From: David Woodhouse <dwmw2@infradead.org>
To: Andi Kleen <ak@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Kosina <jikos@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Rusty Russell <rusty@rustcorp.com.au>,
"Van De Ven, Arjan" <arjan.van.de.ven@intel.com>,
Jessica Yu <jeyu@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Revert "module: Add retpoline tag to VERMAGIC"
Date: Wed, 24 Jan 2018 19:31:22 +0000 [thread overview]
Message-ID: <1516822282.13558.176.camel@infradead.org> (raw)
In-Reply-To: <20180124181735.GB26209@tassilo.jf.intel.com>
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On Wed, 2018-01-24 at 10:17 -0800, Andi Kleen wrote:
> +/* A module has been loaded. Disable reporting that we're good. */
> +void disable_retpoline(void)
> +{
> + spectre_v2_enabled = SPECTRE_V2_NONE;
That wants to be one of the 'MINIMAL' variants.
> + pr_err("system may be vunerable to spectre\n");
> +}
> +
> +bool retpoline_enabled(void)
> +{
> + return spectre_v2_enabled != SPECTRE_V2_NONE;
How about checking for X86_FEATURE_RETPOLINE?
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next prev parent reply other threads:[~2018-01-24 19:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-24 14:28 [PATCH] Revert "module: Add retpoline tag to VERMAGIC" Greg Kroah-Hartman
2018-01-24 15:44 ` Andi Kleen
2018-01-24 17:00 ` Linus Torvalds
2018-01-24 18:17 ` Andi Kleen
2018-01-24 19:21 ` Randy Dunlap
2018-01-24 19:31 ` David Woodhouse [this message]
2018-01-25 8:43 ` Thomas Gleixner
2018-01-26 0:20 ` Jessica Yu
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