[PATCH] x86 microcode: microcode driver cleanup.
Clean up microcode update driver and make it more readable. [akpm@osdl.org: cleanups] Signed-off-by: Shaohua Li <shaohua.li@intel.com> Acked-by: Tigran Aivazian <tigran@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Shaohua Li
Linus Torvalds
parent
36b756f2b5
commit
9a3110bf4b
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@ -416,6 +416,11 @@ config MICROCODE
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To compile this driver as a module, choose M here: the
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module will be called microcode.
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config MICROCODE_OLD_INTERFACE
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bool
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depends on MICROCODE
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default y
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config X86_MSR
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tristate "/dev/cpu/*/msr - Model-specific register support"
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help
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@ -2,6 +2,7 @@
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* Intel CPU Microcode Update Driver for Linux
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*
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* Copyright (C) 2000-2004 Tigran Aivazian
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* 2006 Shaohua Li <shaohua.li@intel.com>
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*
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* This driver allows to upgrade microcode on Intel processors
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* belonging to IA-32 family - PentiumPro, Pentium II,
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@ -91,9 +92,6 @@ MODULE_DESCRIPTION("Intel CPU (IA-32) Microcode Update Driver");
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MODULE_AUTHOR("Tigran Aivazian <tigran@veritas.com>");
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MODULE_LICENSE("GPL");
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static int verbose;
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module_param(verbose, int, 0644);
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#define MICROCODE_VERSION "1.14a"
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#define DEFAULT_UCODE_DATASIZE (2000) /* 2000 bytes */
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@ -120,55 +118,40 @@ static DEFINE_SPINLOCK(microcode_update_lock);
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/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
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static DEFINE_MUTEX(microcode_mutex);
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static void __user *user_buffer; /* user area microcode data buffer */
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static unsigned int user_buffer_size; /* it's size */
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typedef enum mc_error_code {
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MC_SUCCESS = 0,
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MC_IGNORED = 1,
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MC_NOTFOUND = 2,
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MC_MARKED = 3,
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MC_ALLOCATED = 4,
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} mc_error_code_t;
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static struct ucode_cpu_info {
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int valid;
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unsigned int sig;
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unsigned int pf, orig_pf;
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unsigned int pf;
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unsigned int rev;
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unsigned int cksum;
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mc_error_code_t err;
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microcode_t *mc;
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} ucode_cpu_info[NR_CPUS];
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static int microcode_open (struct inode *unused1, struct file *unused2)
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{
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return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
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}
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static void collect_cpu_info (void *unused)
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static void collect_cpu_info(int cpu_num)
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{
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int cpu_num = smp_processor_id();
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struct cpuinfo_x86 *c = cpu_data + cpu_num;
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
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unsigned int val[2];
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uci->sig = uci->pf = uci->rev = uci->cksum = 0;
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uci->err = MC_NOTFOUND;
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/* We should bind the task to the CPU */
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BUG_ON(raw_smp_processor_id() != cpu_num);
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uci->pf = uci->rev = 0;
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uci->mc = NULL;
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uci->valid = 1;
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if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
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cpu_has(c, X86_FEATURE_IA64)) {
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printk(KERN_ERR "microcode: CPU%d not a capable Intel processor\n", cpu_num);
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printk(KERN_ERR "microcode: CPU%d not a capable Intel "
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"processor\n", cpu_num);
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uci->valid = 0;
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return;
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} else {
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uci->sig = cpuid_eax(0x00000001);
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}
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if ((c->x86_model >= 5) || (c->x86 > 6)) {
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/* get processor flags from MSR 0x17 */
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rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
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uci->pf = 1 << ((val[1] >> 18) & 7);
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}
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uci->orig_pf = uci->pf;
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uci->sig = cpuid_eax(0x00000001);
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if ((c->x86_model >= 5) || (c->x86 > 6)) {
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/* get processor flags from MSR 0x17 */
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rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
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uci->pf = 1 << ((val[1] >> 18) & 7);
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}
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wrmsr(MSR_IA32_UCODE_REV, 0, 0);
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@ -180,218 +163,160 @@ static void collect_cpu_info (void *unused)
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uci->sig, uci->pf, uci->rev);
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}
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static inline void mark_microcode_update (int cpu_num, microcode_header_t *mc_header, int sig, int pf, int cksum)
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static inline int microcode_update_match(int cpu_num,
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microcode_header_t *mc_header, int sig, int pf)
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{
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
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pr_debug("Microcode Found.\n");
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pr_debug(" Header Revision 0x%x\n", mc_header->hdrver);
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pr_debug(" Loader Revision 0x%x\n", mc_header->ldrver);
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pr_debug(" Revision 0x%x \n", mc_header->rev);
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pr_debug(" Date %x/%x/%x\n",
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((mc_header->date >> 24 ) & 0xff),
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((mc_header->date >> 16 ) & 0xff),
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(mc_header->date & 0xFFFF));
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pr_debug(" Signature 0x%x\n", sig);
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pr_debug(" Type 0x%x Family 0x%x Model 0x%x Stepping 0x%x\n",
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((sig >> 12) & 0x3),
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((sig >> 8) & 0xf),
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((sig >> 4) & 0xf),
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((sig & 0xf)));
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pr_debug(" Processor Flags 0x%x\n", pf);
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pr_debug(" Checksum 0x%x\n", cksum);
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if (!sigmatch(sig, uci->sig, pf, uci->pf)
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|| mc_header->rev <= uci->rev)
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return 0;
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return 1;
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}
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if (mc_header->rev < uci->rev) {
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if (uci->err == MC_NOTFOUND) {
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uci->err = MC_IGNORED;
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uci->cksum = mc_header->rev;
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} else if (uci->err == MC_IGNORED && uci->cksum < mc_header->rev)
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uci->cksum = mc_header->rev;
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} else if (mc_header->rev == uci->rev) {
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if (uci->err < MC_MARKED) {
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/* notify the caller of success on this cpu */
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uci->err = MC_SUCCESS;
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static int microcode_sanity_check(void *mc)
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{
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microcode_header_t *mc_header = mc;
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struct extended_sigtable *ext_header = NULL;
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struct extended_signature *ext_sig;
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unsigned long total_size, data_size, ext_table_size;
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int sum, orig_sum, ext_sigcount = 0, i;
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total_size = get_totalsize(mc_header);
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data_size = get_datasize(mc_header);
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if ((data_size + MC_HEADER_SIZE > total_size)
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|| (data_size < DEFAULT_UCODE_DATASIZE)) {
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printk(KERN_ERR "microcode: error! "
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"Bad data size in microcode data file\n");
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return -EINVAL;
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}
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if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
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printk(KERN_ERR "microcode: error! "
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"Unknown microcode update format\n");
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return -EINVAL;
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}
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ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
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if (ext_table_size) {
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if ((ext_table_size < EXT_HEADER_SIZE)
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|| ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
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printk(KERN_ERR "microcode: error! "
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"Small exttable size in microcode data file\n");
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return -EINVAL;
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}
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} else if (uci->err != MC_ALLOCATED || mc_header->rev > uci->mc->hdr.rev) {
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pr_debug("microcode: CPU%d found a matching microcode update with "
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" revision 0x%x (current=0x%x)\n", cpu_num, mc_header->rev, uci->rev);
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uci->cksum = cksum;
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uci->pf = pf; /* keep the original mc pf for cksum calculation */
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uci->err = MC_MARKED; /* found the match */
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for_each_online_cpu(cpu_num) {
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if (ucode_cpu_info + cpu_num != uci
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&& ucode_cpu_info[cpu_num].mc == uci->mc) {
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uci->mc = NULL;
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break;
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}
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ext_header = mc + MC_HEADER_SIZE + data_size;
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if (ext_table_size != exttable_size(ext_header)) {
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printk(KERN_ERR "microcode: error! "
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"Bad exttable size in microcode data file\n");
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return -EFAULT;
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}
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if (uci->mc != NULL) {
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vfree(uci->mc);
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uci->mc = NULL;
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ext_sigcount = ext_header->count;
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}
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/* check extended table checksum */
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if (ext_table_size) {
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int ext_table_sum = 0;
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int * ext_tablep = (int *)ext_header;
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i = ext_table_size / DWSIZE;
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while (i--)
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ext_table_sum += ext_tablep[i];
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if (ext_table_sum) {
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printk(KERN_WARNING "microcode: aborting, "
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"bad extended signature table checksum\n");
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return -EINVAL;
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}
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}
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return;
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/* calculate the checksum */
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orig_sum = 0;
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i = (MC_HEADER_SIZE + data_size) / DWSIZE;
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while (i--)
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orig_sum += ((int *)mc)[i];
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if (orig_sum) {
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printk(KERN_ERR "microcode: aborting, bad checksum\n");
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return -EINVAL;
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}
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if (!ext_table_size)
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return 0;
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/* check extended signature checksum */
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for (i = 0; i < ext_sigcount; i++) {
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ext_sig = (struct extended_signature *)((void *)ext_header
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+ EXT_HEADER_SIZE + EXT_SIGNATURE_SIZE * i);
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sum = orig_sum
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- (mc_header->sig + mc_header->pf + mc_header->cksum)
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+ (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
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if (sum) {
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printk(KERN_ERR "microcode: aborting, bad checksum\n");
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return -EINVAL;
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}
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}
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return 0;
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}
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static int find_matching_ucodes (void)
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/*
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* return 0 - no update found
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* return 1 - found update
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* return < 0 - error
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*/
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static int get_maching_microcode(void *mc, int cpu)
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{
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int cursor = 0;
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int error = 0;
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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microcode_header_t *mc_header = mc;
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struct extended_sigtable *ext_header;
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unsigned long total_size = get_totalsize(mc_header);
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int ext_sigcount, i;
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struct extended_signature *ext_sig;
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void *new_mc;
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while (cursor + MC_HEADER_SIZE < user_buffer_size) {
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microcode_header_t mc_header;
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void *newmc = NULL;
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int i, sum, cpu_num, allocated_flag, total_size, data_size, ext_table_size;
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if (microcode_update_match(cpu, mc_header,
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mc_header->sig, mc_header->pf))
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goto find;
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if (copy_from_user(&mc_header, user_buffer + cursor, MC_HEADER_SIZE)) {
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printk(KERN_ERR "microcode: error! Can not read user data\n");
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error = -EFAULT;
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goto out;
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}
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if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE)
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return 0;
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total_size = get_totalsize(&mc_header);
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if ((cursor + total_size > user_buffer_size) || (total_size < DEFAULT_UCODE_TOTALSIZE)) {
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printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
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error = -EINVAL;
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goto out;
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}
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ext_header = (struct extended_sigtable *)(mc +
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get_datasize(mc_header) + MC_HEADER_SIZE);
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ext_sigcount = ext_header->count;
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ext_sig = (struct extended_signature *)((void *)ext_header
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+ EXT_HEADER_SIZE);
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for (i = 0; i < ext_sigcount; i++) {
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if (microcode_update_match(cpu, mc_header,
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ext_sig->sig, ext_sig->pf))
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goto find;
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ext_sig++;
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}
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return 0;
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find:
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pr_debug("microcode: CPU %d found a matching microcode update with"
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" version 0x%x (current=0x%x)\n", cpu, mc_header->rev,uci->rev);
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new_mc = vmalloc(total_size);
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if (!new_mc) {
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printk(KERN_ERR "microcode: error! Can not allocate memory\n");
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return -ENOMEM;
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}
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data_size = get_datasize(&mc_header);
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if ((data_size + MC_HEADER_SIZE > total_size) || (data_size < DEFAULT_UCODE_DATASIZE)) {
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printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
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error = -EINVAL;
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goto out;
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}
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/* free previous update file */
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vfree(uci->mc);
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if (mc_header.ldrver != 1 || mc_header.hdrver != 1) {
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printk(KERN_ERR "microcode: error! Unknown microcode update format\n");
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error = -EINVAL;
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goto out;
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}
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for_each_online_cpu(cpu_num) {
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
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if (sigmatch(mc_header.sig, uci->sig, mc_header.pf, uci->orig_pf))
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mark_microcode_update(cpu_num, &mc_header, mc_header.sig, mc_header.pf, mc_header.cksum);
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}
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ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
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if (ext_table_size) {
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struct extended_sigtable ext_header;
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struct extended_signature ext_sig;
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int ext_sigcount;
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if ((ext_table_size < EXT_HEADER_SIZE)
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|| ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
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printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
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error = -EINVAL;
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goto out;
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}
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if (copy_from_user(&ext_header, user_buffer + cursor
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+ MC_HEADER_SIZE + data_size, EXT_HEADER_SIZE)) {
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printk(KERN_ERR "microcode: error! Can not read user data\n");
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error = -EFAULT;
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goto out;
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}
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if (ext_table_size != exttable_size(&ext_header)) {
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printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
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error = -EFAULT;
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goto out;
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}
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ext_sigcount = ext_header.count;
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for (i = 0; i < ext_sigcount; i++) {
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if (copy_from_user(&ext_sig, user_buffer + cursor + MC_HEADER_SIZE + data_size + EXT_HEADER_SIZE
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+ EXT_SIGNATURE_SIZE * i, EXT_SIGNATURE_SIZE)) {
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printk(KERN_ERR "microcode: error! Can not read user data\n");
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error = -EFAULT;
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goto out;
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}
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for_each_online_cpu(cpu_num) {
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
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if (sigmatch(ext_sig.sig, uci->sig, ext_sig.pf, uci->orig_pf)) {
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mark_microcode_update(cpu_num, &mc_header, ext_sig.sig, ext_sig.pf, ext_sig.cksum);
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}
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}
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}
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}
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/* now check if any cpu has matched */
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allocated_flag = 0;
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sum = 0;
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for_each_online_cpu(cpu_num) {
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if (ucode_cpu_info[cpu_num].err == MC_MARKED) {
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
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if (!allocated_flag) {
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allocated_flag = 1;
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newmc = vmalloc(total_size);
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if (!newmc) {
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printk(KERN_ERR "microcode: error! Can not allocate memory\n");
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error = -ENOMEM;
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goto out;
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}
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if (copy_from_user(newmc + MC_HEADER_SIZE,
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user_buffer + cursor + MC_HEADER_SIZE,
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total_size - MC_HEADER_SIZE)) {
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printk(KERN_ERR "microcode: error! Can not read user data\n");
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vfree(newmc);
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error = -EFAULT;
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goto out;
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}
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memcpy(newmc, &mc_header, MC_HEADER_SIZE);
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/* check extended table checksum */
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if (ext_table_size) {
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int ext_table_sum = 0;
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int * ext_tablep = (((void *) newmc) + MC_HEADER_SIZE + data_size);
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i = ext_table_size / DWSIZE;
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while (i--) ext_table_sum += ext_tablep[i];
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if (ext_table_sum) {
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printk(KERN_WARNING "microcode: aborting, bad extended signature table checksum\n");
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vfree(newmc);
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error = -EINVAL;
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goto out;
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}
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}
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/* calculate the checksum */
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i = (MC_HEADER_SIZE + data_size) / DWSIZE;
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while (i--) sum += ((int *)newmc)[i];
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sum -= (mc_header.sig + mc_header.pf + mc_header.cksum);
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}
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ucode_cpu_info[cpu_num].mc = newmc;
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ucode_cpu_info[cpu_num].err = MC_ALLOCATED; /* mc updated */
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if (sum + uci->sig + uci->pf + uci->cksum != 0) {
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printk(KERN_ERR "microcode: CPU%d aborting, bad checksum\n", cpu_num);
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error = -EINVAL;
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goto out;
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}
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||||
}
|
||||
}
|
||||
cursor += total_size; /* goto the next update patch */
|
||||
} /* end of while */
|
||||
out:
|
||||
return error;
|
||||
memcpy(new_mc, mc, total_size);
|
||||
uci->mc = new_mc;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void do_update_one (void * unused)
|
||||
static void apply_microcode(int cpu)
|
||||
{
|
||||
unsigned long flags;
|
||||
unsigned int val[2];
|
||||
int cpu_num = smp_processor_id();
|
||||
int cpu_num = raw_smp_processor_id();
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
||||
|
||||
if (uci->mc == NULL) {
|
||||
if (verbose) {
|
||||
if (uci->err == MC_SUCCESS)
|
||||
printk(KERN_INFO "microcode: CPU%d already at revision 0x%x\n",
|
||||
cpu_num, uci->rev);
|
||||
else
|
||||
printk(KERN_INFO "microcode: No new microcode data for CPU%d\n", 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);
|
||||
|
|
@ -408,54 +333,98 @@ static void do_update_one (void * unused)
|
|||
/* 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 "
|
||||
if (val[1] != uci->mc->hdr.rev) {
|
||||
printk(KERN_ERR "microcode: CPU%d updated from revision "
|
||||
"0x%x to 0x%x failed\n", cpu_num, uci->rev, val[1]);
|
||||
return;
|
||||
}
|
||||
pr_debug("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;
|
||||
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)
|
||||
|| (total_size < DEFAULT_UCODE_TOTALSIZE)) {
|
||||
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)
|
||||
{
|
||||
int i, error;
|
||||
long cursor = 0;
|
||||
int error = 0;
|
||||
void * new_mc;
|
||||
int cpu;
|
||||
cpumask_t old;
|
||||
|
||||
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;
|
||||
}
|
||||
old = current->cpus_allowed;
|
||||
|
||||
if ((error = find_matching_ucodes())) {
|
||||
printk(KERN_ERR "microcode: Error in the microcode data\n");
|
||||
goto out_free;
|
||||
}
|
||||
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 (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;
|
||||
}
|
||||
if (!uci->valid)
|
||||
continue;
|
||||
set_cpus_allowed(current, cpumask_of_cpu(cpu));
|
||||
error = get_maching_microcode(new_mc, cpu);
|
||||
if (error < 0)
|
||||
goto out;
|
||||
if (error == 1)
|
||||
apply_microcode(cpu);
|
||||
}
|
||||
if (ucode_cpu_info[i].err == MC_IGNORED && verbose)
|
||||
printk(KERN_WARNING "microcode: CPU%d not 'upgrading' to earlier revision"
|
||||
" 0x%x (current=0x%x)\n", i, ucode_cpu_info[i].cksum, ucode_cpu_info[i].rev);
|
||||
vfree(new_mc);
|
||||
}
|
||||
out:
|
||||
if (cursor > 0)
|
||||
vfree(new_mc);
|
||||
if (cursor < 0)
|
||||
error = cursor;
|
||||
set_cpus_allowed(current, old);
|
||||
return error;
|
||||
}
|
||||
|
||||
static int microcode_open (struct inode *unused1, struct file *unused2)
|
||||
{
|
||||
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;
|
||||
|
|
@ -470,6 +439,7 @@ static ssize_t microcode_write (struct file *file, const char __user *buf, size_
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
lock_cpu_hotplug();
|
||||
mutex_lock(µcode_mutex);
|
||||
|
||||
user_buffer = (void __user *) buf;
|
||||
|
|
@ -480,6 +450,7 @@ static ssize_t microcode_write (struct file *file, const char __user *buf, size_
|
|||
ret = (ssize_t)len;
|
||||
|
||||
mutex_unlock(µcode_mutex);
|
||||
unlock_cpu_hotplug();
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -496,7 +467,7 @@ static struct miscdevice microcode_dev = {
|
|||
.fops = µcode_fops,
|
||||
};
|
||||
|
||||
static int __init microcode_init (void)
|
||||
static int __init microcode_dev_init (void)
|
||||
{
|
||||
int error;
|
||||
|
||||
|
|
@ -508,6 +479,28 @@ static int __init microcode_init (void)
|
|||
return error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit 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 int __init microcode_init (void)
|
||||
{
|
||||
int error;
|
||||
|
||||
error = microcode_dev_init();
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
printk(KERN_INFO
|
||||
"IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@veritas.com>\n");
|
||||
return 0;
|
||||
|
|
@ -515,9 +508,8 @@ static int __init microcode_init (void)
|
|||
|
||||
static void __exit microcode_exit (void)
|
||||
{
|
||||
misc_deregister(µcode_dev);
|
||||
microcode_dev_exit();
|
||||
}
|
||||
|
||||
module_init(microcode_init)
|
||||
module_exit(microcode_exit)
|
||||
MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
|
||||
|
|
|
|||
|
|
@ -186,6 +186,11 @@ config MICROCODE
|
|||
If you use modprobe or kmod you may also want to add the line
|
||||
'alias char-major-10-184 microcode' to your /etc/modules.conf file.
|
||||
|
||||
config MICROCODE_OLD_INTERFACE
|
||||
bool
|
||||
depends on MICROCODE
|
||||
default y
|
||||
|
||||
config X86_MSR
|
||||
tristate "/dev/cpu/*/msr - Model-specific register support"
|
||||
help
|
||||
|
|
|
|||
Reference in New Issue