Messages in this thread | | | Date | Mon, 9 Jan 2023 11:28:19 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86/retbleed: add "stuff" mode admin documentation |
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* Randy Dunlap <rdunlap@infradead.org> wrote:
> Add admin documentation for "retbleed=stuff", based on commit > description and source code. > > Fixes: d82a0345cf21 ("x86/retbleed: Add call depth tracking mitigation") > Signed-off-by: Randy Dunlap <rdunlap@infradead.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Borislav Petkov <bp@alien8.de> > Cc: Ingo Molnar <mingo@redhat.com> > Cc: Dave Hansen <dave.hansen@linux.intel.com> > Cc: x86@kernel.org > Cc: Jonathan Corbet <corbet@lwn.net> > Cc: linux-doc@vger.kernel.org > --- > Documentation/admin-guide/kernel-parameters.txt | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff -- a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -5364,6 +5364,14 @@ > when STIBP is not available. This is > the alternative for systems which do not > have STIBP. > + stuff - Enables "stuffing" mode mitigation, > + which uses return thunking and call depth > + tracking. Only if effect if > + CONFIG_CALL_DEPTH_TRACKING is set and > + Spectre V2 mitigation mode is > + "retpoline". > + IBRS is fully secure mitigation but is > + more costly (slower) than stuffing.
Typo:
s/only if effect if /only in effect if
Other than that:
Acked-by: Ingo Molnar <mingo@kernel.org>
Thanks,
Ingo
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