From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 559AAC71155 for ; Fri, 20 Jun 2025 15:37:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id EE8F46B00A0; Fri, 20 Jun 2025 11:37:18 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EC0BB6B00A1; Fri, 20 Jun 2025 11:37:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DD6B06B00A2; Fri, 20 Jun 2025 11:37:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id CD6C96B00A0 for ; Fri, 20 Jun 2025 11:37:18 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 5FBD31D779C for ; Fri, 20 Jun 2025 15:37:18 +0000 (UTC) X-FDA: 83576182956.03.2A05BEB Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) by imf25.hostedemail.com (Postfix) with ESMTP id 81810A0003 for ; Fri, 20 Jun 2025 15:37:16 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=zytor.com header.s=2025052101 header.b=KFS06hQQ; spf=pass (imf25.hostedemail.com: domain of xin@zytor.com designates 198.137.202.136 as permitted sender) smtp.mailfrom=xin@zytor.com; dmarc=pass (policy=none) header.from=zytor.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1750433836; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=oCW/J/1RUQhL0Ft/nOGztIGfjS7+RnidS0LQCvAl12A=; b=wP/5wNnNW849FGm+gisU6QnWVa+RPL43BdFfI9qjtJwN2TjX+i8udvP3c+RD1K649aErCs k05Ezua5K1pmtcTaA0Z1dBGFqrV5NKdavipN8T5Az+jrKc5poUjeo6GfTKo4P1UTveasuc o9GDGbvpXmGMyPc0MSROnsjslJPwaHo= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=zytor.com header.s=2025052101 header.b=KFS06hQQ; spf=pass (imf25.hostedemail.com: domain of xin@zytor.com designates 198.137.202.136 as permitted sender) smtp.mailfrom=xin@zytor.com; dmarc=pass (policy=none) header.from=zytor.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1750433836; a=rsa-sha256; cv=none; b=4QURyOrSzPQ2DECQc6ydQbm9JEjjhb2j5LvIaXHwE+6v1heKh+ptHKUyQtwaOmIFeD0LI2 +VYbSe1vjVLnbAERGeuytzsIodJ2TzBHi3AWGpHZcPQR21Ivr1qu/1xoDAmNyZIG375YNk f1ICD+ruBVMAjWePdC13WdTqDouq/eU= Received: from [192.168.7.202] ([71.202.166.45]) (authenticated bits=0) by mail.zytor.com (8.18.1/8.17.1) with ESMTPSA id 55KFaVt12538338 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO); Fri, 20 Jun 2025 08:36:31 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 55KFaVt12538338 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2025052101; t=1750433795; bh=oCW/J/1RUQhL0Ft/nOGztIGfjS7+RnidS0LQCvAl12A=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=KFS06hQQeqKZTWcts+tcFjUaPdCX6zLm3wUx2hZSX2LUTM4qMAeJcoFbSvV34M9pj kt/W3oc1ZrDPwUzTEbjIxlva9idnCKlzjUS65IlRGBBIPvwmkeB8N0ExCjb9YsT+lU U02pUfUNHQNozGuNp/gH9n2UqvEA5HpyWAis7PSS2pBsos5cCi4d9UvcN6sD8wajnJ jIb54WAn+jofvtSh6xiRd328sLhmUfVy4PRGDtzep3DQDLnjde9ojvtCMX0Rp/1n2N BeKQa4sPGWAF/Pg5bLO3rRgX0WaEbBnVnbeVgLN1Oax8n8s4JE2LSJHy8tPLHyWZqW 0c3XsE1xcWhlw== Message-ID: Date: Fri, 20 Jun 2025 08:36:30 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCHv6 01/16] x86/cpu: Enumerate the LASS feature bits To: "Kirill A. Shutemov" , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Peter Zijlstra , Ard Biesheuvel , "Paul E. McKenney" , Josh Poimboeuf , Xiongwei Song , Xin Li , "Mike Rapoport (IBM)" , Brijesh Singh , Michael Roth , Tony Luck , Alexey Kardashevskiy , Alexander Shishkin Cc: Jonathan Corbet , Sohil Mehta , Ingo Molnar , Pawan Gupta , Daniel Sneddon , Kai Huang , Sandipan Das , Breno Leitao , Rick Edgecombe , Alexei Starovoitov , Hou Tao , Juergen Gross , Vegard Nossum , Kees Cook , Eric Biggers , Jason Gunthorpe , "Masami Hiramatsu (Google)" , Andrew Morton , Luis Chamberlain , Yuntao Wang , Rasmus Villemoes , Christophe Leroy , Tejun Heo , Changbin Du , Huang Shijie , Geert Uytterhoeven , Namhyung Kim , Arnaldo Carvalho de Melo , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, linux-mm@kvack.org, Yian Chen References: <20250620135325.3300848-1-kirill.shutemov@linux.intel.com> <20250620135325.3300848-2-kirill.shutemov@linux.intel.com> Content-Language: en-US From: Xin Li Autocrypt: addr=xin@zytor.com; keydata= xsDNBGUPz1cBDACS/9yOJGojBFPxFt0OfTWuMl0uSgpwk37uRrFPTTLw4BaxhlFL0bjs6q+0 2OfG34R+a0ZCuj5c9vggUMoOLdDyA7yPVAJU0OX6lqpg6z/kyQg3t4jvajG6aCgwSDx5Kzg5 Rj3AXl8k2wb0jdqRB4RvaOPFiHNGgXCs5Pkux/qr0laeFIpzMKMootGa4kfURgPhRzUaM1vy bsMsL8vpJtGUmitrSqe5dVNBH00whLtPFM7IbzKURPUOkRRiusFAsw0a1ztCgoFczq6VfAVu raTye0L/VXwZd+aGi401V2tLsAHxxckRi9p3mc0jExPc60joK+aZPy6amwSCy5kAJ/AboYtY VmKIGKx1yx8POy6m+1lZ8C0q9b8eJ8kWPAR78PgT37FQWKYS1uAroG2wLdK7FiIEpPhCD+zH wlslo2ETbdKjrLIPNehQCOWrT32k8vFNEMLP5G/mmjfNj5sEf3IOKgMTMVl9AFjsINLHcxEQ 6T8nGbX/n3msP6A36FDfdSEAEQEAAc0WWGluIExpIDx4aW5Aenl0b3IuY29tPsLBDQQTAQgA NxYhBIUq/WFSDTiOvUIqv2u9DlcdrjdRBQJlD89XBQkFo5qAAhsDBAsJCAcFFQgJCgsFFgID AQAACgkQa70OVx2uN1HUpgv/cM2fsFCQodLArMTX5nt9yqAWgA5t1srri6EgS8W3F+3Kitge tYTBKu6j5BXuXaX3vyfCm+zajDJN77JHuYnpcKKr13VcZi1Swv6Jx1u0II8DOmoDYLb1Q2ZW v83W55fOWJ2g72x/UjVJBQ0sVjAngazU3ckc0TeNQlkcpSVGa/qBIHLfZraWtdrNAQT4A1fa sWGuJrChBFhtKbYXbUCu9AoYmmbQnsx2EWoJy3h7OjtfFapJbPZql+no5AJ3Mk9eE5oWyLH+ QWqtOeJM7kKvn/dBudokFSNhDUw06e7EoVPSJyUIMbYtUO7g2+Atu44G/EPP0yV0J4lRO6EA wYRXff7+I1jIWEHpj5EFVYO6SmBg7zF2illHEW31JAPtdDLDHYcZDfS41caEKOQIPsdzQkaQ oW2hchcjcMPAfyhhRzUpVHLPxLCetP8vrVhTvnaZUo0xaVYb3+wjP+D5j/3+hwblu2agPsaE vgVbZ8Fx3TUxUPCAdr/p73DGg57oHjgezsDNBGUPz1gBDAD4Mg7hMFRQqlzotcNSxatlAQNL MadLfUTFz8wUUa21LPLrHBkUwm8RujehJrzcVbPYwPXIO0uyL/F///CogMNx7Iwo6by43KOy g89wVFhyy237EY76j1lVfLzcMYmjBoTH95fJC/lVb5Whxil6KjSN/R/y3jfG1dPXfwAuZ/4N cMoOslWkfZKJeEut5aZTRepKKF54T5r49H9F7OFLyxrC/uI9UDttWqMxcWyCkHh0v1Di8176 jjYRNTrGEfYfGxSp+3jYL3PoNceIMkqM9haXjjGl0W1B4BidK1LVYBNov0rTEzyr0a1riUrp Qk+6z/LHxCM9lFFXnqH7KWeToTOPQebD2B/Ah5CZlft41i8L6LOF/LCuDBuYlu/fI2nuCc8d m4wwtkou1Y/kIwbEsE/6RQwRXUZhzO6llfoN96Fczr/RwvPIK5SVMixqWq4QGFAyK0m/1ap4 bhIRrdCLVQcgU4glo17vqfEaRcTW5SgX+pGs4KIPPBE5J/ABD6pBnUUAEQEAAcLA/AQYAQgA JhYhBIUq/WFSDTiOvUIqv2u9DlcdrjdRBQJlD89ZBQkFo5qAAhsMAAoJEGu9DlcdrjdR4C0L /RcjolEjoZW8VsyxWtXazQPnaRvzZ4vhmGOsCPr2BPtMlSwDzTlri8BBG1/3t/DNK4JLuwEj OAIE3fkkm+UG4Kjud6aNeraDI52DRVCSx6xff3bjmJsJJMb12mWglN6LjdF6K+PE+OTJUh2F dOhslN5C2kgl0dvUuevwMgQF3IljLmi/6APKYJHjkJpu1E6luZec/lRbetHuNFtbh3xgFIJx 2RpgVDP4xB3f8r0I+y6ua+p7fgOjDLyoFjubRGed0Be45JJQEn7A3CSb6Xu7NYobnxfkwAGZ Q81a2XtvNS7Aj6NWVoOQB5KbM4yosO5+Me1V1SkX2jlnn26JPEvbV3KRFcwV5RnDxm4OQTSk PYbAkjBbm+tuJ/Sm+5Yp5T/BnKz21FoCS8uvTiziHj2H7Cuekn6F8EYhegONm+RVg3vikOpn gao85i4HwQTK9/D1wgJIQkdwWXVMZ6q/OALaBp82vQ2U9sjTyFXgDjglgh00VRAHP7u1Rcu4 l75w1xInsg== In-Reply-To: <20250620135325.3300848-2-kirill.shutemov@linux.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 81810A0003 X-Stat-Signature: rqbaj3gz934j8i4edd6jn3fewd7haoe9 X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1750433836-244488 X-HE-Meta: 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 AIc+3a0H GzozRcNqCPDoJkBjzyl1WQ4lQXPXPdv4wVyqevz/bzMF2plhmqhFXRX3xowU45C8+RHEc X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 6/20/2025 6:53 AM, Kirill A. Shutemov wrote: > diff --git a/arch/x86/Kconfig.cpufeatures b/arch/x86/Kconfig.cpufeatures > index 250c10627ab3..9574c198fc08 100644 > --- a/arch/x86/Kconfig.cpufeatures > +++ b/arch/x86/Kconfig.cpufeatures > @@ -124,6 +124,10 @@ config X86_DISABLED_FEATURE_PCID > def_bool y > depends on !X86_64 > > +config X86_DISABLED_FEATURE_LASS > + def_bool y > + depends on !X86_64 > + > config X86_DISABLED_FEATURE_PKU > def_bool y > depends on !X86_INTEL_MEMORY_PROTECTION_KEYS You don't need to add X86_DISABLED_FEATURE_LASS, because the LASS code is NOT optional at build time, i.e., you now don't have CONFIG_X86_LASS. It was removed per the change log: Changes from v1[1]: - Remove CONFIG_X86_LASS Thanks! Xin