x86/microcode: Issue update message only once

This is especially annoying on large boxes:

  x86: Booting SMP configuration:
  .... node  #0, CPUs:          #1
  microcode: CPU1 microcode updated early to revision 0x428, date = 2014-05-29
     #2
  microcode: CPU2 microcode updated early to revision 0x428, date = 2014-05-29
     #3
  ...

so issue the update message only once.

$ grep microcode /proc/cpuinfo

shows whether every core got updated properly.

Reported-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Thomas Voegtle <tv@lio96.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1454499225-21544-6-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 2233f8a..5b63e2f 100644 (file)
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -432,8 +432,8 @@ int __init save_microcode_in_initrd_amd(void)
                container = cont_va;
 
        if (ucode_new_rev)
-               pr_info("microcode: updated early to new patch_level=0x%08x\n",
-                       ucode_new_rev);
+               pr_info_once("microcode updated early to new patch_level=0x%08x\n",
+                            ucode_new_rev);
 
        eax   = cpuid_eax(0x00000001);
        eax   = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff);

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 4f4735b..f4bc5fe 100644 (file)
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -571,14 +571,11 @@ scan_microcode(struct mc_saved_data *mc_saved_data, unsigned long *initrd,
 static void
 print_ucode_info(struct ucode_cpu_info *uci, unsigned int date)
 {
-       int cpu = smp_processor_id();
-
-       pr_info("CPU%d microcode updated early to revision 0x%x, date = %04x-%02x-%02x\n",
-               cpu,
-               uci->cpu_sig.rev,
-               date & 0xffff,
-               date >> 24,
-               (date >> 16) & 0xff);
+       pr_info_once("microcode updated early to revision 0x%x, date = %04x-%02x-%02x\n",
+                    uci->cpu_sig.rev,
+                    date & 0xffff,
+                    date >> 24,
+                    (date >> 16) & 0xff);
 }
 
 #ifdef CONFIG_X86_32