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From: Borislav Petkov <bp@alien8.de>
To: X86 ML <x86@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 4/4] x86/microcode: Remove unnecessary perf callback
Date: Wed, 25 May 2022 18:12:32 +0200	[thread overview]
Message-ID: <20220525161232.14924-5-bp@alien8.de> (raw)
In-Reply-To: <20220525161232.14924-1-bp@alien8.de>

From: Borislav Petkov <bp@suse.de>

c93dc84cbe32 ("perf/x86: Add a microcode revision check for SNB-PEBS")
checks whether the microcode revision has fixed PEBS issues.

This can happen either:

1. At PEBS init time, where the early microcode has been loaded already

2. During late loading, in the microcode_check() callback.

So remove the unnecessary call in the microcode loader init routine.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/cpu/microcode/core.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 801b44ac3851..ad57e0e4d674 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -756,10 +756,7 @@ static int __init microcode_init(void)
 
 	cpus_read_lock();
 	mutex_lock(&microcode_mutex);
-
 	error = subsys_interface_register(&mc_cpu_interface);
-	if (!error)
-		perf_check_microcode();
 	mutex_unlock(&microcode_mutex);
 	cpus_read_unlock();
 
-- 
2.35.1


  parent reply	other threads:[~2022-05-25 16:13 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-25 16:12 [PATCH 0/4] x86/microcode: Drop old interface and default-disable late loading Borislav Petkov
2022-05-25 16:12 ` [PATCH 1/4] x86/microcode: Rip out the OLD_INTERFACE Borislav Petkov
2022-05-31  7:34   ` [tip: x86/microcode] " tip-bot2 for Borislav Petkov
2022-05-25 16:12 ` [PATCH 2/4] x86/microcode: Default-disable late loading Borislav Petkov
2022-05-31  7:34   ` [tip: x86/microcode] " tip-bot2 for Borislav Petkov
2022-05-25 16:12 ` [PATCH 3/4] x86/microcode: Taint and warn on " Borislav Petkov
2022-05-31  7:34   ` [tip: x86/microcode] " tip-bot2 for Borislav Petkov
2022-05-25 16:12 ` Borislav Petkov [this message]
2022-05-31  7:34   ` [tip: x86/microcode] x86/microcode: Remove unnecessary perf callback tip-bot2 for Borislav Petkov

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