From: Brendan Jackman <jackmanb@google.com>
To: Brendan Jackman <jackmanb@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Balbir Singh <sblbir@amazon.com>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <aesa@google.com>
Subject: Re: [PATCH] Documentation/x86: Fix PR_SET_SPECULATION_CTRL error codes
Date: Thu, 30 Oct 2025 15:49:40 +0000 [thread overview]
Message-ID: <DDVRXPUAWTK6.2658AGIB03073@google.com> (raw)
In-Reply-To: <20251030-b4-prctl-docs-2-v1-1-396645cb8d61@google.com>
On Thu Oct 30, 2025 at 1:59 PM UTC, Brendan Jackman wrote:
> -ENXIO Control of the selected speculation misfeature is not possible.
> - See PR_GET_SPECULATION_CTRL.
> +ENXIO For PR_SPEC_STORE_BYPASS: control of the selected speculation misfeature
> + is not possible via prctl, because of the system's boot configuration.
> +
> +EPERM Speculation was disabled with PR_SPEC_FORCE_DISABLE and caller tried to
> + enable it again.
> +
> +EPERM For PR_SPEC_STORE_BYPASS and PR_SPEC_INDIRECT_BRANCH: control of the
Ugh, ^^^^^^^^^^^^^^^^^^^^ that should be PR_SPEC_L1D_FLUSH
I will wait a day or two before v2 in case anyone else spots other
mistakes or has other comments.
prev parent reply other threads:[~2025-10-30 15:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-30 13:59 [PATCH] Documentation/x86: Fix PR_SET_SPECULATION_CTRL error codes Brendan Jackman
2025-10-30 15:49 ` Brendan Jackman [this message]
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