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Subject[PATCH] x86/microcode: Print previous version of microcode after reload
Date
It will be useful to print both old and new versions of microcode after a
reload is complete.

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
---
arch/x86/kernel/cpu/microcode/core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index ad57e0e4d674..6a41cee242f6 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -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;
}
--
2.32.0
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