/*
* Intel CPU Microcode Update Driver for Linux
*
- * Copyright (C) 2000-2004 Tigran Aivazian
+ * 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
#include <asm/processor.h>
MODULE_DESCRIPTION("Intel CPU (IA-32) Microcode Update Driver");
-MODULE_AUTHOR("Tigran Aivazian <tigran@veritas.com>");
+MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
MODULE_LICENSE("GPL");
#define MICROCODE_VERSION "1.14a"
total_size = get_totalsize(mc_header);
data_size = get_datasize(mc_header);
- if ((data_size + MC_HEADER_SIZE > total_size)
- || (data_size < DEFAULT_UCODE_DATASIZE)) {
+ if (data_size + MC_HEADER_SIZE > total_size) {
printk(KERN_ERR "microcode: error! "
"Bad data size in microcode data file\n");
return -EINVAL;
/* check extended table checksum */
if (ext_table_size) {
int ext_table_sum = 0;
- int * ext_tablep = (int *)ext_header;
+ int *ext_tablep = (int *)ext_header;
i = ext_table_size / DWSIZE;
while (i--)
return -EFAULT;
}
total_size = get_totalsize(&mc_header);
- if ((offset + total_size > user_buffer_size)
- || (total_size < DEFAULT_UCODE_TOTALSIZE)) {
+ if (offset + total_size > user_buffer_size) {
printk(KERN_ERR "microcode: error! Bad total size in microcode "
"data file\n");
return -EINVAL;
{
long cursor = 0;
int error = 0;
- void * new_mc;
+ void *new_mc;
int cpu;
cpumask_t old;
{
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;
mc_header = (microcode_header_t *)(buf + offset);
total_size = get_totalsize(mc_header);
- if ((offset + total_size > size)
- || (total_size < DEFAULT_UCODE_TOTALSIZE)) {
+ if (offset + total_size > size) {
printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
return -EINVAL;
}
char name[30];
struct cpuinfo_x86 *c = cpu_data + cpu;
const struct firmware *firmware;
- void * buf;
+ void *buf;
unsigned long size;
long offset = 0;
int error;
set_cpus_allowed(current, cpumask_of_cpu(cpu));
mutex_lock(µcode_mutex);
collect_cpu_info(cpu);
- if (uci->valid)
+ if (uci->valid && system_state == SYSTEM_RUNNING)
cpu_request_microcode(cpu);
mutex_unlock(µcode_mutex);
set_cpus_allowed(current, old);
mutex_unlock(µcode_mutex);
}
+static ssize_t reload_store(struct sys_device *dev, 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;
+
+ old = current->cpus_allowed;
+
+ lock_cpu_hotplug();
+ set_cpus_allowed(current, cpumask_of_cpu(cpu));
+
+ mutex_lock(µcode_mutex);
+ if (uci->valid)
+ err = cpu_request_microcode(cpu);
+ mutex_unlock(µcode_mutex);
+ unlock_cpu_hotplug();
+ set_cpus_allowed(current, old);
+ }
+ if (err)
+ return err;
+ return sz;
+}
+
+static ssize_t version_show(struct sys_device *dev, 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)
+{
+ 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 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;
+ 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_ONLINE:
+ case CPU_DOWN_FAILED:
+ mc_sysdev_add(sys_dev);
+ break;
+ case CPU_DOWN_PREPARE:
+ mc_sysdev_remove(sys_dev);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block __cpuinitdata mc_cpu_notifier = {
+ .notifier_call = mc_cpu_callback,
+};
+
static int __init microcode_init (void)
{
int error;
return PTR_ERR(microcode_pdev);
}
+ lock_cpu_hotplug();
+ error = sysdev_driver_register(&cpu_sysdev_class, &mc_sysdev_driver);
+ unlock_cpu_hotplug();
+ if (error) {
+ microcode_dev_exit();
+ platform_device_unregister(microcode_pdev);
+ return error;
+ }
+
+ register_hotcpu_notifier(&mc_cpu_notifier);
+
printk(KERN_INFO
- "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@veritas.com>\n");
+ "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
return 0;
}
static void __exit microcode_exit (void)
{
microcode_dev_exit();
+
+ unregister_hotcpu_notifier(&mc_cpu_notifier);
+
+ lock_cpu_hotplug();
+ sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
+ unlock_cpu_hotplug();
+
platform_device_unregister(microcode_pdev);
}
git.openpandora.org / pandora-kernel.git / blobdiff