Merge branch 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak...

[pandora-kernel.git] / arch / x86 / kernel / microcode.c

diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c
index 649dfd7..6994c75 100644 (file)
--- a/arch/x86/kernel/microcode.c
+++ b/arch/x86/kernel/microcode.c
@@ -5,13 +5,14 @@
  *                   2006      Shaohua Li <shaohua.li@intel.com>
  *
  *     This driver allows to upgrade microcode on Intel processors
- *     belonging to IA-32 family - PentiumPro, Pentium II, 
+ *     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
+ *     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
  *
@@ -58,12 +59,12 @@
  *             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>, 
+ *     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 
+ *             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.
@@ -75,6 +76,7 @@
 #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>
@@ -320,11 +322,11 @@ static void apply_microcode(int cpu)
                return;
 
        /* serialize access to the physical write to MSR 0x79 */
-       spin_lock_irqsave(&microcode_update_lock, flags);          
+       spin_lock_irqsave(&microcode_update_lock, flags);
 
        /* write microcode via MSR 0x79 */
        wrmsr(MSR_IA32_UCODE_WRITE,
-               (unsigned long) uci->mc->bits, 
+               (unsigned long) uci->mc->bits,
                (unsigned long) uci->mc->bits >> 16 >> 16);
        wrmsr(MSR_IA32_UCODE_REV, 0, 0);
 
@@ -341,7 +343,7 @@ static void apply_microcode(int cpu)
                return;
        }
        printk(KERN_INFO "microcode: CPU%d updated from revision "
-              "0x%x to 0x%x, date = %08x \n", 
+              "0x%x to 0x%x, date = %08x \n",
               cpu_num, uci->rev, val[1], uci->mc->hdr.date);
        uci->rev = val[1];
 }
@@ -386,6 +388,7 @@ static int do_microcode_update (void)
        void *new_mc = NULL;
        int cpu;
        cpumask_t old;
+       cpumask_of_cpu_ptr_declare(newmask);
 
        old = current->cpus_allowed;
 
@@ -402,7 +405,8 @@ static int do_microcode_update (void)
 
                        if (!uci->valid)
                                continue;
-                       set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
+                       cpumask_of_cpu_ptr_next(newmask, cpu);
+                       set_cpus_allowed_ptr(current, newmask);
                        error = get_maching_microcode(new_mc, cpu);
                        if (error < 0)
                                goto out;
@@ -422,6 +426,7 @@ out:
 
 static int microcode_open (struct inode *unused1, struct file *unused2)
 {
+       cycle_kernel_lock();
        return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
 }
 
@@ -534,7 +539,7 @@ static int cpu_request_microcode(int cpu)
                c->x86, c->x86_model, c->x86_mask);
        error = request_firmware(&firmware, name, &microcode_pdev->dev);
        if (error) {
-               pr_debug("microcode: ucode data file %s load failed\n", name);
+               pr_debug("microcode: data file %s load failed\n", name);
                return error;
        }
        buf = firmware->data;
@@ -571,6 +576,7 @@ 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;
+       cpumask_of_cpu_ptr(newmask, cpu);
        unsigned int val[2];
        int err = 0;
 
@@ -579,7 +585,7 @@ static int apply_microcode_check_cpu(int cpu)
                return 0;
 
        old = current->cpus_allowed;
-       set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
+       set_cpus_allowed_ptr(current, newmask);
 
        /* Check if the microcode we have in memory matches the CPU */
        if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
@@ -617,11 +623,12 @@ static int apply_microcode_check_cpu(int cpu)
 static void microcode_init_cpu(int cpu, int resume)
 {
        cpumask_t old;
+       cpumask_of_cpu_ptr(newmask, cpu);
        struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
 
        old = current->cpus_allowed;
 
-       set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
+       set_cpus_allowed_ptr(current, newmask);
        mutex_lock(&microcode_mutex);
        collect_cpu_info(cpu);
        if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
@@ -641,7 +648,9 @@ static void microcode_fini_cpu(int cpu)
        mutex_unlock(&microcode_mutex);
 }
 
-static ssize_t reload_store(struct sys_device *dev, const char *buf, size_t sz)
+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;
@@ -653,11 +662,12 @@ static ssize_t reload_store(struct sys_device *dev, const char *buf, size_t sz)
                return -EINVAL;
        if (val == 1) {
                cpumask_t old;
+               cpumask_of_cpu_ptr(newmask, cpu);
 
                old = current->cpus_allowed;
 
                get_online_cpus();
-               set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
+               set_cpus_allowed_ptr(current, newmask);
 
                mutex_lock(&microcode_mutex);
                if (uci->valid)
@@ -671,14 +681,16 @@ static ssize_t reload_store(struct sys_device *dev, const char *buf, size_t sz)
        return sz;
 }
 
-static ssize_t version_show(struct sys_device *dev, char *buf)
+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, char *buf)
+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;
 
@@ -805,6 +817,9 @@ 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;
@@ -825,9 +840,6 @@ static int __init microcode_init (void)
        }
 
        register_hotcpu_notifier(&mc_cpu_notifier);
-
-       printk(KERN_INFO 
-               "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
        return 0;
 }