From: Fenghua Yu <***@intel.com>
Implementation of early update ucode on Intel's CPU.
load_ucode_intel_bsp() scans ucode in initrd image file which is a cpio format
ucode followed by ordinary initrd image file. The binary ucode file is stored
in kernel/x86/microcode/GenuineIntel.bin in the cpio data. All ucode
patches with the same model as BSP are saved in memory. A matching ucode patch
is updated on BSP.
load_ucode_intel_ap() reads saved ucoded patches and updates ucode on AP.
Signed-off-by: Fenghua Yu <***@intel.com>
---
arch/x86/kernel/microcode_intel_early.c | 792 ++++++++++++++++++++++++++++++++
1 file changed, 792 insertions(+)
create mode 100644 arch/x86/kernel/microcode_intel_early.c
diff --git a/arch/x86/kernel/microcode_intel_early.c b/arch/x86/kernel/microcode_intel_early.c
new file mode 100644
index 0000000..202b103
--- /dev/null
+++ b/arch/x86/kernel/microcode_intel_early.c
@@ -0,0 +1,792 @@
+/*
+ * Intel CPU microcode early update for Linux
+ *
+ * Copyright (C) 2012 Fenghua Yu <***@intel.com>
+ * H Peter Anvin" <***@zytor.com>
+ *
+ * This allows to early upgrade microcode on Intel processors
+ * belonging to IA-32 family - PentiumPro, Pentium II,
+ * Pentium III, Xeon, Pentium 4, etc.
+ *
+ * Reference: Section 9.11 of Volume 3, IA-32 Intel Architecture
+ * Software Developer's Manual.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/earlycpio.h>
+#include <linux/initrd.h>
+#include <linux/cpu.h>
+#include <asm/msr.h>
+#include <asm/microcode_intel.h>
+#include <asm/processor.h>
+#include <asm/tlbflush.h>
+
+unsigned long mc_saved_in_initrd[MAX_UCODE_COUNT];
+struct mc_saved_data {
+ unsigned int mc_saved_count;
+ struct microcode_intel **mc_saved;
+} mc_saved_data;
+
+static enum ucode_state __cpuinit
+generic_load_microcode_early(struct microcode_intel **mc_saved_p,
+ unsigned int mc_saved_count,
+ struct ucode_cpu_info *uci)
+{
+ struct microcode_intel *ucode_ptr, *new_mc = NULL;
+ int new_rev = uci->cpu_sig.rev;
+ enum ucode_state state = UCODE_OK;
+ unsigned int mc_size;
+ struct microcode_header_intel *mc_header;
+ unsigned int csig = uci->cpu_sig.sig;
+ unsigned int cpf = uci->cpu_sig.pf;
+ int i;
+
+ for (i = 0; i < mc_saved_count; i++) {
+ ucode_ptr = mc_saved_p[i];
+
+ mc_header = (struct microcode_header_intel *)ucode_ptr;
+ mc_size = get_totalsize(mc_header);
+ if (get_matching_microcode(csig, cpf, ucode_ptr, new_rev)) {
+ new_rev = mc_header->rev;
+ new_mc = ucode_ptr;
+ }
+ }
+
+ if (!new_mc) {
+ state = UCODE_NFOUND;
+ goto out;
+ }
+
+ uci->mc = (struct microcode_intel *)new_mc;
+out:
+ return state;
+}
+
+static void __cpuinit
+microcode_pointer(struct microcode_intel **mc_saved,
+ unsigned long *mc_saved_in_initrd,
+ unsigned long initrd_start, int mc_saved_count)
+{
+ int i;
+
+ for (i = 0; i < mc_saved_count; i++)
+ mc_saved[i] = (struct microcode_intel *)
+ (mc_saved_in_initrd[i] + initrd_start);
+}
+
+#ifdef CONFIG_X86_32
+static void __cpuinit
+microcode_phys(struct microcode_intel **mc_saved_tmp,
+ struct mc_saved_data *mc_saved_data)
+{
+ int i;
+ struct microcode_intel ***mc_saved;
+
+ mc_saved = (struct microcode_intel ***)
+ __pa_symbol(&mc_saved_data->mc_saved);
+ for (i = 0; i < mc_saved_data->mc_saved_count; i++) {
+ struct microcode_intel *p;
+
+ p = *(struct microcode_intel **)
+ __pa(mc_saved_data->mc_saved + i);
+ mc_saved_tmp[i] = (struct microcode_intel *)__pa(p);
+ }
+}
+#endif
+
+static enum ucode_state __cpuinit
+load_microcode(struct mc_saved_data *mc_saved_data,
+ unsigned long *mc_saved_in_initrd,
+ unsigned long initrd_start,
+ struct ucode_cpu_info *uci)
+{
+ struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
+ unsigned int count = mc_saved_data->mc_saved_count;
+
+ if (!mc_saved_data->mc_saved) {
+ microcode_pointer(mc_saved_tmp, mc_saved_in_initrd,
+ initrd_start, count);
+
+ return generic_load_microcode_early(mc_saved_tmp, count, uci);
+ } else {
+#ifdef CONFIG_X86_32
+ microcode_phys(mc_saved_tmp, mc_saved_data);
+ return generic_load_microcode_early(mc_saved_tmp, count, uci);
+#else
+ return generic_load_microcode_early(mc_saved_data->mc_saved,
+ count, uci);
+#endif
+ }
+}
+
+static u8 get_x86_family(unsigned long sig)
+{
+ u8 x86;
+
+ x86 = (sig >> 8) & 0xf;
+
+ if (x86 == 0xf)
+ x86 += (sig >> 20) & 0xff;
+
+ return x86;
+}
+
+static u8 get_x86_model(unsigned long sig)
+{
+ u8 x86, x86_model;
+
+ x86 = get_x86_family(sig);
+ x86_model = (sig >> 4) & 0xf;
+
+ if (x86 == 0x6 || x86 == 0xf)
+ x86_model += ((sig >> 16) & 0xf) << 4;
+
+ return x86_model;
+}
+
+/*
+ * Given CPU signature and a microcode patch, this function finds if the
+ * microcode patch has matching family and model with the CPU.
+ */
+static enum ucode_state
+matching_model_microcode(struct microcode_header_intel *mc_header,
+ unsigned long sig)
+{
+ u8 x86, x86_model;
+ u8 x86_ucode, x86_model_ucode;
+ struct extended_sigtable *ext_header;
+ unsigned long total_size = get_totalsize(mc_header);
+ unsigned long data_size = get_datasize(mc_header);
+ int ext_sigcount, i;
+ struct extended_signature *ext_sig;
+
+ x86 = get_x86_family(sig);
+ x86_model = get_x86_model(sig);
+
+ x86_ucode = get_x86_family(mc_header->sig);
+ x86_model_ucode = get_x86_model(mc_header->sig);
+
+ if (x86 == x86_ucode && x86_model == x86_model_ucode)
+ return UCODE_OK;
+
+ /* Look for ext. headers: */
+ if (total_size <= data_size + MC_HEADER_SIZE)
+ return UCODE_NFOUND;
+
+ ext_header = (struct extended_sigtable *)
+ mc_header + data_size + MC_HEADER_SIZE;
+ ext_sigcount = ext_header->count;
+ ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
+
+ for (i = 0; i < ext_sigcount; i++) {
+ x86_ucode = get_x86_family(ext_sig->sig);
+ x86_model_ucode = get_x86_model(ext_sig->sig);
+
+ if (x86 == x86_ucode && x86_model == x86_model_ucode)
+ return UCODE_OK;
+
+ ext_sig++;
+ }
+
+ return UCODE_NFOUND;
+}
+
+static int
+save_microcode(struct mc_saved_data *mc_saved_data,
+ struct microcode_intel **mc_saved_src,
+ unsigned int mc_saved_count)
+{
+ int i, j;
+ struct microcode_intel **mc_saved_p;
+ int ret;
+
+ if (!mc_saved_count)
+ return -EINVAL;
+
+ /*
+ * Copy new microcode data.
+ */
+ mc_saved_p = kmalloc(mc_saved_count*sizeof(struct microcode_intel *),
+ GFP_KERNEL);
+ if (!mc_saved_p)
+ return -ENOMEM;
+
+ for (i = 0; i < mc_saved_count; i++) {
+ struct microcode_intel *mc = mc_saved_src[i];
+ struct microcode_header_intel *mc_header = &mc->hdr;
+ unsigned long mc_size = get_totalsize(mc_header);
+ mc_saved_p[i] = kmalloc(mc_size, GFP_KERNEL);
+ if (!mc_saved_p[i]) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ if (!mc_saved_src[i]) {
+ ret = -EINVAL;
+ goto err;
+ }
+ memcpy(mc_saved_p[i], mc, mc_size);
+ }
+
+ /*
+ * Point to newly saved microcode.
+ */
+ mc_saved_data->mc_saved = mc_saved_p;
+ mc_saved_data->mc_saved_count = mc_saved_count;
+
+ return 0;
+
+err:
+ for (j = 0; j <= i; j++)
+ kfree(mc_saved_p[j]);
+ kfree(mc_saved_p);
+
+ return ret;
+}
+
+/*
+ * A microcode patch in ucode_ptr is saved into mc_saved
+ * - if it has matching signature and newer revision compared to an existing
+ * patch mc_saved.
+ * - or if it is a newly discovered microcode patch.
+ *
+ * The microcode patch should have matching model with CPU.
+ */
+static void _save_mc(struct microcode_intel **mc_saved, u8 *ucode_ptr,
+ unsigned int *mc_saved_count_p)
+{
+ int i;
+ int found = 0;
+ unsigned int mc_saved_count = *mc_saved_count_p;
+ struct microcode_header_intel *mc_header;
+
+ mc_header = (struct microcode_header_intel *)ucode_ptr;
+ for (i = 0; i < mc_saved_count; i++) {
+ unsigned int sig, pf;
+ unsigned int new_rev;
+ struct microcode_header_intel *mc_saved_header =
+ (struct microcode_header_intel *)mc_saved[i];
+ sig = mc_saved_header->sig;
+ pf = mc_saved_header->pf;
+ new_rev = mc_header->rev;
+
+ if (get_matching_sig(sig, pf, ucode_ptr, new_rev)) {
+ found = 1;
+ if (update_match_revision(mc_header, new_rev)) {
+ /*
+ * Found an older ucode saved before.
+ * Replace the older one with this newer
+ * one.
+ */
+ mc_saved[i] =
+ (struct microcode_intel *)ucode_ptr;
+ break;
+ }
+ }
+ }
+ if (i >= mc_saved_count && !found)
+ /*
+ * This ucode is first time discovered in ucode file.
+ * Save it to memory.
+ */
+ mc_saved[mc_saved_count++] =
+ (struct microcode_intel *)ucode_ptr;
+
+ *mc_saved_count_p = mc_saved_count;
+}
+
+/*
+ * Get microcode matching with BSP's model. Only CPUs with the same model as
+ * BSP can stay in the platform.
+ */
+static enum ucode_state __init
+get_matching_model_microcode(int cpu, unsigned long start,
+ void *data, size_t size,
+ struct mc_saved_data *mc_saved_data,
+ unsigned long *mc_saved_in_initrd,
+ struct ucode_cpu_info *uci)
+{
+ u8 *ucode_ptr = data;
+ unsigned int leftover = size;
+ enum ucode_state state = UCODE_OK;
+ unsigned int mc_size;
+ struct microcode_header_intel *mc_header;
+ struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
+ unsigned int mc_saved_count = mc_saved_data->mc_saved_count;
+ int i;
+
+ while (leftover) {
+ mc_header = (struct microcode_header_intel *)ucode_ptr;
+
+ mc_size = get_totalsize(mc_header);
+ if (!mc_size || mc_size > leftover ||
+ microcode_sanity_check(ucode_ptr, 0) < 0)
+ break;
+
+ leftover -= mc_size;
+
+ /*
+ * Since APs with same family and model as the BSP may boot in
+ * the platform, we need to find and save microcode patches
+ * with the same family and model as the BSP.
+ */
+ if (matching_model_microcode(mc_header, uci->cpu_sig.sig) !=
+ UCODE_OK) {
+ ucode_ptr += mc_size;
+ continue;
+ }
+
+ _save_mc(mc_saved_tmp, ucode_ptr, &mc_saved_count);
+
+ ucode_ptr += mc_size;
+ }
+
+ if (leftover) {
+ state = UCODE_ERROR;
+ goto out;
+ }
+
+ if (mc_saved_count == 0) {
+ state = UCODE_NFOUND;
+ goto out;
+ }
+
+ for (i = 0; i < mc_saved_count; i++)
+ mc_saved_in_initrd[i] = (unsigned long)mc_saved_tmp[i] - start;
+
+ mc_saved_data->mc_saved_count = mc_saved_count;
+out:
+ return state;
+}
+
+#define native_rdmsr(msr, val1, val2) \
+do { \
+ u64 __val = native_read_msr((msr)); \
+ (void)((val1) = (u32)__val); \
+ (void)((val2) = (u32)(__val >> 32)); \
+} while (0)
+
+#define native_wrmsr(msr, low, high) \
+ native_write_msr(msr, low, high);
+
+static int __cpuinit collect_cpu_info_early(struct ucode_cpu_info *uci)
+{
+ unsigned int val[2];
+ u8 x86, x86_model;
+ struct cpu_signature csig;
+ unsigned int eax, ebx, ecx, edx;
+
+ csig.sig = 0;
+ csig.pf = 0;
+ csig.rev = 0;
+
+ memset(uci, 0, sizeof(*uci));
+
+ eax = 0x00000001;
+ ecx = 0;
+ native_cpuid(&eax, &ebx, &ecx, &edx);
+ csig.sig = eax;
+
+ x86 = get_x86_family(csig.sig);
+ x86_model = get_x86_model(csig.sig);
+
+ if ((x86_model >= 5) || (x86 > 6)) {
+ /* get processor flags from MSR 0x17 */
+ native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
+ csig.pf = 1 << ((val[1] >> 18) & 7);
+ }
+ native_wrmsr(MSR_IA32_UCODE_REV, 0, 0);
+
+ /* As documented in the SDM: Do a CPUID 1 here */
+ sync_core();
+
+ /* get the current revision from MSR 0x8B */
+ native_rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
+
+ csig.rev = val[1];
+
+ uci->cpu_sig = csig;
+ uci->valid = 1;
+
+ return 0;
+}
+
+#ifdef DEBUG
+static void __ref show_saved_mc(void)
+{
+ int i, j;
+ unsigned int sig, pf, rev, total_size, data_size, date;
+ struct ucode_cpu_info uci;
+
+ if (mc_saved_data.mc_saved_count == 0) {
+ pr_debug("no micorcode data saved.\n");
+ return;
+ }
+ pr_debug("Total microcode saved: %d\n", mc_saved_data.mc_saved_count);
+
+ collect_cpu_info_early(&uci);
+
+ sig = uci.cpu_sig.sig;
+ pf = uci.cpu_sig.pf;
+ rev = uci.cpu_sig.rev;
+ pr_debug("CPU%d: sig=0x%x, pf=0x%x, rev=0x%x\n",
+ smp_processor_id(), sig, pf, rev);
+
+ for (i = 0; i < mc_saved_data.mc_saved_count; i++) {
+ struct microcode_header_intel *mc_saved_header;
+ struct extended_sigtable *ext_header;
+ int ext_sigcount;
+ struct extended_signature *ext_sig;
+
+ mc_saved_header = (struct microcode_header_intel *)
+ mc_saved_data.mc_saved[i];
+ sig = mc_saved_header->sig;
+ pf = mc_saved_header->pf;
+ rev = mc_saved_header->rev;
+ total_size = get_totalsize(mc_saved_header);
+ data_size = get_datasize(mc_saved_header);
+ date = mc_saved_header->date;
+
+ pr_debug("mc_saved[%d]: sig=0x%x, pf=0x%x, rev=0x%x, toal size=0x%x, date = %04x-%02x-%02x\n",
+ i, sig, pf, rev, total_size,
+ date & 0xffff,
+ date >> 24,
+ (date >> 16) & 0xff);
+
+ /* Look for ext. headers: */
+ if (total_size <= data_size + MC_HEADER_SIZE)
+ continue;
+
+ ext_header = (struct extended_sigtable *)
+ mc_saved_header + data_size + MC_HEADER_SIZE;
+ ext_sigcount = ext_header->count;
+ ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
+
+ for (j = 0; j < ext_sigcount; j++) {
+ sig = ext_sig->sig;
+ pf = ext_sig->pf;
+
+ pr_debug("\tExtended[%d]: sig=0x%x, pf=0x%x\n",
+ j, sig, pf);
+
+ ext_sig++;
+ }
+
+ }
+}
+#else
+static inline void show_saved_mc(void)
+{
+}
+#endif
+
+#if defined(CONFIG_MICROCODE_INTEL_EARLY) && defined(CONFIG_HOTPLUG_CPU)
+/*
+ * Save this mc into mc_saved_data. So it will be loaded early when a CPU is
+ * hot added or resumes.
+ *
+ * Please make sure this mc should be a valid microcode patch before calling
+ * this function.
+ */
+int save_mc_for_early(u8 *mc)
+{
+ struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
+ unsigned int mc_saved_count_init;
+ unsigned int mc_saved_count;
+ struct microcode_intel **mc_saved;
+ int ret = 0;
+ int i;
+
+ /*
+ * Hold hotplug lock so mc_saved_data is not accessed by a CPU in
+ * hotplug.
+ */
+ cpu_hotplug_driver_lock();
+
+ mc_saved_count_init = mc_saved_data.mc_saved_count;
+ mc_saved_count = mc_saved_data.mc_saved_count;
+ mc_saved = mc_saved_data.mc_saved;
+
+ if (mc_saved && mc_saved_count)
+ memcpy(mc_saved_tmp, mc_saved,
+ mc_saved_count * sizeof(struct mirocode_intel *));
+ /*
+ * Save the microcode patch mc in mc_save_tmp structure if it's a newer
+ * version.
+ */
+
+ _save_mc(mc_saved_tmp, mc, &mc_saved_count);
+
+ /*
+ * Save the mc_save_tmp in global mc_saved_data.
+ */
+ ret = save_microcode(&mc_saved_data, mc_saved_tmp, mc_saved_count);
+ if (ret) {
+ pr_err("Can not save microcode patch.\n");
+ goto out;
+ }
+
+ show_saved_mc();
+
+ /*
+ * Free old saved microcod data.
+ */
+ if (mc_saved) {
+ for (i = 0; i < mc_saved_count_init; i++)
+ kfree(mc_saved[i]);
+ kfree(mc_saved);
+ }
+
+out:
+ cpu_hotplug_driver_unlock();
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(save_mc_for_early);
+#endif
+
+static __initdata char ucode_name[] = "kernel/x86/microcode/GenuineIntel.bin";
+static __init enum ucode_state
+scan_microcode(unsigned long start, unsigned long end,
+ struct mc_saved_data *mc_saved_data,
+ unsigned long *mc_saved_in_initrd,
+ struct ucode_cpu_info *uci)
+{
+ unsigned int size = end - start + 1;
+ struct cpio_data cd;
+ long offset = 0;
+#ifdef CONFIG_X86_32
+ char *p = (char *)__pa_symbol(ucode_name);
+#else
+ char *p = ucode_name;
+#endif
+
+ cd.data = NULL;
+ cd.size = 0;
+
+ cd = find_cpio_data(p, (void *)start, size, &offset);
+ if (!cd.data)
+ return UCODE_ERROR;
+
+
+ return get_matching_model_microcode(0, start, cd.data, cd.size,
+ mc_saved_data, mc_saved_in_initrd,
+ uci);
+}
+
+/*
+ * Print ucode update info.
+ */
+static void __cpuinit
+print_ucode_info(struct ucode_cpu_info *uci, unsigned int date)
+{
+ int cpu = smp_processor_id();
+
+ pr_info("CPU%d microcode updated early to revision 0x%x, date = %04x-%02x-%02x\n",
+ cpu,
+ uci->cpu_sig.rev,
+ date & 0xffff,
+ date >> 24,
+ (date >> 16) & 0xff);
+}
+
+#ifdef CONFIG_X86_32
+
+static int delay_ucode_info;
+static int current_mc_date;
+
+/*
+ * Print early updated ucode info after printk works. This is delayed info dump.
+ */
+void __cpuinit show_ucode_info_early(void)
+{
+ struct ucode_cpu_info uci;
+
+ if (delay_ucode_info) {
+ collect_cpu_info_early(&uci);
+ print_ucode_info(&uci, current_mc_date);
+ delay_ucode_info = 0;
+ }
+}
+
+/*
+ * At this point, we can not call printk() yet. Keep microcode patch number in
+ * mc_saved_data.mc_saved and delay printing microcode info in
+ * show_ucode_info_early() until printk() works.
+ */
+static void __cpuinit print_ucode(struct ucode_cpu_info *uci)
+{
+ struct microcode_intel *mc_intel;
+ int *delay_ucode_info_p;
+ int *current_mc_date_p;
+
+ mc_intel = uci->mc;
+ if (mc_intel == NULL)
+ return;
+
+ delay_ucode_info_p = (int *)__pa_symbol(&delay_ucode_info);
+ current_mc_date_p = (int *)__pa_symbol(¤t_mc_date);
+
+ *delay_ucode_info_p = 1;
+ *current_mc_date_p = mc_intel->hdr.date;
+}
+#else
+
+/*
+ * Flush global tlb. We only do this in x86_64 where paging has been enabled
+ * already and PGE should be enabled as well.
+ */
+static inline void __cpuinit flush_tlb_early(void)
+{
+ __native_flush_tlb_global_irq_disabled();
+}
+
+static inline void __cpuinit print_ucode(struct ucode_cpu_info *uci)
+{
+ struct microcode_intel *mc_intel;
+
+ mc_intel = uci->mc;
+ if (mc_intel == NULL)
+ return;
+
+ print_ucode_info(uci, mc_intel->hdr.date);
+}
+#endif
+
+static int apply_microcode_early(struct mc_saved_data *mc_saved_data,
+ struct ucode_cpu_info *uci)
+{
+ struct microcode_intel *mc_intel;
+ unsigned int val[2];
+
+ mc_intel = uci->mc;
+ if (mc_intel == NULL)
+ return 0;
+
+ /* write microcode via MSR 0x79 */
+ native_wrmsr(MSR_IA32_UCODE_WRITE,
+ (unsigned long) mc_intel->bits,
+ (unsigned long) mc_intel->bits >> 16 >> 16);
+ native_wrmsr(MSR_IA32_UCODE_REV, 0, 0);
+
+ /* As documented in the SDM: Do a CPUID 1 here */
+ sync_core();
+
+ /* get the current revision from MSR 0x8B */
+ native_rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
+ if (val[1] != mc_intel->hdr.rev)
+ return -1;
+
+#ifdef CONFIG_X86_64
+ /* Flush global tlb. This is precaution. */
+ flush_tlb_early();
+#endif
+ uci->cpu_sig.rev = val[1];
+
+ print_ucode(uci);
+
+ return 0;
+}
+
+/*
+ * This function converts microcode patch offsets previously stored in
+ * mc_saved_in_initrd to pointers and stores the pointers in mc_saved_data.
+ */
+int __init save_microcode_in_initrd(void)
+{
+ unsigned int count = mc_saved_data.mc_saved_count;
+ struct microcode_intel *mc_saved[MAX_UCODE_COUNT];
+ int ret = 0;
+
+ if (count == 0)
+ return ret;
+
+ microcode_pointer(mc_saved, mc_saved_in_initrd, initrd_start, count);
+ ret = save_microcode(&mc_saved_data, mc_saved, count);
+ if (ret)
+ pr_err("Can not save microcod patches from initrd");
+
+ show_saved_mc();
+
+ return ret;
+}
+
+static void __init
+_load_ucode_intel_bsp(struct mc_saved_data *mc_saved_data,
+ unsigned long *mc_saved_in_initrd,
+ unsigned long initrd_start_early,
+ unsigned long initrd_end_early,
+ struct ucode_cpu_info *uci)
+{
+ collect_cpu_info_early(uci);
+ scan_microcode(initrd_start_early, initrd_end_early, mc_saved_data,
+ mc_saved_in_initrd, uci);
+ load_microcode(mc_saved_data, mc_saved_in_initrd,
+ initrd_start_early, uci);
+ apply_microcode_early(mc_saved_data, uci);
+}
+
+void __init
+load_ucode_intel_bsp(char *real_mode_data)
+{
+ u64 ramdisk_image, ramdisk_size;
+ unsigned long initrd_start_early, initrd_end_early;
+ struct boot_params *boot_params;
+ struct ucode_cpu_info uci;
+
+ boot_params = (struct boot_params *)real_mode_data;
+ ramdisk_image = boot_params->hdr.ramdisk_image;
+ ramdisk_size = boot_params->hdr.ramdisk_size;
+
+#ifdef CONFIG_X86_64
+ initrd_start_early = ramdisk_image + PAGE_OFFSET;
+ initrd_end_early = initrd_start_early + ramdisk_size;
+ _load_ucode_intel_bsp(&mc_saved_data, mc_saved_in_initrd,
+ initrd_start_early, initrd_end_early, &uci);
+#else
+ initrd_start_early = ramdisk_image;
+ initrd_end_early = initrd_start_early + ramdisk_size;
+ _load_ucode_intel_bsp(
+ (struct mc_saved_data *)__pa_symbol(&mc_saved_data),
+ (unsigned long *)__pa_symbol(&mc_saved_in_initrd),
+ initrd_start_early, initrd_end_early, &uci);
+#endif
+}
+
+void __cpuinit load_ucode_intel_ap(void)
+{
+ struct mc_saved_data *mc_saved_data_p;
+ struct ucode_cpu_info uci;
+ unsigned long *mc_saved_in_initrd_p;
+ unsigned long initrd_start_addr;
+
+#ifdef CONFIG_X86_64
+ mc_saved_data_p = &mc_saved_data;
+ mc_saved_in_initrd_p = mc_saved_in_initrd;
+ initrd_start_addr = initrd_start;
+#else
+ unsigned long *initrd_start_p;
+
+ mc_saved_in_initrd_p =
+ (unsigned long *)__pa_symbol(mc_saved_in_initrd);
+ mc_saved_data_p = (struct mc_saved_data *)__pa_symbol(&mc_saved_data);
+ initrd_start_p = (unsigned long *)__pa_symbol(&initrd_start);
+ initrd_start_addr = (unsigned long)__pa_symbol(*initrd_start_p);
+#endif
+ /*
+ * If there is no valid ucode previously saved in memory, no need to
+ * update ucode on this AP.
+ */
+ if (mc_saved_data_p->mc_saved_count == 0)
+ return;
+
+ collect_cpu_info_early(&uci);
+ load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
+ initrd_start_addr, &uci);
+ apply_microcode_early(mc_saved_data_p, &uci);
+}
--
1.8.0.1