linux-kernel - Re: [PATCH] x86/bugs: Restructure ITS mitigation

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20250515211159.njyxgxuxmyhqx46m@desk>
Date: Thu, 15 May 2025 14:11:59 -0700
From: Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
To: David Kaplan <david.kaplan@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	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] x86/bugs: Restructure ITS mitigation

On Thu, May 15, 2025 at 08:47:56AM -0500, David Kaplan wrote:
...
> +static void __init its_apply_mitigation(void)
> +{
> +	/* its=stuff forces retbleed stuffing and is enabled there. */
> +	if (its_mitigation != ITS_MITIGATION_ALIGNED_THUNKS)
> +		return;
> +
> +	if (!boot_cpu_has(X86_FEATURE_RETPOLINE))
> +		setup_force_cpu_cap(X86_FEATURE_INDIRECT_THUNK_ITS);
> +
> +	setup_force_cpu_cap(X86_FEATURE_RETHUNK);
> +	set_return_thunk(its_return_thunk);
> +}
> +
>  #undef pr_fmt
>  #define pr_fmt(fmt)     "Spectre V2 : " fmt
>  
> 
> base-commit: 04bdd560124ec4d02d1d11ee3abc88d51954d7b8

I am having trouble applying this patch to upstream and tip/master. I can't
seem to find this base-commit in Linus's or tip tree. Please let me know
what am I missing?