From nobody Wed Sep 10 02:31:12 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E28DAC00528 for ; Thu, 27 Jul 2023 21:27:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231285AbjG0V1J (ORCPT ); Thu, 27 Jul 2023 17:27:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231328AbjG0V04 (ORCPT ); Thu, 27 Jul 2023 17:26:56 -0400 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71EBA1BC3 for ; Thu, 27 Jul 2023 14:26:54 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id d2e1a72fcca58-686fa3fc860so744670b3a.1 for ; Thu, 27 Jul 2023 14:26:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1690493214; x=1691098014; 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=uTyjwJ6/AkKvsr8TkfjD+hMv/+AP+4ITK7UKxmmUnHc=; b=Sg1Dwaa2hhNk+ptzUWDlhDziLQ7BYdhCwNr7XG+A7ALHhZ6cxngoMChZZks5hfTrMs MphNFVoom+/MTDIlLL3A0DgafopRx4dG9XeqhwbGAxXetU1et0fbhYOxFtD5wZX4Un9f MxohIFvJ3Bx15Dy3QaN+juClp/XtolsHoBP7WewspMul+5TyY3LFsvYFsa+p+F7dASAs 8KzKQ7sAuXE9YTKFSYoI2gSyDYJbuSzFCX3R0xBHM0kWH/4hzGeWQQwKjUtC3LPWQUqZ hvRPDa8Gi9VIS6DsUtg8Guw7ADzJjJpxUC95YnIXmy9ctQprbV7s12dIRS4wmTWwrHqA LhZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690493214; x=1691098014; 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=uTyjwJ6/AkKvsr8TkfjD+hMv/+AP+4ITK7UKxmmUnHc=; b=SnO7YBeU6RiKe9FkkdSkwIedM6Q3h28fPMs9uqVIpKGYgk/L19/3t6IIBzNVzEA3Cj 2LOvilobdKyE695ZfZEH7KVcYZ1IlbSmXeq0ZnSyFzvjmMwLao/rS0QnVmNjYltFmgj/ 9e699EJbX7ezH71Lo8zt2brcs7h+00B46gI5rxcf5Dpn1t5MrgJVaZiE15aIy9xCv+On v+lewIhWPJTQaj9UI1CSiFr5OUYFys2nTXDB1zHASCr+u6XnvH5bdZJbsECOTiIs/yc7 4+KgjzPDRuS2J6eiegCkMQ4HHus6Q2uVLALudfgbDiGhRkrrPa9ILwg8PhUKXqHVtKb4 K4dw== X-Gm-Message-State: ABy/qLZLP72Hdc/jpzNTnZQ4d0uM2dMnVG7Ck2A1rY/M7zwteT5u74Nm Ac63U+u7YcwKBWBUHXJtgBmrzA== X-Google-Smtp-Source: APBJJlFFWYLTEbKLA8egXy5s3u+cXeAgzBIdat1e55NXRuoAca70SNRbD9GZigSou7wX9EmZTVDckA== X-Received: by 2002:a05:6a20:3d21:b0:134:f040:e967 with SMTP id y33-20020a056a203d2100b00134f040e967mr255099pzi.61.1690493213881; Thu, 27 Jul 2023 14:26:53 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id c5-20020aa78c05000000b00682562b1549sm1912312pfd.24.2023.07.27.14.26.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 14:26:53 -0700 (PDT) From: Charlie Jenkins To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: charlie@rivosinc.com, conor@kernel.org, paul.walmsley@sifive.com, palmer@rivosinc.com, aou@eecs.berkeley.edu, anup@brainfault.org, konstantin@linuxfoundation.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, mick@ics.forth.gr, jrtc27@jrtc27.com, rdunlap@infradead.org, alexghiti@rivosinc.com Subject: [PATCH v8 2/4] RISC-V: mm: Add tests for RISC-V mm Date: Thu, 27 Jul 2023 14:26:27 -0700 Message-ID: <20230727212647.4182407-3-charlie@rivosinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230727212647.4182407-1-charlie@rivosinc.com> References: <20230727212647.4182407-1-charlie@rivosinc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add tests that enforce mmap hint address behavior. mmap should default to sv48. mmap will provide an address at the highest address space that can fit into the hint address, unless the hint address is less than sv39 and not 0, then it will return a sv39 address. These tests are split into two files: mmap_default.c and mmap_bottomup.c because a new process must be exec'd in order to change the mmap layout. The run_mmap.sh script sets the stack to be unlimited for the mmap_bottomup.c test which triggers a bottomup layout. Signed-off-by: Charlie Jenkins --- tools/testing/selftests/riscv/Makefile | 2 +- tools/testing/selftests/riscv/mm/.gitignore | 2 + tools/testing/selftests/riscv/mm/Makefile | 15 +++++ .../riscv/mm/testcases/mmap_bottomup.c | 35 ++++++++++ .../riscv/mm/testcases/mmap_default.c | 35 ++++++++++ .../selftests/riscv/mm/testcases/mmap_test.h | 64 +++++++++++++++++++ .../selftests/riscv/mm/testcases/run_mmap.sh | 12 ++++ 7 files changed, 164 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/riscv/mm/.gitignore create mode 100644 tools/testing/selftests/riscv/mm/Makefile create mode 100644 tools/testing/selftests/riscv/mm/testcases/mmap_bottomu= p.c create mode 100644 tools/testing/selftests/riscv/mm/testcases/mmap_default= .c create mode 100644 tools/testing/selftests/riscv/mm/testcases/mmap_test.h create mode 100755 tools/testing/selftests/riscv/mm/testcases/run_mmap.sh diff --git a/tools/testing/selftests/riscv/Makefile b/tools/testing/selftes= ts/riscv/Makefile index f4b3d5c9af5b..4a9ff515a3a0 100644 --- a/tools/testing/selftests/riscv/Makefile +++ b/tools/testing/selftests/riscv/Makefile @@ -5,7 +5,7 @@ ARCH ?=3D $(shell uname -m 2>/dev/null || echo not) =20 ifneq (,$(filter $(ARCH),riscv)) -RISCV_SUBTARGETS ?=3D hwprobe vector +RISCV_SUBTARGETS ?=3D hwprobe vector mm else RISCV_SUBTARGETS :=3D endif diff --git a/tools/testing/selftests/riscv/mm/.gitignore b/tools/testing/se= lftests/riscv/mm/.gitignore new file mode 100644 index 000000000000..5c2c57cb950c --- /dev/null +++ b/tools/testing/selftests/riscv/mm/.gitignore @@ -0,0 +1,2 @@ +mmap_bottomup +mmap_default diff --git a/tools/testing/selftests/riscv/mm/Makefile b/tools/testing/self= tests/riscv/mm/Makefile new file mode 100644 index 000000000000..11e0f0568923 --- /dev/null +++ b/tools/testing/selftests/riscv/mm/Makefile @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2021 ARM Limited +# Originally tools/testing/arm64/abi/Makefile + +# Additional include paths needed by kselftest.h and local headers +CFLAGS +=3D -D_GNU_SOURCE -std=3Dgnu99 -I. + +TEST_GEN_FILES :=3D testcases/mmap_default testcases/mmap_bottomup + +TEST_PROGS :=3D testcases/run_mmap.sh + +include ../../lib.mk + +$(OUTPUT)/mm: testcases/mmap_default.c testcases/mmap_bottomup.c testcases= /mmap_tests.h + $(CC) -o$@ $(CFLAGS) $(LDFLAGS) $^ diff --git a/tools/testing/selftests/riscv/mm/testcases/mmap_bottomup.c b/t= ools/testing/selftests/riscv/mm/testcases/mmap_bottomup.c new file mode 100644 index 000000000000..b29379f7e478 --- /dev/null +++ b/tools/testing/selftests/riscv/mm/testcases/mmap_bottomup.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include + +#include "../../kselftest_harness.h" + +TEST(infinite_rlimit) +{ +// Only works on 64 bit +#if __riscv_xlen =3D=3D 64 + struct addresses mmap_addresses; + + EXPECT_EQ(BOTTOM_UP, memory_layout()); + + do_mmaps(&mmap_addresses); + + EXPECT_NE(MAP_FAILED, mmap_addresses.no_hint); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_37_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_38_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_46_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_47_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_55_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_56_addr); + + EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.no_hint); + EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_37_addr); + EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_38_addr); + EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_46_addr); + EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_47_addr); + EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_55_addr); + EXPECT_GT(1UL << 56, (unsigned long)mmap_addresses.on_56_addr); +#endif +} + +TEST_HARNESS_MAIN diff --git a/tools/testing/selftests/riscv/mm/testcases/mmap_default.c b/to= ols/testing/selftests/riscv/mm/testcases/mmap_default.c new file mode 100644 index 000000000000..d1accb91b726 --- /dev/null +++ b/tools/testing/selftests/riscv/mm/testcases/mmap_default.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include + +#include "../../kselftest_harness.h" + +TEST(default_rlimit) +{ +// Only works on 64 bit +#if __riscv_xlen =3D=3D 64 + struct addresses mmap_addresses; + + EXPECT_EQ(TOP_DOWN, memory_layout()); + + do_mmaps(&mmap_addresses); + + EXPECT_NE(MAP_FAILED, mmap_addresses.no_hint); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_37_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_38_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_46_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_47_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_55_addr); + EXPECT_NE(MAP_FAILED, mmap_addresses.on_56_addr); + + EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.no_hint); + EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_37_addr); + EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_38_addr); + EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_46_addr); + EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_47_addr); + EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_55_addr); + EXPECT_GT(1UL << 56, (unsigned long)mmap_addresses.on_56_addr); +#endif +} + +TEST_HARNESS_MAIN diff --git a/tools/testing/selftests/riscv/mm/testcases/mmap_test.h b/tools= /testing/selftests/riscv/mm/testcases/mmap_test.h new file mode 100644 index 000000000000..98a892de5d19 --- /dev/null +++ b/tools/testing/selftests/riscv/mm/testcases/mmap_test.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _TESTCASES_MMAP_TEST_H +#define _TESTCASES_MMAP_TEST_H +#include +#include +#include + +#define TOP_DOWN 0 +#define BOTTOM_UP 1 + +struct addresses { + int *no_hint; + int *on_37_addr; + int *on_38_addr; + int *on_46_addr; + int *on_47_addr; + int *on_55_addr; + int *on_56_addr; +}; + +void do_mmaps(struct addresses *mmap_addresses) +{ + /* + * Place all of the hint addresses on the boundaries of mmap + * sv39, sv48, sv57 + * User addresses end at 1<<38, 1<<47, 1<<56 respectively + */ + void *on_37_bits =3D (void *)(1UL << 37); + void *on_38_bits =3D (void *)(1UL << 38); + void *on_46_bits =3D (void *)(1UL << 46); + void *on_47_bits =3D (void *)(1UL << 47); + void *on_55_bits =3D (void *)(1UL << 55); + void *on_56_bits =3D (void *)(1UL << 56); + + int prot =3D PROT_READ | PROT_WRITE; + int flags =3D MAP_PRIVATE | MAP_ANONYMOUS; + + mmap_addresses->no_hint =3D + mmap(NULL, 5 * sizeof(int), prot, flags, 0, 0); + mmap_addresses->on_37_addr =3D + mmap(on_37_bits, 5 * sizeof(int), prot, flags, 0, 0); + mmap_addresses->on_38_addr =3D + mmap(on_38_bits, 5 * sizeof(int), prot, flags, 0, 0); + mmap_addresses->on_46_addr =3D + mmap(on_46_bits, 5 * sizeof(int), prot, flags, 0, 0); + mmap_addresses->on_47_addr =3D + mmap(on_47_bits, 5 * sizeof(int), prot, flags, 0, 0); + mmap_addresses->on_55_addr =3D + mmap(on_55_bits, 5 * sizeof(int), prot, flags, 0, 0); + mmap_addresses->on_56_addr =3D + mmap(on_56_bits, 5 * sizeof(int), prot, flags, 0, 0); +} + +int memory_layout(void) +{ + int prot =3D PROT_READ | PROT_WRITE; + int flags =3D MAP_PRIVATE | MAP_ANONYMOUS; + + void *value1 =3D mmap(NULL, sizeof(int), prot, flags, 0, 0); + void *value2 =3D mmap(NULL, sizeof(int), prot, flags, 0, 0); + + return value2 > value1; +} +#endif /* _TESTCASES_MMAP_TEST_H */ diff --git a/tools/testing/selftests/riscv/mm/testcases/run_mmap.sh b/tools= /testing/selftests/riscv/mm/testcases/run_mmap.sh new file mode 100755 index 000000000000..ca5ad7c48bad --- /dev/null +++ b/tools/testing/selftests/riscv/mm/testcases/run_mmap.sh @@ -0,0 +1,12 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +original_stack_limit=3D$(ulimit -s) + +./mmap_default + +# Force mmap_bottomup to be ran with bottomup memory due to +# the unlimited stack +ulimit -s unlimited +./mmap_bottomup +ulimit -s $original_stack_limit --=20 2.41.0