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SubjectRe: [PATCH v2] x86/retbleed: add "stuff" mode admin documentation
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On 1/9/23 08:08, Randy Dunlap wrote:
> + stuff - Enables "stuffing" mode mitigation,
> + which uses return thunking and call depth
> + tracking. Only in 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.

The "fully secure" thing makes me cringe a bit.

I'd suggest saying:

IBRS is a stronger mitigation
but is more costly than stuffing
(slower).


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