2 * Copyright (c) 1996, by Steve Passe
3 * Copyright (c) 2003, by Peter Wemm
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. The name of the developer may NOT be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
34 #include "opt_kstack_pages.h"
36 #include "opt_sched.h"
39 #include <sys/param.h>
40 #include <sys/systm.h>
42 #include <sys/cons.h> /* cngetc() */
43 #include <sys/cpuset.h>
49 #include <sys/kernel.h>
52 #include <sys/malloc.h>
53 #include <sys/memrange.h>
54 #include <sys/mutex.h>
57 #include <sys/sched.h>
59 #include <sys/sysctl.h>
62 #include <vm/vm_param.h>
64 #include <vm/vm_kern.h>
65 #include <vm/vm_extern.h>
66 #include <vm/vm_map.h>
68 #include <x86/apicreg.h>
69 #include <machine/clock.h>
70 #include <machine/cpu.h>
71 #include <machine/cputypes.h>
73 #include <machine/md_var.h>
74 #include <machine/pcb.h>
75 #include <machine/psl.h>
76 #include <machine/smp.h>
77 #include <machine/specialreg.h>
78 #include <x86/ucode.h>
80 static MALLOC_DEFINE(M_CPUS, "cpus", "CPU items");
82 /* lock region used by kernel profiling */
85 int mp_naps; /* # of Applications processors */
86 int boot_cpu_id = -1; /* designated BSP */
88 /* AP uses this during bootstrap. Do not staticize. */
92 /* Free these after use */
93 void *bootstacks[MAXCPU];
96 struct pcb stoppcbs[MAXCPU];
97 struct susppcb **susppcbs;
100 /* Interrupt counts. */
101 static u_long *ipi_preempt_counts[MAXCPU];
102 static u_long *ipi_ast_counts[MAXCPU];
103 u_long *ipi_invltlb_counts[MAXCPU];
104 u_long *ipi_invlrng_counts[MAXCPU];
105 u_long *ipi_invlpg_counts[MAXCPU];
106 u_long *ipi_invlcache_counts[MAXCPU];
107 u_long *ipi_rendezvous_counts[MAXCPU];
108 static u_long *ipi_hardclock_counts[MAXCPU];
111 /* Default cpu_ops implementation. */
112 struct cpu_ops cpu_ops;
115 * Local data and functions.
118 static volatile cpuset_t ipi_stop_nmi_pending;
120 volatile cpuset_t resuming_cpus;
121 volatile cpuset_t toresume_cpus;
123 /* used to hold the AP's until we are ready to release them */
124 struct mtx ap_boot_mtx;
126 /* Set to 1 once we're ready to let the APs out of the pen. */
127 volatile int aps_ready = 0;
130 * Store data from cpu_add() until later in the boot when we actually setup
133 struct cpu_info *cpu_info;
135 int cpu_apic_ids[MAXCPU];
136 _Static_assert(MAXCPU <= MAX_APIC_ID,
137 "MAXCPU cannot be larger that MAX_APIC_ID");
138 _Static_assert(xAPIC_MAX_APIC_ID <= MAX_APIC_ID,
139 "xAPIC_MAX_APIC_ID cannot be larger that MAX_APIC_ID");
141 static void release_aps(void *dummy);
142 static void cpustop_handler_post(u_int cpu);
144 static int hyperthreading_allowed = 1;
145 SYSCTL_INT(_machdep, OID_AUTO, hyperthreading_allowed, CTLFLAG_RDTUN,
146 &hyperthreading_allowed, 0, "Use Intel HTT logical CPUs");
148 static int hyperthreading_intr_allowed = 0;
149 SYSCTL_INT(_machdep, OID_AUTO, hyperthreading_intr_allowed, CTLFLAG_RDTUN,
150 &hyperthreading_intr_allowed, 0,
151 "Allow interrupts on HTT logical CPUs");
153 static struct topo_node topo_root;
155 static int pkg_id_shift;
156 static int node_id_shift;
157 static int core_id_shift;
158 static int disabled_cpus;
163 } static caches[MAX_CACHE_LEVELS];
165 unsigned int boot_address;
167 static bool stop_mwait = false;
168 SYSCTL_BOOL(_machdep, OID_AUTO, stop_mwait, CTLFLAG_RWTUN, &stop_mwait, 0,
169 "Use MONITOR/MWAIT when stopping CPU, if available");
171 #define MiB(v) (v ## ULL << 20)
174 mem_range_AP_init(void)
177 if (mem_range_softc.mr_op && mem_range_softc.mr_op->initAP)
178 mem_range_softc.mr_op->initAP(&mem_range_softc);
182 * Round up to the next power of two, if necessary, and then
184 * Returns -1 if argument is zero.
190 return (fls(x << (1 - powerof2(x))) - 1);
194 * Add a cache level to the cache topology description.
197 add_deterministic_cache(int type, int level, int share_count)
203 printf("unexpected cache type %d\n", type);
206 if (type == 2) /* ignore instruction cache */
208 if (level == 0 || level > MAX_CACHE_LEVELS) {
209 printf("unexpected cache level %d\n", type);
213 if (caches[level - 1].present) {
214 printf("WARNING: multiple entries for L%u data cache\n", level);
215 printf("%u => %u\n", caches[level - 1].id_shift,
216 mask_width(share_count));
218 caches[level - 1].id_shift = mask_width(share_count);
219 caches[level - 1].present = 1;
221 if (caches[level - 1].id_shift > pkg_id_shift) {
222 printf("WARNING: L%u data cache covers more "
223 "APIC IDs than a package (%u > %u)\n", level,
224 caches[level - 1].id_shift, pkg_id_shift);
225 caches[level - 1].id_shift = pkg_id_shift;
227 if (caches[level - 1].id_shift < core_id_shift) {
228 printf("WARNING: L%u data cache covers fewer "
229 "APIC IDs than a core (%u < %u)\n", level,
230 caches[level - 1].id_shift, core_id_shift);
231 caches[level - 1].id_shift = core_id_shift;
238 * Determine topology of processing units and caches for AMD CPUs.
240 * - AMD CPUID Specification (Publication # 25481)
241 * - BKDG for AMD NPT Family 0Fh Processors (Publication # 32559)
242 * - BKDG For AMD Family 10h Processors (Publication # 31116)
243 * - BKDG For AMD Family 15h Models 00h-0Fh Processors (Publication # 42301)
244 * - BKDG For AMD Family 16h Models 00h-0Fh Processors (Publication # 48751)
245 * - PPR For AMD Family 17h Models 00h-0Fh Processors (Publication # 54945)
253 int nodes_per_socket;
258 /* No multi-core capability. */
259 if ((amd_feature2 & AMDID2_CMP) == 0)
262 /* For families 10h and newer. */
263 pkg_id_shift = (cpu_procinfo2 & AMDID_COREID_SIZE) >>
264 AMDID_COREID_SIZE_SHIFT;
266 /* For 0Fh family. */
267 if (pkg_id_shift == 0)
269 mask_width((cpu_procinfo2 & AMDID_CMP_CORES) + 1);
272 * Families prior to 16h define the following value as
273 * cores per compute unit and we don't really care about the AMD
274 * compute units at the moment. Perhaps we should treat them as
275 * cores and cores within the compute units as hardware threads,
276 * but that's up for debate.
277 * Later families define the value as threads per compute unit,
278 * so we are following AMD's nomenclature here.
280 if ((amd_feature2 & AMDID2_TOPOLOGY) != 0 &&
281 CPUID_TO_FAMILY(cpu_id) >= 0x16) {
282 cpuid_count(0x8000001e, 0, p);
283 share_count = ((p[1] >> 8) & 0xff) + 1;
284 core_id_shift = mask_width(share_count);
287 * For Zen (17h), gather Nodes per Processor. Each node is a
288 * Zeppelin die; TR and EPYC CPUs will have multiple dies per
289 * package. Communication latency between dies is higher than
292 nodes_per_socket = ((p[2] >> 8) & 0x7) + 1;
293 node_id_shift = pkg_id_shift - mask_width(nodes_per_socket);
296 if ((amd_feature2 & AMDID2_TOPOLOGY) != 0) {
298 cpuid_count(0x8000001d, i, p);
300 level = (p[0] >> 5) & 0x7;
301 share_count = 1 + ((p[0] >> 14) & 0xfff);
303 if (!add_deterministic_cache(type, level, share_count))
307 if (cpu_exthigh >= 0x80000005) {
308 cpuid_count(0x80000005, 0, p);
309 if (((p[2] >> 24) & 0xff) != 0) {
310 caches[0].id_shift = 0;
311 caches[0].present = 1;
314 if (cpu_exthigh >= 0x80000006) {
315 cpuid_count(0x80000006, 0, p);
316 if (((p[2] >> 16) & 0xffff) != 0) {
317 caches[1].id_shift = 0;
318 caches[1].present = 1;
320 if (((p[3] >> 18) & 0x3fff) != 0) {
321 nodes_per_socket = 1;
322 if ((amd_feature2 & AMDID2_NODE_ID) != 0) {
324 * Handle multi-node processors that
325 * have multiple chips, each with its
326 * own L3 cache, on the same die.
328 v = rdmsr(0xc001100c);
329 nodes_per_socket = 1 + ((v >> 3) & 0x7);
332 pkg_id_shift - mask_width(nodes_per_socket);
333 caches[2].present = 1;
340 * Determine topology of processing units for Intel CPUs
341 * using CPUID Leaf 1 and Leaf 4, if supported.
343 * - Intel 64 Architecture Processor Topology Enumeration
344 * - Intel 64 and IA-32 ArchitecturesSoftware Developer’s Manual,
345 * Volume 3A: System Programming Guide, PROGRAMMING CONSIDERATIONS
346 * FOR HARDWARE MULTI-THREADING CAPABLE PROCESSORS
349 topo_probe_intel_0x4(void)
355 /* Both zero and one here mean one logical processor per package. */
356 max_logical = (cpu_feature & CPUID_HTT) != 0 ?
357 (cpu_procinfo & CPUID_HTT_CORES) >> 16 : 1;
358 if (max_logical <= 1)
361 if (cpu_high >= 0x4) {
362 cpuid_count(0x04, 0, p);
363 max_cores = ((p[0] >> 26) & 0x3f) + 1;
367 core_id_shift = mask_width(max_logical/max_cores);
368 KASSERT(core_id_shift >= 0,
369 ("intel topo: max_cores > max_logical\n"));
370 pkg_id_shift = core_id_shift + mask_width(max_cores);
374 * Determine topology of processing units for Intel CPUs
375 * using CPUID Leaf 11, if supported.
377 * - Intel 64 Architecture Processor Topology Enumeration
378 * - Intel 64 and IA-32 ArchitecturesSoftware Developer’s Manual,
379 * Volume 3A: System Programming Guide, PROGRAMMING CONSIDERATIONS
380 * FOR HARDWARE MULTI-THREADING CAPABLE PROCESSORS
383 topo_probe_intel_0xb(void)
390 /* Fall back if CPU leaf 11 doesn't really exist. */
391 cpuid_count(0x0b, 0, p);
393 topo_probe_intel_0x4();
397 /* We only support three levels for now. */
399 cpuid_count(0x0b, i, p);
402 type = (p[2] >> 8) & 0xff;
407 /* TODO: check for duplicate (re-)assignment */
408 if (type == CPUID_TYPE_SMT)
409 core_id_shift = bits;
410 else if (type == CPUID_TYPE_CORE)
413 printf("unknown CPU level type %d\n", type);
416 if (pkg_id_shift < core_id_shift) {
417 printf("WARNING: core covers more APIC IDs than a package\n");
418 core_id_shift = pkg_id_shift;
423 * Determine topology of caches for Intel CPUs.
425 * - Intel 64 Architecture Processor Topology Enumeration
426 * - Intel 64 and IA-32 Architectures Software Developer’s Manual
427 * Volume 2A: Instruction Set Reference, A-M,
431 topo_probe_intel_caches(void)
439 if (cpu_high < 0x4) {
441 * Available cache level and sizes can be determined
442 * via CPUID leaf 2, but that requires a huge table of hardcoded
443 * values, so for now just assume L1 and L2 caches potentially
444 * shared only by HTT processing units, if HTT is present.
446 caches[0].id_shift = pkg_id_shift;
447 caches[0].present = 1;
448 caches[1].id_shift = pkg_id_shift;
449 caches[1].present = 1;
454 cpuid_count(0x4, i, p);
456 level = (p[0] >> 5) & 0x7;
457 share_count = 1 + ((p[0] >> 14) & 0xfff);
459 if (!add_deterministic_cache(type, level, share_count))
465 * Determine topology of processing units and caches for Intel CPUs.
467 * - Intel 64 Architecture Processor Topology Enumeration
470 topo_probe_intel(void)
474 * Note that 0x1 <= cpu_high < 4 case should be
475 * compatible with topo_probe_intel_0x4() logic when
476 * CPUID.1:EBX[23:16] > 0 (cpu_cores will be 1)
477 * or it should trigger the fallback otherwise.
480 topo_probe_intel_0xb();
481 else if (cpu_high >= 0x1)
482 topo_probe_intel_0x4();
484 topo_probe_intel_caches();
488 * Topology information is queried only on BSP, on which this
489 * code runs and for which it can query CPUID information.
490 * Then topology is extrapolated on all packages using an
491 * assumption that APIC ID to hardware component ID mapping is
493 * That doesn't necesserily imply that the topology is uniform.
498 static int cpu_topo_probed = 0;
499 struct x86_topo_layer {
503 } topo_layers[MAX_CACHE_LEVELS + 4];
504 struct topo_node *parent;
505 struct topo_node *node;
514 CPU_ZERO(&logical_cpus_mask);
518 else if (cpu_vendor_id == CPU_VENDOR_AMD ||
519 cpu_vendor_id == CPU_VENDOR_HYGON)
521 else if (cpu_vendor_id == CPU_VENDOR_INTEL)
524 KASSERT(pkg_id_shift >= core_id_shift,
525 ("bug in APIC topology discovery"));
528 bzero(topo_layers, sizeof(topo_layers));
530 topo_layers[nlayers].type = TOPO_TYPE_PKG;
531 topo_layers[nlayers].id_shift = pkg_id_shift;
533 printf("Package ID shift: %u\n", topo_layers[nlayers].id_shift);
536 if (pkg_id_shift > node_id_shift && node_id_shift != 0) {
537 topo_layers[nlayers].type = TOPO_TYPE_GROUP;
538 topo_layers[nlayers].id_shift = node_id_shift;
540 printf("Node ID shift: %u\n",
541 topo_layers[nlayers].id_shift);
546 * Consider all caches to be within a package/chip
547 * and "in front" of all sub-components like
548 * cores and hardware threads.
550 for (i = MAX_CACHE_LEVELS - 1; i >= 0; --i) {
551 if (caches[i].present) {
552 if (node_id_shift != 0)
553 KASSERT(caches[i].id_shift <= node_id_shift,
554 ("bug in APIC topology discovery"));
555 KASSERT(caches[i].id_shift <= pkg_id_shift,
556 ("bug in APIC topology discovery"));
557 KASSERT(caches[i].id_shift >= core_id_shift,
558 ("bug in APIC topology discovery"));
560 topo_layers[nlayers].type = TOPO_TYPE_CACHE;
561 topo_layers[nlayers].subtype = i + 1;
562 topo_layers[nlayers].id_shift = caches[i].id_shift;
564 printf("L%u cache ID shift: %u\n",
565 topo_layers[nlayers].subtype,
566 topo_layers[nlayers].id_shift);
571 if (pkg_id_shift > core_id_shift) {
572 topo_layers[nlayers].type = TOPO_TYPE_CORE;
573 topo_layers[nlayers].id_shift = core_id_shift;
575 printf("Core ID shift: %u\n",
576 topo_layers[nlayers].id_shift);
580 topo_layers[nlayers].type = TOPO_TYPE_PU;
581 topo_layers[nlayers].id_shift = 0;
584 topo_init_root(&topo_root);
585 for (i = 0; i <= max_apic_id; ++i) {
586 if (!cpu_info[i].cpu_present)
590 for (layer = 0; layer < nlayers; ++layer) {
591 node_id = i >> topo_layers[layer].id_shift;
592 parent = topo_add_node_by_hwid(parent, node_id,
593 topo_layers[layer].type,
594 topo_layers[layer].subtype);
599 for (layer = 0; layer < nlayers; ++layer) {
600 node_id = boot_cpu_id >> topo_layers[layer].id_shift;
601 node = topo_find_node_by_hwid(parent, node_id,
602 topo_layers[layer].type,
603 topo_layers[layer].subtype);
604 topo_promote_child(node);
612 * Assign logical CPU IDs to local APICs.
617 struct topo_node *node;
621 smt_mask = (1u << core_id_shift) - 1;
624 * Assign CPU IDs to local APIC IDs and disable any CPUs
625 * beyond MAXCPU. CPU 0 is always assigned to the BSP.
629 TOPO_FOREACH(node, &topo_root) {
630 if (node->type != TOPO_TYPE_PU)
633 if ((node->hwid & smt_mask) != (boot_cpu_id & smt_mask))
634 cpu_info[node->hwid].cpu_hyperthread = 1;
636 if (resource_disabled("lapic", node->hwid)) {
637 if (node->hwid != boot_cpu_id)
638 cpu_info[node->hwid].cpu_disabled = 1;
640 printf("Cannot disable BSP, APIC ID = %d\n",
644 if (!hyperthreading_allowed &&
645 cpu_info[node->hwid].cpu_hyperthread)
646 cpu_info[node->hwid].cpu_disabled = 1;
648 if (mp_ncpus >= MAXCPU)
649 cpu_info[node->hwid].cpu_disabled = 1;
651 if (cpu_info[node->hwid].cpu_disabled) {
656 if (cpu_info[node->hwid].cpu_hyperthread)
659 cpu_apic_ids[mp_ncpus] = node->hwid;
660 apic_cpuids[node->hwid] = mp_ncpus;
661 topo_set_pu_id(node, mp_ncpus);
665 KASSERT(mp_maxid >= mp_ncpus - 1,
666 ("%s: counters out of sync: max %d, count %d", __func__, mp_maxid,
669 mp_ncores = mp_ncpus - nhyper;
670 smp_threads_per_core = mp_ncpus / mp_ncores;
674 * Print various information about the SMP system hardware and setup.
677 cpu_mp_announce(void)
679 struct topo_node *node;
680 const char *hyperthread;
681 struct topo_analysis topology;
683 printf("FreeBSD/SMP: ");
684 if (topo_analyze(&topo_root, 1, &topology)) {
685 printf("%d package(s)", topology.entities[TOPO_LEVEL_PKG]);
686 if (topology.entities[TOPO_LEVEL_GROUP] > 1)
687 printf(" x %d groups",
688 topology.entities[TOPO_LEVEL_GROUP]);
689 if (topology.entities[TOPO_LEVEL_CACHEGROUP] > 1)
690 printf(" x %d cache groups",
691 topology.entities[TOPO_LEVEL_CACHEGROUP]);
692 if (topology.entities[TOPO_LEVEL_CORE] > 0)
693 printf(" x %d core(s)",
694 topology.entities[TOPO_LEVEL_CORE]);
695 if (topology.entities[TOPO_LEVEL_THREAD] > 1)
696 printf(" x %d hardware threads",
697 topology.entities[TOPO_LEVEL_THREAD]);
699 printf("Non-uniform topology");
704 printf("FreeBSD/SMP Online: ");
705 if (topo_analyze(&topo_root, 0, &topology)) {
706 printf("%d package(s)",
707 topology.entities[TOPO_LEVEL_PKG]);
708 if (topology.entities[TOPO_LEVEL_GROUP] > 1)
709 printf(" x %d groups",
710 topology.entities[TOPO_LEVEL_GROUP]);
711 if (topology.entities[TOPO_LEVEL_CACHEGROUP] > 1)
712 printf(" x %d cache groups",
713 topology.entities[TOPO_LEVEL_CACHEGROUP]);
714 if (topology.entities[TOPO_LEVEL_CORE] > 0)
715 printf(" x %d core(s)",
716 topology.entities[TOPO_LEVEL_CORE]);
717 if (topology.entities[TOPO_LEVEL_THREAD] > 1)
718 printf(" x %d hardware threads",
719 topology.entities[TOPO_LEVEL_THREAD]);
721 printf("Non-uniform topology");
729 TOPO_FOREACH(node, &topo_root) {
730 switch (node->type) {
732 printf("Package HW ID = %u\n", node->hwid);
735 printf("\tCore HW ID = %u\n", node->hwid);
738 if (cpu_info[node->hwid].cpu_hyperthread)
743 if (node->subtype == 0)
744 printf("\t\tCPU (AP%s): APIC ID: %u"
745 "(disabled)\n", hyperthread, node->hwid);
746 else if (node->id == 0)
747 printf("\t\tCPU0 (BSP): APIC ID: %u\n",
750 printf("\t\tCPU%u (AP%s): APIC ID: %u\n",
751 node->id, hyperthread, node->hwid);
761 * Add a scheduling group, a group of logical processors sharing
762 * a particular cache (and, thus having an affinity), to the scheduling
764 * This function recursively works on lower level caches.
767 x86topo_add_sched_group(struct topo_node *root, struct cpu_group *cg_root)
769 struct topo_node *node;
774 KASSERT(root->type == TOPO_TYPE_SYSTEM || root->type == TOPO_TYPE_CACHE ||
775 root->type == TOPO_TYPE_GROUP,
776 ("x86topo_add_sched_group: bad type: %u", root->type));
777 CPU_COPY(&root->cpuset, &cg_root->cg_mask);
778 cg_root->cg_count = root->cpu_count;
779 if (root->type == TOPO_TYPE_SYSTEM)
780 cg_root->cg_level = CG_SHARE_NONE;
782 cg_root->cg_level = root->subtype;
785 * Check how many core nodes we have under the given root node.
786 * If we have multiple logical processors, but not multiple
787 * cores, then those processors must be hardware threads.
791 while (node != NULL) {
792 if (node->type != TOPO_TYPE_CORE) {
793 node = topo_next_node(root, node);
798 node = topo_next_nonchild_node(root, node);
801 if (cg_root->cg_level != CG_SHARE_NONE &&
802 root->cpu_count > 1 && ncores < 2)
803 cg_root->cg_flags = CG_FLAG_SMT;
806 * Find out how many cache nodes we have under the given root node.
807 * We ignore cache nodes that cover all the same processors as the
808 * root node. Also, we do not descend below found cache nodes.
809 * That is, we count top-level "non-redundant" caches under the root
814 while (node != NULL) {
815 if ((node->type != TOPO_TYPE_GROUP &&
816 node->type != TOPO_TYPE_CACHE) ||
817 (root->type != TOPO_TYPE_SYSTEM &&
818 CPU_CMP(&node->cpuset, &root->cpuset) == 0)) {
819 node = topo_next_node(root, node);
823 node = topo_next_nonchild_node(root, node);
826 cg_root->cg_child = smp_topo_alloc(nchildren);
827 cg_root->cg_children = nchildren;
830 * Now find again the same cache nodes as above and recursively
831 * build scheduling topologies for them.
835 while (node != NULL) {
836 if ((node->type != TOPO_TYPE_GROUP &&
837 node->type != TOPO_TYPE_CACHE) ||
838 (root->type != TOPO_TYPE_SYSTEM &&
839 CPU_CMP(&node->cpuset, &root->cpuset) == 0)) {
840 node = topo_next_node(root, node);
843 cg_root->cg_child[i].cg_parent = cg_root;
844 x86topo_add_sched_group(node, &cg_root->cg_child[i]);
846 node = topo_next_nonchild_node(root, node);
851 * Build the MI scheduling topology from the discovered hardware topology.
856 struct cpu_group *cg_root;
859 return (smp_topo_none());
861 cg_root = smp_topo_alloc(1);
862 x86topo_add_sched_group(&topo_root, cg_root);
867 cpu_alloc(void *dummy __unused)
870 * Dynamically allocate the arrays that depend on the
873 cpu_info = malloc(sizeof(*cpu_info) * (max_apic_id + 1), M_CPUS,
875 apic_cpuids = malloc(sizeof(*apic_cpuids) * (max_apic_id + 1), M_CPUS,
878 SYSINIT(cpu_alloc, SI_SUB_CPU, SI_ORDER_FIRST, cpu_alloc, NULL);
881 * Add a logical CPU to the topology.
884 cpu_add(u_int apic_id, char boot_cpu)
887 if (apic_id > max_apic_id) {
888 panic("SMP: APIC ID %d too high", apic_id);
891 KASSERT(cpu_info[apic_id].cpu_present == 0, ("CPU %u added twice",
893 cpu_info[apic_id].cpu_present = 1;
895 KASSERT(boot_cpu_id == -1,
896 ("CPU %u claims to be BSP, but CPU %u already is", apic_id,
898 boot_cpu_id = apic_id;
899 cpu_info[apic_id].cpu_bsp = 1;
902 printf("SMP: Added CPU %u (%s)\n", apic_id, boot_cpu ? "BSP" :
907 cpu_mp_setmaxid(void)
911 * mp_ncpus and mp_maxid should be already set by calls to cpu_add().
912 * If there were no calls to cpu_add() assume this is a UP system.
923 * Always record BSP in CPU map so that the mbuf init code works
926 CPU_SETOF(0, &all_cpus);
927 return (mp_ncpus > 1);
930 /* Allocate memory for the AP trampoline. */
932 alloc_ap_trampoline(vm_paddr_t *physmap, unsigned int *physmap_idx)
938 for (i = *physmap_idx; i <= *physmap_idx; i -= 2) {
940 * Find a memory region big enough and below the 1MB boundary
941 * for the trampoline code.
942 * NB: needs to be page aligned.
944 if (physmap[i] >= MiB(1) ||
945 (trunc_page(physmap[i + 1]) - round_page(physmap[i])) <
946 round_page(bootMP_size))
951 * Try to steal from the end of the region to mimic previous
952 * behaviour, else fallback to steal from the start.
954 if (physmap[i + 1] < MiB(1)) {
955 boot_address = trunc_page(physmap[i + 1]);
956 if ((physmap[i + 1] - boot_address) < bootMP_size)
957 boot_address -= round_page(bootMP_size);
958 physmap[i + 1] = boot_address;
960 boot_address = round_page(physmap[i]);
961 physmap[i] = boot_address + round_page(bootMP_size);
963 if (physmap[i] == physmap[i + 1] && *physmap_idx != 0) {
964 memmove(&physmap[i], &physmap[i + 2],
965 sizeof(*physmap) * (*physmap_idx - i + 2));
972 boot_address = basemem * 1024 - bootMP_size;
975 "Cannot find enough space for the boot trampoline, placing it at %#x",
981 * AP CPU's call this to initialize themselves.
984 init_secondary_tail(void)
988 pmap_activate_boot(vmspace_pmap(proc0.p_vmspace));
991 * On real hardware, switch to x2apic mode if possible. Do it
992 * after aps_ready was signalled, to avoid manipulating the
993 * mode while BSP might still want to send some IPI to us
994 * (second startup IPI is ignored on modern hardware etc).
998 /* Initialize the PAT MSR. */
1001 /* set up CPU registers and state */
1007 /* set up FPU state on the AP */
1014 if (cpu_ops.cpu_init)
1017 /* A quick check from sanity claus */
1018 cpuid = PCPU_GET(cpuid);
1019 if (PCPU_GET(apic_id) != lapic_id()) {
1020 printf("SMP: cpuid = %d\n", cpuid);
1021 printf("SMP: actual apic_id = %d\n", lapic_id());
1022 printf("SMP: correct apic_id = %d\n", PCPU_GET(apic_id));
1023 panic("cpuid mismatch! boom!!");
1026 /* Initialize curthread. */
1027 KASSERT(PCPU_GET(idlethread) != NULL, ("no idle thread"));
1028 PCPU_SET(curthread, PCPU_GET(idlethread));
1030 mtx_lock_spin(&ap_boot_mtx);
1034 /* Init local apic for irq's */
1037 /* Set memory range attributes for this CPU to match the BSP */
1038 mem_range_AP_init();
1042 CTR1(KTR_SMP, "SMP: AP CPU #%d Launched", cpuid);
1044 printf("SMP: AP CPU #%d Launched!\n", cpuid);
1046 printf("%s%d%s", smp_cpus == 2 ? "Launching APs: " : "",
1047 cpuid, smp_cpus == mp_ncpus ? "\n" : " ");
1049 /* Determine if we are a logical CPU. */
1050 if (cpu_info[PCPU_GET(apic_id)].cpu_hyperthread)
1051 CPU_SET(cpuid, &logical_cpus_mask);
1056 if (smp_cpus == mp_ncpus) {
1057 /* enable IPI's, tlb shootdown, freezes etc */
1058 atomic_store_rel_int(&smp_started, 1);
1063 * Enable global pages TLB extension
1064 * This also implicitly flushes the TLB
1066 load_cr4(rcr4() | CR4_PGE);
1067 if (pmap_pcid_enabled)
1068 load_cr4(rcr4() | CR4_PCIDE);
1074 mtx_unlock_spin(&ap_boot_mtx);
1076 /* Wait until all the AP's are up. */
1077 while (atomic_load_acq_int(&smp_started) == 0)
1080 #ifndef EARLY_AP_STARTUP
1081 /* Start per-CPU event timers. */
1082 cpu_initclocks_ap();
1085 kcsan_cpu_init(cpuid);
1088 * Assert that smp_after_idle_runnable condition is reasonable.
1090 MPASS(PCPU_GET(curpcb) == NULL);
1094 panic("scheduler returned us to %s", __func__);
1099 smp_after_idle_runnable(void *arg __unused)
1104 for (cpu = 1; cpu < mp_ncpus; cpu++) {
1105 pc = pcpu_find(cpu);
1106 while (atomic_load_ptr(&pc->pc_curpcb) == (uintptr_t)NULL)
1108 kmem_free((vm_offset_t)bootstacks[cpu], kstack_pages *
1112 SYSINIT(smp_after_idle_runnable, SI_SUB_SMP, SI_ORDER_ANY,
1113 smp_after_idle_runnable, NULL);
1116 * We tell the I/O APIC code about all the CPUs we want to receive
1117 * interrupts. If we don't want certain CPUs to receive IRQs we
1118 * can simply not tell the I/O APIC code about them in this function.
1119 * We also do not tell it about the BSP since it tells itself about
1120 * the BSP internally to work with UP kernels and on UP machines.
1123 set_interrupt_apic_ids(void)
1127 for (i = 0; i < MAXCPU; i++) {
1128 apic_id = cpu_apic_ids[i];
1131 if (cpu_info[apic_id].cpu_bsp)
1133 if (cpu_info[apic_id].cpu_disabled)
1136 /* Don't let hyperthreads service interrupts. */
1137 if (cpu_info[apic_id].cpu_hyperthread &&
1138 !hyperthreading_intr_allowed)
1146 #ifdef COUNT_XINVLTLB_HITS
1147 u_int xhits_gbl[MAXCPU];
1148 u_int xhits_pg[MAXCPU];
1149 u_int xhits_rng[MAXCPU];
1150 static SYSCTL_NODE(_debug, OID_AUTO, xhits, CTLFLAG_RW, 0, "");
1151 SYSCTL_OPAQUE(_debug_xhits, OID_AUTO, global, CTLFLAG_RW, &xhits_gbl,
1152 sizeof(xhits_gbl), "IU", "");
1153 SYSCTL_OPAQUE(_debug_xhits, OID_AUTO, page, CTLFLAG_RW, &xhits_pg,
1154 sizeof(xhits_pg), "IU", "");
1155 SYSCTL_OPAQUE(_debug_xhits, OID_AUTO, range, CTLFLAG_RW, &xhits_rng,
1156 sizeof(xhits_rng), "IU", "");
1161 u_int ipi_range_size;
1162 SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_global, CTLFLAG_RW, &ipi_global, 0, "");
1163 SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_page, CTLFLAG_RW, &ipi_page, 0, "");
1164 SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_range, CTLFLAG_RW, &ipi_range, 0, "");
1165 SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_range_size, CTLFLAG_RW, &ipi_range_size,
1167 #endif /* COUNT_XINVLTLB_HITS */
1170 * Init and startup IPI.
1173 ipi_startup(int apic_id, int vector)
1177 * This attempts to follow the algorithm described in the
1178 * Intel Multiprocessor Specification v1.4 in section B.4.
1179 * For each IPI, we allow the local APIC ~20us to deliver the
1180 * IPI. If that times out, we panic.
1184 * first we do an INIT IPI: this INIT IPI might be run, resetting
1185 * and running the target CPU. OR this INIT IPI might be latched (P5
1186 * bug), CPU waiting for STARTUP IPI. OR this INIT IPI might be
1189 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_LEVEL |
1190 APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id);
1191 lapic_ipi_wait(100);
1193 /* Explicitly deassert the INIT IPI. */
1194 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_LEVEL |
1195 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT,
1198 DELAY(10000); /* wait ~10mS */
1201 * next we do a STARTUP IPI: the previous INIT IPI might still be
1202 * latched, (P5 bug) this 1st STARTUP would then terminate
1203 * immediately, and the previously started INIT IPI would continue. OR
1204 * the previous INIT IPI has already run. and this STARTUP IPI will
1205 * run. OR the previous INIT IPI was ignored. and this STARTUP IPI
1208 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
1209 APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
1211 if (!lapic_ipi_wait(100))
1212 panic("Failed to deliver first STARTUP IPI to APIC %d",
1214 DELAY(200); /* wait ~200uS */
1217 * finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF
1218 * the previous STARTUP IPI was cancelled by a latched INIT IPI. OR
1219 * this STARTUP IPI will be ignored, as only ONE STARTUP IPI is
1220 * recognized after hardware RESET or INIT IPI.
1222 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
1223 APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
1225 if (!lapic_ipi_wait(100))
1226 panic("Failed to deliver second STARTUP IPI to APIC %d",
1229 DELAY(200); /* wait ~200uS */
1233 * Send an IPI to specified CPU handling the bitmap logic.
1236 ipi_send_cpu(int cpu, u_int ipi)
1238 u_int bitmap, old, new;
1241 KASSERT((u_int)cpu < MAXCPU && cpu_apic_ids[cpu] != -1,
1242 ("IPI to non-existent CPU %d", cpu));
1244 if (IPI_IS_BITMAPED(ipi)) {
1246 ipi = IPI_BITMAP_VECTOR;
1247 cpu_bitmap = &cpuid_to_pcpu[cpu]->pc_ipi_bitmap;
1250 if ((old & bitmap) == bitmap)
1253 if (atomic_fcmpset_int(cpu_bitmap, &old, new))
1259 lapic_ipi_vectored(ipi, cpu_apic_ids[cpu]);
1263 ipi_bitmap_handler(struct trapframe frame)
1265 struct trapframe *oldframe;
1267 int cpu = PCPU_GET(cpuid);
1271 ipi_bitmap = atomic_readandclear_int(&cpuid_to_pcpu[cpu]->
1275 * sched_preempt() must be called to clear the pending preempt
1276 * IPI to enable delivery of further preempts. However, the
1277 * critical section will cause extra scheduler lock thrashing
1278 * when used unconditionally. Only critical_enter() if
1279 * hardclock must also run, which requires the section entry.
1281 if (ipi_bitmap & (1 << IPI_HARDCLOCK))
1284 td->td_intr_nesting_level++;
1285 oldframe = td->td_intr_frame;
1286 td->td_intr_frame = &frame;
1287 if (ipi_bitmap & (1 << IPI_PREEMPT)) {
1289 (*ipi_preempt_counts[cpu])++;
1293 if (ipi_bitmap & (1 << IPI_AST)) {
1295 (*ipi_ast_counts[cpu])++;
1297 /* Nothing to do for AST */
1299 if (ipi_bitmap & (1 << IPI_HARDCLOCK)) {
1301 (*ipi_hardclock_counts[cpu])++;
1305 td->td_intr_frame = oldframe;
1306 td->td_intr_nesting_level--;
1307 if (ipi_bitmap & (1 << IPI_HARDCLOCK))
1312 * send an IPI to a set of cpus.
1315 ipi_selected(cpuset_t cpus, u_int ipi)
1320 * IPI_STOP_HARD maps to a NMI and the trap handler needs a bit
1321 * of help in order to understand what is the source.
1322 * Set the mask of receiving CPUs for this purpose.
1324 if (ipi == IPI_STOP_HARD)
1325 CPU_OR_ATOMIC(&ipi_stop_nmi_pending, &cpus);
1327 while ((cpu = CPU_FFS(&cpus)) != 0) {
1329 CPU_CLR(cpu, &cpus);
1330 CTR3(KTR_SMP, "%s: cpu: %d ipi: %x", __func__, cpu, ipi);
1331 ipi_send_cpu(cpu, ipi);
1336 * send an IPI to a specific CPU.
1339 ipi_cpu(int cpu, u_int ipi)
1343 * IPI_STOP_HARD maps to a NMI and the trap handler needs a bit
1344 * of help in order to understand what is the source.
1345 * Set the mask of receiving CPUs for this purpose.
1347 if (ipi == IPI_STOP_HARD)
1348 CPU_SET_ATOMIC(cpu, &ipi_stop_nmi_pending);
1350 CTR3(KTR_SMP, "%s: cpu: %d ipi: %x", __func__, cpu, ipi);
1351 ipi_send_cpu(cpu, ipi);
1355 * send an IPI to all CPUs EXCEPT myself
1358 ipi_all_but_self(u_int ipi)
1360 cpuset_t other_cpus;
1362 other_cpus = all_cpus;
1363 CPU_CLR(PCPU_GET(cpuid), &other_cpus);
1364 if (IPI_IS_BITMAPED(ipi)) {
1365 ipi_selected(other_cpus, ipi);
1370 * IPI_STOP_HARD maps to a NMI and the trap handler needs a bit
1371 * of help in order to understand what is the source.
1372 * Set the mask of receiving CPUs for this purpose.
1374 if (ipi == IPI_STOP_HARD)
1375 CPU_OR_ATOMIC(&ipi_stop_nmi_pending, &other_cpus);
1377 CTR2(KTR_SMP, "%s: ipi: %x", __func__, ipi);
1378 lapic_ipi_vectored(ipi, APIC_IPI_DEST_OTHERS);
1382 ipi_nmi_handler(void)
1387 * As long as there is not a simple way to know about a NMI's
1388 * source, if the bitmask for the current CPU is present in
1389 * the global pending bitword an IPI_STOP_HARD has been issued
1390 * and should be handled.
1392 cpuid = PCPU_GET(cpuid);
1393 if (!CPU_ISSET(cpuid, &ipi_stop_nmi_pending))
1396 CPU_CLR_ATOMIC(cpuid, &ipi_stop_nmi_pending);
1404 nmi_call_kdb_smp(u_int type, struct trapframe *frame)
1409 cpu = PCPU_GET(cpuid);
1410 if (atomic_cmpset_acq_int(&nmi_kdb_lock, 0, 1)) {
1411 nmi_call_kdb(cpu, type, frame);
1414 savectx(&stoppcbs[cpu]);
1415 CPU_SET_ATOMIC(cpu, &stopped_cpus);
1416 while (!atomic_cmpset_acq_int(&nmi_kdb_lock, 0, 1))
1420 atomic_store_rel_int(&nmi_kdb_lock, 0);
1422 cpustop_handler_post(cpu);
1426 * Handle an IPI_STOP by saving our current context and spinning (or mwaiting,
1427 * if available) until we are resumed.
1430 cpustop_handler(void)
1432 struct monitorbuf *mb;
1436 cpu = PCPU_GET(cpuid);
1438 savectx(&stoppcbs[cpu]);
1440 use_mwait = (stop_mwait && (cpu_feature2 & CPUID2_MON) != 0 &&
1441 !mwait_cpustop_broken);
1443 mb = PCPU_PTR(monitorbuf);
1444 atomic_store_int(&mb->stop_state,
1445 MONITOR_STOPSTATE_STOPPED);
1448 /* Indicate that we are stopped */
1449 CPU_SET_ATOMIC(cpu, &stopped_cpus);
1451 /* Wait for restart */
1452 while (!CPU_ISSET(cpu, &started_cpus)) {
1454 cpu_monitor(mb, 0, 0);
1455 if (atomic_load_int(&mb->stop_state) ==
1456 MONITOR_STOPSTATE_STOPPED)
1457 cpu_mwait(0, MWAIT_C1);
1464 * Halt non-BSP CPUs on panic -- we're never going to need them
1465 * again, and might as well save power / release resources
1466 * (e.g., overprovisioned VM infrastructure).
1468 while (__predict_false(!IS_BSP() && KERNEL_PANICKED()))
1472 cpustop_handler_post(cpu);
1476 cpustop_handler_post(u_int cpu)
1479 CPU_CLR_ATOMIC(cpu, &started_cpus);
1480 CPU_CLR_ATOMIC(cpu, &stopped_cpus);
1483 * We don't broadcast TLB invalidations to other CPUs when they are
1484 * stopped. Hence, we clear the TLB before resuming.
1488 #if defined(__amd64__) && defined(DDB)
1489 amd64_db_resume_dbreg();
1492 if (cpu == 0 && cpustop_restartfunc != NULL) {
1493 cpustop_restartfunc();
1494 cpustop_restartfunc = NULL;
1499 * Handle an IPI_SUSPEND by saving our current context and spinning until we
1503 cpususpend_handler(void)
1507 mtx_assert(&smp_ipi_mtx, MA_NOTOWNED);
1509 cpu = PCPU_GET(cpuid);
1510 if (savectx(&susppcbs[cpu]->sp_pcb)) {
1512 fpususpend(susppcbs[cpu]->sp_fpususpend);
1514 npxsuspend(susppcbs[cpu]->sp_fpususpend);
1517 * suspended_cpus is cleared shortly after each AP is restarted
1518 * by a Startup IPI, so that the BSP can proceed to restarting
1521 * resuming_cpus gets cleared when the AP completes
1522 * initialization after having been released by the BSP.
1523 * resuming_cpus is probably not the best name for the
1524 * variable, because it is actually a set of processors that
1525 * haven't resumed yet and haven't necessarily started resuming.
1527 * Note that suspended_cpus is meaningful only for ACPI suspend
1528 * as it's not really used for Xen suspend since the APs are
1529 * automatically restored to the running state and the correct
1530 * context. For the same reason resumectx is never called in
1533 CPU_SET_ATOMIC(cpu, &suspended_cpus);
1534 CPU_SET_ATOMIC(cpu, &resuming_cpus);
1537 * Invalidate the cache after setting the global status bits.
1538 * The last AP to set its bit may end up being an Owner of the
1539 * corresponding cache line in MOESI protocol. The AP may be
1540 * stopped before the cache line is written to the main memory.
1545 fpuresume(susppcbs[cpu]->sp_fpususpend);
1547 npxresume(susppcbs[cpu]->sp_fpususpend);
1551 PCPU_SET(switchtime, 0);
1552 PCPU_SET(switchticks, ticks);
1554 /* Indicate that we have restarted and restored the context. */
1555 CPU_CLR_ATOMIC(cpu, &suspended_cpus);
1558 /* Wait for resume directive */
1559 while (!CPU_ISSET(cpu, &toresume_cpus))
1562 /* Re-apply microcode updates. */
1566 /* Finish removing the identity mapping of low memory for this AP. */
1570 if (cpu_ops.cpu_resume)
1571 cpu_ops.cpu_resume();
1577 /* Resume MCA and local APIC */
1582 /* Indicate that we are resumed */
1583 CPU_CLR_ATOMIC(cpu, &resuming_cpus);
1584 CPU_CLR_ATOMIC(cpu, &suspended_cpus);
1585 CPU_CLR_ATOMIC(cpu, &toresume_cpus);
1590 invlcache_handler(void)
1592 uint32_t generation;
1595 (*ipi_invlcache_counts[PCPU_GET(cpuid)])++;
1596 #endif /* COUNT_IPIS */
1599 * Reading the generation here allows greater parallelism
1600 * since wbinvd is a serializing instruction. Without the
1601 * temporary, we'd wait for wbinvd to complete, then the read
1602 * would execute, then the dependent write, which must then
1603 * complete before return from interrupt.
1605 generation = smp_tlb_generation;
1607 PCPU_SET(smp_tlb_done, generation);
1611 * This is called once the rest of the system is up and running and we're
1612 * ready to let the AP's out of the pen.
1615 release_aps(void *dummy __unused)
1620 atomic_store_rel_int(&aps_ready, 1);
1621 while (smp_started == 0)
1624 SYSINIT(start_aps, SI_SUB_SMP, SI_ORDER_FIRST, release_aps, NULL);
1628 * Setup interrupt counters for IPI handlers.
1631 mp_ipi_intrcnt(void *dummy)
1637 snprintf(buf, sizeof(buf), "cpu%d:invltlb", i);
1638 intrcnt_add(buf, &ipi_invltlb_counts[i]);
1639 snprintf(buf, sizeof(buf), "cpu%d:invlrng", i);
1640 intrcnt_add(buf, &ipi_invlrng_counts[i]);
1641 snprintf(buf, sizeof(buf), "cpu%d:invlpg", i);
1642 intrcnt_add(buf, &ipi_invlpg_counts[i]);
1643 snprintf(buf, sizeof(buf), "cpu%d:invlcache", i);
1644 intrcnt_add(buf, &ipi_invlcache_counts[i]);
1645 snprintf(buf, sizeof(buf), "cpu%d:preempt", i);
1646 intrcnt_add(buf, &ipi_preempt_counts[i]);
1647 snprintf(buf, sizeof(buf), "cpu%d:ast", i);
1648 intrcnt_add(buf, &ipi_ast_counts[i]);
1649 snprintf(buf, sizeof(buf), "cpu%d:rendezvous", i);
1650 intrcnt_add(buf, &ipi_rendezvous_counts[i]);
1651 snprintf(buf, sizeof(buf), "cpu%d:hardclock", i);
1652 intrcnt_add(buf, &ipi_hardclock_counts[i]);
1655 SYSINIT(mp_ipi_intrcnt, SI_SUB_INTR, SI_ORDER_MIDDLE, mp_ipi_intrcnt, NULL);
1659 * Flush the TLB on other CPU's
1662 /* Variables needed for SMP tlb shootdown. */
1663 vm_offset_t smp_tlb_addr1, smp_tlb_addr2;
1664 pmap_t smp_tlb_pmap;
1665 volatile uint32_t smp_tlb_generation;
1668 #define read_eflags() read_rflags()
1672 smp_targeted_tlb_shootdown(cpuset_t mask, u_int vector, pmap_t pmap,
1673 vm_offset_t addr1, vm_offset_t addr2)
1675 cpuset_t other_cpus;
1676 volatile uint32_t *p_cpudone;
1677 uint32_t generation;
1680 /* It is not necessary to signal other CPUs while in the debugger. */
1681 if (kdb_active || KERNEL_PANICKED())
1685 * Check for other cpus. Return if none.
1687 if (CPU_ISFULLSET(&mask)) {
1691 CPU_CLR(PCPU_GET(cpuid), &mask);
1692 if (CPU_EMPTY(&mask))
1696 if (!(read_eflags() & PSL_I))
1697 panic("%s: interrupts disabled", __func__);
1698 mtx_lock_spin(&smp_ipi_mtx);
1699 smp_tlb_addr1 = addr1;
1700 smp_tlb_addr2 = addr2;
1701 smp_tlb_pmap = pmap;
1702 generation = ++smp_tlb_generation;
1703 if (CPU_ISFULLSET(&mask)) {
1704 ipi_all_but_self(vector);
1705 other_cpus = all_cpus;
1706 CPU_CLR(PCPU_GET(cpuid), &other_cpus);
1709 while ((cpu = CPU_FFS(&mask)) != 0) {
1711 CPU_CLR(cpu, &mask);
1712 CTR3(KTR_SMP, "%s: cpu: %d ipi: %x", __func__,
1714 ipi_send_cpu(cpu, vector);
1717 while ((cpu = CPU_FFS(&other_cpus)) != 0) {
1719 CPU_CLR(cpu, &other_cpus);
1720 p_cpudone = &cpuid_to_pcpu[cpu]->pc_smp_tlb_done;
1721 while (*p_cpudone != generation)
1724 mtx_unlock_spin(&smp_ipi_mtx);
1728 smp_masked_invltlb(cpuset_t mask, pmap_t pmap)
1732 smp_targeted_tlb_shootdown(mask, IPI_INVLTLB, pmap, 0, 0);
1733 #ifdef COUNT_XINVLTLB_HITS
1740 smp_masked_invlpg(cpuset_t mask, vm_offset_t addr, pmap_t pmap)
1744 smp_targeted_tlb_shootdown(mask, IPI_INVLPG, pmap, addr, 0);
1745 #ifdef COUNT_XINVLTLB_HITS
1752 smp_masked_invlpg_range(cpuset_t mask, vm_offset_t addr1, vm_offset_t addr2,
1757 smp_targeted_tlb_shootdown(mask, IPI_INVLRNG, pmap,
1759 #ifdef COUNT_XINVLTLB_HITS
1761 ipi_range_size += (addr2 - addr1) / PAGE_SIZE;
1767 smp_cache_flush(void)
1771 smp_targeted_tlb_shootdown(all_cpus, IPI_INVLCACHE, NULL,
1777 * Handlers for TLB related IPIs
1780 invltlb_handler(void)
1782 uint32_t generation;
1784 #ifdef COUNT_XINVLTLB_HITS
1785 xhits_gbl[PCPU_GET(cpuid)]++;
1786 #endif /* COUNT_XINVLTLB_HITS */
1788 (*ipi_invltlb_counts[PCPU_GET(cpuid)])++;
1789 #endif /* COUNT_IPIS */
1792 * Reading the generation here allows greater parallelism
1793 * since invalidating the TLB is a serializing operation.
1795 generation = smp_tlb_generation;
1796 if (smp_tlb_pmap == kernel_pmap)
1802 PCPU_SET(smp_tlb_done, generation);
1806 invlpg_handler(void)
1808 uint32_t generation;
1810 #ifdef COUNT_XINVLTLB_HITS
1811 xhits_pg[PCPU_GET(cpuid)]++;
1812 #endif /* COUNT_XINVLTLB_HITS */
1814 (*ipi_invlpg_counts[PCPU_GET(cpuid)])++;
1815 #endif /* COUNT_IPIS */
1817 generation = smp_tlb_generation; /* Overlap with serialization */
1819 if (smp_tlb_pmap == kernel_pmap)
1821 invlpg(smp_tlb_addr1);
1822 PCPU_SET(smp_tlb_done, generation);
1826 invlrng_handler(void)
1828 vm_offset_t addr, addr2;
1829 uint32_t generation;
1831 #ifdef COUNT_XINVLTLB_HITS
1832 xhits_rng[PCPU_GET(cpuid)]++;
1833 #endif /* COUNT_XINVLTLB_HITS */
1835 (*ipi_invlrng_counts[PCPU_GET(cpuid)])++;
1836 #endif /* COUNT_IPIS */
1838 addr = smp_tlb_addr1;
1839 addr2 = smp_tlb_addr2;
1840 generation = smp_tlb_generation; /* Overlap with serialization */
1842 if (smp_tlb_pmap == kernel_pmap)
1847 } while (addr < addr2);
1849 PCPU_SET(smp_tlb_done, generation);