L: iommu@lists.linux-foundation.org
S: Supported
+AMD MICROCODE UPDATE SUPPORT
+P: Peter Oruba
+M: peter.oruba@amd.com
+S: Supported
+
AMS (Apple Motion Sensor) DRIVER
P: Stelian Pop
M: stelian@popies.net
Say N otherwise.
config MICROCODE
- tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
+ tristate "/dev/cpu/microcode - microcode support"
select FW_LOADER
---help---
If you say Y here, you will be able to update the microcode on
- Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
- Pentium III, Pentium 4, Xeon etc. You will obviously need the
- actual microcode binary data itself which is not shipped with the
- Linux kernel.
+ certain Intel and AMD processors. The Intel support is for the
+ IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
+ Pentium 4, Xeon etc. The AMD support is for family 0x10 and
+ 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
+ You will obviously need the actual microcode binary data itself
+ which is not shipped with the Linux kernel.
- For latest news and information on obtaining all the required
- ingredients for this driver, check:
- <http://www.urbanmyth.org/microcode/>.
+ This option selects the general module only, you need to select
+ at least one vendor specific module as well.
To compile this driver as a module, choose M here: the
module will be called microcode.
-config MICROCODE_OLD_INTERFACE
+config MICROCODE_INTEL
+ bool "Intel microcode patch loading support"
+ depends on MICROCODE
+ default MICROCODE
+ select FW_LOADER
+ --help---
+ This options enables microcode patch loading support for Intel
+ processors.
+
+ For latest news and information on obtaining all the required
+ Intel ingredients for this driver, check:
+ <http://www.urbanmyth.org/microcode/>.
+
+config MICROCODE_AMD
+ bool "AMD microcode patch loading support"
+ depends on MICROCODE
+ select FW_LOADER
+ --help---
+ If you select this option, microcode patch loading support for AMD
+ processors will be enabled.
+
+ config MICROCODE_OLD_INTERFACE
def_bool y
depends on MICROCODE
obj-$(CONFIG_MCA) += mca_32.o
obj-$(CONFIG_X86_MSR) += msr.o
obj-$(CONFIG_X86_CPUID) += cpuid.o
-obj-$(CONFIG_MICROCODE) += microcode.o
obj-$(CONFIG_PCI) += early-quirks.o
apm-y := apm_32.o
obj-$(CONFIG_APM) += apm.o
obj-$(CONFIG_OLPC) += olpc.o
+microcode-y := microcode_core.o
+microcode-$(CONFIG_MICROCODE_INTEL) += microcode_intel.o
+microcode-$(CONFIG_MICROCODE_AMD) += microcode_amd.o
+obj-$(CONFIG_MICROCODE) += microcode.o
+
###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
+++ /dev/null
-/*
- * Intel CPU Microcode Update Driver for Linux
- *
- * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
- * 2006 Shaohua Li <shaohua.li@intel.com>
- *
- * This driver allows to upgrade microcode on Intel processors
- * belonging to IA-32 family - PentiumPro, Pentium II,
- * Pentium III, Xeon, Pentium 4, etc.
- *
- * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture
- * Software Developer's Manual
- * Order Number 253668 or free download from:
- *
- * http://developer.intel.com/design/pentium4/manuals/253668.htm
- *
- * For more information, go to http://www.urbanmyth.org/microcode
- *
- * 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.
- *
- * 1.0 16 Feb 2000, Tigran Aivazian <tigran@sco.com>
- * Initial release.
- * 1.01 18 Feb 2000, Tigran Aivazian <tigran@sco.com>
- * Added read() support + cleanups.
- * 1.02 21 Feb 2000, Tigran Aivazian <tigran@sco.com>
- * Added 'device trimming' support. open(O_WRONLY) zeroes
- * and frees the saved copy of applied microcode.
- * 1.03 29 Feb 2000, Tigran Aivazian <tigran@sco.com>
- * Made to use devfs (/dev/cpu/microcode) + cleanups.
- * 1.04 06 Jun 2000, Simon Trimmer <simon@veritas.com>
- * Added misc device support (now uses both devfs and misc).
- * Added MICROCODE_IOCFREE ioctl to clear memory.
- * 1.05 09 Jun 2000, Simon Trimmer <simon@veritas.com>
- * Messages for error cases (non Intel & no suitable microcode).
- * 1.06 03 Aug 2000, Tigran Aivazian <tigran@veritas.com>
- * Removed ->release(). Removed exclusive open and status bitmap.
- * Added microcode_rwsem to serialize read()/write()/ioctl().
- * Removed global kernel lock usage.
- * 1.07 07 Sep 2000, Tigran Aivazian <tigran@veritas.com>
- * Write 0 to 0x8B msr and then cpuid before reading revision,
- * so that it works even if there were no update done by the
- * BIOS. Otherwise, reading from 0x8B gives junk (which happened
- * to be 0 on my machine which is why it worked even when I
- * disabled update by the BIOS)
- * Thanks to Eric W. Biederman <ebiederman@lnxi.com> for the fix.
- * 1.08 11 Dec 2000, Richard Schaal <richard.schaal@intel.com> and
- * Tigran Aivazian <tigran@veritas.com>
- * Intel Pentium 4 processor support and bugfixes.
- * 1.09 30 Oct 2001, Tigran Aivazian <tigran@veritas.com>
- * Bugfix for HT (Hyper-Threading) enabled processors
- * whereby processor resources are shared by all logical processors
- * in a single CPU package.
- * 1.10 28 Feb 2002 Asit K Mallick <asit.k.mallick@intel.com> and
- * Tigran Aivazian <tigran@veritas.com>,
- * Serialize updates as required on HT processors due to speculative
- * nature of implementation.
- * 1.11 22 Mar 2002 Tigran Aivazian <tigran@veritas.com>
- * Fix the panic when writing zero-length microcode chunk.
- * 1.12 29 Sep 2003 Nitin Kamble <nitin.a.kamble@intel.com>,
- * Jun Nakajima <jun.nakajima@intel.com>
- * Support for the microcode updates in the new format.
- * 1.13 10 Oct 2003 Tigran Aivazian <tigran@veritas.com>
- * Removed ->read() method and obsoleted MICROCODE_IOCFREE ioctl
- * because we no longer hold a copy of applied microcode
- * in kernel memory.
- * 1.14 25 Jun 2004 Tigran Aivazian <tigran@veritas.com>
- * Fix sigmatch() macro to handle old CPUs with pf == 0.
- * Thanks to Stuart Swales for pointing out this bug.
- */
-
-//#define DEBUG /* pr_debug */
-#include <linux/capability.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/smp_lock.h>
-#include <linux/cpumask.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/miscdevice.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/mutex.h>
-#include <linux/cpu.h>
-#include <linux/firmware.h>
-#include <linux/platform_device.h>
-
-#include <asm/msr.h>
-#include <asm/uaccess.h>
-#include <asm/processor.h>
-
-MODULE_DESCRIPTION("Intel CPU (IA-32) Microcode Update Driver");
-MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
-MODULE_LICENSE("GPL");
-
-#define MICROCODE_VERSION "1.14a"
-
-#define DEFAULT_UCODE_DATASIZE (2000) /* 2000 bytes */
-#define MC_HEADER_SIZE (sizeof (microcode_header_t)) /* 48 bytes */
-#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 2048 bytes */
-#define EXT_HEADER_SIZE (sizeof (struct extended_sigtable)) /* 20 bytes */
-#define EXT_SIGNATURE_SIZE (sizeof (struct extended_signature)) /* 12 bytes */
-#define DWSIZE (sizeof (u32))
-#define get_totalsize(mc) \
- (((microcode_t *)mc)->hdr.totalsize ? \
- ((microcode_t *)mc)->hdr.totalsize : DEFAULT_UCODE_TOTALSIZE)
-#define get_datasize(mc) \
- (((microcode_t *)mc)->hdr.datasize ? \
- ((microcode_t *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE)
-
-#define sigmatch(s1, s2, p1, p2) \
- (((s1) == (s2)) && (((p1) & (p2)) || (((p1) == 0) && ((p2) == 0))))
-
-#define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
-
-/* serialize access to the physical write to MSR 0x79 */
-static DEFINE_SPINLOCK(microcode_update_lock);
-
-/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
-static DEFINE_MUTEX(microcode_mutex);
-
-static struct ucode_cpu_info {
- int valid;
- unsigned int sig;
- unsigned int pf;
- unsigned int rev;
- microcode_t *mc;
-} ucode_cpu_info[NR_CPUS];
-
-static void collect_cpu_info(int cpu_num)
-{
- struct cpuinfo_x86 *c = &cpu_data(cpu_num);
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
- unsigned int val[2];
-
- /* We should bind the task to the CPU */
- BUG_ON(raw_smp_processor_id() != cpu_num);
- uci->pf = uci->rev = 0;
- uci->mc = NULL;
- uci->valid = 1;
-
- if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
- cpu_has(c, X86_FEATURE_IA64)) {
- printk(KERN_ERR "microcode: CPU%d not a capable Intel "
- "processor\n", cpu_num);
- uci->valid = 0;
- return;
- }
-
- uci->sig = cpuid_eax(0x00000001);
-
- if ((c->x86_model >= 5) || (c->x86 > 6)) {
- /* get processor flags from MSR 0x17 */
- rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
- uci->pf = 1 << ((val[1] >> 18) & 7);
- }
-
- wrmsr(MSR_IA32_UCODE_REV, 0, 0);
- /* see notes above for revision 1.07. Apparent chip bug */
- sync_core();
- /* get the current revision from MSR 0x8B */
- rdmsr(MSR_IA32_UCODE_REV, val[0], uci->rev);
- pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n",
- uci->sig, uci->pf, uci->rev);
-}
-
-static inline int microcode_update_match(int cpu_num,
- microcode_header_t *mc_header, int sig, int pf)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
-
- if (!sigmatch(sig, uci->sig, pf, uci->pf)
- || mc_header->rev <= uci->rev)
- return 0;
- return 1;
-}
-
-static int microcode_sanity_check(void *mc)
-{
- microcode_header_t *mc_header = mc;
- struct extended_sigtable *ext_header = NULL;
- struct extended_signature *ext_sig;
- unsigned long total_size, data_size, ext_table_size;
- int sum, orig_sum, ext_sigcount = 0, i;
-
- total_size = get_totalsize(mc_header);
- data_size = get_datasize(mc_header);
- if (data_size + MC_HEADER_SIZE > total_size) {
- printk(KERN_ERR "microcode: error! "
- "Bad data size in microcode data file\n");
- return -EINVAL;
- }
-
- if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
- printk(KERN_ERR "microcode: error! "
- "Unknown microcode update format\n");
- return -EINVAL;
- }
- ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
- if (ext_table_size) {
- if ((ext_table_size < EXT_HEADER_SIZE)
- || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
- printk(KERN_ERR "microcode: error! "
- "Small exttable size in microcode data file\n");
- return -EINVAL;
- }
- ext_header = mc + MC_HEADER_SIZE + data_size;
- if (ext_table_size != exttable_size(ext_header)) {
- printk(KERN_ERR "microcode: error! "
- "Bad exttable size in microcode data file\n");
- return -EFAULT;
- }
- ext_sigcount = ext_header->count;
- }
-
- /* check extended table checksum */
- if (ext_table_size) {
- int ext_table_sum = 0;
- int *ext_tablep = (int *)ext_header;
-
- i = ext_table_size / DWSIZE;
- while (i--)
- ext_table_sum += ext_tablep[i];
- if (ext_table_sum) {
- printk(KERN_WARNING "microcode: aborting, "
- "bad extended signature table checksum\n");
- return -EINVAL;
- }
- }
-
- /* calculate the checksum */
- orig_sum = 0;
- i = (MC_HEADER_SIZE + data_size) / DWSIZE;
- while (i--)
- orig_sum += ((int *)mc)[i];
- if (orig_sum) {
- printk(KERN_ERR "microcode: aborting, bad checksum\n");
- return -EINVAL;
- }
- if (!ext_table_size)
- return 0;
- /* check extended signature checksum */
- for (i = 0; i < ext_sigcount; i++) {
- ext_sig = (void *)ext_header + EXT_HEADER_SIZE +
- EXT_SIGNATURE_SIZE * i;
- sum = orig_sum
- - (mc_header->sig + mc_header->pf + mc_header->cksum)
- + (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
- if (sum) {
- printk(KERN_ERR "microcode: aborting, bad checksum\n");
- return -EINVAL;
- }
- }
- return 0;
-}
-
-/*
- * return 0 - no update found
- * return 1 - found update
- * return < 0 - error
- */
-static int get_maching_microcode(void *mc, int cpu)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- microcode_header_t *mc_header = mc;
- struct extended_sigtable *ext_header;
- unsigned long total_size = get_totalsize(mc_header);
- int ext_sigcount, i;
- struct extended_signature *ext_sig;
- void *new_mc;
-
- if (microcode_update_match(cpu, mc_header,
- mc_header->sig, mc_header->pf))
- goto find;
-
- if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE)
- return 0;
-
- ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE;
- ext_sigcount = ext_header->count;
- ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
- for (i = 0; i < ext_sigcount; i++) {
- if (microcode_update_match(cpu, mc_header,
- ext_sig->sig, ext_sig->pf))
- goto find;
- ext_sig++;
- }
- return 0;
-find:
- pr_debug("microcode: CPU%d found a matching microcode update with"
- " version 0x%x (current=0x%x)\n", cpu, mc_header->rev,uci->rev);
- new_mc = vmalloc(total_size);
- if (!new_mc) {
- printk(KERN_ERR "microcode: error! Can not allocate memory\n");
- return -ENOMEM;
- }
-
- /* free previous update file */
- vfree(uci->mc);
-
- memcpy(new_mc, mc, total_size);
- uci->mc = new_mc;
- return 1;
-}
-
-static void apply_microcode(int cpu)
-{
- unsigned long flags;
- unsigned int val[2];
- int cpu_num = raw_smp_processor_id();
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
-
- /* We should bind the task to the CPU */
- BUG_ON(cpu_num != cpu);
-
- if (uci->mc == NULL)
- return;
-
- /* serialize access to the physical write to MSR 0x79 */
- spin_lock_irqsave(µcode_update_lock, flags);
-
- /* write microcode via MSR 0x79 */
- wrmsr(MSR_IA32_UCODE_WRITE,
- (unsigned long) uci->mc->bits,
- (unsigned long) uci->mc->bits >> 16 >> 16);
- wrmsr(MSR_IA32_UCODE_REV, 0, 0);
-
- /* see notes above for revision 1.07. Apparent chip bug */
- sync_core();
-
- /* get the current revision from MSR 0x8B */
- rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
-
- spin_unlock_irqrestore(µcode_update_lock, flags);
- if (val[1] != uci->mc->hdr.rev) {
- printk(KERN_ERR "microcode: CPU%d update from revision "
- "0x%x to 0x%x failed\n", cpu_num, uci->rev, val[1]);
- return;
- }
- printk(KERN_INFO "microcode: CPU%d updated from revision "
- "0x%x to 0x%x, date = %08x \n",
- cpu_num, uci->rev, val[1], uci->mc->hdr.date);
- uci->rev = val[1];
-}
-
-#ifdef CONFIG_MICROCODE_OLD_INTERFACE
-static void __user *user_buffer; /* user area microcode data buffer */
-static unsigned int user_buffer_size; /* it's size */
-
-static long get_next_ucode(void **mc, long offset)
-{
- microcode_header_t mc_header;
- unsigned long total_size;
-
- /* No more data */
- if (offset >= user_buffer_size)
- return 0;
- if (copy_from_user(&mc_header, user_buffer + offset, MC_HEADER_SIZE)) {
- printk(KERN_ERR "microcode: error! Can not read user data\n");
- return -EFAULT;
- }
- total_size = get_totalsize(&mc_header);
- if (offset + total_size > user_buffer_size) {
- printk(KERN_ERR "microcode: error! Bad total size in microcode "
- "data file\n");
- return -EINVAL;
- }
- *mc = vmalloc(total_size);
- if (!*mc)
- return -ENOMEM;
- if (copy_from_user(*mc, user_buffer + offset, total_size)) {
- printk(KERN_ERR "microcode: error! Can not read user data\n");
- vfree(*mc);
- return -EFAULT;
- }
- return offset + total_size;
-}
-
-static int do_microcode_update (void)
-{
- long cursor = 0;
- int error = 0;
- void *new_mc = NULL;
- int cpu;
- cpumask_t old;
-
- old = current->cpus_allowed;
-
- while ((cursor = get_next_ucode(&new_mc, cursor)) > 0) {
- error = microcode_sanity_check(new_mc);
- if (error)
- goto out;
- /*
- * It's possible the data file has multiple matching ucode,
- * lets keep searching till the latest version
- */
- for_each_online_cpu(cpu) {
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-
- if (!uci->valid)
- continue;
- set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
- error = get_maching_microcode(new_mc, cpu);
- if (error < 0)
- goto out;
- if (error == 1)
- apply_microcode(cpu);
- }
- vfree(new_mc);
- }
-out:
- if (cursor > 0)
- vfree(new_mc);
- if (cursor < 0)
- error = cursor;
- set_cpus_allowed_ptr(current, &old);
- return error;
-}
-
-static int microcode_open (struct inode *unused1, struct file *unused2)
-{
- cycle_kernel_lock();
- return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
-}
-
-static ssize_t microcode_write (struct file *file, const char __user *buf, size_t len, loff_t *ppos)
-{
- ssize_t ret;
-
- if ((len >> PAGE_SHIFT) > num_physpages) {
- printk(KERN_ERR "microcode: too much data (max %ld pages)\n", num_physpages);
- return -EINVAL;
- }
-
- get_online_cpus();
- mutex_lock(µcode_mutex);
-
- user_buffer = (void __user *) buf;
- user_buffer_size = (int) len;
-
- ret = do_microcode_update();
- if (!ret)
- ret = (ssize_t)len;
-
- mutex_unlock(µcode_mutex);
- put_online_cpus();
-
- return ret;
-}
-
-static const struct file_operations microcode_fops = {
- .owner = THIS_MODULE,
- .write = microcode_write,
- .open = microcode_open,
-};
-
-static struct miscdevice microcode_dev = {
- .minor = MICROCODE_MINOR,
- .name = "microcode",
- .fops = µcode_fops,
-};
-
-static int __init microcode_dev_init (void)
-{
- int error;
-
- error = misc_register(µcode_dev);
- if (error) {
- printk(KERN_ERR
- "microcode: can't misc_register on minor=%d\n",
- MICROCODE_MINOR);
- return error;
- }
-
- return 0;
-}
-
-static void microcode_dev_exit (void)
-{
- misc_deregister(µcode_dev);
-}
-
-MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
-#else
-#define microcode_dev_init() 0
-#define microcode_dev_exit() do { } while(0)
-#endif
-
-static long get_next_ucode_from_buffer(void **mc, const u8 *buf,
- unsigned long size, long offset)
-{
- microcode_header_t *mc_header;
- unsigned long total_size;
-
- /* No more data */
- if (offset >= size)
- return 0;
- mc_header = (microcode_header_t *)(buf + offset);
- total_size = get_totalsize(mc_header);
-
- if (offset + total_size > size) {
- printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
- return -EINVAL;
- }
-
- *mc = vmalloc(total_size);
- if (!*mc) {
- printk(KERN_ERR "microcode: error! Can not allocate memory\n");
- return -ENOMEM;
- }
- memcpy(*mc, buf + offset, total_size);
- return offset + total_size;
-}
-
-/* fake device for request_firmware */
-static struct platform_device *microcode_pdev;
-
-static int cpu_request_microcode(int cpu)
-{
- char name[30];
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- const struct firmware *firmware;
- const u8 *buf;
- unsigned long size;
- long offset = 0;
- int error;
- void *mc;
-
- /* We should bind the task to the CPU */
- BUG_ON(cpu != raw_smp_processor_id());
- sprintf(name,"intel-ucode/%02x-%02x-%02x",
- c->x86, c->x86_model, c->x86_mask);
- error = request_firmware(&firmware, name, µcode_pdev->dev);
- if (error) {
- pr_debug("microcode: data file %s load failed\n", name);
- return error;
- }
- buf = firmware->data;
- size = firmware->size;
- while ((offset = get_next_ucode_from_buffer(&mc, buf, size, offset))
- > 0) {
- error = microcode_sanity_check(mc);
- if (error)
- break;
- error = get_maching_microcode(mc, cpu);
- if (error < 0)
- break;
- /*
- * It's possible the data file has multiple matching ucode,
- * lets keep searching till the latest version
- */
- if (error == 1) {
- apply_microcode(cpu);
- error = 0;
- }
- vfree(mc);
- }
- if (offset > 0)
- vfree(mc);
- if (offset < 0)
- error = offset;
- release_firmware(firmware);
-
- return error;
-}
-
-static int apply_microcode_check_cpu(int cpu)
-{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- cpumask_t old;
- unsigned int val[2];
- int err = 0;
-
- /* Check if the microcode is available */
- if (!uci->mc)
- return 0;
-
- old = current->cpus_allowed;
- set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
-
- /* Check if the microcode we have in memory matches the CPU */
- if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
- cpu_has(c, X86_FEATURE_IA64) || uci->sig != cpuid_eax(0x00000001))
- err = -EINVAL;
-
- if (!err && ((c->x86_model >= 5) || (c->x86 > 6))) {
- /* get processor flags from MSR 0x17 */
- rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
- if (uci->pf != (1 << ((val[1] >> 18) & 7)))
- err = -EINVAL;
- }
-
- if (!err) {
- wrmsr(MSR_IA32_UCODE_REV, 0, 0);
- /* see notes above for revision 1.07. Apparent chip bug */
- sync_core();
- /* get the current revision from MSR 0x8B */
- rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
- if (uci->rev != val[1])
- err = -EINVAL;
- }
-
- if (!err)
- apply_microcode(cpu);
- else
- printk(KERN_ERR "microcode: Could not apply microcode to CPU%d:"
- " sig=0x%x, pf=0x%x, rev=0x%x\n",
- cpu, uci->sig, uci->pf, uci->rev);
-
- set_cpus_allowed_ptr(current, &old);
- return err;
-}
-
-static void microcode_init_cpu(int cpu, int resume)
-{
- cpumask_t old;
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-
- old = current->cpus_allowed;
-
- set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
- mutex_lock(µcode_mutex);
- collect_cpu_info(cpu);
- if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
- cpu_request_microcode(cpu);
- mutex_unlock(µcode_mutex);
- set_cpus_allowed_ptr(current, &old);
-}
-
-static void microcode_fini_cpu(int cpu)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-
- mutex_lock(µcode_mutex);
- uci->valid = 0;
- vfree(uci->mc);
- uci->mc = NULL;
- mutex_unlock(µcode_mutex);
-}
-
-static ssize_t reload_store(struct sys_device *dev,
- struct sysdev_attribute *attr,
- const char *buf, size_t sz)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
- char *end;
- unsigned long val = simple_strtoul(buf, &end, 0);
- int err = 0;
- int cpu = dev->id;
-
- if (end == buf)
- return -EINVAL;
- if (val == 1) {
- cpumask_t old = current->cpus_allowed;
-
- get_online_cpus();
- set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
-
- mutex_lock(µcode_mutex);
- if (uci->valid)
- err = cpu_request_microcode(cpu);
- mutex_unlock(µcode_mutex);
- put_online_cpus();
- set_cpus_allowed_ptr(current, &old);
- }
- if (err)
- return err;
- return sz;
-}
-
-static ssize_t version_show(struct sys_device *dev,
- struct sysdev_attribute *attr, char *buf)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
-
- return sprintf(buf, "0x%x\n", uci->rev);
-}
-
-static ssize_t pf_show(struct sys_device *dev,
- struct sysdev_attribute *attr, char *buf)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
-
- return sprintf(buf, "0x%x\n", uci->pf);
-}
-
-static SYSDEV_ATTR(reload, 0200, NULL, reload_store);
-static SYSDEV_ATTR(version, 0400, version_show, NULL);
-static SYSDEV_ATTR(processor_flags, 0400, pf_show, NULL);
-
-static struct attribute *mc_default_attrs[] = {
- &attr_reload.attr,
- &attr_version.attr,
- &attr_processor_flags.attr,
- NULL
-};
-
-static struct attribute_group mc_attr_group = {
- .attrs = mc_default_attrs,
- .name = "microcode",
-};
-
-static int __mc_sysdev_add(struct sys_device *sys_dev, int resume)
-{
- int err, cpu = sys_dev->id;
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-
- if (!cpu_online(cpu))
- return 0;
-
- pr_debug("microcode: CPU%d added\n", cpu);
- memset(uci, 0, sizeof(*uci));
-
- err = sysfs_create_group(&sys_dev->kobj, &mc_attr_group);
- if (err)
- return err;
-
- microcode_init_cpu(cpu, resume);
-
- return 0;
-}
-
-static int mc_sysdev_add(struct sys_device *sys_dev)
-{
- return __mc_sysdev_add(sys_dev, 0);
-}
-
-static int mc_sysdev_remove(struct sys_device *sys_dev)
-{
- int cpu = sys_dev->id;
-
- if (!cpu_online(cpu))
- return 0;
-
- pr_debug("microcode: CPU%d removed\n", cpu);
- microcode_fini_cpu(cpu);
- sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
- return 0;
-}
-
-static int mc_sysdev_resume(struct sys_device *dev)
-{
- int cpu = dev->id;
-
- if (!cpu_online(cpu))
- return 0;
- pr_debug("microcode: CPU%d resumed\n", cpu);
- /* only CPU 0 will apply ucode here */
- apply_microcode(0);
- return 0;
-}
-
-static struct sysdev_driver mc_sysdev_driver = {
- .add = mc_sysdev_add,
- .remove = mc_sysdev_remove,
- .resume = mc_sysdev_resume,
-};
-
-static __cpuinit int
-mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
- struct sys_device *sys_dev;
-
- sys_dev = get_cpu_sysdev(cpu);
- switch (action) {
- case CPU_UP_CANCELED_FROZEN:
- /* The CPU refused to come up during a system resume */
- microcode_fini_cpu(cpu);
- break;
- case CPU_ONLINE:
- case CPU_DOWN_FAILED:
- mc_sysdev_add(sys_dev);
- break;
- case CPU_ONLINE_FROZEN:
- /* System-wide resume is in progress, try to apply microcode */
- if (apply_microcode_check_cpu(cpu)) {
- /* The application of microcode failed */
- microcode_fini_cpu(cpu);
- __mc_sysdev_add(sys_dev, 1);
- break;
- }
- case CPU_DOWN_FAILED_FROZEN:
- if (sysfs_create_group(&sys_dev->kobj, &mc_attr_group))
- printk(KERN_ERR "microcode: Failed to create the sysfs "
- "group for CPU%d\n", cpu);
- break;
- case CPU_DOWN_PREPARE:
- mc_sysdev_remove(sys_dev);
- break;
- case CPU_DOWN_PREPARE_FROZEN:
- /* Suspend is in progress, only remove the interface */
- sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
- break;
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block __refdata mc_cpu_notifier = {
- .notifier_call = mc_cpu_callback,
-};
-
-static int __init microcode_init (void)
-{
- int error;
-
- printk(KERN_INFO
- "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
-
- error = microcode_dev_init();
- if (error)
- return error;
- microcode_pdev = platform_device_register_simple("microcode", -1,
- NULL, 0);
- if (IS_ERR(microcode_pdev)) {
- microcode_dev_exit();
- return PTR_ERR(microcode_pdev);
- }
-
- get_online_cpus();
- error = sysdev_driver_register(&cpu_sysdev_class, &mc_sysdev_driver);
- put_online_cpus();
- if (error) {
- microcode_dev_exit();
- platform_device_unregister(microcode_pdev);
- return error;
- }
-
- register_hotcpu_notifier(&mc_cpu_notifier);
- return 0;
-}
-
-static void __exit microcode_exit (void)
-{
- microcode_dev_exit();
-
- unregister_hotcpu_notifier(&mc_cpu_notifier);
-
- get_online_cpus();
- sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
- put_online_cpus();
-
- platform_device_unregister(microcode_pdev);
-}
-
-module_init(microcode_init)
-module_exit(microcode_exit)
--- /dev/null
+/*
+ * AMD CPU Microcode Update Driver for Linux
+ * Copyright (C) 2008 Advanced Micro Devices Inc.
+ *
+ * Author: Peter Oruba <peter.oruba@amd.com>
+ *
+ * Based on work by:
+ * Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
+ *
+ * This driver allows to upgrade microcode on AMD
+ * family 0x10 and 0x11 processors.
+ *
+ * Licensed unter the terms of the GNU General Public
+ * License version 2. See file COPYING for details.
+*/
+
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/cpumask.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/miscdevice.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/cpu.h>
+#include <linux/firmware.h>
+#include <linux/platform_device.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+
+#include <asm/msr.h>
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+#include <asm/microcode.h>
+
+MODULE_DESCRIPTION("AMD Microcode Update Driver");
+MODULE_AUTHOR("Peter Oruba <peter.oruba@amd.com>");
+MODULE_LICENSE("GPL v2");
+
+#define UCODE_MAGIC 0x00414d44
+#define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000
+#define UCODE_UCODE_TYPE 0x00000001
+
+struct equiv_cpu_entry {
+ unsigned int installed_cpu;
+ unsigned int fixed_errata_mask;
+ unsigned int fixed_errata_compare;
+ unsigned int equiv_cpu;
+};
+
+struct microcode_header_amd {
+ unsigned int data_code;
+ unsigned int patch_id;
+ unsigned char mc_patch_data_id[2];
+ unsigned char mc_patch_data_len;
+ unsigned char init_flag;
+ unsigned int mc_patch_data_checksum;
+ unsigned int nb_dev_id;
+ unsigned int sb_dev_id;
+ unsigned char processor_rev_id[2];
+ unsigned char nb_rev_id;
+ unsigned char sb_rev_id;
+ unsigned char bios_api_rev;
+ unsigned char reserved1[3];
+ unsigned int match_reg[8];
+};
+
+struct microcode_amd {
+ struct microcode_header_amd hdr;
+ unsigned int mpb[0];
+};
+
+#define UCODE_MAX_SIZE (2048)
+#define DEFAULT_UCODE_DATASIZE (896)
+#define MC_HEADER_SIZE (sizeof(struct microcode_header_amd))
+#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
+#define DWSIZE (sizeof(u32))
+/* For now we support a fixed ucode total size only */
+#define get_totalsize(mc) \
+ ((((struct microcode_amd *)mc)->hdr.mc_patch_data_len * 28) \
+ + MC_HEADER_SIZE)
+
+/* serialize access to the physical write */
+static DEFINE_SPINLOCK(microcode_update_lock);
+
+static struct equiv_cpu_entry *equiv_cpu_table;
+
+static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
+{
+ struct cpuinfo_x86 *c = &cpu_data(cpu);
+
+ memset(csig, 0, sizeof(*csig));
+
+ if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
+ printk(KERN_ERR "microcode: CPU%d not a capable AMD processor\n",
+ cpu);
+ return -1;
+ }
+
+ asm volatile("movl %1, %%ecx; rdmsr"
+ : "=a" (csig->rev)
+ : "i" (0x0000008B) : "ecx");
+
+ printk(KERN_INFO "microcode: collect_cpu_info_amd : patch_id=0x%x\n",
+ csig->rev);
+
+ return 0;
+}
+
+static int get_matching_microcode(int cpu, void *mc, int rev)
+{
+ struct microcode_header_amd *mc_header = mc;
+ struct pci_dev *nb_pci_dev, *sb_pci_dev;
+ unsigned int current_cpu_id;
+ unsigned int equiv_cpu_id = 0x00;
+ unsigned int i = 0;
+
+ /*
+ * FIXME! dimm: do we need this? Why an update via /dev/... is different
+ * from the one via firmware?
+ *
+ * This is a tricky part. We might be called from a write operation
+ * to the device file instead of the usual process of firmware
+ * loading. This routine needs to be able to distinguish both
+ * cases. This is done by checking if there alread is a equivalent
+ * CPU table installed. If not, we're written through
+ * /dev/cpu/microcode.
+ * Since we ignore all checks. The error case in which going through
+ * firmware loading and that table is not loaded has already been
+ * checked earlier.
+ */
+ BUG_ON(equiv_cpu_table == NULL);
+#if 0
+ if (equiv_cpu_table == NULL) {
+ printk(KERN_INFO "microcode: CPU%d microcode update with "
+ "version 0x%x (current=0x%x)\n",
+ cpu, mc_header->patch_id, uci->cpu_sig.rev);
+ goto out;
+ }
+#endif
+ current_cpu_id = cpuid_eax(0x00000001);
+
+ while (equiv_cpu_table[i].installed_cpu != 0) {
+ if (current_cpu_id == equiv_cpu_table[i].installed_cpu) {
+ equiv_cpu_id = equiv_cpu_table[i].equiv_cpu;
+ break;
+ }
+ i++;
+ }
+
+ if (!equiv_cpu_id) {
+ printk(KERN_ERR "microcode: CPU%d cpu_id "
+ "not found in equivalent cpu table \n", cpu);
+ return 0;
+ }
+
+ if ((mc_header->processor_rev_id[0]) != (equiv_cpu_id & 0xff)) {
+ printk(KERN_ERR
+ "microcode: CPU%d patch does not match "
+ "(patch is %x, cpu extended is %x) \n",
+ cpu, mc_header->processor_rev_id[0],
+ (equiv_cpu_id & 0xff));
+ return 0;
+ }
+
+ if ((mc_header->processor_rev_id[1]) != ((equiv_cpu_id >> 16) & 0xff)) {
+ printk(KERN_ERR "microcode: CPU%d patch does not match "
+ "(patch is %x, cpu base id is %x) \n",
+ cpu, mc_header->processor_rev_id[1],
+ ((equiv_cpu_id >> 16) & 0xff));
+
+ return 0;
+ }
+
+ /* ucode may be northbridge specific */
+ if (mc_header->nb_dev_id) {
+ nb_pci_dev = pci_get_device(PCI_VENDOR_ID_AMD,
+ (mc_header->nb_dev_id & 0xff),
+ NULL);
+ if ((!nb_pci_dev) ||
+ (mc_header->nb_rev_id != nb_pci_dev->revision)) {
+ printk(KERN_ERR "microcode: CPU%d NB mismatch \n", cpu);
+ pci_dev_put(nb_pci_dev);
+ return 0;
+ }
+ pci_dev_put(nb_pci_dev);
+ }
+
+ /* ucode may be southbridge specific */
+ if (mc_header->sb_dev_id) {
+ sb_pci_dev = pci_get_device(PCI_VENDOR_ID_AMD,
+ (mc_header->sb_dev_id & 0xff),
+ NULL);
+ if ((!sb_pci_dev) ||
+ (mc_header->sb_rev_id != sb_pci_dev->revision)) {
+ printk(KERN_ERR "microcode: CPU%d SB mismatch \n", cpu);
+ pci_dev_put(sb_pci_dev);
+ return 0;
+ }
+ pci_dev_put(sb_pci_dev);
+ }
+
+ if (mc_header->patch_id <= rev)
+ return 0;
+
+ return 1;
+}
+
+static void apply_microcode_amd(int cpu)
+{
+ unsigned long flags;
+ unsigned int eax, edx;
+ unsigned int rev;
+ int cpu_num = raw_smp_processor_id();
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
+ struct microcode_amd *mc_amd = uci->mc;
+ unsigned long addr;
+
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu_num != cpu);
+
+ if (mc_amd == NULL)
+ return;
+
+ spin_lock_irqsave(µcode_update_lock, flags);
+
+ addr = (unsigned long)&mc_amd->hdr.data_code;
+ edx = (unsigned int)(((unsigned long)upper_32_bits(addr)));
+ eax = (unsigned int)(((unsigned long)lower_32_bits(addr)));
+
+ asm volatile("movl %0, %%ecx; wrmsr" :
+ : "i" (0xc0010020), "a" (eax), "d" (edx) : "ecx");
+
+ /* get patch id after patching */
+ asm volatile("movl %1, %%ecx; rdmsr"
+ : "=a" (rev)
+ : "i" (0x0000008B) : "ecx");
+
+ spin_unlock_irqrestore(µcode_update_lock, flags);
+
+ /* check current patch id and patch's id for match */
+ if (rev != mc_amd->hdr.patch_id) {
+ printk(KERN_ERR "microcode: CPU%d update from revision "
+ "0x%x to 0x%x failed\n", cpu_num,
+ mc_amd->hdr.patch_id, rev);
+ return;
+ }
+
+ printk(KERN_INFO "microcode: CPU%d updated from revision "
+ "0x%x to 0x%x \n",
+ cpu_num, uci->cpu_sig.rev, mc_amd->hdr.patch_id);
+
+ uci->cpu_sig.rev = rev;
+}
+
+static void * get_next_ucode(u8 *buf, unsigned int size,
+ int (*get_ucode_data)(void *, const void *, size_t),
+ unsigned int *mc_size)
+{
+ unsigned int total_size;
+#define UCODE_CONTAINER_SECTION_HDR 8
+ u8 section_hdr[UCODE_CONTAINER_SECTION_HDR];
+ void *mc;
+
+ if (get_ucode_data(section_hdr, buf, UCODE_CONTAINER_SECTION_HDR))
+ return NULL;
+
+ if (section_hdr[0] != UCODE_UCODE_TYPE) {
+ printk(KERN_ERR "microcode: error! "
+ "Wrong microcode payload type field\n");
+ return NULL;
+ }
+
+ total_size = (unsigned long) (section_hdr[4] + (section_hdr[5] << 8));
+
+ printk(KERN_INFO "microcode: size %u, total_size %u\n",
+ size, total_size);
+
+ if (total_size > size || total_size > UCODE_MAX_SIZE) {
+ printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
+ return NULL;
+ }
+
+ mc = vmalloc(UCODE_MAX_SIZE);
+ if (mc) {
+ memset(mc, 0, UCODE_MAX_SIZE);
+ if (get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR, total_size)) {
+ vfree(mc);
+ mc = NULL;
+ } else
+ *mc_size = total_size + UCODE_CONTAINER_SECTION_HDR;
+ }
+#undef UCODE_CONTAINER_SECTION_HDR
+ return mc;
+}
+
+
+static int install_equiv_cpu_table(u8 *buf,
+ int (*get_ucode_data)(void *, const void *, size_t))
+{
+#define UCODE_CONTAINER_HEADER_SIZE 12
+ u8 *container_hdr[UCODE_CONTAINER_HEADER_SIZE];
+ unsigned int *buf_pos = (unsigned int *)container_hdr;
+ unsigned long size;
+
+ if (get_ucode_data(&container_hdr, buf, UCODE_CONTAINER_HEADER_SIZE))
+ return 0;
+
+ size = buf_pos[2];
+
+ if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
+ printk(KERN_ERR "microcode: error! "
+ "Wrong microcode equivalnet cpu table\n");
+ return 0;
+ }
+
+ equiv_cpu_table = (struct equiv_cpu_entry *) vmalloc(size);
+ if (!equiv_cpu_table) {
+ printk(KERN_ERR "microcode: error, can't allocate memory for equiv CPU table\n");
+ return 0;
+ }
+
+ buf += UCODE_CONTAINER_HEADER_SIZE;
+ if (get_ucode_data(equiv_cpu_table, buf, size)) {
+ vfree(equiv_cpu_table);
+ return 0;
+ }
+
+ return size + UCODE_CONTAINER_HEADER_SIZE; /* add header length */
+#undef UCODE_CONTAINER_HEADER_SIZE
+}
+
+static void free_equiv_cpu_table(void)
+{
+ if (equiv_cpu_table) {
+ vfree(equiv_cpu_table);
+ equiv_cpu_table = NULL;
+ }
+}
+
+static int generic_load_microcode(int cpu, void *data, size_t size,
+ int (*get_ucode_data)(void *, const void *, size_t))
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ u8 *ucode_ptr = data, *new_mc = NULL, *mc;
+ int new_rev = uci->cpu_sig.rev;
+ unsigned int leftover;
+ unsigned long offset;
+
+ offset = install_equiv_cpu_table(ucode_ptr, get_ucode_data);
+ if (!offset) {
+ printk(KERN_ERR "microcode: installing equivalent cpu table failed\n");
+ return -EINVAL;
+ }
+
+ ucode_ptr += offset;
+ leftover = size - offset;
+
+ while (leftover) {
+ unsigned int mc_size;
+ struct microcode_header_amd *mc_header;
+
+ mc = get_next_ucode(ucode_ptr, leftover, get_ucode_data, &mc_size);
+ if (!mc)
+ break;
+
+ mc_header = (struct microcode_header_amd *)mc;
+ if (get_matching_microcode(cpu, mc, new_rev)) {
+ if (new_mc)
+ vfree(new_mc);
+ new_rev = mc_header->patch_id;
+ new_mc = mc;
+ } else
+ vfree(mc);
+
+ ucode_ptr += mc_size;
+ leftover -= mc_size;
+ }
+
+ if (new_mc) {
+ if (!leftover) {
+ if (uci->mc)
+ vfree(uci->mc);
+ uci->mc = new_mc;
+ pr_debug("microcode: CPU%d found a matching microcode update with"
+ " version 0x%x (current=0x%x)\n",
+ cpu, new_rev, uci->cpu_sig.rev);
+ } else
+ vfree(new_mc);
+ }
+
+ free_equiv_cpu_table();
+
+ return (int)leftover;
+}
+
+static int get_ucode_fw(void *to, const void *from, size_t n)
+{
+ memcpy(to, from, n);
+ return 0;
+}
+
+static int request_microcode_fw(int cpu, struct device *device)
+{
+ const char *fw_name = "amd-ucode/microcode_amd.bin";
+ const struct firmware *firmware;
+ int ret;
+
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu != raw_smp_processor_id());
+
+ ret = request_firmware(&firmware, fw_name, device);
+ if (ret) {
+ printk(KERN_ERR "microcode: ucode data file %s load failed\n", fw_name);
+ return ret;
+ }
+
+ ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
+ &get_ucode_fw);
+
+ release_firmware(firmware);
+
+ return ret;
+}
+
+static int get_ucode_user(void *to, const void *from, size_t n)
+{
+ return copy_from_user(to, from, n);
+}
+
+static int request_microcode_user(int cpu, const void __user *buf, size_t size)
+{
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu != raw_smp_processor_id());
+
+ return generic_load_microcode(cpu, (void*)buf, size, &get_ucode_user);
+}
+
+static void microcode_fini_cpu_amd(int cpu)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+
+ vfree(uci->mc);
+ uci->mc = NULL;
+}
+
+static struct microcode_ops microcode_amd_ops = {
+ .request_microcode_user = request_microcode_user,
+ .request_microcode_fw = request_microcode_fw,
+ .collect_cpu_info = collect_cpu_info_amd,
+ .apply_microcode = apply_microcode_amd,
+ .microcode_fini_cpu = microcode_fini_cpu_amd,
+};
+
+struct microcode_ops * __init init_amd_microcode(void)
+{
+ return µcode_amd_ops;
+}
--- /dev/null
+/*
+ * Intel CPU Microcode Update Driver for Linux
+ *
+ * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
+ * 2006 Shaohua Li <shaohua.li@intel.com>
+ *
+ * This driver allows to upgrade microcode on Intel processors
+ * belonging to IA-32 family - PentiumPro, Pentium II,
+ * Pentium III, Xeon, Pentium 4, etc.
+ *
+ * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture
+ * Software Developer's Manual
+ * Order Number 253668 or free download from:
+ *
+ * http://developer.intel.com/design/pentium4/manuals/253668.htm
+ *
+ * For more information, go to http://www.urbanmyth.org/microcode
+ *
+ * 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.
+ *
+ * 1.0 16 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Initial release.
+ * 1.01 18 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Added read() support + cleanups.
+ * 1.02 21 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Added 'device trimming' support. open(O_WRONLY) zeroes
+ * and frees the saved copy of applied microcode.
+ * 1.03 29 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Made to use devfs (/dev/cpu/microcode) + cleanups.
+ * 1.04 06 Jun 2000, Simon Trimmer <simon@veritas.com>
+ * Added misc device support (now uses both devfs and misc).
+ * Added MICROCODE_IOCFREE ioctl to clear memory.
+ * 1.05 09 Jun 2000, Simon Trimmer <simon@veritas.com>
+ * Messages for error cases (non Intel & no suitable microcode).
+ * 1.06 03 Aug 2000, Tigran Aivazian <tigran@veritas.com>
+ * Removed ->release(). Removed exclusive open and status bitmap.
+ * Added microcode_rwsem to serialize read()/write()/ioctl().
+ * Removed global kernel lock usage.
+ * 1.07 07 Sep 2000, Tigran Aivazian <tigran@veritas.com>
+ * Write 0 to 0x8B msr and then cpuid before reading revision,
+ * so that it works even if there were no update done by the
+ * BIOS. Otherwise, reading from 0x8B gives junk (which happened
+ * to be 0 on my machine which is why it worked even when I
+ * disabled update by the BIOS)
+ * Thanks to Eric W. Biederman <ebiederman@lnxi.com> for the fix.
+ * 1.08 11 Dec 2000, Richard Schaal <richard.schaal@intel.com> and
+ * Tigran Aivazian <tigran@veritas.com>
+ * Intel Pentium 4 processor support and bugfixes.
+ * 1.09 30 Oct 2001, Tigran Aivazian <tigran@veritas.com>
+ * Bugfix for HT (Hyper-Threading) enabled processors
+ * whereby processor resources are shared by all logical processors
+ * in a single CPU package.
+ * 1.10 28 Feb 2002 Asit K Mallick <asit.k.mallick@intel.com> and
+ * Tigran Aivazian <tigran@veritas.com>,
+ * Serialize updates as required on HT processors due to
+ * speculative nature of implementation.
+ * 1.11 22 Mar 2002 Tigran Aivazian <tigran@veritas.com>
+ * Fix the panic when writing zero-length microcode chunk.
+ * 1.12 29 Sep 2003 Nitin Kamble <nitin.a.kamble@intel.com>,
+ * Jun Nakajima <jun.nakajima@intel.com>
+ * Support for the microcode updates in the new format.
+ * 1.13 10 Oct 2003 Tigran Aivazian <tigran@veritas.com>
+ * Removed ->read() method and obsoleted MICROCODE_IOCFREE ioctl
+ * because we no longer hold a copy of applied microcode
+ * in kernel memory.
+ * 1.14 25 Jun 2004 Tigran Aivazian <tigran@veritas.com>
+ * Fix sigmatch() macro to handle old CPUs with pf == 0.
+ * Thanks to Stuart Swales for pointing out this bug.
+ */
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/cpumask.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/miscdevice.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/cpu.h>
+#include <linux/firmware.h>
+#include <linux/platform_device.h>
+
+#include <asm/msr.h>
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+#include <asm/microcode.h>
+
+MODULE_DESCRIPTION("Microcode Update Driver");
+MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
+MODULE_LICENSE("GPL");
+
+#define MICROCODE_VERSION "2.00"
+
+struct microcode_ops *microcode_ops;
+
+/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
+static DEFINE_MUTEX(microcode_mutex);
+
+struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
+EXPORT_SYMBOL_GPL(ucode_cpu_info);
+
+#ifdef CONFIG_MICROCODE_OLD_INTERFACE
+static int do_microcode_update(const void __user *buf, size_t size)
+{
+ cpumask_t old;
+ int error = 0;
+ int cpu;
+
+ old = current->cpus_allowed;
+
+ for_each_online_cpu(cpu) {
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+
+ if (!uci->valid)
+ continue;
+
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
+ error = microcode_ops->request_microcode_user(cpu, buf, size);
+ if (error < 0)
+ goto out;
+ if (!error)
+ microcode_ops->apply_microcode(cpu);
+ }
+out:
+ set_cpus_allowed_ptr(current, &old);
+ return error;
+}
+
+static int microcode_open(struct inode *unused1, struct file *unused2)
+{
+ cycle_kernel_lock();
+ return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+}
+
+static ssize_t microcode_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ ssize_t ret;
+
+ if ((len >> PAGE_SHIFT) > num_physpages) {
+ printk(KERN_ERR "microcode: too much data (max %ld pages)\n",
+ num_physpages);
+ return -EINVAL;
+ }
+
+ get_online_cpus();
+ mutex_lock(µcode_mutex);
+
+ ret = do_microcode_update(buf, len);
+ if (!ret)
+ ret = (ssize_t)len;
+
+ mutex_unlock(µcode_mutex);
+ put_online_cpus();
+
+ return ret;
+}
+
+static const struct file_operations microcode_fops = {
+ .owner = THIS_MODULE,
+ .write = microcode_write,
+ .open = microcode_open,
+};
+
+static struct miscdevice microcode_dev = {
+ .minor = MICROCODE_MINOR,
+ .name = "microcode",
+ .fops = µcode_fops,
+};
+
+static int __init microcode_dev_init(void)
+{
+ int error;
+
+ error = misc_register(µcode_dev);
+ if (error) {
+ printk(KERN_ERR
+ "microcode: can't misc_register on minor=%d\n",
+ MICROCODE_MINOR);
+ return error;
+ }
+
+ return 0;
+}
+
+static void microcode_dev_exit(void)
+{
+ misc_deregister(µcode_dev);
+}
+
+MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
+#else
+#define microcode_dev_init() 0
+#define microcode_dev_exit() do { } while (0)
+#endif
+
+/* fake device for request_firmware */
+struct platform_device *microcode_pdev;
+
+static ssize_t reload_store(struct sys_device *dev,
+ struct sysdev_attribute *attr,
+ const char *buf, size_t sz)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
+ char *end;
+ unsigned long val = simple_strtoul(buf, &end, 0);
+ int err = 0;
+ int cpu = dev->id;
+
+ if (end == buf)
+ return -EINVAL;
+ if (val == 1) {
+ cpumask_t old = current->cpus_allowed;
+
+ get_online_cpus();
+ if (cpu_online(cpu)) {
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
+ mutex_lock(µcode_mutex);
+ if (uci->valid) {
+ err = microcode_ops->request_microcode_fw(cpu,
+ µcode_pdev->dev);
+ if (!err)
+ microcode_ops->apply_microcode(cpu);
+ }
+ mutex_unlock(µcode_mutex);
+ set_cpus_allowed_ptr(current, &old);
+ }
+ put_online_cpus();
+ }
+ if (err)
+ return err;
+ return sz;
+}
+
+static ssize_t version_show(struct sys_device *dev,
+ struct sysdev_attribute *attr, char *buf)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
+
+ return sprintf(buf, "0x%x\n", uci->cpu_sig.rev);
+}
+
+static ssize_t pf_show(struct sys_device *dev,
+ struct sysdev_attribute *attr, char *buf)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
+
+ return sprintf(buf, "0x%x\n", uci->cpu_sig.pf);
+}
+
+static SYSDEV_ATTR(reload, 0200, NULL, reload_store);
+static SYSDEV_ATTR(version, 0400, version_show, NULL);
+static SYSDEV_ATTR(processor_flags, 0400, pf_show, NULL);
+
+static struct attribute *mc_default_attrs[] = {
+ &attr_reload.attr,
+ &attr_version.attr,
+ &attr_processor_flags.attr,
+ NULL
+};
+
+static struct attribute_group mc_attr_group = {
+ .attrs = mc_default_attrs,
+ .name = "microcode",
+};
+
+static void microcode_fini_cpu(int cpu)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+
+ mutex_lock(µcode_mutex);
+ microcode_ops->microcode_fini_cpu(cpu);
+ uci->valid = 0;
+ mutex_unlock(µcode_mutex);
+}
+
+static void collect_cpu_info(int cpu)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+
+ memset(uci, 0, sizeof(*uci));
+ if (!microcode_ops->collect_cpu_info(cpu, &uci->cpu_sig))
+ uci->valid = 1;
+}
+
+static int microcode_resume_cpu(int cpu)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ struct cpu_signature nsig;
+
+ pr_debug("microcode: CPU%d resumed\n", cpu);
+
+ if (!uci->mc)
+ return 1;
+
+ /*
+ * Let's verify that the 'cached' ucode does belong
+ * to this cpu (a bit of paranoia):
+ */
+ if (microcode_ops->collect_cpu_info(cpu, &nsig)) {
+ microcode_fini_cpu(cpu);
+ return -1;
+ }
+
+ if (memcmp(&nsig, &uci->cpu_sig, sizeof(nsig))) {
+ microcode_fini_cpu(cpu);
+ /* Should we look for a new ucode here? */
+ return 1;
+ }
+
+ return 0;
+}
+
+void microcode_update_cpu(int cpu)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ int err = 0;
+
+ /* We should bind the task to the CPU */
+ BUG_ON(raw_smp_processor_id() != cpu);
+
+ mutex_lock(µcode_mutex);
+ /*
+ * Check if the system resume is in progress (uci->valid != NULL),
+ * otherwise just request a firmware:
+ */
+ if (uci->valid) {
+ err = microcode_resume_cpu(cpu);
+ } else {
+ collect_cpu_info(cpu);
+ if (uci->valid && system_state == SYSTEM_RUNNING)
+ err = microcode_ops->request_microcode_fw(cpu,
+ µcode_pdev->dev);
+ }
+
+ if (!err)
+ microcode_ops->apply_microcode(cpu);
+
+ mutex_unlock(µcode_mutex);
+}
+
+static void microcode_init_cpu(int cpu)
+{
+ cpumask_t old = current->cpus_allowed;
+
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
+ microcode_update_cpu(cpu);
+ set_cpus_allowed_ptr(current, &old);
+}
+
+static int mc_sysdev_add(struct sys_device *sys_dev)
+{
+ int err, cpu = sys_dev->id;
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+
+ if (!cpu_online(cpu))
+ return 0;
+
+ pr_debug("microcode: CPU%d added\n", cpu);
+ memset(uci, 0, sizeof(*uci));
+
+ err = sysfs_create_group(&sys_dev->kobj, &mc_attr_group);
+ if (err)
+ return err;
+
+ microcode_init_cpu(cpu);
+ return 0;
+}
+
+static int mc_sysdev_remove(struct sys_device *sys_dev)
+{
+ int cpu = sys_dev->id;
+
+ if (!cpu_online(cpu))
+ return 0;
+
+ pr_debug("microcode: CPU%d removed\n", cpu);
+ microcode_fini_cpu(cpu);
+ sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
+ return 0;
+}
+
+static int mc_sysdev_resume(struct sys_device *dev)
+{
+ int cpu = dev->id;
+
+ if (!cpu_online(cpu))
+ return 0;
+
+ /* only CPU 0 will apply ucode here */
+ microcode_update_cpu(0);
+ return 0;
+}
+
+static struct sysdev_driver mc_sysdev_driver = {
+ .add = mc_sysdev_add,
+ .remove = mc_sysdev_remove,
+ .resume = mc_sysdev_resume,
+};
+
+static __cpuinit int
+mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned long)hcpu;
+ struct sys_device *sys_dev;
+
+ sys_dev = get_cpu_sysdev(cpu);
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ microcode_init_cpu(cpu);
+ case CPU_DOWN_FAILED:
+ case CPU_DOWN_FAILED_FROZEN:
+ pr_debug("microcode: CPU%d added\n", cpu);
+ if (sysfs_create_group(&sys_dev->kobj, &mc_attr_group))
+ printk(KERN_ERR "microcode: Failed to create the sysfs "
+ "group for CPU%d\n", cpu);
+ break;
+ case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
+ /* Suspend is in progress, only remove the interface */
+ sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
+ pr_debug("microcode: CPU%d removed\n", cpu);
+ break;
+ case CPU_DEAD:
+ case CPU_UP_CANCELED_FROZEN:
+ /* The CPU refused to come up during a system resume */
+ microcode_fini_cpu(cpu);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block __refdata mc_cpu_notifier = {
+ .notifier_call = mc_cpu_callback,
+};
+
+static int __init microcode_init(void)
+{
+ struct cpuinfo_x86 *c = &cpu_data(0);
+ int error;
+
+ if (c->x86_vendor == X86_VENDOR_INTEL)
+ microcode_ops = init_intel_microcode();
+ else if (c->x86_vendor != X86_VENDOR_AMD)
+ microcode_ops = init_amd_microcode();
+
+ if (!microcode_ops) {
+ printk(KERN_ERR "microcode: no support for this CPU vendor\n");
+ return -ENODEV;
+ }
+
+ error = microcode_dev_init();
+ if (error)
+ return error;
+ microcode_pdev = platform_device_register_simple("microcode", -1,
+ NULL, 0);
+ if (IS_ERR(microcode_pdev)) {
+ microcode_dev_exit();
+ return PTR_ERR(microcode_pdev);
+ }
+
+ get_online_cpus();
+ error = sysdev_driver_register(&cpu_sysdev_class, &mc_sysdev_driver);
+ put_online_cpus();
+ if (error) {
+ microcode_dev_exit();
+ platform_device_unregister(microcode_pdev);
+ return error;
+ }
+
+ register_hotcpu_notifier(&mc_cpu_notifier);
+
+ printk(KERN_INFO
+ "Microcode Update Driver: v" MICROCODE_VERSION
+ " <tigran@aivazian.fsnet.co.uk>"
+ " <peter.oruba@amd.com>\n");
+
+ return 0;
+}
+
+static void __exit microcode_exit(void)
+{
+ microcode_dev_exit();
+
+ unregister_hotcpu_notifier(&mc_cpu_notifier);
+
+ get_online_cpus();
+ sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
+ put_online_cpus();
+
+ platform_device_unregister(microcode_pdev);
+
+ microcode_ops = NULL;
+
+ printk(KERN_INFO
+ "Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
+}
+
+module_init(microcode_init);
+module_exit(microcode_exit);
--- /dev/null
+/*
+ * Intel CPU Microcode Update Driver for Linux
+ *
+ * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
+ * 2006 Shaohua Li <shaohua.li@intel.com>
+ *
+ * This driver allows to upgrade microcode on Intel processors
+ * belonging to IA-32 family - PentiumPro, Pentium II,
+ * Pentium III, Xeon, Pentium 4, etc.
+ *
+ * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture
+ * Software Developer's Manual
+ * Order Number 253668 or free download from:
+ *
+ * http://developer.intel.com/design/pentium4/manuals/253668.htm
+ *
+ * For more information, go to http://www.urbanmyth.org/microcode
+ *
+ * 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.
+ *
+ * 1.0 16 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Initial release.
+ * 1.01 18 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Added read() support + cleanups.
+ * 1.02 21 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Added 'device trimming' support. open(O_WRONLY) zeroes
+ * and frees the saved copy of applied microcode.
+ * 1.03 29 Feb 2000, Tigran Aivazian <tigran@sco.com>
+ * Made to use devfs (/dev/cpu/microcode) + cleanups.
+ * 1.04 06 Jun 2000, Simon Trimmer <simon@veritas.com>
+ * Added misc device support (now uses both devfs and misc).
+ * Added MICROCODE_IOCFREE ioctl to clear memory.
+ * 1.05 09 Jun 2000, Simon Trimmer <simon@veritas.com>
+ * Messages for error cases (non Intel & no suitable microcode).
+ * 1.06 03 Aug 2000, Tigran Aivazian <tigran@veritas.com>
+ * Removed ->release(). Removed exclusive open and status bitmap.
+ * Added microcode_rwsem to serialize read()/write()/ioctl().
+ * Removed global kernel lock usage.
+ * 1.07 07 Sep 2000, Tigran Aivazian <tigran@veritas.com>
+ * Write 0 to 0x8B msr and then cpuid before reading revision,
+ * so that it works even if there were no update done by the
+ * BIOS. Otherwise, reading from 0x8B gives junk (which happened
+ * to be 0 on my machine which is why it worked even when I
+ * disabled update by the BIOS)
+ * Thanks to Eric W. Biederman <ebiederman@lnxi.com> for the fix.
+ * 1.08 11 Dec 2000, Richard Schaal <richard.schaal@intel.com> and
+ * Tigran Aivazian <tigran@veritas.com>
+ * Intel Pentium 4 processor support and bugfixes.
+ * 1.09 30 Oct 2001, Tigran Aivazian <tigran@veritas.com>
+ * Bugfix for HT (Hyper-Threading) enabled processors
+ * whereby processor resources are shared by all logical processors
+ * in a single CPU package.
+ * 1.10 28 Feb 2002 Asit K Mallick <asit.k.mallick@intel.com> and
+ * Tigran Aivazian <tigran@veritas.com>,
+ * Serialize updates as required on HT processors due to
+ * speculative nature of implementation.
+ * 1.11 22 Mar 2002 Tigran Aivazian <tigran@veritas.com>
+ * Fix the panic when writing zero-length microcode chunk.
+ * 1.12 29 Sep 2003 Nitin Kamble <nitin.a.kamble@intel.com>,
+ * Jun Nakajima <jun.nakajima@intel.com>
+ * Support for the microcode updates in the new format.
+ * 1.13 10 Oct 2003 Tigran Aivazian <tigran@veritas.com>
+ * Removed ->read() method and obsoleted MICROCODE_IOCFREE ioctl
+ * because we no longer hold a copy of applied microcode
+ * in kernel memory.
+ * 1.14 25 Jun 2004 Tigran Aivazian <tigran@veritas.com>
+ * Fix sigmatch() macro to handle old CPUs with pf == 0.
+ * Thanks to Stuart Swales for pointing out this bug.
+ */
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/cpumask.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/miscdevice.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/cpu.h>
+#include <linux/firmware.h>
+#include <linux/platform_device.h>
+
+#include <asm/msr.h>
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+#include <asm/microcode.h>
+
+MODULE_DESCRIPTION("Microcode Update Driver");
+MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
+MODULE_LICENSE("GPL");
+
+struct microcode_header_intel {
+ unsigned int hdrver;
+ unsigned int rev;
+ unsigned int date;
+ unsigned int sig;
+ unsigned int cksum;
+ unsigned int ldrver;
+ unsigned int pf;
+ unsigned int datasize;
+ unsigned int totalsize;
+ unsigned int reserved[3];
+};
+
+struct microcode_intel {
+ struct microcode_header_intel hdr;
+ unsigned int bits[0];
+};
+
+/* microcode format is extended from prescott processors */
+struct extended_signature {
+ unsigned int sig;
+ unsigned int pf;
+ unsigned int cksum;
+};
+
+struct extended_sigtable {
+ unsigned int count;
+ unsigned int cksum;
+ unsigned int reserved[3];
+ struct extended_signature sigs[0];
+};
+
+#define DEFAULT_UCODE_DATASIZE (2000)
+#define MC_HEADER_SIZE (sizeof(struct microcode_header_intel))
+#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
+#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable))
+#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature))
+#define DWSIZE (sizeof(u32))
+#define get_totalsize(mc) \
+ (((struct microcode_intel *)mc)->hdr.totalsize ? \
+ ((struct microcode_intel *)mc)->hdr.totalsize : \
+ DEFAULT_UCODE_TOTALSIZE)
+
+#define get_datasize(mc) \
+ (((struct microcode_intel *)mc)->hdr.datasize ? \
+ ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE)
+
+#define sigmatch(s1, s2, p1, p2) \
+ (((s1) == (s2)) && (((p1) & (p2)) || (((p1) == 0) && ((p2) == 0))))
+
+#define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
+
+/* serialize access to the physical write to MSR 0x79 */
+static DEFINE_SPINLOCK(microcode_update_lock);
+
+static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
+{
+ struct cpuinfo_x86 *c = &cpu_data(cpu_num);
+ unsigned int val[2];
+
+ memset(csig, 0, sizeof(*csig));
+
+ if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
+ cpu_has(c, X86_FEATURE_IA64)) {
+ printk(KERN_ERR "microcode: CPU%d not a capable Intel "
+ "processor\n", cpu_num);
+ return -1;
+ }
+
+ csig->sig = cpuid_eax(0x00000001);
+
+ if ((c->x86_model >= 5) || (c->x86 > 6)) {
+ /* get processor flags from MSR 0x17 */
+ rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
+ csig->pf = 1 << ((val[1] >> 18) & 7);
+ }
+
+ wrmsr(MSR_IA32_UCODE_REV, 0, 0);
+ /* see notes above for revision 1.07. Apparent chip bug */
+ sync_core();
+ /* get the current revision from MSR 0x8B */
+ rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev);
+ pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n",
+ csig->sig, csig->pf, csig->rev);
+
+ return 0;
+}
+
+static inline int update_match_cpu(struct cpu_signature *csig, int sig, int pf)
+{
+ return (!sigmatch(sig, csig->sig, pf, csig->pf)) ? 0 : 1;
+}
+
+static inline int
+update_match_revision(struct microcode_header_intel *mc_header, int rev)
+{
+ return (mc_header->rev <= rev) ? 0 : 1;
+}
+
+static int microcode_sanity_check(void *mc)
+{
+ struct microcode_header_intel *mc_header = mc;
+ struct extended_sigtable *ext_header = NULL;
+ struct extended_signature *ext_sig;
+ unsigned long total_size, data_size, ext_table_size;
+ int sum, orig_sum, ext_sigcount = 0, i;
+
+ total_size = get_totalsize(mc_header);
+ data_size = get_datasize(mc_header);
+ if (data_size + MC_HEADER_SIZE > total_size) {
+ printk(KERN_ERR "microcode: error! "
+ "Bad data size in microcode data file\n");
+ return -EINVAL;
+ }
+
+ if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
+ printk(KERN_ERR "microcode: error! "
+ "Unknown microcode update format\n");
+ return -EINVAL;
+ }
+ ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
+ if (ext_table_size) {
+ if ((ext_table_size < EXT_HEADER_SIZE)
+ || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
+ printk(KERN_ERR "microcode: error! "
+ "Small exttable size in microcode data file\n");
+ return -EINVAL;
+ }
+ ext_header = mc + MC_HEADER_SIZE + data_size;
+ if (ext_table_size != exttable_size(ext_header)) {
+ printk(KERN_ERR "microcode: error! "
+ "Bad exttable size in microcode data file\n");
+ return -EFAULT;
+ }
+ ext_sigcount = ext_header->count;
+ }
+
+ /* check extended table checksum */
+ if (ext_table_size) {
+ int ext_table_sum = 0;
+ int *ext_tablep = (int *)ext_header;
+
+ i = ext_table_size / DWSIZE;
+ while (i--)
+ ext_table_sum += ext_tablep[i];
+ if (ext_table_sum) {
+ printk(KERN_WARNING "microcode: aborting, "
+ "bad extended signature table checksum\n");
+ return -EINVAL;
+ }
+ }
+
+ /* calculate the checksum */
+ orig_sum = 0;
+ i = (MC_HEADER_SIZE + data_size) / DWSIZE;
+ while (i--)
+ orig_sum += ((int *)mc)[i];
+ if (orig_sum) {
+ printk(KERN_ERR "microcode: aborting, bad checksum\n");
+ return -EINVAL;
+ }
+ if (!ext_table_size)
+ return 0;
+ /* check extended signature checksum */
+ for (i = 0; i < ext_sigcount; i++) {
+ ext_sig = (void *)ext_header + EXT_HEADER_SIZE +
+ EXT_SIGNATURE_SIZE * i;
+ sum = orig_sum
+ - (mc_header->sig + mc_header->pf + mc_header->cksum)
+ + (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
+ if (sum) {
+ printk(KERN_ERR "microcode: aborting, bad checksum\n");
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+/*
+ * return 0 - no update found
+ * return 1 - found update
+ */
+static int
+get_matching_microcode(struct cpu_signature *cpu_sig, void *mc, int rev)
+{
+ struct microcode_header_intel *mc_header = mc;
+ struct extended_sigtable *ext_header;
+ unsigned long total_size = get_totalsize(mc_header);
+ int ext_sigcount, i;
+ struct extended_signature *ext_sig;
+
+ if (!update_match_revision(mc_header, rev))
+ return 0;
+
+ if (update_match_cpu(cpu_sig, mc_header->sig, mc_header->pf))
+ return 1;
+
+ /* Look for ext. headers: */
+ if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE)
+ return 0;
+
+ ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE;
+ ext_sigcount = ext_header->count;
+ ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
+
+ for (i = 0; i < ext_sigcount; i++) {
+ if (update_match_cpu(cpu_sig, ext_sig->sig, ext_sig->pf))
+ return 1;
+ ext_sig++;
+ }
+ return 0;
+}
+
+static void apply_microcode(int cpu)
+{
+ unsigned long flags;
+ unsigned int val[2];
+ int cpu_num = raw_smp_processor_id();
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ struct microcode_intel *mc_intel = uci->mc;
+
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu_num != cpu);
+
+ if (mc_intel == NULL)
+ return;
+
+ /* serialize access to the physical write to MSR 0x79 */
+ spin_lock_irqsave(µcode_update_lock, flags);
+
+ /* write microcode via MSR 0x79 */
+ wrmsr(MSR_IA32_UCODE_WRITE,
+ (unsigned long) mc_intel->bits,
+ (unsigned long) mc_intel->bits >> 16 >> 16);
+ wrmsr(MSR_IA32_UCODE_REV, 0, 0);
+
+ /* see notes above for revision 1.07. Apparent chip bug */
+ sync_core();
+
+ /* get the current revision from MSR 0x8B */
+ rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
+
+ spin_unlock_irqrestore(µcode_update_lock, flags);
+ if (val[1] != mc_intel->hdr.rev) {
+ printk(KERN_ERR "microcode: CPU%d update from revision "
+ "0x%x to 0x%x failed\n", cpu_num, uci->cpu_sig.rev, val[1]);
+ return;
+ }
+ printk(KERN_INFO "microcode: CPU%d updated from revision "
+ "0x%x to 0x%x, date = %04x-%02x-%02x \n",
+ cpu_num, uci->cpu_sig.rev, val[1],
+ mc_intel->hdr.date & 0xffff,
+ mc_intel->hdr.date >> 24,
+ (mc_intel->hdr.date >> 16) & 0xff);
+ uci->cpu_sig.rev = val[1];
+}
+
+static int generic_load_microcode(int cpu, void *data, size_t size,
+ int (*get_ucode_data)(void *, const void *, size_t))
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ u8 *ucode_ptr = data, *new_mc = NULL, *mc;
+ int new_rev = uci->cpu_sig.rev;
+ unsigned int leftover = size;
+
+ while (leftover) {
+ struct microcode_header_intel mc_header;
+ unsigned int mc_size;
+
+ if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header)))
+ break;
+
+ mc_size = get_totalsize(&mc_header);
+ if (!mc_size || mc_size > leftover) {
+ printk(KERN_ERR "microcode: error!"
+ "Bad data in microcode data file\n");
+ break;
+ }
+
+ mc = vmalloc(mc_size);
+ if (!mc)
+ break;
+
+ if (get_ucode_data(mc, ucode_ptr, mc_size) ||
+ microcode_sanity_check(mc) < 0) {
+ vfree(mc);
+ break;
+ }
+
+ if (get_matching_microcode(&uci->cpu_sig, mc, new_rev)) {
+ if (new_mc)
+ vfree(new_mc);
+ new_rev = mc_header.rev;
+ new_mc = mc;
+ } else
+ vfree(mc);
+
+ ucode_ptr += mc_size;
+ leftover -= mc_size;
+ }
+
+ if (new_mc) {
+ if (!leftover) {
+ if (uci->mc)
+ vfree(uci->mc);
+ uci->mc = (struct microcode_intel *)new_mc;
+ pr_debug("microcode: CPU%d found a matching microcode update with"
+ " version 0x%x (current=0x%x)\n",
+ cpu, new_rev, uci->cpu_sig.rev);
+ } else
+ vfree(new_mc);
+ }
+
+ return (int)leftover;
+}
+
+static int get_ucode_fw(void *to, const void *from, size_t n)
+{
+ memcpy(to, from, n);
+ return 0;
+}
+
+static int request_microcode_fw(int cpu, struct device *device)
+{
+ char name[30];
+ struct cpuinfo_x86 *c = &cpu_data(cpu);
+ const struct firmware *firmware;
+ int ret;
+
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu != raw_smp_processor_id());
+ sprintf(name, "intel-ucode/%02x-%02x-%02x",
+ c->x86, c->x86_model, c->x86_mask);
+ ret = request_firmware(&firmware, name, device);
+ if (ret) {
+ pr_debug("microcode: data file %s load failed\n", name);
+ return ret;
+ }
+
+ ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
+ &get_ucode_fw);
+
+ release_firmware(firmware);
+
+ return ret;
+}
+
+static int get_ucode_user(void *to, const void *from, size_t n)
+{
+ return copy_from_user(to, from, n);
+}
+
+static int request_microcode_user(int cpu, const void __user *buf, size_t size)
+{
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu != raw_smp_processor_id());
+
+ return generic_load_microcode(cpu, (void*)buf, size, &get_ucode_user);
+}
+
+static void microcode_fini_cpu(int cpu)
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+
+ vfree(uci->mc);
+ uci->mc = NULL;
+}
+
+struct microcode_ops microcode_intel_ops = {
+ .request_microcode_user = request_microcode_user,
+ .request_microcode_fw = request_microcode_fw,
+ .collect_cpu_info = collect_cpu_info,
+ .apply_microcode = apply_microcode,
+ .microcode_fini_cpu = microcode_fini_cpu,
+};
+
+struct microcode_ops * __init init_intel_microcode(void)
+{
+ return µcode_intel_ops;
+}
+
--- /dev/null
+#ifndef ASM_X86__MICROCODE_H
+#define ASM_X86__MICROCODE_H
+
+struct cpu_signature {
+ unsigned int sig;
+ unsigned int pf;
+ unsigned int rev;
+};
+
+struct device;
+
+struct microcode_ops {
+ int (*request_microcode_user) (int cpu, const void __user *buf, size_t size);
+ int (*request_microcode_fw) (int cpu, struct device *device);
+
+ void (*apply_microcode) (int cpu);
+
+ int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
+ void (*microcode_fini_cpu) (int cpu);
+};
+
+struct ucode_cpu_info {
+ struct cpu_signature cpu_sig;
+ int valid;
+ void *mc;
+};
+extern struct ucode_cpu_info ucode_cpu_info[];
+
+#ifdef CONFIG_MICROCODE_INTEL
+extern struct microcode_ops * __init init_intel_microcode(void);
+#else
+static inline struct microcode_ops * __init init_intel_microcode(void)
+{
+ return NULL;
+}
+#endif /* CONFIG_MICROCODE_INTEL */
+
+#ifdef CONFIG_MICROCODE_AMD
+extern struct microcode_ops * __init init_amd_microcode(void);
+#else
+static inline struct microcode_ops * __init init_amd_microcode(void)
+{
+ return NULL;
+}
+#endif
+
+#endif /* ASM_X86__MICROCODE_H */
write_cr4(cr4);
}
-struct microcode_header {
- unsigned int hdrver;
- unsigned int rev;
- unsigned int date;
- unsigned int sig;
- unsigned int cksum;
- unsigned int ldrver;
- unsigned int pf;
- unsigned int datasize;
- unsigned int totalsize;
- unsigned int reserved[3];
-};
-
-struct microcode {
- struct microcode_header hdr;
- unsigned int bits[0];
-};
-
-typedef struct microcode microcode_t;
-typedef struct microcode_header microcode_header_t;
-
-/* microcode format is extended from prescott processors */
-struct extended_signature {
- unsigned int sig;
- unsigned int pf;
- unsigned int cksum;
-};
-
-struct extended_sigtable {
- unsigned int count;
- unsigned int cksum;
- unsigned int reserved[3];
- struct extended_signature sigs[0];
-};
-
typedef struct {
unsigned long seg;
} mm_segment_t;
projects / linux-2.6-omap-h63xx.git / commitdiff