From nobody Wed Feb 11 06:30:43 2026 Received: from mail-pl1-f175.google.com (mail-pl1-f175.google.com [209.85.214.175]) (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 C55BA2741C0 for ; Sun, 2 Nov 2025 09:50:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.175 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762077008; cv=none; b=FuR0u7eV0cjgmS2aNhgLSPHIIBRrO7xyHIRAQrAE2OG99HpJAUA4++7HNq5CSFoaLcqsZC5/ViYoa+BtK2Nxe65vpChJNxDViinHzxEZ+kaobmfM2tlmd/d2bTpknT/oE8hguHhXrtPYsAY/tvJs8P8iIHf5DWxNhwxO1Uy02h0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762077008; c=relaxed/simple; bh=vFTFIe6I8r5QCp5mBI9sujzCZER4Rq/NgROeYBJU/sw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t8GvbNv6CuNl57ScUcq5d0CUGZrySZejHQD/uYbpMNHknpF585jRPRQcVy17haZhSEBW+4djbwjXt2EnczzjVOyPDYTg478PmwI0nVxrPtL894dnhPEYzAXqfUQ6n4JyafjWQVJ9FJzuLctBAxjYngtEcjuTn2RPgdio881Y5lg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=AZLPDNZ6; arc=none smtp.client-ip=209.85.214.175 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AZLPDNZ6" Received: by mail-pl1-f175.google.com with SMTP id d9443c01a7336-29555415c5fso14400865ad.1 for ; Sun, 02 Nov 2025 01:50:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1762077006; x=1762681806; darn=vger.kernel.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=Ph9zR1fvONGEfCwcooy4q6QCBsuZBG7EiBPZ3ZJSBIk=; b=AZLPDNZ6Sb4iLrTPxDBK0BKNxnGdm1+TdPurFqznSQ00qnW0MFkEqFrW9ZuAUhIKMa 9xZ9ya20Yxb/72hKquoXTCBVvdfMqxPN6Q7Tou9FqTFV8I5pD1VTKFcsETjtUbsJ/Koz oR4nxXzjjcmb9cZuTxKfsGZu0dc+P3lAoExr5c8gH3/ZYU9SD0DuR2rbZWgrwbRyT0wg cino+t/XvXdUNYwxITLIudH4jN8odWAbs8X1pOVGmqFWcvH2HvgYkuq+ELKDgqg1Edbr pbRySwANTRKzu7fUs2XdNYKwj37UrUBv4Ys7cVKI6K4qc4orVoWge4n0rtLZp20PmYMU q4Gg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762077006; x=1762681806; 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=Ph9zR1fvONGEfCwcooy4q6QCBsuZBG7EiBPZ3ZJSBIk=; b=Q/pUPp8eNb4Aw5P8S4j1AAZ5d6f9cCJBXyzU+VZuZMICjuAa0WH1ZBMDqhzLWVVr1d FBjJ9oDaE65qx0sOr5MF9WQLn2u1F7lHbmkPM5ag8wX3cjpIinH0O0G2yRYWrhF+kHQh mStJWPTWQ3MMhJrwjYWunL17fCvwko4xGaqMDKqGuCRMn8epXuwP2NPiX0+ARnlj1SxM +KliLvDO9U9L5UO5m6tXXD32SrU/xW/9LAclp78x6c0XUZJyUruBYcoqaUL1ZRXhH8zs 5GhaA14BbVsq+Ple5JZeyokHTfS+OIv3FpUIdT0RdueWvA/OhV16kz+HvHer8WfvbGRd mA4g== X-Forwarded-Encrypted: i=1; AJvYcCWO5a2Gbw5Hi5LBxLb13Cx2RIjECjOr1nXPNRXRpLnd755OujZ3umVrjKZ0VBMWXFkfjPUpEvONRPW1zDA=@vger.kernel.org X-Gm-Message-State: AOJu0YwFWiQSEK637BEdjCctzxj9OAh9LpzBZzjdz4mLNNSBOh6i59rH urKZlGrzpSTzg5cNu5jgqo/Xs8tp25TCLuRolfrht8VfNT/4p/Eb7t7z X-Gm-Gg: ASbGncsQM8XxkaS06fiwMvObc28IDXoCZz2p1jv1xBOILtGJHQ8r+EalGtcdV1mDWej B2wbQfXPSOmvim8DC42Bf7AtQndDMIF4QV8Pyrs2W7qdO2D8uAG4MW7iISy7DmNuaNGPkCjYOf6 LNpfJQNJ7WceH1KEIoCc8BMWNKI3nJuVkFDFFDOIyBbRmAPLt9wF6wJlORaBUus/ViQ9m0+avou TsPPw/qZqx6+I3EaaM8X2hqMcDOvmg0gHgRzzSUjHSV1IzXIM4m9TVLaPKCwZSzEGcvp63cmDjU DLXzceXBFCm+2lYxEbiZEMwuTLgFIQ3wooJd5+AulwJ+IVgIJ5uq/SZ5uVJBgEQsMFsAdvm7zjD Ks8rGxD8X0cTOhzCYSXRyunDdGSvFT8ocsQVsinVuhp+O9hixZdLnkLO0Db/gvKcuRtxHes4Pcn pa5W8Z4skSw6UHZf9/2I6dXTsO8vnq03fWYQaVLHnxQdChWBwWyPYssOpHN08RdsAu+wQ= X-Google-Smtp-Source: AGHT+IHUuWG7Ov5kBT/yNTPJH3xuxkjK4iSTaaCg1YaGK1t1FQzTnk7AwddqLgQ2HelyS4KrdoJ2gA== X-Received: by 2002:a17:903:2285:b0:290:2a14:2ed5 with SMTP id d9443c01a7336-2951a390655mr107666405ad.4.1762077006004; Sun, 02 Nov 2025 01:50:06 -0800 (PST) Received: from ikb-h07-29-noble.in.iijlab.net ([202.214.97.5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2958dd23059sm18342285ad.47.2025.11.02.01.50.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 Nov 2025 01:50:04 -0800 (PST) Received: by ikb-h07-29-noble.in.iijlab.net (Postfix, from userid 1010) id B73931123817; Sun, 2 Nov 2025 18:50:00 +0900 (JST) From: Hajime Tazaki To: linux-um@lists.infradead.org Cc: thehajime@gmail.com, ricarkol@google.com, Liam.Howlett@oracle.com, linux-kernel@vger.kernel.org Subject: [PATCH v12 13/13] um: nommu: plug nommu code into build system Date: Sun, 2 Nov 2025 18:49:38 +0900 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add nommu kernel for um build. defconfig is also provided. Signed-off-by: Hajime Tazaki Signed-off-by: Ricardo Koller --- arch/um/Kconfig | 14 ++++++- arch/um/configs/x86_64_nommu_defconfig | 54 ++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 2 deletions(-) create mode 100644 arch/um/configs/x86_64_nommu_defconfig diff --git a/arch/um/Kconfig b/arch/um/Kconfig index 097c6a6265ef..4907fd2db512 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -34,16 +34,19 @@ config UML select ARCH_SUPPORTS_LTO_CLANG_THIN select TRACE_IRQFLAGS_SUPPORT select TTY # Needed for line.c - select HAVE_ARCH_VMAP_STACK + select HAVE_ARCH_VMAP_STACK if MMU select HAVE_RUST select ARCH_HAS_UBSAN select HAVE_ARCH_TRACEHOOK select HAVE_SYSCALL_TRACEPOINTS select THREAD_INFO_IN_TASK select SPARSE_IRQ + select UACCESS_MEMCPY if !MMU + select GENERIC_STRNLEN_USER if !MMU + select GENERIC_STRNCPY_FROM_USER if !MMU =20 config MMU - bool + bool "MMU-based Paged Memory Management Support" if 64BIT default y =20 config UML_DMA_EMULATION @@ -225,8 +228,15 @@ config MAGIC_SYSRQ The keys are documented in . = Don't say Y unless you really know what this hack does. =20 +config ARCH_FORCE_MAX_ORDER + int "Order of maximal physically contiguous allocations" if EXPERT + default "10" if MMU + default "16" if !MMU + config KERNEL_STACK_ORDER int "Kernel stack size order" + default 3 if !MMU + range 3 10 if !MMU default 2 if 64BIT range 2 10 if 64BIT default 1 if !64BIT diff --git a/arch/um/configs/x86_64_nommu_defconfig b/arch/um/configs/x86_6= 4_nommu_defconfig new file mode 100644 index 000000000000..02cb87091c9f --- /dev/null +++ b/arch/um/configs/x86_64_nommu_defconfig @@ -0,0 +1,54 @@ +CONFIG_SYSVIPC=3Dy +CONFIG_POSIX_MQUEUE=3Dy +CONFIG_NO_HZ=3Dy +CONFIG_HIGH_RES_TIMERS=3Dy +CONFIG_BSD_PROCESS_ACCT=3Dy +CONFIG_IKCONFIG=3Dy +CONFIG_IKCONFIG_PROC=3Dy +CONFIG_LOG_BUF_SHIFT=3D14 +CONFIG_CGROUPS=3Dy +CONFIG_BLK_CGROUP=3Dy +CONFIG_CGROUP_SCHED=3Dy +CONFIG_CGROUP_DEVICE=3Dy +CONFIG_CGROUP_CPUACCT=3Dy +# CONFIG_PID_NS is not set +CONFIG_CC_OPTIMIZE_FOR_SIZE=3Dy +# CONFIG_MMU is not set +CONFIG_HOSTFS=3Dy +CONFIG_MAGIC_SYSRQ=3Dy +CONFIG_SSL=3Dy +CONFIG_NULL_CHAN=3Dy +CONFIG_PORT_CHAN=3Dy +CONFIG_PTY_CHAN=3Dy +CONFIG_TTY_CHAN=3Dy +CONFIG_CON_CHAN=3D"pts" +CONFIG_SSL_CHAN=3D"pts" +CONFIG_MODULES=3Dy +CONFIG_MODULE_UNLOAD=3Dy +CONFIG_IOSCHED_BFQ=3Dm +CONFIG_BINFMT_MISC=3Dm +CONFIG_NET=3Dy +CONFIG_PACKET=3Dy +CONFIG_UNIX=3Dy +CONFIG_INET=3Dy +CONFIG_DEVTMPFS=3Dy +CONFIG_DEVTMPFS_MOUNT=3Dy +CONFIG_BLK_DEV_UBD=3Dy +CONFIG_BLK_DEV_LOOP=3Dm +CONFIG_BLK_DEV_NBD=3Dm +CONFIG_DUMMY=3Dm +CONFIG_TUN=3Dm +CONFIG_PPP=3Dm +CONFIG_SLIP=3Dm +CONFIG_LEGACY_PTY_COUNT=3D32 +CONFIG_UML_RANDOM=3Dy +CONFIG_EXT4_FS=3Dy +CONFIG_QUOTA=3Dy +CONFIG_AUTOFS_FS=3Dm +CONFIG_ISO9660_FS=3Dm +CONFIG_JOLIET=3Dy +CONFIG_NLS=3Dy +CONFIG_DEBUG_KERNEL=3Dy +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=3Dy +CONFIG_FRAME_WARN=3D1024 +CONFIG_IPV6=3Dy --=20 2.43.0