2 * Intel CPU Microcode Update Driver for Linux
4 * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
5 * 2006 Shaohua Li <shaohua.li@intel.com>
7 * Intel CPU microcode early update for Linux
9 * Copyright (C) 2012 Fenghua Yu <fenghua.yu@intel.com>
10 * H Peter Anvin" <hpa@zytor.com>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
19 * This needs to be before all headers so that pr_debug in printk.h doesn't turn
20 * printk calls into no_printk().
24 #define pr_fmt(fmt) "microcode: " fmt
26 #include <linux/earlycpio.h>
27 #include <linux/firmware.h>
28 #include <linux/uaccess.h>
29 #include <linux/vmalloc.h>
30 #include <linux/initrd.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
33 #include <linux/cpu.h>
36 #include <asm/microcode_intel.h>
37 #include <asm/processor.h>
38 #include <asm/tlbflush.h>
39 #include <asm/setup.h>
43 * Temporary microcode blobs pointers storage. We note here the pointers to
44 * microcode blobs we've got from whatever storage (detached initrd, builtin).
45 * Later on, we put those into final storage mc_saved_data.mc_saved.
47 static unsigned long mc_tmp_ptrs[MAX_UCODE_COUNT];
49 static struct mc_saved_data {
50 unsigned int num_saved;
51 struct microcode_intel **mc_saved;
54 static enum ucode_state
55 load_microcode_early(struct microcode_intel **saved,
56 unsigned int num_saved, struct ucode_cpu_info *uci)
58 struct microcode_intel *ucode_ptr, *new_mc = NULL;
59 struct microcode_header_intel *mc_hdr;
62 new_rev = uci->cpu_sig.rev;
64 for (i = 0; i < num_saved; i++) {
66 mc_hdr = (struct microcode_header_intel *)ucode_ptr;
68 ret = has_newer_microcode(ucode_ptr,
75 new_rev = mc_hdr->rev;
82 uci->mc = (struct microcode_intel *)new_mc;
87 copy_ptrs(struct microcode_intel **mc_saved, unsigned long *mc_ptrs,
88 unsigned long off, int num_saved)
92 for (i = 0; i < num_saved; i++)
93 mc_saved[i] = (struct microcode_intel *)(mc_ptrs[i] + off);
98 microcode_phys(struct microcode_intel **mc_saved_tmp, struct mc_saved_data *mcs)
101 struct microcode_intel ***mc_saved;
103 mc_saved = (struct microcode_intel ***)__pa_nodebug(&mcs->mc_saved);
105 for (i = 0; i < mcs->num_saved; i++) {
106 struct microcode_intel *p;
108 p = *(struct microcode_intel **)__pa_nodebug(mcs->mc_saved + i);
109 mc_saved_tmp[i] = (struct microcode_intel *)__pa_nodebug(p);
114 static enum ucode_state
115 load_microcode(struct mc_saved_data *mcs, unsigned long *mc_ptrs,
116 unsigned long offset, struct ucode_cpu_info *uci)
118 struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
119 unsigned int count = mcs->num_saved;
121 if (!mcs->mc_saved) {
122 copy_ptrs(mc_saved_tmp, mc_ptrs, offset, count);
124 return load_microcode_early(mc_saved_tmp, count, uci);
127 microcode_phys(mc_saved_tmp, mcs);
128 return load_microcode_early(mc_saved_tmp, count, uci);
130 return load_microcode_early(mcs->mc_saved, count, uci);
136 * Given CPU signature and a microcode patch, this function finds if the
137 * microcode patch has matching family and model with the CPU.
139 static enum ucode_state
140 matching_model_microcode(struct microcode_header_intel *mc_header,
143 unsigned int fam, model;
144 unsigned int fam_ucode, model_ucode;
145 struct extended_sigtable *ext_header;
146 unsigned long total_size = get_totalsize(mc_header);
147 unsigned long data_size = get_datasize(mc_header);
149 struct extended_signature *ext_sig;
151 fam = x86_family(sig);
152 model = x86_model(sig);
154 fam_ucode = x86_family(mc_header->sig);
155 model_ucode = x86_model(mc_header->sig);
157 if (fam == fam_ucode && model == model_ucode)
160 /* Look for ext. headers: */
161 if (total_size <= data_size + MC_HEADER_SIZE)
164 ext_header = (void *) mc_header + data_size + MC_HEADER_SIZE;
165 ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
166 ext_sigcount = ext_header->count;
168 for (i = 0; i < ext_sigcount; i++) {
169 fam_ucode = x86_family(ext_sig->sig);
170 model_ucode = x86_model(ext_sig->sig);
172 if (fam == fam_ucode && model == model_ucode)
181 save_microcode(struct mc_saved_data *mcs,
182 struct microcode_intel **mc_saved_src,
183 unsigned int num_saved)
186 struct microcode_intel **saved_ptr;
193 * Copy new microcode data.
195 saved_ptr = kcalloc(num_saved, sizeof(struct microcode_intel *), GFP_KERNEL);
199 for (i = 0; i < num_saved; i++) {
200 struct microcode_header_intel *mc_hdr;
201 struct microcode_intel *mc;
204 if (!mc_saved_src[i]) {
209 mc = mc_saved_src[i];
211 size = get_totalsize(mc_hdr);
213 saved_ptr[i] = kmalloc(size, GFP_KERNEL);
219 memcpy(saved_ptr[i], mc, size);
223 * Point to newly saved microcode.
225 mcs->mc_saved = saved_ptr;
226 mcs->num_saved = num_saved;
231 for (j = 0; j <= i; j++)
239 * A microcode patch in ucode_ptr is saved into mc_saved
240 * - if it has matching signature and newer revision compared to an existing
242 * - or if it is a newly discovered microcode patch.
244 * The microcode patch should have matching model with CPU.
246 * Returns: The updated number @num_saved of saved microcode patches.
248 static unsigned int _save_mc(struct microcode_intel **mc_saved,
249 u8 *ucode_ptr, unsigned int num_saved)
251 struct microcode_header_intel *mc_hdr, *mc_saved_hdr;
252 unsigned int sig, pf;
255 mc_hdr = (struct microcode_header_intel *)ucode_ptr;
257 for (i = 0; i < num_saved; i++) {
258 mc_saved_hdr = (struct microcode_header_intel *)mc_saved[i];
259 sig = mc_saved_hdr->sig;
260 pf = mc_saved_hdr->pf;
262 if (!find_matching_signature(ucode_ptr, sig, pf))
267 if (mc_hdr->rev <= mc_saved_hdr->rev)
271 * Found an older ucode saved earlier. Replace it with
274 mc_saved[i] = (struct microcode_intel *)ucode_ptr;
278 /* Newly detected microcode, save it to memory. */
279 if (i >= num_saved && !found)
280 mc_saved[num_saved++] = (struct microcode_intel *)ucode_ptr;
286 * Get microcode matching with BSP's model. Only CPUs with the same model as
287 * BSP can stay in the platform.
289 static enum ucode_state __init
290 get_matching_model_microcode(unsigned long start, void *data, size_t size,
291 struct mc_saved_data *mcs, unsigned long *mc_ptrs,
292 struct ucode_cpu_info *uci)
294 struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
295 struct microcode_header_intel *mc_header;
296 unsigned int num_saved = mcs->num_saved;
297 enum ucode_state state = UCODE_OK;
298 unsigned int leftover = size;
299 u8 *ucode_ptr = data;
300 unsigned int mc_size;
303 while (leftover && num_saved < ARRAY_SIZE(mc_saved_tmp)) {
305 if (leftover < sizeof(mc_header))
308 mc_header = (struct microcode_header_intel *)ucode_ptr;
310 mc_size = get_totalsize(mc_header);
311 if (!mc_size || mc_size > leftover ||
312 microcode_sanity_check(ucode_ptr, 0) < 0)
318 * Since APs with same family and model as the BSP may boot in
319 * the platform, we need to find and save microcode patches
320 * with the same family and model as the BSP.
322 if (matching_model_microcode(mc_header, uci->cpu_sig.sig) != UCODE_OK) {
323 ucode_ptr += mc_size;
327 num_saved = _save_mc(mc_saved_tmp, ucode_ptr, num_saved);
329 ucode_ptr += mc_size;
338 state = UCODE_NFOUND;
342 for (i = 0; i < num_saved; i++)
343 mc_ptrs[i] = (unsigned long)mc_saved_tmp[i] - start;
345 mcs->num_saved = num_saved;
350 static int collect_cpu_info_early(struct ucode_cpu_info *uci)
353 unsigned int family, model;
354 struct cpu_signature csig;
355 unsigned int eax, ebx, ecx, edx;
361 memset(uci, 0, sizeof(*uci));
365 native_cpuid(&eax, &ebx, &ecx, &edx);
368 family = x86_family(csig.sig);
369 model = x86_model(csig.sig);
371 if ((model >= 5) || (family > 6)) {
372 /* get processor flags from MSR 0x17 */
373 native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
374 csig.pf = 1 << ((val[1] >> 18) & 7);
376 native_wrmsrl(MSR_IA32_UCODE_REV, 0);
378 /* As documented in the SDM: Do a CPUID 1 here */
381 /* get the current revision from MSR 0x8B */
382 native_rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
392 static void show_saved_mc(void)
396 unsigned int sig, pf, rev, total_size, data_size, date;
397 struct ucode_cpu_info uci;
399 if (!mc_saved_data.num_saved) {
400 pr_debug("no microcode data saved.\n");
403 pr_debug("Total microcode saved: %d\n", mc_saved_data.num_saved);
405 collect_cpu_info_early(&uci);
407 sig = uci.cpu_sig.sig;
409 rev = uci.cpu_sig.rev;
410 pr_debug("CPU: sig=0x%x, pf=0x%x, rev=0x%x\n", sig, pf, rev);
412 for (i = 0; i < mc_saved_data.num_saved; i++) {
413 struct microcode_header_intel *mc_saved_header;
414 struct extended_sigtable *ext_header;
416 struct extended_signature *ext_sig;
418 mc_saved_header = (struct microcode_header_intel *)
419 mc_saved_data.mc_saved[i];
420 sig = mc_saved_header->sig;
421 pf = mc_saved_header->pf;
422 rev = mc_saved_header->rev;
423 total_size = get_totalsize(mc_saved_header);
424 data_size = get_datasize(mc_saved_header);
425 date = mc_saved_header->date;
427 pr_debug("mc_saved[%d]: sig=0x%x, pf=0x%x, rev=0x%x, toal size=0x%x, date = %04x-%02x-%02x\n",
428 i, sig, pf, rev, total_size,
431 (date >> 16) & 0xff);
433 /* Look for ext. headers: */
434 if (total_size <= data_size + MC_HEADER_SIZE)
437 ext_header = (void *) mc_saved_header + data_size + MC_HEADER_SIZE;
438 ext_sigcount = ext_header->count;
439 ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
441 for (j = 0; j < ext_sigcount; j++) {
445 pr_debug("\tExtended[%d]: sig=0x%x, pf=0x%x\n",
455 #ifdef CONFIG_HOTPLUG_CPU
456 static DEFINE_MUTEX(x86_cpu_microcode_mutex);
458 * Save this mc into mc_saved_data. So it will be loaded early when a CPU is
459 * hot added or resumes.
461 * Please make sure this mc should be a valid microcode patch before calling
464 int save_mc_for_early(u8 *mc)
466 struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
467 unsigned int mc_saved_count_init;
468 unsigned int num_saved;
469 struct microcode_intel **mc_saved;
474 * Hold hotplug lock so mc_saved_data is not accessed by a CPU in
477 mutex_lock(&x86_cpu_microcode_mutex);
479 mc_saved_count_init = mc_saved_data.num_saved;
480 num_saved = mc_saved_data.num_saved;
481 mc_saved = mc_saved_data.mc_saved;
483 if (mc_saved && num_saved)
484 memcpy(mc_saved_tmp, mc_saved,
485 num_saved * sizeof(struct microcode_intel *));
487 * Save the microcode patch mc in mc_save_tmp structure if it's a newer
490 num_saved = _save_mc(mc_saved_tmp, mc, num_saved);
493 * Save the mc_save_tmp in global mc_saved_data.
495 ret = save_microcode(&mc_saved_data, mc_saved_tmp, num_saved);
497 pr_err("Cannot save microcode patch.\n");
504 * Free old saved microcode data.
507 for (i = 0; i < mc_saved_count_init; i++)
513 mutex_unlock(&x86_cpu_microcode_mutex);
517 EXPORT_SYMBOL_GPL(save_mc_for_early);
520 static bool __init load_builtin_intel_microcode(struct cpio_data *cp)
523 unsigned int eax = 0x00000001, ebx, ecx = 0, edx;
526 native_cpuid(&eax, &ebx, &ecx, &edx);
528 sprintf(name, "intel-ucode/%02x-%02x-%02x",
529 x86_family(eax), x86_model(eax), x86_stepping(eax));
531 return get_builtin_firmware(cp, name);
537 static __initdata char ucode_name[] = "kernel/x86/microcode/GenuineIntel.bin";
538 static __init enum ucode_state
539 scan_microcode(struct mc_saved_data *mcs, unsigned long *mc_ptrs,
540 unsigned long start, unsigned long size,
541 struct ucode_cpu_info *uci)
546 char *p = (char *)__pa_nodebug(ucode_name);
548 char *p = ucode_name;
554 /* try built-in microcode if no initrd */
556 if (!load_builtin_intel_microcode(&cd))
559 cd = find_cpio_data(p, (void *)start, size, &offset);
564 return get_matching_model_microcode(start, cd.data, cd.size,
569 * Print ucode update info.
572 print_ucode_info(struct ucode_cpu_info *uci, unsigned int date)
574 pr_info_once("microcode updated early to revision 0x%x, date = %04x-%02x-%02x\n",
578 (date >> 16) & 0xff);
583 static int delay_ucode_info;
584 static int current_mc_date;
587 * Print early updated ucode info after printk works. This is delayed info dump.
589 void show_ucode_info_early(void)
591 struct ucode_cpu_info uci;
593 if (delay_ucode_info) {
594 collect_cpu_info_early(&uci);
595 print_ucode_info(&uci, current_mc_date);
596 delay_ucode_info = 0;
601 * At this point, we can not call printk() yet. Keep microcode patch number in
602 * mc_saved_data.mc_saved and delay printing microcode info in
603 * show_ucode_info_early() until printk() works.
605 static void print_ucode(struct ucode_cpu_info *uci)
607 struct microcode_intel *mc;
608 int *delay_ucode_info_p;
609 int *current_mc_date_p;
615 delay_ucode_info_p = (int *)__pa_nodebug(&delay_ucode_info);
616 current_mc_date_p = (int *)__pa_nodebug(¤t_mc_date);
618 *delay_ucode_info_p = 1;
619 *current_mc_date_p = mc->hdr.date;
624 * Flush global tlb. We only do this in x86_64 where paging has been enabled
625 * already and PGE should be enabled as well.
627 static inline void flush_tlb_early(void)
629 __native_flush_tlb_global_irq_disabled();
632 static inline void print_ucode(struct ucode_cpu_info *uci)
634 struct microcode_intel *mc;
640 print_ucode_info(uci, mc->hdr.date);
644 static int apply_microcode_early(struct ucode_cpu_info *uci, bool early)
646 struct microcode_intel *mc;
653 /* write microcode via MSR 0x79 */
654 native_wrmsrl(MSR_IA32_UCODE_WRITE, (unsigned long)mc->bits);
655 native_wrmsrl(MSR_IA32_UCODE_REV, 0);
657 /* As documented in the SDM: Do a CPUID 1 here */
660 /* get the current revision from MSR 0x8B */
661 native_rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
662 if (val[1] != mc->hdr.rev)
666 /* Flush global tlb. This is precaution. */
669 uci->cpu_sig.rev = val[1];
674 print_ucode_info(uci, mc->hdr.date);
680 * This function converts microcode patch offsets previously stored in
681 * mc_tmp_ptrs to pointers and stores the pointers in mc_saved_data.
683 int __init save_microcode_in_initrd_intel(void)
685 unsigned int count = mc_saved_data.num_saved;
686 struct microcode_intel *mc_saved[MAX_UCODE_COUNT];
692 copy_ptrs(mc_saved, mc_tmp_ptrs, get_initrd_start(), count);
694 ret = save_microcode(&mc_saved_data, mc_saved, count);
696 pr_err("Cannot save microcode patches from initrd.\n");
704 _load_ucode_intel_bsp(struct mc_saved_data *mcs, unsigned long *mc_ptrs,
705 unsigned long start, unsigned long size)
707 struct ucode_cpu_info uci;
708 enum ucode_state ret;
710 collect_cpu_info_early(&uci);
712 ret = scan_microcode(mcs, mc_ptrs, start, size, &uci);
716 ret = load_microcode(mcs, mc_ptrs, start, &uci);
720 apply_microcode_early(&uci, true);
723 void __init load_ucode_intel_bsp(void)
727 struct boot_params *p;
729 p = (struct boot_params *)__pa_nodebug(&boot_params);
730 size = p->hdr.ramdisk_size;
733 * Set start only if we have an initrd image. We cannot use initrd_start
734 * because it is not set that early yet.
736 start = (size ? p->hdr.ramdisk_image : 0);
738 _load_ucode_intel_bsp((struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
739 (unsigned long *)__pa_nodebug(&mc_tmp_ptrs),
742 size = boot_params.hdr.ramdisk_size;
743 start = (size ? boot_params.hdr.ramdisk_image + PAGE_OFFSET : 0);
745 _load_ucode_intel_bsp(&mc_saved_data, mc_tmp_ptrs, start, size);
749 void load_ucode_intel_ap(void)
751 unsigned long *mcs_tmp_p;
752 struct mc_saved_data *mcs_p;
753 struct ucode_cpu_info uci;
754 enum ucode_state ret;
757 mcs_tmp_p = (unsigned long *)__pa_nodebug(mc_tmp_ptrs);
758 mcs_p = (struct mc_saved_data *)__pa_nodebug(&mc_saved_data);
760 mcs_tmp_p = mc_tmp_ptrs;
761 mcs_p = &mc_saved_data;
765 * If there is no valid ucode previously saved in memory, no need to
766 * update ucode on this AP.
768 if (!mcs_p->num_saved)
771 collect_cpu_info_early(&uci);
772 ret = load_microcode(mcs_p, mcs_tmp_p, get_initrd_start_addr(), &uci);
776 apply_microcode_early(&uci, true);
779 void reload_ucode_intel(void)
781 struct ucode_cpu_info uci;
782 enum ucode_state ret;
784 if (!mc_saved_data.num_saved)
787 collect_cpu_info_early(&uci);
789 ret = load_microcode_early(mc_saved_data.mc_saved,
790 mc_saved_data.num_saved, &uci);
794 apply_microcode_early(&uci, false);
797 static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
799 struct cpuinfo_x86 *c = &cpu_data(cpu_num);
802 memset(csig, 0, sizeof(*csig));
804 csig->sig = cpuid_eax(0x00000001);
806 if ((c->x86_model >= 5) || (c->x86 > 6)) {
807 /* get processor flags from MSR 0x17 */
808 rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
809 csig->pf = 1 << ((val[1] >> 18) & 7);
812 csig->rev = c->microcode;
813 pr_info("CPU%d sig=0x%x, pf=0x%x, revision=0x%x\n",
814 cpu_num, csig->sig, csig->pf, csig->rev);
820 * return 0 - no update found
821 * return 1 - found update
823 static int get_matching_mc(struct microcode_intel *mc, int cpu)
825 struct cpu_signature cpu_sig;
826 unsigned int csig, cpf, crev;
828 collect_cpu_info(cpu, &cpu_sig);
834 return has_newer_microcode(mc, csig, cpf, crev);
837 static int apply_microcode_intel(int cpu)
839 struct microcode_intel *mc;
840 struct ucode_cpu_info *uci;
841 struct cpuinfo_x86 *c;
844 /* We should bind the task to the CPU */
845 if (WARN_ON(raw_smp_processor_id() != cpu))
848 uci = ucode_cpu_info + cpu;
854 * Microcode on this CPU could be updated earlier. Only apply the
855 * microcode patch in mc when it is newer than the one on this
858 if (!get_matching_mc(mc, cpu))
861 /* write microcode via MSR 0x79 */
862 wrmsrl(MSR_IA32_UCODE_WRITE, (unsigned long)mc->bits);
863 wrmsrl(MSR_IA32_UCODE_REV, 0);
865 /* As documented in the SDM: Do a CPUID 1 here */
868 /* get the current revision from MSR 0x8B */
869 rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
871 if (val[1] != mc->hdr.rev) {
872 pr_err("CPU%d update to revision 0x%x failed\n",
877 pr_info("CPU%d updated to revision 0x%x, date = %04x-%02x-%02x\n",
879 mc->hdr.date & 0xffff,
881 (mc->hdr.date >> 16) & 0xff);
885 uci->cpu_sig.rev = val[1];
886 c->microcode = val[1];
891 static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
892 int (*get_ucode_data)(void *, const void *, size_t))
894 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
895 u8 *ucode_ptr = data, *new_mc = NULL, *mc = NULL;
896 int new_rev = uci->cpu_sig.rev;
897 unsigned int leftover = size;
898 enum ucode_state state = UCODE_OK;
899 unsigned int curr_mc_size = 0;
900 unsigned int csig, cpf;
903 struct microcode_header_intel mc_header;
904 unsigned int mc_size;
906 if (leftover < sizeof(mc_header)) {
907 pr_err("error! Truncated header in microcode data file\n");
911 if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header)))
914 mc_size = get_totalsize(&mc_header);
915 if (!mc_size || mc_size > leftover) {
916 pr_err("error! Bad data in microcode data file\n");
920 /* For performance reasons, reuse mc area when possible */
921 if (!mc || mc_size > curr_mc_size) {
923 mc = vmalloc(mc_size);
926 curr_mc_size = mc_size;
929 if (get_ucode_data(mc, ucode_ptr, mc_size) ||
930 microcode_sanity_check(mc, 1) < 0) {
934 csig = uci->cpu_sig.sig;
935 cpf = uci->cpu_sig.pf;
936 if (has_newer_microcode(mc, csig, cpf, new_rev)) {
938 new_rev = mc_header.rev;
940 mc = NULL; /* trigger new vmalloc */
943 ucode_ptr += mc_size;
956 state = UCODE_NFOUND;
961 uci->mc = (struct microcode_intel *)new_mc;
964 * If early loading microcode is supported, save this mc into
965 * permanent memory. So it will be loaded early when a CPU is hot added
968 save_mc_for_early(new_mc);
970 pr_debug("CPU%d found a matching microcode update with version 0x%x (current=0x%x)\n",
971 cpu, new_rev, uci->cpu_sig.rev);
976 static int get_ucode_fw(void *to, const void *from, size_t n)
982 static enum ucode_state request_microcode_fw(int cpu, struct device *device,
986 struct cpuinfo_x86 *c = &cpu_data(cpu);
987 const struct firmware *firmware;
988 enum ucode_state ret;
990 sprintf(name, "intel-ucode/%02x-%02x-%02x",
991 c->x86, c->x86_model, c->x86_mask);
993 if (request_firmware_direct(&firmware, name, device)) {
994 pr_debug("data file %s load failed\n", name);
998 ret = generic_load_microcode(cpu, (void *)firmware->data,
999 firmware->size, &get_ucode_fw);
1001 release_firmware(firmware);
1006 static int get_ucode_user(void *to, const void *from, size_t n)
1008 return copy_from_user(to, from, n);
1011 static enum ucode_state
1012 request_microcode_user(int cpu, const void __user *buf, size_t size)
1014 return generic_load_microcode(cpu, (void *)buf, size, &get_ucode_user);
1017 static void microcode_fini_cpu(int cpu)
1019 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
1025 static struct microcode_ops microcode_intel_ops = {
1026 .request_microcode_user = request_microcode_user,
1027 .request_microcode_fw = request_microcode_fw,
1028 .collect_cpu_info = collect_cpu_info,
1029 .apply_microcode = apply_microcode_intel,
1030 .microcode_fini_cpu = microcode_fini_cpu,
1033 struct microcode_ops * __init init_intel_microcode(void)
1035 struct cpuinfo_x86 *c = &boot_cpu_data;
1037 if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
1038 cpu_has(c, X86_FEATURE_IA64)) {
1039 pr_err("Intel CPU family 0x%x not supported\n", c->x86);
1043 return µcode_intel_ops;