50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
From bdaca71f1e3ffeea24c2a02d4eb21879d4dece96 Mon Sep 17 00:00:00 2001
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From: Ashok Raj <ashok.raj@intel.com>
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Date: Mon, 29 Aug 2022 18:10:30 +0000
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Subject: [PATCH 08/36] x86/microcode: Print previous version of microcode
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after reload
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Print both old and new versions of microcode after a reload is complete
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because knowing the previous microcode version is sometimes important
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from a debugging perspective.
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[ bp: Massage commit message. ]
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Signed-off-by: Ashok Raj <ashok.raj@intel.com>
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Signed-off-by: Borislav Petkov <bp@suse.de>
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Acked-by: Tony Luck <tony.luck@intel.com>
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Link: https://lore.kernel.org/r/20220829181030.722891-1-ashok.raj@intel.com
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(cherry picked from commit 7fce8d6eccbc31a561d07c79f359ad09f0424347)
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Signed-off-by: Mridula Shastry <mridula.c.shastry@oracle.com>
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Reviewed-by: Todd Vierling <todd.vierling@oracle.com>
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---
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arch/x86/kernel/cpu/microcode/core.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
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index 44bac17304ac..6affa814699d 100644
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--- a/arch/x86/kernel/cpu/microcode/core.c
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+++ b/arch/x86/kernel/cpu/microcode/core.c
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@@ -511,7 +511,7 @@ wait_for_siblings:
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*/
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static int microcode_reload_late(void)
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{
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- int ret;
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+ int old = boot_cpu_data.microcode, ret;
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pr_err("Attempting late microcode loading - it is dangerous and taints the kernel.\n");
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pr_err("You should switch to early loading, if possible.\n");
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@@ -523,7 +523,8 @@ static int microcode_reload_late(void)
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if (ret > 0)
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microcode_check();
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- pr_info("Reload completed, microcode revision: 0x%x\n", boot_cpu_data.microcode);
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+ pr_info("Reload completed, microcode revision: 0x%x -> 0x%x\n",
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+ old, boot_cpu_data.microcode);
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return ret;
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}
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--
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2.39.3
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