From patchwork Wed Aug 28 05:49:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charlie Jenkins X-Patchwork-Id: 13780617 Received: from mail-pl1-f176.google.com (mail-pl1-f176.google.com [209.85.214.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A440A15EFA0 for ; Wed, 28 Aug 2024 05:50:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724824223; cv=none; b=kbrzg4cPRTnEAoPjpOrB1pvoeNhr3xcOiuepECP+RVcTsjPznAGeGUgv3IaG+ZRnFK9gCE2EnsY1rUl0j8JMpiL9RRSYAj8Q7p6Se6JQ5Ad3CbmDWWCoMiFOQwE1YVKOrdUSm3V17DduXElGF9Mg6ECQ+x7AOEp7urmQmJgqMFk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724824223; c=relaxed/simple; bh=bFLw7L4BlwG3KLICmNgvPIAvf1/5Sm3GeWEQAkx1eJA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=eH81IzL28JfQ2rGQqMs6eJn8FXLFz5nTWg9uOGxXul3xgRyCkW6VXrjDQfZZlNRuzQ02Jg0vc+82CH9WHxrnpcU2wzShzuPLf4+8mw/GoOaIcWQpo/X+sgs27gkD20byJ3RWMmx9Xs0GSrZ+GwxoSnJfyxVAH7L/dG7PPp5SHDY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com; spf=pass smtp.mailfrom=rivosinc.com; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b=sxDFGbVG; arc=none smtp.client-ip=209.85.214.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b="sxDFGbVG" Received: by mail-pl1-f176.google.com with SMTP id d9443c01a7336-2021c08b95cso2125745ad.0 for ; Tue, 27 Aug 2024 22:50:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1724824221; x=1725429021; darn=vger.kernel.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=n1bnpMYTna27bSqlaeNn9zMkLMdTuL1lgzvNhNTdiTs=; b=sxDFGbVGjoz0x7IjUj+0+lr/jueiOzguOCsO9ZcVBLFlrqxx6t5LqRwtT0W+HYL7sK fbsyxy6Wmao623MRZ5O9KbFsLvl549QiOue33YER2YeTYwgESZe6vk3DPekCtbRqvXz4 VS1hIcYPDSDHv6LzWmvXvYsgNVRnZ8mXg+tWj0BGX1RA41O8hN4d5VeOreNdbPYaEcIu PJU4cJrbRhvhwaan7rl3lCJ6UW8aFGjW8lt2wJwIElP1ZK0lwB9uXng4KQrOuusm+Dtb Aq4AWx/H9WJ+e6aUo/lp6Sigd535qnZtiEdanT7dgnUbMKoa/MbwY2abJqE0B+v9QwOC LRHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724824221; x=1725429021; 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=n1bnpMYTna27bSqlaeNn9zMkLMdTuL1lgzvNhNTdiTs=; b=DxAlWpXXqR9MMT83pf4DXVDT07jmhC150oOLgkuSLvXeAplCUqcWMme/Ni3RkJnRMQ ugrBm1xYfJiU9UgmMAQepjjYQ5hD4tv/44TH489WBiTtFiVfujb3EWjPtWcdX/eHMx2m fOFYbrZcyAWmlSo7CMB7lr/Q0pmeDkAVYwOeWYbeEFh4XtZ+6t3ySl3jxIVCbH04aiWp RqK7m6vRm6gDzKZ0t1AlMOrjQD/NOsZ8h/WZlkEWXie1k7/qxqetgPScl3KxtwhZCHli ZrNEcmdu8ddl8RhLPMy9ecAaBBBr4GqoBDJ4P80Rhu1kd7cLSr6JYFm8rIAcOHtwhkYl iNCw== X-Forwarded-Encrypted: i=1; AJvYcCXi8WxbN0qIoUE0cmXEhXSiGnCNaONqPO0e9tnLQAYU/s2j7kYKhJD90v3SBMkjbZZmo0YORvXwjZul@vger.kernel.org X-Gm-Message-State: AOJu0YzeAqVbWjF1QP5uJ5RfUVo1xE5Lr0ROiA/tGfjin9W1cpIbeOFg ZXrbFt3U0oc26Qf+Hi+kPWRcA52tjmEhQPu54U/iW3Vdmb3C7P1Xfud0AyVYDk4= X-Google-Smtp-Source: AGHT+IGQeeMMIWRhlzvEY447u73v0bcDYqggMB4NKbY4CT7iyrW8LbpZG4Gsc+7GkkDRX2iCA5iJHw== X-Received: by 2002:a17:903:35d0:b0:1fc:41c0:7a82 with SMTP id d9443c01a7336-204f9912733mr19656305ad.0.1724824220864; Tue, 27 Aug 2024 22:50:20 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-203855df0c4sm92092495ad.157.2024.08.27.22.50.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Aug 2024 22:50:20 -0700 (PDT) From: Charlie Jenkins Date: Tue, 27 Aug 2024 22:49:22 -0700 Subject: [PATCH 16/16] selftests/mm: Create MAP_BELOW_HINT test Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240827-patches-below_hint_mmap-v1-16-46ff2eb9022d@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=1906; i=charlie@rivosinc.com; h=from:subject:message-id; bh=bFLw7L4BlwG3KLICmNgvPIAvf1/5Sm3GeWEQAkx1eJA=; b=owGbwMvMwCHWx5hUnlvL8Y3xtFoSQ9q5XYnPPfbbPo8yeWL66+yxo/N6BS8nd1/7qNQhsOWpf 3tQ+KzTHaUsDGIcDLJiiiw81xqYW+/olx0VLZsAM4eVCWQIAxenAEzkdAYjwwau79apS3QeSJmm 67cdPe+1+9TsAsXmhc0Xrt4+G6VRe5aR4ekEGZPT2yyYhB/f/i4QYfZn696jodpGS1YWP+X48/d dEQMA X-Developer-Key: i=charlie@rivosinc.com; a=openpgp; fpr=7D834FF11B1D8387E61C776FFB10D1F27D6B1354 Add a selftest for MAP_BELOW_HINT that maps until it runs out of space below the hint address. Signed-off-by: Charlie Jenkins --- tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/map_below_hint.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index cfad627e8d94..4e2de85267b5 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -50,6 +50,7 @@ TEST_GEN_FILES += hugepage-shm TEST_GEN_FILES += hugepage-vmemmap TEST_GEN_FILES += khugepaged TEST_GEN_FILES += madv_populate +TEST_GEN_FILES += map_below_hint TEST_GEN_FILES += map_fixed_noreplace TEST_GEN_FILES += map_hugetlb TEST_GEN_FILES += map_populate diff --git a/tools/testing/selftests/mm/map_below_hint.c b/tools/testing/selftests/mm/map_below_hint.c new file mode 100644 index 000000000000..305274c5af49 --- /dev/null +++ b/tools/testing/selftests/mm/map_below_hint.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test the MAP_BELOW_HINT mmap flag. + */ +#include +#include "../kselftest.h" + +#define ADDR 0x1000000UL +#define LENGTH (ADDR / 100) + +#define MAP_BELOW_HINT 0x8000000 /* Not defined in all libc */ + +/* + * Map memory with MAP_BELOW_HINT until no memory left. Ensure that all returned + * addresses are below the hint. + */ +int main(int argc, char **argv) +{ + void *addr; + + do { + addr = mmap((void *)ADDR, LENGTH, MAP_ANONYMOUS, MAP_BELOW_HINT, -1, 0); + } while (addr == MAP_FAILED && (unsigned long)addr <= ADDR); + + if (addr != MAP_FAILED && (unsigned long)addr > ADDR) + ksft_exit_fail_msg("mmap returned address above hint with MAP_BELOW_HINT\n"); + + ksft_test_result_pass("MAP_BELOW_HINT works\n"); +}