182902Skmacy/* 1149182902Skmacy * Handle an IPI_STOP by saving our current context and spinning until we 1150182902Skmacy * are resumed. 1151182902Skmacy */ 1152182902Skmacyvoid 1153182902Skmacycpustop_handler(void) 1154182902Skmacy{ 1155182902Skmacy int cpu = PCPU_GET(cpuid); 1156182902Skmacy int cpumask = PCPU_GET(cpumask); 1157182902Skmacy 1158182902Skmacy savectx(&stoppcbs[cpu]); 1159182902Skmacy 1160182902Skmacy /* Indicate that we are stopped */ 1161182902Skmacy atomic_set_int(&stopped_cpus, cpumask); 1162182902Skmacy 1163182902Skmacy /* Wait for restart */ 1164182902Skmacy while (!(started_cpus & cpumask)) 1165182902Skmacy ia32_pause(); 1166182902Skmacy 1167182902Skmacy atomic_clear_int(&started_cpus, cpumask); 1168182902Skmacy atomic_clear_int(&stopped_cpus, cpumask); 1169182902Skmacy 1170182902Skmacy if (cpu == 0 && cpustop_restartfunc != NULL) { 1171182902Skmacy cpustop_restartfunc(); 1172182902Skmacy cpustop_restartfunc = NULL; 1173182902Skmacy } 1174182902Skmacy} 1175182902Skmacy 1176182902Skmacy/* 1177182902Skmacy * This is called once the rest of the system is up and running and we're 1178182902Skmacy * ready to let the AP's out of the pen. 1179182902Skmacy */ 1180182902Skmacystatic void 1181182902Skmacyrelease_aps(void *dummy __unused) 1182182902Skmacy{ 1183182902Skmacy 1184182902Skmacy if (mp_ncpus == 1) 1185182902Skmacy return; 1186182902Skmacy atomic_store_rel_int(&aps_ready, 1); 1187182902Skmacy while (smp_started == 0) 1188182902Skmacy ia32_pause(); 1189182902Skmacy} 1190182902SkmacySYSINIT(start_aps, SI_SUB_SMP, SI_ORDER_FIRST, release_aps, NULL); 1191184198SkmacySYSINIT(start_ipis, SI_SUB_INTR, SI_ORDER_ANY, xen_smp_intr_init_cpus, NULL); 1192182902Skmacy 1193