joy/android_kernel_sony_sdm845
Watch
1
Fork
You've already forked android_kernel_sony_sdm845
 0
Code Issues Pull requests Projects Releases Wiki Activity

x86/microcode/intel: Save microcode patch unconditionally

Browse source 
commit 84749d83758af6576552046b215b9b7f37f9556b upstream.

save_mc_for_early() was a no-op on !CONFIG_HOTPLUG_CPU but the
generic_load_microcode() path saves the microcode patches it has found into
the cache of patches which is used for late loading too. Regardless of
whether CPU hotplug is used or not.

Make the saving unconditional so that late loading can find the proper
patch.

Reported-by: Vitezslav Samel <vitezslav@samel.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vitezslav Samel <vitezslav@samel.cz>
Tested-by: Ashok Raj <ashok.raj@intel.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20180418081140.GA2439@pc11.op.pod.cz
Link: https://lkml.kernel.org/r/20180421081930.15741-1-bp@alien8.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Borislav Petkov 2018-04-21 10:19:29 +02:00 • committed by Greg Kroah-Hartman
commit c11a6ed509
1 changed files with 0 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
arch/x86/kernel/cpu/microcode/intel.c
View file

@ -474,7 +474,6 @@ static void show_saved_mc(void)
*/
static void save_mc_for_early(u8 *mc)
{
#ifdef CONFIG_HOTPLUG_CPU
/* Synchronization during CPU hotplug. */
static DEFINE_MUTEX(x86_cpu_microcode_mutex);
@ -521,7 +520,6 @@ static void save_mc_for_early(u8 *mc)
out:
mutex_unlock(&x86_cpu_microcode_mutex);
#endif
}
static bool __init load_builtin_intel_microcode(struct cpio_data *cp)