5cf6c541f5
This driver loops over 'num_online_cpus', but it doesn't account for holes in the online map created by offlined cpus, and assumes that the cpu numbers stay linear. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
519 lines
16 KiB
C
519 lines
16 KiB
C
/*
|
|
* Intel CPU Microcode Update Driver for Linux
|
|
*
|
|
* Copyright (C) 2000-2004 Tigran Aivazian
|
|
*
|
|
* 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 8.10 of Volume III, Intel Pentium 4 Manual,
|
|
* Order Number 245472 or free download from:
|
|
*
|
|
* http://developer.intel.com/design/pentium4/manuals/245472.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/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 <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@veritas.com>");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define MICROCODE_VERSION "1.14"
|
|
|
|
#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 DECLARE_MUTEX(microcode_sem);
|
|
|
|
static void __user *user_buffer; /* user area microcode data buffer */
|
|
static unsigned int user_buffer_size; /* it's size */
|
|
|
|
typedef enum mc_error_code {
|
|
MC_SUCCESS = 0,
|
|
MC_NOTFOUND = 1,
|
|
MC_MARKED = 2,
|
|
MC_ALLOCATED = 3,
|
|
} mc_error_code_t;
|
|
|
|
static struct ucode_cpu_info {
|
|
unsigned int sig;
|
|
unsigned int pf;
|
|
unsigned int rev;
|
|
unsigned int cksum;
|
|
mc_error_code_t err;
|
|
microcode_t *mc;
|
|
} ucode_cpu_info[NR_CPUS];
|
|
|
|
static int microcode_open (struct inode *unused1, struct file *unused2)
|
|
{
|
|
return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
|
|
}
|
|
|
|
static void collect_cpu_info (void *unused)
|
|
{
|
|
int cpu_num = smp_processor_id();
|
|
struct cpuinfo_x86 *c = cpu_data + cpu_num;
|
|
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
|
unsigned int val[2];
|
|
|
|
uci->sig = uci->pf = uci->rev = uci->cksum = 0;
|
|
uci->err = MC_NOTFOUND;
|
|
uci->mc = NULL;
|
|
|
|
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;
|
|
} else {
|
|
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 void mark_microcode_update (int cpu_num, microcode_header_t *mc_header, int sig, int pf, int cksum)
|
|
{
|
|
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
|
|
|
pr_debug("Microcode Found.\n");
|
|
pr_debug(" Header Revision 0x%x\n", mc_header->hdrver);
|
|
pr_debug(" Loader Revision 0x%x\n", mc_header->ldrver);
|
|
pr_debug(" Revision 0x%x \n", mc_header->rev);
|
|
pr_debug(" Date %x/%x/%x\n",
|
|
((mc_header->date >> 24 ) & 0xff),
|
|
((mc_header->date >> 16 ) & 0xff),
|
|
(mc_header->date & 0xFFFF));
|
|
pr_debug(" Signature 0x%x\n", sig);
|
|
pr_debug(" Type 0x%x Family 0x%x Model 0x%x Stepping 0x%x\n",
|
|
((sig >> 12) & 0x3),
|
|
((sig >> 8) & 0xf),
|
|
((sig >> 4) & 0xf),
|
|
((sig & 0xf)));
|
|
pr_debug(" Processor Flags 0x%x\n", pf);
|
|
pr_debug(" Checksum 0x%x\n", cksum);
|
|
|
|
if (mc_header->rev < uci->rev) {
|
|
printk(KERN_ERR "microcode: CPU%d not 'upgrading' to earlier revision"
|
|
" 0x%x (current=0x%x)\n", cpu_num, mc_header->rev, uci->rev);
|
|
goto out;
|
|
} else if (mc_header->rev == uci->rev) {
|
|
/* notify the caller of success on this cpu */
|
|
uci->err = MC_SUCCESS;
|
|
printk(KERN_ERR "microcode: CPU%d already at revision"
|
|
" 0x%x (current=0x%x)\n", cpu_num, mc_header->rev, uci->rev);
|
|
goto out;
|
|
}
|
|
|
|
pr_debug("microcode: CPU%d found a matching microcode update with "
|
|
" revision 0x%x (current=0x%x)\n", cpu_num, mc_header->rev, uci->rev);
|
|
uci->cksum = cksum;
|
|
uci->pf = pf; /* keep the original mc pf for cksum calculation */
|
|
uci->err = MC_MARKED; /* found the match */
|
|
out:
|
|
return;
|
|
}
|
|
|
|
static int find_matching_ucodes (void)
|
|
{
|
|
int cursor = 0;
|
|
int error = 0;
|
|
|
|
while (cursor + MC_HEADER_SIZE < user_buffer_size) {
|
|
microcode_header_t mc_header;
|
|
void *newmc = NULL;
|
|
int i, sum, cpu_num, allocated_flag, total_size, data_size, ext_table_size;
|
|
|
|
if (copy_from_user(&mc_header, user_buffer + cursor, MC_HEADER_SIZE)) {
|
|
printk(KERN_ERR "microcode: error! Can not read user data\n");
|
|
error = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
total_size = get_totalsize(&mc_header);
|
|
if ((cursor + total_size > user_buffer_size) || (total_size < DEFAULT_UCODE_TOTALSIZE)) {
|
|
printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
data_size = get_datasize(&mc_header);
|
|
if ((data_size + MC_HEADER_SIZE > total_size) || (data_size < DEFAULT_UCODE_DATASIZE)) {
|
|
printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (mc_header.ldrver != 1 || mc_header.hdrver != 1) {
|
|
printk(KERN_ERR "microcode: error! Unknown microcode update format\n");
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
for_each_online_cpu(cpu_num) {
|
|
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
|
if (uci->err != MC_NOTFOUND) /* already found a match or not an online cpu*/
|
|
continue;
|
|
|
|
if (sigmatch(mc_header.sig, uci->sig, mc_header.pf, uci->pf))
|
|
mark_microcode_update(cpu_num, &mc_header, mc_header.sig, mc_header.pf, mc_header.cksum);
|
|
}
|
|
|
|
ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
|
|
if (ext_table_size) {
|
|
struct extended_sigtable ext_header;
|
|
struct extended_signature ext_sig;
|
|
int ext_sigcount;
|
|
|
|
if ((ext_table_size < EXT_HEADER_SIZE)
|
|
|| ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
|
|
printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (copy_from_user(&ext_header, user_buffer + cursor
|
|
+ MC_HEADER_SIZE + data_size, EXT_HEADER_SIZE)) {
|
|
printk(KERN_ERR "microcode: error! Can not read user data\n");
|
|
error = -EFAULT;
|
|
goto out;
|
|
}
|
|
if (ext_table_size != exttable_size(&ext_header)) {
|
|
printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
|
|
error = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
ext_sigcount = ext_header.count;
|
|
|
|
for (i = 0; i < ext_sigcount; i++) {
|
|
if (copy_from_user(&ext_sig, user_buffer + cursor + MC_HEADER_SIZE + data_size + EXT_HEADER_SIZE
|
|
+ EXT_SIGNATURE_SIZE * i, EXT_SIGNATURE_SIZE)) {
|
|
printk(KERN_ERR "microcode: error! Can not read user data\n");
|
|
error = -EFAULT;
|
|
goto out;
|
|
}
|
|
for_each_online_cpu(cpu_num) {
|
|
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
|
if (uci->err != MC_NOTFOUND) /* already found a match or not an online cpu*/
|
|
continue;
|
|
if (sigmatch(ext_sig.sig, uci->sig, ext_sig.pf, uci->pf)) {
|
|
mark_microcode_update(cpu_num, &mc_header, ext_sig.sig, ext_sig.pf, ext_sig.cksum);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* now check if any cpu has matched */
|
|
allocated_flag = 0;
|
|
sum = 0;
|
|
for_each_online_cpu(cpu_num) {
|
|
if (ucode_cpu_info[cpu_num].err == MC_MARKED) {
|
|
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
|
if (!allocated_flag) {
|
|
allocated_flag = 1;
|
|
newmc = vmalloc(total_size);
|
|
if (!newmc) {
|
|
printk(KERN_ERR "microcode: error! Can not allocate memory\n");
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
if (copy_from_user(newmc + MC_HEADER_SIZE,
|
|
user_buffer + cursor + MC_HEADER_SIZE,
|
|
total_size - MC_HEADER_SIZE)) {
|
|
printk(KERN_ERR "microcode: error! Can not read user data\n");
|
|
vfree(newmc);
|
|
error = -EFAULT;
|
|
goto out;
|
|
}
|
|
memcpy(newmc, &mc_header, MC_HEADER_SIZE);
|
|
/* check extended table checksum */
|
|
if (ext_table_size) {
|
|
int ext_table_sum = 0;
|
|
int * ext_tablep = (((void *) newmc) + MC_HEADER_SIZE + data_size);
|
|
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");
|
|
vfree(newmc);
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* calculate the checksum */
|
|
i = (MC_HEADER_SIZE + data_size) / DWSIZE;
|
|
while (i--) sum += ((int *)newmc)[i];
|
|
sum -= (mc_header.sig + mc_header.pf + mc_header.cksum);
|
|
}
|
|
ucode_cpu_info[cpu_num].mc = newmc;
|
|
ucode_cpu_info[cpu_num].err = MC_ALLOCATED; /* mc updated */
|
|
if (sum + uci->sig + uci->pf + uci->cksum != 0) {
|
|
printk(KERN_ERR "microcode: CPU%d aborting, bad checksum\n", cpu_num);
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
cursor += total_size; /* goto the next update patch */
|
|
} /* end of while */
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
static void do_update_one (void * unused)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int val[2];
|
|
int cpu_num = smp_processor_id();
|
|
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
|
|
|
if (uci->mc == NULL) {
|
|
printk(KERN_INFO "microcode: No new microcode data for CPU%d\n", cpu_num);
|
|
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]);
|
|
|
|
/* notify the caller of success on this cpu */
|
|
uci->err = MC_SUCCESS;
|
|
spin_unlock_irqrestore(µcode_update_lock, flags);
|
|
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);
|
|
return;
|
|
}
|
|
|
|
static int do_microcode_update (void)
|
|
{
|
|
int i, error;
|
|
|
|
if (on_each_cpu(collect_cpu_info, NULL, 1, 1) != 0) {
|
|
printk(KERN_ERR "microcode: Error! Could not run on all processors\n");
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
if ((error = find_matching_ucodes())) {
|
|
printk(KERN_ERR "microcode: Error in the microcode data\n");
|
|
goto out_free;
|
|
}
|
|
|
|
if (on_each_cpu(do_update_one, NULL, 1, 1) != 0) {
|
|
printk(KERN_ERR "microcode: Error! Could not run on all processors\n");
|
|
error = -EIO;
|
|
}
|
|
|
|
out_free:
|
|
for_each_online_cpu(i) {
|
|
if (ucode_cpu_info[i].mc) {
|
|
int j;
|
|
void *tmp = ucode_cpu_info[i].mc;
|
|
vfree(tmp);
|
|
for_each_online_cpu(j) {
|
|
if (ucode_cpu_info[j].mc == tmp)
|
|
ucode_cpu_info[j].mc = NULL;
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
static ssize_t microcode_write (struct file *file, const char __user *buf, size_t len, loff_t *ppos)
|
|
{
|
|
ssize_t ret;
|
|
|
|
if (len < DEFAULT_UCODE_TOTALSIZE) {
|
|
printk(KERN_ERR "microcode: not enough data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((len >> PAGE_SHIFT) > num_physpages) {
|
|
printk(KERN_ERR "microcode: too much data (max %ld pages)\n", num_physpages);
|
|
return -EINVAL;
|
|
}
|
|
|
|
down(µcode_sem);
|
|
|
|
user_buffer = (void __user *) buf;
|
|
user_buffer_size = (int) len;
|
|
|
|
ret = do_microcode_update();
|
|
if (!ret)
|
|
ret = (ssize_t)len;
|
|
|
|
up(µcode_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int microcode_ioctl (struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
/*
|
|
* XXX: will be removed after microcode_ctl
|
|
* is updated to ignore failure of this ioctl()
|
|
*/
|
|
case MICROCODE_IOCFREE:
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static struct file_operations microcode_fops = {
|
|
.owner = THIS_MODULE,
|
|
.write = microcode_write,
|
|
.ioctl = microcode_ioctl,
|
|
.open = microcode_open,
|
|
};
|
|
|
|
static struct miscdevice microcode_dev = {
|
|
.minor = MICROCODE_MINOR,
|
|
.name = "microcode",
|
|
.devfs_name = "cpu/microcode",
|
|
.fops = µcode_fops,
|
|
};
|
|
|
|
static int __init microcode_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;
|
|
}
|
|
|
|
printk(KERN_INFO
|
|
"IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@veritas.com>\n");
|
|
return 0;
|
|
}
|
|
|
|
static void __exit microcode_exit (void)
|
|
{
|
|
misc_deregister(µcode_dev);
|
|
printk(KERN_INFO "IA-32 Microcode Update Driver v" MICROCODE_VERSION " unregistered\n");
|
|
}
|
|
|
|
module_init(microcode_init)
|
|
module_exit(microcode_exit)
|
|
MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
|