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 9536CC7115B for ; Fri, 20 Jun 2025 16:13:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3B9DE6B0092; Fri, 20 Jun 2025 12:13:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 391B26B0093; Fri, 20 Jun 2025 12:13:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2A7836B0096; Fri, 20 Jun 2025 12:13:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 19E3B6B0092 for ; Fri, 20 Jun 2025 12:13:16 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id B82C41D7B1E for ; Fri, 20 Jun 2025 16:13:15 +0000 (UTC) X-FDA: 83576273550.06.9C8D2F0 Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) by imf08.hostedemail.com (Postfix) with ESMTP id CD0DF160007 for ; Fri, 20 Jun 2025 16:13:13 +0000 (UTC) Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=zytor.com header.s=2025052101 header.b=NoWCCOpi; spf=pass (imf08.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=1750435994; 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=od7VOU+Vgb8+R5vxfgKCe9w48z7ysNa+RJDKpFTFMrk=; b=eSb2tmaw4MsvwVUyiU2TBP+9IW1xpX9btMgg/ExK3kSHufqsr5nXEl3QwojtDOtdRFq9Tv Tkba3cUrWJ6L+1eKLAYCN0TC6GHna7jlGYZPCjMCjymrkNEK31N81ErR/o9IH0ApJOleSx UUuw3DICXAqmXSfSrJwDIPiNRVA93MY= ARC-Authentication-Results: i=1; imf08.hostedemail.com; dkim=pass header.d=zytor.com header.s=2025052101 header.b=NoWCCOpi; spf=pass (imf08.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=1750435994; a=rsa-sha256; cv=none; b=3LgBhlOOhnHOPvqY/K6Znp6illUm/26a+nzNJRgMO2ZQdOF3cS3hgiI1kaRYjWYoVbTL1b 5sPcr01yQFRRiFKoeyozZEqDlOqsLeMkOje/NJOyGP4lRUC2ddFg+dJEY/v224dC9NMrNZ T1xwsFN2qLb653cdowG6NgKFiTd7BOI= 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 55KGCOU92549536 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO); Fri, 20 Jun 2025 09:12:25 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 55KGCOU92549536 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2025052101; t=1750435949; bh=od7VOU+Vgb8+R5vxfgKCe9w48z7ysNa+RJDKpFTFMrk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=NoWCCOpiahyyyMkwLm0Z8Zf5fjEhS5Hexwzxgl/OeAD2fsaCRNRSebZJXp7aF8pIR 6z5p2JPtgfJuYyMZKr66F1fNNROopW381MG2/nqP1od5JrnuECmMtc2EdYRjvPkIGJ zkpj1CNwWaKgYtJLCxHMsW1pDQW5KU0CoxmJUGwecj8ZBxaFaKN4BzHm1nJBG2cbZa JioC3k1ZCNTJhAkrk7iulKgyMXFnnNhZWDldmi4elM7CdycWQcOH3fxLSoeg0P8idr PqoFr5gBQGfXJr5IoEub99KBdsBEgpoVkn/hwV21Eqq38JCJBDaajKjc1XKu+y7xFh QDRd1MVtZAnpQ== Message-ID: <98703493-109a-4795-8abd-6cfe10b941f4@zytor.com> Date: Fri, 20 Jun 2025 09:12:23 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCHv6 01/16] x86/cpu: Enumerate the LASS feature bits To: Randy Dunlap , "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> <25600557-9cd5-406c-9acf-abc163afde2d@infradead.org> 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: <25600557-9cd5-406c-9acf-abc163afde2d@infradead.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: CD0DF160007 X-Stat-Signature: y1gbaisimeeyzs71oj1k15a1rfgrmhux X-HE-Tag: 1750435993-776321 X-HE-Meta: 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 c1x8zEeZ TiYjQ4ab/oTSJNp52BqD3mBEgLOd7dCPmWra/TILy3pQ2cVjrSHF88LVSgLuzgLCJkxfIzcRLNd69OroelPHBDgCCzXcShW0Sp3FFtZ+RMmx3inKQm3UYB9Msq53Y3Cm+9RE/ighn6TQjsuGFl7o6tMnhm8pPyc4JjvG+PqQu/oip/+Uo3LjDVkldeq3RzGD2Uf6lre3mzU3EsJzB1/fY558z7iH/jVYZoQR62Eqj2wO+Ik2JRLI0FnO1R1UDR82QvWL95v6Y7xH2XdE2XA1B7ePgnRxMfAh9C7Y91CPgbmlElBDqGm3czJpmprRqHH+n+MPtbQhCVyb0MAfhT+bKoMaMzfCFbZ6vP8eYHV71d9jWWmg= 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 9:02 AM, Randy Dunlap wrote: >> +config X86_DISABLED_FEATURE_LASS >> + def_bool y >> + depends on !X86_64 > Please explain why this is !X86_64. When NOT on X86_64, the LASS code should not be compiled. But first of all, as I replied earlier, X86_DISABLED_FEATURE_LASS is completely not needed. Thanks! Xin