From: Josh Poimboeuf <jpoimboe@kernel.org>
Date: Tue, 5 Sep 2023 05:04:59 +0000 (-0700)
Subject: x86/srso: Move retbleed IBPB check into existing 'has_microcode' code block
X-Git-Tag: v6.6.17~2536
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b4166941c03dc0b8b958ff3f295ad6e67f967a3d;p=platform%2Fkernel%2Flinux-rpi.git

x86/srso: Move retbleed IBPB check into existing 'has_microcode' code block

commit 351236947a45a512c517153bbe109fe868d05e6d upstream.

Simplify the code flow a bit by moving the retbleed IBPB check into the
existing 'has_microcode' block.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/0a22b86b1f6b07f9046a9ab763fc0e0d1b7a91d4.1693889988.git.jpoimboe@kernel.org
Cc: Caleb Jorden <cjorden@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index a55a386..0bc5547 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -2422,10 +2422,8 @@ static void __init srso_select_mitigation(void)
 			setup_force_cpu_cap(X86_FEATURE_SRSO_NO);
 			return;
 		}
-	}
 
-	if (retbleed_mitigation == RETBLEED_MITIGATION_IBPB) {
-		if (has_microcode) {
+		if (retbleed_mitigation == RETBLEED_MITIGATION_IBPB) {
 			srso_mitigation = SRSO_MITIGATION_IBPB;
 			goto out;
 		}