x86: major refactoring
Refactored code by introducing a two-module solution.
There is one general module in which vendor specific modules can hook into.
However, that is exclusive, there is only one vendor specific module
allowed at a time. A CPU vendor check makes sure only the correct
module for the underlying system gets called.
Functinally in terms of patch loading itself there are no changes. This
refactoring provides a basis for future implementations of other vendors'
patch loaders.
Signed-off-by: Peter Oruba <peter.oruba@amd.com>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c
index c1047d7..1e42e79 100644
--- a/arch/x86/kernel/microcode.c
+++ b/arch/x86/kernel/microcode.c
@@ -99,25 +99,22 @@
MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
MODULE_LICENSE("GPL");
-#define MICROCODE_VERSION "1.14a"
+#define MICROCODE_VERSION "2.00"
+
+struct microcode_ops *microcode_ops;
/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
-DEFINE_MUTEX(microcode_mutex);
+static DEFINE_MUTEX(microcode_mutex);
+EXPORT_SYMBOL_GPL(microcode_mutex);
-struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
-
-extern long get_next_ucode(void **mc, long offset);
-extern int microcode_sanity_check(void *mc);
-extern int get_matching_microcode(void *mc, int cpu);
-extern void collect_cpu_info(int cpu_num);
-extern int cpu_request_microcode(int cpu);
-extern void microcode_fini_cpu(int cpu);
-extern void apply_microcode(int cpu);
-extern int apply_microcode_check_cpu(int cpu);
+static struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
+EXPORT_SYMBOL_GPL(ucode_cpu_info);
#ifdef CONFIG_MICROCODE_OLD_INTERFACE
-void __user *user_buffer; /* user area microcode data buffer */
-unsigned int user_buffer_size; /* it's size */
+static void __user *user_buffer; /* user area microcode data buffer */
+EXPORT_SYMBOL_GPL(user_buffer);
+static unsigned int user_buffer_size; /* it's size */
+EXPORT_SYMBOL_GPL(user_buffer_size);
static int do_microcode_update (void)
{
@@ -130,8 +127,8 @@
old = current->cpus_allowed;
- while ((cursor = get_next_ucode(&new_mc, cursor)) > 0) {
- error = microcode_sanity_check(new_mc);
+ while ((cursor = microcode_ops->get_next_ucode(&new_mc, cursor)) > 0) {
+ error = microcode_ops->microcode_sanity_check(new_mc);
if (error)
goto out;
/*
@@ -145,11 +142,12 @@
continue;
cpumask_of_cpu_ptr_next(newmask, cpu);
set_cpus_allowed_ptr(current, newmask);
- error = get_maching_microcode(new_mc, cpu);
+ error = microcode_ops->get_matching_microcode(new_mc,
+ cpu);
if (error < 0)
goto out;
if (error == 1)
- apply_microcode(cpu);
+ microcode_ops->apply_microcode(cpu);
}
vfree(new_mc);
}
@@ -232,7 +230,8 @@
#endif
/* fake device for request_firmware */
-struct platform_device *microcode_pdev;
+static struct platform_device *microcode_pdev;
+EXPORT_SYMBOL_GPL(microcode_pdev);
static void microcode_init_cpu(int cpu, int resume)
{
@@ -244,9 +243,9 @@
set_cpus_allowed_ptr(current, newmask);
mutex_lock(µcode_mutex);
- collect_cpu_info(cpu);
+ microcode_ops->collect_cpu_info(cpu);
if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
- cpu_request_microcode(cpu);
+ microcode_ops->cpu_request_microcode(cpu);
mutex_unlock(µcode_mutex);
set_cpus_allowed_ptr(current, &old);
}
@@ -274,7 +273,7 @@
mutex_lock(µcode_mutex);
if (uci->valid)
- err = cpu_request_microcode(cpu);
+ err = microcode_ops->cpu_request_microcode(cpu);
mutex_unlock(µcode_mutex);
put_online_cpus();
set_cpus_allowed_ptr(current, &old);
@@ -349,7 +348,7 @@
return 0;
pr_debug("microcode: CPU%d removed\n", cpu);
- microcode_fini_cpu(cpu);
+ microcode_ops->microcode_fini_cpu(cpu);
sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
return 0;
}
@@ -362,7 +361,7 @@
return 0;
pr_debug("microcode: CPU%d resumed\n", cpu);
/* only CPU 0 will apply ucode here */
- apply_microcode(0);
+ microcode_ops->apply_microcode(0);
return 0;
}
@@ -382,7 +381,7 @@
switch (action) {
case CPU_UP_CANCELED_FROZEN:
/* The CPU refused to come up during a system resume */
- microcode_fini_cpu(cpu);
+ microcode_ops->microcode_fini_cpu(cpu);
break;
case CPU_ONLINE:
case CPU_DOWN_FAILED:
@@ -390,9 +389,9 @@
break;
case CPU_ONLINE_FROZEN:
/* System-wide resume is in progress, try to apply microcode */
- if (apply_microcode_check_cpu(cpu)) {
+ if (microcode_ops->apply_microcode_check_cpu(cpu)) {
/* The application of microcode failed */
- microcode_fini_cpu(cpu);
+ microcode_ops->microcode_fini_cpu(cpu);
__mc_sysdev_add(sys_dev, 1);
break;
}
@@ -416,12 +415,17 @@
.notifier_call = mc_cpu_callback,
};
-static int __init microcode_init (void)
+static int microcode_init(void *opaque, struct module *module)
{
+ struct microcode_ops *ops = (struct microcode_ops *)opaque;
int error;
- printk(KERN_INFO
- "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
+ if (microcode_ops) {
+ printk(KERN_ERR "microcode: already loaded the other module\n");
+ return -EEXIST;
+ }
+
+ microcode_ops = ops;
error = microcode_dev_init();
if (error)
@@ -443,8 +447,15 @@
}
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;
}
+EXPORT_SYMBOL_GPL(microcode_init);
static void __exit microcode_exit (void)
{
@@ -457,7 +468,10 @@
put_online_cpus();
platform_device_unregister(microcode_pdev);
-}
-module_init(microcode_init)
-module_exit(microcode_exit)
+ microcode_ops = NULL;
+
+ printk(KERN_INFO
+ "Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
+}
+EXPORT_SYMBOL_GPL(microcode_exit);