Commit 7fce8d6e authored by Ashok Raj's avatar Ashok Raj Committed by Borislav Petkov
Browse files

x86/microcode: Print previous version of microcode after reload 



Print both old and new versions of microcode after a reload is complete
because knowing the previous microcode version is sometimes important
from a debugging perspective.

  [ bp: Massage commit message. ]

Signed-off-by: default avatarAshok Raj <ashok.raj@intel.com>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Acked-by: default avatarTony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20220829181030.722891-1-ashok.raj@intel.com
parent 8c61eafd

arch/x86/kernel/cpu/microcode/core.c

+3 −2
Original line number Diff line number Diff line
@@ -491,7 +491,7 @@ static int __reload_late(void *info) 
 */

static int microcode_reload_late(void)

{

	int ret;

	int old = boot_cpu_data.microcode, ret;



	pr_err("Attempting late microcode loading - it is dangerous and taints the kernel.\n");

	pr_err("You should switch to early loading, if possible.\n");
@@ -503,7 +503,8 @@ static int microcode_reload_late(void) 
	if (ret == 0)

		microcode_check();



	pr_info("Reload completed, microcode revision: 0x%x\n", boot_cpu_data.microcode);

	pr_info("Reload completed, microcode revision: 0x%x -> 0x%x\n",

		old, boot_cpu_data.microcode);



	return ret;

}