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 18A03C7EE2A for ; Tue, 24 Jun 2025 08:23:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B856D6B00B1; Tue, 24 Jun 2025 04:23:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B0EE16B00B2; Tue, 24 Jun 2025 04:23:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9FED66B00B3; Tue, 24 Jun 2025 04:23:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 88E4B6B00B1 for ; Tue, 24 Jun 2025 04:23:56 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 455D981D17 for ; Tue, 24 Jun 2025 08:23:56 +0000 (UTC) X-FDA: 83589606072.07.901A905 Received: from mail-ed1-f52.google.com (mail-ed1-f52.google.com [209.85.208.52]) by imf23.hostedemail.com (Postfix) with ESMTP id 674D3140004 for ; Tue, 24 Jun 2025 08:23:54 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=karPhU6b; spf=pass (imf23.hostedemail.com: domain of khaliidcaliy@gmail.com designates 209.85.208.52 as permitted sender) smtp.mailfrom=khaliidcaliy@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1750753434; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=2H7FVeT03BXWcr+Xp7XmzKQpCwCD96qmn55NwEfYCg4=; b=aUFC98zF8Hf0iZk6hcm/qygwp3yZjcgd/5ND74KF49s9y8DCJ+BSdqaKRU/dlzvYtCFqhY pwik0EIloVoznLsjYYa7OdQfSwmIjXLvMaExKFnSp7HhMWjFwVPU2O2h9dTEqf2/2JrcAc w6LqzDMpqjVuMuYDrz9Tx1xZthe+yYI= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=karPhU6b; spf=pass (imf23.hostedemail.com: domain of khaliidcaliy@gmail.com designates 209.85.208.52 as permitted sender) smtp.mailfrom=khaliidcaliy@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1750753434; a=rsa-sha256; cv=none; b=rPX+/PE1WSFSSXq9xWGpSBdxf1mmEzfEKrzTCutxGcY/KQJGhSe3IfbczKBbpFCNeT7fGF BYkFk2NCossxD7x5CKPKkEjI6X2ukeNlQ1uwT3Dfxt2Zw1lw159Y30+iw4AYUFH3PlsthF dUtmwHuBvUO6vhMlUYABxdReAIjzUbQ= Received: by mail-ed1-f52.google.com with SMTP id 4fb4d7f45d1cf-601dfef6a8dso8019327a12.1 for ; Tue, 24 Jun 2025 01:23:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1750753433; x=1751358233; darn=kvack.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2H7FVeT03BXWcr+Xp7XmzKQpCwCD96qmn55NwEfYCg4=; b=karPhU6bitEyImaYbSme1OZFKc3/TyxHkx9b3h7Wgj+qvTEt62634O7vX7GZF2JK0K 7lVrMLKvB0LAviAOSB6hOgEujaZz4HMclw9V2tcHbWlcqVskI1cQaPCRDIclwj/7m9/J KpxINP1me29fuwBQB0SQeeCmv+8mO2nPvuQl4Kp29YE8DLwCFfvfebFLonDifgO6+kkZ P6mjMQcX/xHAkqggVrfXi6jaVU4GVX7Df+b9KNhd4xxDt5WOMFjOZYktIvMS0HCG+F+G IX4l1RZGgrxZnu2l4CrIsN8H+VLVnZxtFNGvfaaVthy1xD2s4KlFggwTIGYx9rV5myX/ UmMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750753433; x=1751358233; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2H7FVeT03BXWcr+Xp7XmzKQpCwCD96qmn55NwEfYCg4=; b=Uxkkv0StRC62x4fgCUK8Y+ptiNbbE4FoqSj6KAUJFlneMToUv0968mhZAjFGIznR1O I8RKJ8uTxyGEBKDfXecPjBk2KKJ8bpKrxEIVoGpNf+6dY5AgDl7VYSy5kHHLxfN/8BSK OhVxdkRJ/kGL/cG23C5RyocNiomWZQzoDcs06z4vzCLln9d68pAyggcF22sl102t4jBE OwUED1CkZrGhfN/AySa0LAGe2hzlRG0lz9CMqpFwueC1lALtFj+Adp0AlbQlhEZdzLkS 6kitDu8AiaQy5+Kork5jnoXW0ltBT9RPiGtgi9jCy3lw4F3CS6NWYse6H5CDDsTwRL+w cVQA== X-Forwarded-Encrypted: i=1; AJvYcCXfqU0exaGW7dm46iWACeuJtLHUZPYGxSgClcWlUrTOgEs0Ewwyp5yGHtY+/I81WxKlzTlfPYugLQ==@kvack.org X-Gm-Message-State: AOJu0YwFAZIneE18FJRldUmZ6x7owLftwI6Zv2Eg+jWiTuPANvnkOn4X k2xsFOwYYsusb6NAfZudU+RrRklFFwLzLJeZZXIdCV/quX7yAqfJ4tA6 X-Gm-Gg: ASbGnctbyd4m8dVqCdK4RfdqgnEI3SoxBphqRxYb/YFQpViKrRblm/5KvgMEaaBaXGb Gs0+PRu1ykY3mvkila9EKQZ406X2paacdXNWY4n69pvhGQzjZ9ZwPjR8l0vrejRsYgLxdNvtyEq A/Tz5kKunOvNcXKs5N6b1W2IfKwvZFyUm0C9OGcJ/stZSypgG+esj0drVV/rE22U3yFg9RWOE9i hzDOmE+MBDSMJ+kLQQcy2DEULg2ccA/gmnU6RgaBW7aXKaq14lv5JnChiahT2Mh/qo9vKmYPl6w LOij75hNckLyCnLrhJKOS1u/Nzl2BC+TWoUB1XJyAyFxYHvkFONTi/ssKkq90DfExbcoR33eS19 J X-Google-Smtp-Source: AGHT+IE6uFBShvRtJlJrHnQfSTfKaDchryVCXm3Xlc5jSRa7ZBWQ78xrOHfYewZsoH8M4NZdRafhDg== X-Received: by 2002:a17:907:9816:b0:ad8:9b24:9d16 with SMTP id a640c23a62f3a-ae0579cd970mr1424596366b.6.1750753432204; Tue, 24 Jun 2025 01:23:52 -0700 (PDT) Received: from localhost.localdomain ([41.79.198.24]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ae053e7c6fdsm829165466b.3.2025.06.24.01.23.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Jun 2025 01:23:52 -0700 (PDT) From: Khalid Ali X-Google-Original-From: Khalid Ali X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250516123306.3812286-1-kirill.shutemov@linux.intel.com> References: <20250516123306.3812286-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 674D3140004 X-Stat-Signature: 6j1dz1hydrgroqcnrrzucmy47yjbkj3a X-HE-Tag: 1750753434-419373 X-HE-Meta: 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 3YnyVYum zA6k9ftEjt8FMCSDf4sot/i7kTg== 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: >Both Intel and AMD CPUs support 5-level paging, which is expected to >become more widely adopted in the future. > >Remove CONFIG_X86_5LEVEL. > >In preparation to that remove CONFIG_DYNAMIC_MEMORY_LAYOUT and make >SPARSEMEM_VMEMMAP the only memory model. > >v3: > - Drop few "#if CONFIG_PGTABLE_LEVELS >= 5"; > - Make PARAVIRT_XXL 64-bit explicitly and drop ifdefs > to support PGTABLE_LEVELS < 5; > - Add Reviewed-by tags from Ard; >v2: > - Fix 32-bit build by wrapping p4d_set_huge() and p4d_clear_huge() in > #if CONFIG_PGTABLE_LEVELS > 4; > - Rebased onto current tip/master; > >Kirill A. Shutemov (4): > x86/64/mm: Always use dynamic memory layout > x86/64/mm: Make SPARSEMEM_VMEMMAP the only memory model > x86/64/mm: Make 5-level paging support unconditional > x86/paravirt: Restrict PARAVIRT_XXL to 64-bit only > > Documentation/arch/x86/cpuinfo.rst | 8 ++--- > .../arch/x86/x86_64/5level-paging.rst | 9 ----- > arch/x86/Kconfig | 33 ++----------------- > arch/x86/Kconfig.cpufeatures | 4 --- > arch/x86/boot/compressed/pgtable_64.c | 11 ++----- > arch/x86/boot/header.S | 4 --- > arch/x86/boot/startup/map_kernel.c | 5 +-- > arch/x86/entry/vsyscall/vsyscall_64.c | 2 -- > arch/x86/include/asm/page_64.h | 2 -- > arch/x86/include/asm/page_64_types.h | 11 ------- > arch/x86/include/asm/paravirt.h | 4 --- > arch/x86/include/asm/paravirt_types.h | 2 -- > arch/x86/include/asm/pgtable_64.h | 2 -- > arch/x86/include/asm/pgtable_64_types.h | 24 -------------- > arch/x86/kernel/alternative.c | 2 +- > arch/x86/kernel/head64.c | 4 --- > arch/x86/kernel/head_64.S | 2 -- > arch/x86/kernel/paravirt.c | 2 -- > arch/x86/mm/init.c | 4 --- > arch/x86/mm/init_64.c | 9 +---- > arch/x86/mm/pgtable.c | 2 +- > arch/x86/xen/mmu_pv.c | 4 --- > drivers/firmware/efi/libstub/x86-5lvl.c | 2 +- > scripts/gdb/linux/pgtable.py | 4 +-- > 24 files changed, 14 insertions(+), 142 deletions(-) I think i am too late, however this is completely wrong. There are still processors that doesn't support 5-level paging which is mordern. We may call those processors old, however they are still common and used. So this patch seem too early for that. Some intel core-i5 and core-i7 doesn't support 5-level paging at all. This will break x86_64 cpus that doesn't support 5-level paging.