[tip:cpus4096] x86: microcode: cleanup

From: Ingo Molnar
Date: Wed Mar 18 2009 - 08:59:47 EST

Commit-ID: 4bae1967357bfc78a2fad1be5e81a4b868980ae6
Gitweb: http://git.kernel.org/tip/4bae1967357bfc78a2fad1be5e81a4b868980ae6
Author: Ingo Molnar <mingo@xxxxxxx>
AuthorDate: Wed, 11 Mar 2009 11:19:46 +0100
Commit: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Wed, 18 Mar 2009 13:51:17 +0100

x86: microcode: cleanup

Impact: cleanup

Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Dmitry Adamushko <dmitry.adamushko@xxxxxxxxx>
Cc: Peter Oruba <peter.oruba@xxxxxxx>
LKML-Reference: <200903111632.37279.rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
arch/x86/kernel/microcode_amd.c | 43 +++++++++----------
arch/x86/kernel/microcode_core.c | 58 +++++++++++++-------------
arch/x86/kernel/microcode_intel.c | 83 +++++++++++++++++++++---------------
3 files changed, 97 insertions(+), 87 deletions(-)

diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index c25fdb3..453b579 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -12,31 +12,30 @@
*
* Licensed under the terms of the GNU General Public
* License version 2. See file COPYING for details.
-*/
-
+ */
+#include <linux/platform_device.h>
#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/firmware.h>
#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
+#include <linux/cpumask.h>
+#include <linux/pci_ids.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/cpu.h>
-#include <linux/firmware.h>
-#include <linux/platform_device.h>
#include <linux/pci.h>
-#include <linux/pci_ids.h>
-#include <linux/uaccess.h>
+#include <linux/fs.h>
+#include <linux/mm.h>

-#include <asm/msr.h>
-#include <asm/processor.h>
#include <asm/microcode.h>
+#include <asm/processor.h>
+#include <asm/msr.h>

MODULE_DESCRIPTION("AMD Microcode Update Driver");
MODULE_AUTHOR("Peter Oruba");
@@ -72,8 +71,8 @@ struct microcode_header_amd {
} __attribute__((packed));

struct microcode_amd {
- struct microcode_header_amd hdr;
- unsigned int mpb[0];
+ struct microcode_header_amd hdr;
+ unsigned int mpb[0];
};

#define UCODE_MAX_SIZE 2048
@@ -184,8 +183,8 @@ static int get_ucode_data(void *to, const u8 *from, size_t n)
return 0;
}

-static void *get_next_ucode(const u8 *buf, unsigned int size,
- unsigned int *mc_size)
+static void *
+get_next_ucode(const u8 *buf, unsigned int size, unsigned int *mc_size)
{
unsigned int total_size;
u8 section_hdr[UCODE_CONTAINER_SECTION_HDR];
@@ -223,7 +222,6 @@ static void *get_next_ucode(const u8 *buf, unsigned int size,
return mc;
}

-
static int install_equiv_cpu_table(const u8 *buf)
{
u8 *container_hdr[UCODE_CONTAINER_HEADER_SIZE];
@@ -372,4 +370,3 @@ struct microcode_ops * __init init_amd_microcode(void)
{
return &microcode_amd_ops;
}
-
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 9a8dbc0..a0f3851 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -70,47 +70,47 @@
* Fix sigmatch() macro to handle old CPUs with pf == 0.
* Thanks to Stuart Swales for pointing out this bug.
*/
+#include <linux/platform_device.h>
#include <linux/capability.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
+#include <linux/miscdevice.h>
+#include <linux/firmware.h>
#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
#include <linux/cpumask.h>
-#include <linux/module.h>
-#include <linux/slab.h>
+#include <linux/uaccess.h>
#include <linux/vmalloc.h>
-#include <linux/miscdevice.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/cpu.h>
-#include <linux/firmware.h>
-#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/mm.h>

-#include <asm/msr.h>
-#include <asm/uaccess.h>
-#include <asm/processor.h>
#include <asm/microcode.h>
+#include <asm/processor.h>
+#include <asm/msr.h>

MODULE_DESCRIPTION("Microcode Update Driver");
MODULE_AUTHOR("Tigran Aivazian <tigran@xxxxxxxxxxxxxxxxxxxx>");
MODULE_LICENSE("GPL");

-#define MICROCODE_VERSION "2.00"
+#define MICROCODE_VERSION "2.00"

-static struct microcode_ops *microcode_ops;
+static struct microcode_ops *microcode_ops;

/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
static DEFINE_MUTEX(microcode_mutex);

-struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
+struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
EXPORT_SYMBOL_GPL(ucode_cpu_info);

#ifdef CONFIG_MICROCODE_OLD_INTERFACE
struct update_for_cpu {
- const void __user *buf;
- size_t size;
+ const void __user *buf;
+ size_t size;
};

static long update_for_cpu(void *_ufc)
@@ -209,12 +209,12 @@ static void microcode_dev_exit(void)

MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
#else
-#define microcode_dev_init() 0
-#define microcode_dev_exit() do { } while (0)
+#define microcode_dev_init() 0
+#define microcode_dev_exit() do { } while (0)
#endif

/* fake device for request_firmware */
-static struct platform_device *microcode_pdev;
+static struct platform_device *microcode_pdev;

static long reload_for_cpu(void *unused)
{
@@ -282,8 +282,8 @@ static struct attribute *mc_default_attrs[] = {
};

static struct attribute_group mc_attr_group = {
- .attrs = mc_default_attrs,
- .name = "microcode",
+ .attrs = mc_default_attrs,
+ .name = "microcode",
};

static void __microcode_fini_cpu(int cpu)
@@ -353,7 +353,7 @@ static long microcode_update_cpu(void *unused)
*/
if (uci->valid) {
err = microcode_resume_cpu(smp_processor_id());
- } else {
+ } else {
collect_cpu_info(smp_processor_id());
if (uci->valid && system_state == SYSTEM_RUNNING)
err = microcode_ops->request_microcode_fw(
@@ -423,9 +423,9 @@ static int mc_sysdev_resume(struct sys_device *dev)
}

static struct sysdev_driver mc_sysdev_driver = {
- .add = mc_sysdev_add,
- .remove = mc_sysdev_remove,
- .resume = mc_sysdev_resume,
+ .add = mc_sysdev_add,
+ .remove = mc_sysdev_remove,
+ .resume = mc_sysdev_resume,
};

static __cpuinit int
@@ -464,7 +464,7 @@ mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
}

static struct notifier_block __refdata mc_cpu_notifier = {
- .notifier_call = mc_cpu_callback,
+ .notifier_call = mc_cpu_callback,
};

static int __init microcode_init(void)
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index 5e9f4fc..149b9ec 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -70,28 +70,28 @@
* Fix sigmatch() macro to handle old CPUs with pf == 0.
* Thanks to Stuart Swales for pointing out this bug.
*/
+#include <linux/platform_device.h>
#include <linux/capability.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
+#include <linux/miscdevice.h>
+#include <linux/firmware.h>
#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
#include <linux/cpumask.h>
-#include <linux/module.h>
-#include <linux/slab.h>
+#include <linux/uaccess.h>
#include <linux/vmalloc.h>
-#include <linux/miscdevice.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/cpu.h>
-#include <linux/firmware.h>
-#include <linux/platform_device.h>
-#include <linux/uaccess.h>
+#include <linux/fs.h>
+#include <linux/mm.h>

-#include <asm/msr.h>
-#include <asm/processor.h>
#include <asm/microcode.h>
+#include <asm/processor.h>
+#include <asm/msr.h>

MODULE_DESCRIPTION("Microcode Update Driver");
MODULE_AUTHOR("Tigran Aivazian <tigran@xxxxxxxxxxxxxxxxxxxx>");
@@ -129,12 +129,13 @@ struct extended_sigtable {
struct extended_signature sigs[0];
};

-#define DEFAULT_UCODE_DATASIZE (2000)
+#define DEFAULT_UCODE_DATASIZE (2000)
#define MC_HEADER_SIZE (sizeof(struct microcode_header_intel))
#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable))
#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature))
#define DWSIZE (sizeof(u32))
+
#define get_totalsize(mc) \
(((struct microcode_intel *)mc)->hdr.totalsize ? \
((struct microcode_intel *)mc)->hdr.totalsize : \
@@ -197,30 +198,31 @@ static inline int update_match_cpu(struct cpu_signature *csig, int sig, int pf)
}

static inline int
-update_match_revision(struct microcode_header_intel *mc_header, int rev)
+update_match_revision(struct microcode_header_intel *mc_header, int rev)
{
return (mc_header->rev <= rev) ? 0 : 1;
}

static int microcode_sanity_check(void *mc)
{
+ unsigned long total_size, data_size, ext_table_size;
struct microcode_header_intel *mc_header = mc;
struct extended_sigtable *ext_header = NULL;
- struct extended_signature *ext_sig;
- unsigned long total_size, data_size, ext_table_size;
int sum, orig_sum, ext_sigcount = 0, i;
+ struct extended_signature *ext_sig;

total_size = get_totalsize(mc_header);
data_size = get_datasize(mc_header);
+
if (data_size + MC_HEADER_SIZE > total_size) {
printk(KERN_ERR "microcode: error! "
- "Bad data size in microcode data file\n");
+ "Bad data size in microcode data file\n");
return -EINVAL;
}

if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
printk(KERN_ERR "microcode: error! "
- "Unknown microcode update format\n");
+ "Unknown microcode update format\n");
return -EINVAL;
}
ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
@@ -318,11 +320,15 @@ get_matching_microcode(struct cpu_signature *cpu_sig, void *mc, int rev)

static void apply_microcode(int cpu)
{
+ struct microcode_intel *mc_intel;
+ struct ucode_cpu_info *uci;
unsigned long flags;
unsigned int val[2];
- int cpu_num = raw_smp_processor_id();
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- struct microcode_intel *mc_intel = uci->mc;
+ int cpu_num;
+
+ cpu_num = raw_smp_processor_id();
+ uci = ucode_cpu_info + cpu;
+ mc_intel = uci->mc;

/* We should bind the task to the CPU */
BUG_ON(cpu_num != cpu);
@@ -348,15 +354,17 @@ static void apply_microcode(int cpu)
spin_unlock_irqrestore(&microcode_update_lock, flags);
if (val[1] != mc_intel->hdr.rev) {
printk(KERN_ERR "microcode: CPU%d update from revision "
- "0x%x to 0x%x failed\n", cpu_num, uci->cpu_sig.rev, val[1]);
+ "0x%x to 0x%x failed\n",
+ cpu_num, uci->cpu_sig.rev, val[1]);
return;
}
printk(KERN_INFO "microcode: CPU%d updated from revision "
- "0x%x to 0x%x, date = %04x-%02x-%02x \n",
+ "0x%x to 0x%x, date = %04x-%02x-%02x \n",
cpu_num, uci->cpu_sig.rev, val[1],
mc_intel->hdr.date & 0xffff,
mc_intel->hdr.date >> 24,
(mc_intel->hdr.date >> 16) & 0xff);
+
uci->cpu_sig.rev = val[1];
}

@@ -404,18 +412,23 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
leftover -= mc_size;
}

- if (new_mc) {
- if (!leftover) {
- if (uci->mc)
- vfree(uci->mc);
- uci->mc = (struct microcode_intel *)new_mc;
- pr_debug("microcode: CPU%d found a matching microcode update with"
- " version 0x%x (current=0x%x)\n",
- cpu, new_rev, uci->cpu_sig.rev);
- } else
- vfree(new_mc);
+ if (!new_mc)
+ goto out;
+
+ if (leftover) {
+ vfree(new_mc);
+ goto out;
}

+ if (uci->mc)
+ vfree(uci->mc);
+ uci->mc = (struct microcode_intel *)new_mc;
+
+ pr_debug("microcode: CPU%d found a matching microcode update with"
+ " version 0x%x (current=0x%x)\n",
+ cpu, new_rev, uci->cpu_sig.rev);
+
+ out:
return (int)leftover;
}

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