x86: microcode: cleanup
Impact: cleanup
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Cc: Peter Oruba <peter.oruba@amd.com>
LKML-Reference: <200903111632.37279.rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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/capability.h>
-#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>
-#include <linux/vmalloc.h>
-#include <linux/miscdevice.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/mutex.h>
-#include <linux/cpu.h>
-#include <linux/firmware.h>
#include <linux/platform_device.h>
+#include <linux/capability.h>
+#include <linux/miscdevice.h>
+#include <linux/firmware.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/cpumask.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/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@aivazian.fsnet.co.uk>");
@@ -129,12 +129,13 @@
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_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 @@
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 @@
spin_unlock_irqrestore(µcode_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 @@
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;
}