From 5c9a92dec3235b0c1d51e92860f8014753161593 Mon Sep 17 00:00:00 2001 From: "Peter Zijlstra (Intel)" Date: Mon, 17 Oct 2022 16:41:20 +0200 Subject: [PATCH] x86/bugs: Add retbleed=force Debug aid, allows running retbleed=force,stuff on non-affected uarchs Signed-off-by: Peter Zijlstra (Intel) --- arch/x86/kernel/cpu/bugs.c | 2 ++ 1 file changed, 2 insertions(+) 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); } -- 2.39.5