From patchwork Wed Aug 28 05:49:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charlie Jenkins X-Patchwork-Id: 13780673 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AB016C5474F for ; Wed, 28 Aug 2024 05:49:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=XI8daLBs7JEVkRXCcb9vAmNthNQZ3YMdXlYbydjPEuo=; b=HseagyuNqJAbmF bMXoUbBT/h7/OtUF07oem64/KpELqMaOqHrG/cTsJv9/v6Wtz+Ng508mHTxs0/6dRQENHFP0/wrsJ 0Vv49bwzPleEKMd3/C408vrRQMG3bxFVgDRIXl+TPgkFQlptWVDH8dY9Ngk6//XhFqO4ewu8jcVTv gc3xvEiKP5O69ZIOb4oWJMdgwK1Gv4dVfAk9THPDZ2D8pRmKZO+ZRAOg1eY26O9sRHZ0BK2dYRwLZ B/n9glofHDwRpFSAA0kw5u+Y8FZlX4kKfUr5uAzURmmz7KOrVxa0Y55yHbKv1ym/O6fY4RhKsE2Hg d3ZRM2075BbAFpmbgCKw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sjBYu-0000000DxxG-21HI; Wed, 28 Aug 2024 05:49:44 +0000 Received: from mail-pf1-x42b.google.com ([2607:f8b0:4864:20::42b]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sjBYq-0000000DxtO-3e2M for linux-riscv@lists.infradead.org; Wed, 28 Aug 2024 05:49:42 +0000 Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-714263cb074so4433457b3a.1 for ; Tue, 27 Aug 2024 22:49:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1724824180; x=1725428980; darn=lists.infradead.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=g+f5iieqZfHqFwlVhHOpYZvOeyZcJe//7AT/XT4juc0=; b=fmQ0abtavFMnGvynjdQB4JcNJj9zrDq8FQkwn8zU2/+DJjb1mFZEzjsgDRHLidTnDH cd9cilJNaelXb8kUzu+VLJuFLhsKJcLMCHvsKMcC1C4dHfz8Ev0l0SkAHseKvlgQmHkp 5mv8DfOFjJWDYf4U9rnr/jpococaGS1GfpvPgX1th9N52oyePpHHV6SsX2JzFfcEJw+V Bo9mFyUtjn+UO/twqcJcXZtsEe2nY00P0MtVq70bYiH39BaodGwdsBQtBjF84ES4zaZp 9D5ZbMh+hMrvk0xGOp9Blu9yfjCBMzdKPDl0zBibOESWGQLA3Vgzz1fYHJlD9K1UfOQe w40w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724824180; x=1725428980; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=g+f5iieqZfHqFwlVhHOpYZvOeyZcJe//7AT/XT4juc0=; b=iUp0uNbDAjnTJlGQnFq2ZTqnvoxVfZNQwwkeSKOiOTDghQBAlVYF3SBugFwLX2PxNs QpHEanBwVNFVuHn5MBl5aF+FWA3Tvt1vviFwiBBBQGNxCkvD5retS2+lykML3H5hCgI0 kzeU2aB3FWWsCQnf1Y3evNhiIh59kUaZpdUTQsTIBj3qBpKDfyWWaZHP9Gm1gYGJIDmt AmME0tXAavUGMxvyV1ju6k7TiKk8Co6BWaqgZtK91/WJ+W4mOsmlEHAx4lPM7Od9VSpC wKxO9sUjSbmM+aTlHRfvwol5CUimArUKzK37i08ddr4UmZtoY+QOqg+TCANBhRLKcXu3 S7Cg== X-Forwarded-Encrypted: i=1; AJvYcCX1Z1a8aJxWWAgFEy/ZAscHKcnRVHC/gl2gdloKHErYvwGEJTqdByulvMVQtRu7YifR2v1HWGhktucxJQ==@lists.infradead.org X-Gm-Message-State: AOJu0Yx3+ahEG4YW1rCf3hNgTOrZX0eGgXo8bNAkQ2IxvY7096EcVQ3j cJu7NDhLr/UIqzWS08TPO78b8akEhNZHCXofxjIj8pSxem5Bmemje25Bn6MOzC0= X-Google-Smtp-Source: AGHT+IGKYEbmAbccdwLglj8Rtz7Ncms8BNc+Vjhrih2XUvI/cV2bfefpghFryVXCiPvCQUUiKdRNjQ== X-Received: by 2002:a05:6a21:3401:b0:1c6:a777:4cfa with SMTP id adf61e73a8af0-1cc8b475035mr13030363637.13.1724824179851; Tue, 27 Aug 2024 22:49:39 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-203855df0c4sm92092495ad.157.2024.08.27.22.49.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Aug 2024 22:49:39 -0700 (PDT) From: Charlie Jenkins Date: Tue, 27 Aug 2024 22:49:10 -0700 Subject: [PATCH 04/16] mm: Add generic MAP_BELOW_HINT MIME-Version: 1.0 Message-Id: <20240827-patches-below_hint_mmap-v1-4-46ff2eb9022d@rivosinc.com> References: <20240827-patches-below_hint_mmap-v1-0-46ff2eb9022d@rivosinc.com> In-Reply-To: <20240827-patches-below_hint_mmap-v1-0-46ff2eb9022d@rivosinc.com> To: Arnd Bergmann , Paul Walmsley , Palmer Dabbelt , Albert Ou , Catalin Marinas , Will Deacon , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Muchun Song , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Lorenzo Stoakes , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Huacai Chen , WANG Xuerui , Russell King , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , "David S. Miller" , Andreas Larsson , Shuah Khan , Alexandre Ghiti Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Palmer Dabbelt , linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-kselftest@vger.kernel.org, Charlie Jenkins X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2165; i=charlie@rivosinc.com; h=from:subject:message-id; bh=+G9/grHdHxL6H0Lnh65S6ISh5epJb2mrAov/AP0hs9c=; b=owGbwMvMwCHWx5hUnlvL8Y3xtFoSQ9q5XXGZXkeVtgeold2b3dqjkt+vEXMu6H6oc1bJNYtbJ 3aetlzTUcrCIMbBICumyMJzrYG59Y5+2VHRsgkwc1iZQIYwcHEKwERWFTEyNKap9S5rOHHkFBPT SkUp8yq1Cd/4ljyftDBFnmW663I5b4Z/RluSpK/6drw7JD8vOuPN75znwc73OQp/v/2R9GK2Tfl mPgA= X-Developer-Key: i=charlie@rivosinc.com; a=openpgp; fpr=7D834FF11B1D8387E61C776FFB10D1F27D6B1354 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240827_224940_962216_37F28B5F X-CRM114-Status: GOOD ( 13.52 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Make the generic implementation of arch_get_mmap_base() and arch_get_mmap_end() support MAP_BELOW_HINT. Signed-off-by: Charlie Jenkins --- include/linux/sched/mm.h | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index 265b43855d0b..c350bb5ac0a2 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -9,6 +9,7 @@ #include #include #include +#include /* * Routines for handling mm_structs @@ -170,11 +171,40 @@ static inline void mm_update_next_owner(struct mm_struct *mm) #ifdef CONFIG_MMU #ifndef arch_get_mmap_end -#define arch_get_mmap_end(addr, len, flags) (TASK_SIZE) +#define arch_get_mmap_end(addr, len, flags) \ +({ \ + unsigned long mmap_end; \ + typeof(flags) _flags = (flags); \ + typeof(addr) _addr = (addr); \ + typeof(len) _len = (len); \ + mmap_end = TASK_SIZE; \ + if (_flags & MAP_BELOW_HINT && _addr != 0) \ + mmap_end = MIN(mmap_end, _addr + _len); \ + mmap_end; \ +}) #endif #ifndef arch_get_mmap_base -#define arch_get_mmap_base(addr, len, base, flags) (base) +/* + * rnd_gap is defined to be (STACK_TOP - _base) due to the definition of + * mmap_base in mm/util.c + * + * Assumes ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT, which all architectures that + * implement generic mmap use + */ +#define arch_get_mmap_base(addr, len, base, flags) \ +({ \ + unsigned long mmap_base; \ + typeof(flags) _flags = (flags); \ + typeof(addr) _addr = (addr); \ + typeof(base) _base = (base); \ + typeof(len) _len = (len); \ + unsigned long rnd_gap = STACK_TOP - _base; \ + mmap_base = _base; \ + if (_flags & MAP_BELOW_HINT && _addr != 0) \ + mmap_base = MIN(mmap_base, (_addr + _len) - rnd_gap); \ + mmap_base; \ +}) #endif extern void arch_pick_mmap_layout(struct mm_struct *mm,