From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D33AA3770B for ; Mon, 6 Oct 2025 14:05:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=65.109.113.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759759507; cv=none; b=I2/FVHdpNwtFBnU96rzxze4ApYhobrWk6t4fG8EbXasQuDnA15Hlmjsv0ZIGO2kIwytKAu17/UB/g+JM3nHT4LcF+XLas6x2B/SspQYMeplXjsp6dgOWXHxtRNd9mKIDwmVvyXRRXrB4ZEnglXPqhHkfaeKEyi1lJtXNMt6eDUg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759759507; c=relaxed/simple; bh=i716bZB2jFOR9HAlMh2NO5FwyUYT/QsD8Kmp6pPTzig=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Aan+zlC5aeeM8P21MesLJc/DlwcMbNhG9MVYKYImftYqpp+/bbbusmrL6UT4/s51Fy1G7Ed05+XynY85Z5nRlxtWLKdmI6thB/N7Qq3ksWTPPP5twwUYGVk36KeSwZ2hv5PeDwnydQ0hV95hU5aKOiKxy9mrjL/tyPLeKz5aeyY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de; spf=pass smtp.mailfrom=alien8.de; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b=Y5BUz/Cu; arc=none smtp.client-ip=65.109.113.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alien8.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b="Y5BUz/Cu" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 6CF8B40E0196; Mon, 6 Oct 2025 14:05:03 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Authentication-Results: mail.alien8.de (amavisd-new); dkim=pass (4096-bit key) header.d=alien8.de Received: from mail.alien8.de ([127.0.0.1]) by localhost (mail.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id mxoPHDFv_C_G; Mon, 6 Oct 2025 14:05:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1759759500; bh=7XTZZ2lgqEkjBqbmTJ9XvScwjjMvvl0+kRTdGHql5xI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Y5BUz/CukPxXVlQmq+p/mMa9PSjjspM2fpSkiGVy0r+8qTOG6bp/VrqeC2hj0X42j BQaZaHlC4uynZ7wgEEnOOPCo9kWP7Zdvf2aFaobFAQwM4SVyeHOBjvFNqZR1x3CCs6 Qm1pxSXFEMLuYYuL7JpAFiwd1pvfKJZ5awN4LmUpQzZdZt2qErdL5tM3k9xYCQxa1t iDRNoUBtJWfZv2n9Jnx+JeibxpgdJVHZ6MkQyd3WPPms9DYIZQGdJs4aAKjarrAtlO 8cyh27OXJFFD5RSMCc7xmXtbl/Q2gBLyCMQJith6+lfaCirGYkMWY6lbdHrfL772ZL 93M/z+JOfLzAtkYwiSmpVWvpMLYMG4J4/xroroCy+i3Ec8/2bSyAYCn4RNDHrTWXbo jQpxKowPoYBVCXxZe0Gf67MFxCnZf4herzex827Gr51jWK1pK2adYUlBNzGzITna5N H/I5VcMZfZvpbNDLLaiBxF/eNdv9r5rIzHE4md9o4mdc6W0D+Vi57zaAJR2Z1eglJo v4Um0g623+D3hGJBi1D4qvp7qKJBx2VUZRydai6ERykIftNjnjSFW+86R74v2aXKX0 jSvBDZVzy5oe50ai+FoU8+17Mqc3BtBfFzNZq9ND+0fMwHDZdyQ0au1TAhTYPzf3Pb dnczJocSSnGoGrlOaZ4KzOUI= Received: from zn.tnic (p5de8ed27.dip0.t-ipconnect.de [93.232.237.39]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with UTF8SMTPSA id E1CC740E00DE; Mon, 6 Oct 2025 14:04:48 +0000 (UTC) Date: Mon, 6 Oct 2025 16:04:42 +0200 From: Borislav Petkov To: "Kaplan, David" Cc: Thomas Gleixner , Peter Zijlstra , Josh Poimboeuf , Pawan Gupta , Ingo Molnar , Dave Hansen , "x86@kernel.org" , "H . Peter Anvin" , Klaus Kusche , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] x86/bugs: Qualify RETBLEED_INTEL_MSG Message-ID: <20251006140442.GDaOPMemqB7SRJSHWL@fat_crate.local> References: <20251003171936.155391-1-david.kaplan@amd.com> <20251006131126.GBaOO__iUbQHNR6QhW@fat_crate.local> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Mon, Oct 06, 2025 at 01:58:55PM +0000, Kaplan, David wrote: > Sounds rather yucky. I'll give it a try at some point and see how ugly it becomes... > What about just not calling cpu_select_mitigations() if > CONFIG_CPU_MITIGATIONS=n? Then you won't get any print messages either I'd > think. I want to not compile in that code at all if CPU_MITIGATIONS=off, actually. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette