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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>
pull/520/merge
Peter Zijlstra (Intel) 2022-10-17 16:41:20 +02:00 committed by Peter Zijlstra
parent d82a0345cf
commit 5c9a92dec3
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/cpu/bugs.c
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@ -838,6 +838,8 @@ static int __init retbleed_parse_cmdline(char *str)
retbleed_cmd = RETBLEED_CMD_STUFF; retbleed_cmd = RETBLEED_CMD_STUFF;
} else if (!strcmp(str, "nosmt")) { } else if (!strcmp(str, "nosmt")) {
retbleed_nosmt = true; retbleed_nosmt = true;
} else if (!strcmp(str, "force")) {
setup_force_cpu_bug(X86_BUG_RETBLEED);
} else { } else {
pr_err("Ignoring unknown retbleed option (%s).", str); pr_err("Ignoring unknown retbleed option (%s).", str);
} }