From: Dave Hansen <dave.hansen@intel.com>
To: Randy Dunlap <rdunlap@infradead.org>, linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, Jonathan Corbet <corbet@lwn.net>,
linux-doc@vger.kernel.org, Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v2] x86/retbleed: add "stuff" mode admin documentation
Date: Mon, 9 Jan 2023 09:19:09 -0800 [thread overview]
Message-ID: <ceec97e2-2acd-6f15-5675-6b2b143b972f@intel.com> (raw)
In-Reply-To: <20230109160808.30740-1-rdunlap@infradead.org>
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).
next prev parent reply other threads:[~2023-01-09 17:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 16:08 Randy Dunlap
2023-01-09 17:19 ` Dave Hansen [this message]
2023-01-09 21:08 ` Randy Dunlap
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