2 * Intel Multiprocessor Specification 1.1 and 1.4
3 * compliant MP-table parsing routines.
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <linux/bootmem.h>
14 #include <linux/memblock.h>
15 #include <linux/kernel_stat.h>
16 #include <linux/mc146818rtc.h>
17 #include <linux/bitops.h>
18 #include <linux/acpi.h>
19 #include <linux/module.h>
20 #include <linux/smp.h>
21 #include <linux/pci.h>
24 #include <asm/mpspec.h>
25 #include <asm/pgalloc.h>
26 #include <asm/io_apic.h>
27 #include <asm/proto.h>
28 #include <asm/bios_ebda.h>
30 #include <asm/trampoline.h>
31 #include <asm/setup.h>
36 * Checksum an MP configuration block.
39 static int __init mpf_checksum(unsigned char *mp, int len)
49 int __init default_mpc_apic_id(struct mpc_cpu *m)
54 static void __init MP_processor_info(struct mpc_cpu *m)
57 char *bootup_cpu = "";
59 if (!(m->cpuflag & CPU_ENABLED)) {
64 apicid = x86_init.mpparse.mpc_apic_id(m);
66 if (m->cpuflag & CPU_BOOTPROCESSOR) {
67 bootup_cpu = " (Bootup-CPU)";
68 boot_cpu_physical_apicid = m->apicid;
71 printk(KERN_INFO "Processor #%d%s\n", m->apicid, bootup_cpu);
72 generic_processor_info(apicid, m->apicver);
75 #ifdef CONFIG_X86_IO_APIC
76 void __init default_mpc_oem_bus_info(struct mpc_bus *m, char *str)
78 memcpy(str, m->bustype, 6);
80 apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->busid, str);
83 static void __init MP_bus_info(struct mpc_bus *m)
87 x86_init.mpparse.mpc_oem_bus_info(m, str);
89 #if MAX_MP_BUSSES < 256
90 if (m->busid >= MAX_MP_BUSSES) {
91 printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
92 " is too large, max. supported is %d\n",
93 m->busid, str, MAX_MP_BUSSES - 1);
98 if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
99 set_bit(m->busid, mp_bus_not_pci);
100 #if defined(CONFIG_EISA) || defined(CONFIG_MCA)
101 mp_bus_id_to_type[m->busid] = MP_BUS_ISA;
103 } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
104 if (x86_init.mpparse.mpc_oem_pci_bus)
105 x86_init.mpparse.mpc_oem_pci_bus(m);
107 clear_bit(m->busid, mp_bus_not_pci);
108 #if defined(CONFIG_EISA) || defined(CONFIG_MCA)
109 mp_bus_id_to_type[m->busid] = MP_BUS_PCI;
110 } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
111 mp_bus_id_to_type[m->busid] = MP_BUS_EISA;
112 } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) {
113 mp_bus_id_to_type[m->busid] = MP_BUS_MCA;
116 printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
119 static void __init MP_ioapic_info(struct mpc_ioapic *m)
121 if (m->flags & MPC_APIC_USABLE)
122 mp_register_ioapic(m->apicid, m->apicaddr, gsi_top);
125 static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
127 apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
128 " IRQ %02x, APIC ID %x, APIC INT %02x\n",
129 mp_irq->irqtype, mp_irq->irqflag & 3,
130 (mp_irq->irqflag >> 2) & 3, mp_irq->srcbus,
131 mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq);
134 #else /* CONFIG_X86_IO_APIC */
135 static inline void __init MP_bus_info(struct mpc_bus *m) {}
136 static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {}
137 #endif /* CONFIG_X86_IO_APIC */
139 static void __init MP_lintsrc_info(struct mpc_lintsrc *m)
141 apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x,"
142 " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
143 m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbusid,
144 m->srcbusirq, m->destapic, m->destapiclint);
150 static int __init smp_check_mpc(struct mpc_table *mpc, char *oem, char *str)
153 if (memcmp(mpc->signature, MPC_SIGNATURE, 4)) {
154 printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n",
155 mpc->signature[0], mpc->signature[1],
156 mpc->signature[2], mpc->signature[3]);
159 if (mpf_checksum((unsigned char *)mpc, mpc->length)) {
160 printk(KERN_ERR "MPTABLE: checksum error!\n");
163 if (mpc->spec != 0x01 && mpc->spec != 0x04) {
164 printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
169 printk(KERN_ERR "MPTABLE: null local APIC address!\n");
172 memcpy(oem, mpc->oem, 8);
174 printk(KERN_INFO "MPTABLE: OEM ID: %s\n", oem);
176 memcpy(str, mpc->productid, 12);
179 printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
181 printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->lapic);
186 static void skip_entry(unsigned char **ptr, int *count, int size)
192 static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
194 printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n"
196 print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
197 1, mpc, mpc->length, 1);
200 void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { }
202 static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
207 int count = sizeof(*mpc);
208 unsigned char *mpt = ((unsigned char *)mpc) + count;
210 if (!smp_check_mpc(mpc, oem, str))
214 generic_mps_oem_check(mpc, oem, str);
216 /* Initialize the lapic mapping */
218 register_lapic_address(mpc->lapic);
224 x86_init.mpparse.smp_read_mpc_oem(mpc);
227 * Now process the configuration blocks.
229 x86_init.mpparse.mpc_record(0);
231 while (count < mpc->length) {
234 /* ACPI may have already provided this data */
236 MP_processor_info((struct mpc_cpu *)mpt);
237 skip_entry(&mpt, &count, sizeof(struct mpc_cpu));
240 MP_bus_info((struct mpc_bus *)mpt);
241 skip_entry(&mpt, &count, sizeof(struct mpc_bus));
244 MP_ioapic_info((struct mpc_ioapic *)mpt);
245 skip_entry(&mpt, &count, sizeof(struct mpc_ioapic));
248 mp_save_irq((struct mpc_intsrc *)mpt);
249 skip_entry(&mpt, &count, sizeof(struct mpc_intsrc));
252 MP_lintsrc_info((struct mpc_lintsrc *)mpt);
253 skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc));
257 smp_dump_mptable(mpc, mpt);
261 x86_init.mpparse.mpc_record(1);
265 printk(KERN_ERR "MPTABLE: no processors registered!\n");
266 return num_processors;
269 #ifdef CONFIG_X86_IO_APIC
271 static int __init ELCR_trigger(unsigned int irq)
275 port = 0x4d0 + (irq >> 3);
276 return (inb(port) >> (irq & 7)) & 1;
279 static void __init construct_default_ioirq_mptable(int mpc_default_type)
281 struct mpc_intsrc intsrc;
283 int ELCR_fallback = 0;
285 intsrc.type = MP_INTSRC;
286 intsrc.irqflag = 0; /* conforming */
288 intsrc.dstapic = mp_ioapics[0].apicid;
290 intsrc.irqtype = mp_INT;
293 * If true, we have an ISA/PCI system with no IRQ entries
294 * in the MP table. To prevent the PCI interrupts from being set up
295 * incorrectly, we try to use the ELCR. The sanity check to see if
296 * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
297 * never be level sensitive, so we simply see if the ELCR agrees.
298 * If it does, we assume it's valid.
300 if (mpc_default_type == 5) {
301 printk(KERN_INFO "ISA/PCI bus type with no IRQ information... "
302 "falling back to ELCR\n");
304 if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
306 printk(KERN_ERR "ELCR contains invalid data... "
310 "Using ELCR to identify PCI interrupts\n");
315 for (i = 0; i < 16; i++) {
316 switch (mpc_default_type) {
318 if (i == 0 || i == 13)
319 continue; /* IRQ0 & IRQ13 not connected */
323 continue; /* IRQ2 is never connected */
328 * If the ELCR indicates a level-sensitive interrupt, we
329 * copy that information over to the MP table in the
330 * irqflag field (level sensitive, active high polarity).
338 intsrc.srcbusirq = i;
339 intsrc.dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
340 mp_save_irq(&intsrc);
343 intsrc.irqtype = mp_ExtINT;
344 intsrc.srcbusirq = 0;
345 intsrc.dstirq = 0; /* 8259A to INTIN0 */
346 mp_save_irq(&intsrc);
350 static void __init construct_ioapic_table(int mpc_default_type)
352 struct mpc_ioapic ioapic;
357 switch (mpc_default_type) {
359 printk(KERN_ERR "???\nUnknown standard configuration %d\n",
364 memcpy(bus.bustype, "ISA ", 6);
369 memcpy(bus.bustype, "EISA ", 6);
373 memcpy(bus.bustype, "MCA ", 6);
376 if (mpc_default_type > 4) {
378 memcpy(bus.bustype, "PCI ", 6);
382 ioapic.type = MP_IOAPIC;
384 ioapic.apicver = mpc_default_type > 4 ? 0x10 : 0x01;
385 ioapic.flags = MPC_APIC_USABLE;
386 ioapic.apicaddr = IO_APIC_DEFAULT_PHYS_BASE;
387 MP_ioapic_info(&ioapic);
390 * We set up most of the low 16 IO-APIC pins according to MPS rules.
392 construct_default_ioirq_mptable(mpc_default_type);
395 static inline void __init construct_ioapic_table(int mpc_default_type) { }
398 static inline void __init construct_default_ISA_mptable(int mpc_default_type)
400 struct mpc_cpu processor;
401 struct mpc_lintsrc lintsrc;
402 int linttypes[2] = { mp_ExtINT, mp_NMI };
406 * local APIC has default address
408 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
411 * 2 CPUs, numbered 0 & 1.
413 processor.type = MP_PROCESSOR;
414 /* Either an integrated APIC or a discrete 82489DX. */
415 processor.apicver = mpc_default_type > 4 ? 0x10 : 0x01;
416 processor.cpuflag = CPU_ENABLED;
417 processor.cpufeature = (boot_cpu_data.x86 << 8) |
418 (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
419 processor.featureflag = boot_cpu_data.x86_capability[0];
420 processor.reserved[0] = 0;
421 processor.reserved[1] = 0;
422 for (i = 0; i < 2; i++) {
423 processor.apicid = i;
424 MP_processor_info(&processor);
427 construct_ioapic_table(mpc_default_type);
429 lintsrc.type = MP_LINTSRC;
430 lintsrc.irqflag = 0; /* conforming */
431 lintsrc.srcbusid = 0;
432 lintsrc.srcbusirq = 0;
433 lintsrc.destapic = MP_APIC_ALL;
434 for (i = 0; i < 2; i++) {
435 lintsrc.irqtype = linttypes[i];
436 lintsrc.destapiclint = i;
437 MP_lintsrc_info(&lintsrc);
441 static struct mpf_intel *mpf_found;
443 static unsigned long __init get_mpc_size(unsigned long physptr)
445 struct mpc_table *mpc;
448 mpc = early_ioremap(physptr, PAGE_SIZE);
450 early_iounmap(mpc, PAGE_SIZE);
451 apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", physptr, physptr + size);
456 static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
458 struct mpc_table *mpc;
461 size = get_mpc_size(mpf->physptr);
462 mpc = early_ioremap(mpf->physptr, size);
464 * Read the physical hardware table. Anything here will
465 * override the defaults.
467 if (!smp_read_mpc(mpc, early)) {
468 #ifdef CONFIG_X86_LOCAL_APIC
469 smp_found_config = 0;
471 printk(KERN_ERR "BIOS bug, MP table errors detected!...\n"
472 "... disabling SMP support. (tell your hw vendor)\n");
473 early_iounmap(mpc, size);
476 early_iounmap(mpc, size);
481 #ifdef CONFIG_X86_IO_APIC
483 * If there are no explicit MP IRQ entries, then we are
484 * broken. We set up most of the low 16 IO-APIC pins to
485 * ISA defaults and hope it will work.
487 if (!mp_irq_entries) {
490 printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
491 "using default mptable. (tell your hw vendor)\n");
495 memcpy(bus.bustype, "ISA ", 6);
498 construct_default_ioirq_mptable(0);
506 * Scan the memory blocks for an SMP configuration block.
508 void __init default_get_smp_config(unsigned int early)
510 struct mpf_intel *mpf = mpf_found;
515 if (acpi_lapic && early)
519 * MPS doesn't support hyperthreading, aka only have
520 * thread 0 apic id in MPS table
522 if (acpi_lapic && acpi_ioapic)
525 printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
527 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
528 if (mpf->feature2 & (1 << 7)) {
529 printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
532 printk(KERN_INFO " Virtual Wire compatibility mode.\n");
537 * Now see if we need to read further.
539 if (mpf->feature1 != 0) {
542 * local APIC has default address
544 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
548 printk(KERN_INFO "Default MP configuration #%d\n",
550 construct_default_ISA_mptable(mpf->feature1);
552 } else if (mpf->physptr) {
553 if (check_physptr(mpf, early))
559 printk(KERN_INFO "Processors: %d\n", num_processors);
561 * Only use the first configuration found.
565 static void __init smp_reserve_memory(struct mpf_intel *mpf)
567 unsigned long size = get_mpc_size(mpf->physptr);
569 memblock_x86_reserve_range(mpf->physptr, mpf->physptr+size, "* MP-table mpc");
572 static int __init smp_scan_config(unsigned long base, unsigned long length)
574 unsigned int *bp = phys_to_virt(base);
575 struct mpf_intel *mpf;
578 apic_printk(APIC_VERBOSE, "Scan SMP from %p for %ld bytes.\n",
580 BUILD_BUG_ON(sizeof(*mpf) != 16);
583 mpf = (struct mpf_intel *)bp;
584 if ((*bp == SMP_MAGIC_IDENT) &&
585 (mpf->length == 1) &&
586 !mpf_checksum((unsigned char *)bp, 16) &&
587 ((mpf->specification == 1)
588 || (mpf->specification == 4))) {
589 #ifdef CONFIG_X86_LOCAL_APIC
590 smp_found_config = 1;
594 printk(KERN_INFO "found SMP MP-table at [%p] %llx\n",
595 mpf, (u64)virt_to_phys(mpf));
597 mem = virt_to_phys(mpf);
598 memblock_x86_reserve_range(mem, mem + sizeof(*mpf), "* MP-table mpf");
600 smp_reserve_memory(mpf);
610 void __init default_find_smp_config(void)
612 unsigned int address;
615 * FIXME: Linux assumes you have 640K of base ram..
616 * this continues the error...
618 * 1) Scan the bottom 1K for a signature
619 * 2) Scan the top 1K of base RAM
620 * 3) Scan the 64K of bios
622 if (smp_scan_config(0x0, 0x400) ||
623 smp_scan_config(639 * 0x400, 0x400) ||
624 smp_scan_config(0xF0000, 0x10000))
627 * If it is an SMP machine we should know now, unless the
628 * configuration is in an EISA/MCA bus machine with an
629 * extended bios data area.
631 * there is a real-mode segmented pointer pointing to the
632 * 4K EBDA area at 0x40E, calculate and scan it here.
634 * NOTE! There are Linux loaders that will corrupt the EBDA
635 * area, and as such this kind of SMP config may be less
636 * trustworthy, simply because the SMP table may have been
637 * stomped on during early boot. These loaders are buggy and
640 * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
643 address = get_bios_ebda();
645 smp_scan_config(address, 0x400);
648 #ifdef CONFIG_X86_IO_APIC
649 static u8 __initdata irq_used[MAX_IRQ_SOURCES];
651 static int __init get_MP_intsrc_index(struct mpc_intsrc *m)
655 if (m->irqtype != mp_INT)
658 if (m->irqflag != 0x0f)
663 for (i = 0; i < mp_irq_entries; i++) {
664 if (mp_irqs[i].irqtype != mp_INT)
667 if (mp_irqs[i].irqflag != 0x0f)
670 if (mp_irqs[i].srcbus != m->srcbus)
672 if (mp_irqs[i].srcbusirq != m->srcbusirq)
675 /* already claimed */
686 #define SPARE_SLOT_NUM 20
688 static struct mpc_intsrc __initdata *m_spare[SPARE_SLOT_NUM];
690 static void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare)
694 apic_printk(APIC_VERBOSE, "OLD ");
695 print_mp_irq_info(m);
697 i = get_MP_intsrc_index(m);
699 memcpy(m, &mp_irqs[i], sizeof(*m));
700 apic_printk(APIC_VERBOSE, "NEW ");
701 print_mp_irq_info(&mp_irqs[i]);
705 /* legacy, do nothing */
708 if (*nr_m_spare < SPARE_SLOT_NUM) {
710 * not found (-1), or duplicated (-2) are invalid entries,
711 * we need to use the slot later
713 m_spare[*nr_m_spare] = m;
717 #else /* CONFIG_X86_IO_APIC */
719 inline void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) {}
720 #endif /* CONFIG_X86_IO_APIC */
723 check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length, int count)
727 if (!mpc_new_phys || count <= mpc_new_length) {
728 WARN(1, "update_mptable: No spare slots (length: %x)\n", count);
735 static int __init replace_intsrc_all(struct mpc_table *mpc,
736 unsigned long mpc_new_phys,
737 unsigned long mpc_new_length)
739 #ifdef CONFIG_X86_IO_APIC
742 int count = sizeof(*mpc);
744 unsigned char *mpt = ((unsigned char *)mpc) + count;
746 printk(KERN_INFO "mpc_length %x\n", mpc->length);
747 while (count < mpc->length) {
750 skip_entry(&mpt, &count, sizeof(struct mpc_cpu));
753 skip_entry(&mpt, &count, sizeof(struct mpc_bus));
756 skip_entry(&mpt, &count, sizeof(struct mpc_ioapic));
759 check_irq_src((struct mpc_intsrc *)mpt, &nr_m_spare);
760 skip_entry(&mpt, &count, sizeof(struct mpc_intsrc));
763 skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc));
767 smp_dump_mptable(mpc, mpt);
772 #ifdef CONFIG_X86_IO_APIC
773 for (i = 0; i < mp_irq_entries; i++) {
777 if (mp_irqs[i].irqtype != mp_INT)
780 if (mp_irqs[i].irqflag != 0x0f)
783 if (nr_m_spare > 0) {
784 apic_printk(APIC_VERBOSE, "*NEW* found\n");
786 memcpy(m_spare[nr_m_spare], &mp_irqs[i], sizeof(mp_irqs[i]));
787 m_spare[nr_m_spare] = NULL;
789 struct mpc_intsrc *m = (struct mpc_intsrc *)mpt;
790 count += sizeof(struct mpc_intsrc);
791 if (check_slot(mpc_new_phys, mpc_new_length, count) < 0)
793 memcpy(m, &mp_irqs[i], sizeof(*m));
795 mpt += sizeof(struct mpc_intsrc);
797 print_mp_irq_info(&mp_irqs[i]);
801 /* update checksum */
803 mpc->checksum -= mpf_checksum((unsigned char *)mpc, mpc->length);
808 int enable_update_mptable;
810 static int __init update_mptable_setup(char *str)
812 enable_update_mptable = 1;
818 early_param("update_mptable", update_mptable_setup);
820 static unsigned long __initdata mpc_new_phys;
821 static unsigned long mpc_new_length __initdata = 4096;
823 /* alloc_mptable or alloc_mptable=4k */
824 static int __initdata alloc_mptable;
825 static int __init parse_alloc_mptable_opt(char *p)
827 enable_update_mptable = 1;
834 mpc_new_length = memparse(p, &p);
837 early_param("alloc_mptable", parse_alloc_mptable_opt);
839 void __init early_reserve_e820_mpc_new(void)
841 if (enable_update_mptable && alloc_mptable) {
843 mpc_new_phys = early_reserve_e820(startt, mpc_new_length, 4);
847 static int __init update_mp_table(void)
851 struct mpf_intel *mpf;
852 struct mpc_table *mpc, *mpc_new;
854 if (!enable_update_mptable)
862 * Now see if we need to go further.
864 if (mpf->feature1 != 0)
870 mpc = phys_to_virt(mpf->physptr);
872 if (!smp_check_mpc(mpc, oem, str))
875 printk(KERN_INFO "mpf: %llx\n", (u64)virt_to_phys(mpf));
876 printk(KERN_INFO "physptr: %x\n", mpf->physptr);
878 if (mpc_new_phys && mpc->length > mpc_new_length) {
880 printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n",
885 unsigned char old, new;
886 /* check if we can change the postion */
888 old = mpf_checksum((unsigned char *)mpc, mpc->length);
889 mpc->checksum = 0xff;
890 new = mpf_checksum((unsigned char *)mpc, mpc->length);
892 printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n");
895 printk(KERN_INFO "use in-positon replacing\n");
897 mpf->physptr = mpc_new_phys;
898 mpc_new = phys_to_virt(mpc_new_phys);
899 memcpy(mpc_new, mpc, mpc->length);
901 /* check if we can modify that */
902 if (mpc_new_phys - mpf->physptr) {
903 struct mpf_intel *mpf_new;
904 /* steal 16 bytes from [0, 1k) */
905 printk(KERN_INFO "mpf new: %x\n", 0x400 - 16);
906 mpf_new = phys_to_virt(0x400 - 16);
907 memcpy(mpf_new, mpf, 16);
909 mpf->physptr = mpc_new_phys;
912 mpf->checksum -= mpf_checksum((unsigned char *)mpf, 16);
913 printk(KERN_INFO "physptr new: %x\n", mpf->physptr);
917 * only replace the one with mp_INT and
918 * MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW,
919 * already in mp_irqs , stored by ... and mp_config_acpi_gsi,
920 * may need pci=routeirq for all coverage
922 replace_intsrc_all(mpc, mpc_new_phys, mpc_new_length);
927 late_initcall(update_mp_table);