From: Peter Zijlstra (Intel) <peterz@infradead.org>
Date: Mon, 17 Oct 2022 14:41:20 +0000 (+0200)
Subject: x86/bugs: Add retbleed=force
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5c9a92dec3235b0c1d51e92860f8014753161593;p=linux.git

x86/bugs: Add retbleed=force

Debug aid, allows running retbleed=force,stuff on non-affected uarchs

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index e6c23ead16170..b307b83e22bef 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -838,6 +838,8 @@ static int __init retbleed_parse_cmdline(char *str)
 			retbleed_cmd = RETBLEED_CMD_STUFF;
 		} else if (!strcmp(str, "nosmt")) {
 			retbleed_nosmt = true;
+		} else if (!strcmp(str, "force")) {
+			setup_force_cpu_bug(X86_BUG_RETBLEED);
 		} else {
 			pr_err("Ignoring unknown retbleed option (%s).", str);
 		}