linux-kernel - Re: [PATCH v3 15/35] x86/bugs: Restructure spectre

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250211010743.75kzltegyvhdwkuw@jpoimboe>
Date: Mon, 10 Feb 2025 17:07:43 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: David Kaplan <david.kaplan@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H . Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 15/35] x86/bugs: Restructure spectre_v2 mitigation

On Wed, Jan 08, 2025 at 02:24:55PM -0600, David Kaplan wrote:
> +static void __init spectre_v2_update_mitigation(void)
> +{
> +	if (spectre_v2_cmd == SPECTRE_V2_CMD_AUTO) {
> +		if (IS_ENABLED(CONFIG_MITIGATION_IBRS_ENTRY) &&
> +		    boot_cpu_has_bug(X86_BUG_RETBLEED) &&
> +		    retbleed_mitigation != RETBLEED_MITIGATION_NONE &&
> +		    retbleed_mitigation != RETBLEED_MITIGATION_STUFF &&
> +		    boot_cpu_has(X86_FEATURE_IBRS) &&
> +		    boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) {
> +			spectre_v2_enabled = SPECTRE_V2_IBRS;
> +		}
> +	}

This has a dependency on retbleed_update_mitigation() which hasn't run
yet?

-- 
Josh