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x86/microcode: Print previous version of microcode after reload

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[ Upstream commit 7fce8d6eccbc31a561d07c79f359ad09f0424347 ]

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: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20220829181030.722891-1-ashok.raj@intel.com
Stable-dep-of: c0dd9245aa9e ("x86/microcode: Check CPU capabilities after late microcode update correctly")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ashok Raj
2022-08-29 18:10:30 +00:00
committed by Greg Kroah-Hartman
parent e623080668
commit f5e78fa916
1 changed files with 3 additions and 2 deletions
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5
arch/x86/kernel/cpu/microcode/core.c
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@@ -508,7 +508,7 @@ wait_for_siblings:
*/
static int microcode_reload_late(void)
{
int ret;
int old = boot_cpu_data.microcode, ret;
atomic_set(&late_cpus_in, 0);
atomic_set(&late_cpus_out, 0);
@@ -517,7 +517,8 @@ 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;
}