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Message-ID: <5a59722b1cab960187461701df76d6f4d3f1249f.1745980082.git.thehajime@gmail.com> Date: Wed, 30 Apr 2025 13:27:18 +0900 From: Hajime Tazaki <thehajime@...il.com> To: linux-um@...ts.infradead.org Cc: thehajime@...il.com, ricarkol@...gle.com, Liam.Howlett@...cle.com, linux-kernel@...r.kernel.org Subject: [PATCH v8 12/12] um: nommu: plug nommu code into build system Add nommu kernel for um build. defconfig is also provided. Signed-off-by: Hajime Tazaki <thehajime@...il.com> Signed-off-by: Ricardo Koller <ricarkol@...gle.com> --- arch/um/Kconfig | 14 +++++- arch/um/configs/x86_64_nommu_defconfig | 64 ++++++++++++++++++++++++++ 2 files changed, 76 insertions(+), 2 deletions(-) create mode 100644 arch/um/configs/x86_64_nommu_defconfig diff --git a/arch/um/Kconfig b/arch/um/Kconfig index 79509c7f39de..84b2ee7129ae 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -31,14 +31,17 @@ 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 THREAD_INFO_IN_TASK + select UACCESS_MEMCPY if !MMU + select GENERIC_STRNLEN_USER if !MMU + select GENERIC_STRNCPY_FROM_USER if !MMU config MMU - bool + bool "MMU-based Paged Memory Management Support" if 64BIT default y config UML_DMA_EMULATION @@ -191,8 +194,15 @@ config MAGIC_SYSRQ The keys are documented in <file:Documentation/admin-guide/sysrq.rst>. Don't say Y unless you really know what this hack does. +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_64_nommu_defconfig new file mode 100644 index 000000000000..c2e0fb546987 --- /dev/null +++ b/arch/um/configs/x86_64_nommu_defconfig @@ -0,0 +1,64 @@ +CONFIG_SYSVIPC=y +CONFIG_POSIX_MQUEUE=y +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_BSD_PROCESS_ACCT=y +CONFIG_IKCONFIG=y +CONFIG_IKCONFIG_PROC=y +CONFIG_LOG_BUF_SHIFT=14 +CONFIG_CGROUPS=y +CONFIG_BLK_CGROUP=y +CONFIG_CGROUP_SCHED=y +CONFIG_CGROUP_DEVICE=y +CONFIG_CGROUP_CPUACCT=y +# CONFIG_PID_NS is not set +CONFIG_CC_OPTIMIZE_FOR_SIZE=y +# CONFIG_MMU is not set +CONFIG_HOSTFS=y +CONFIG_MAGIC_SYSRQ=y +CONFIG_SSL=y +CONFIG_NULL_CHAN=y +CONFIG_PORT_CHAN=y +CONFIG_PTY_CHAN=y +CONFIG_TTY_CHAN=y +CONFIG_CON_CHAN="pts" +CONFIG_SSL_CHAN="pts" +CONFIG_UML_SOUND=m +CONFIG_UML_NET=y +CONFIG_UML_NET_ETHERTAP=y +CONFIG_UML_NET_TUNTAP=y +CONFIG_UML_NET_SLIP=y +CONFIG_UML_NET_DAEMON=y +CONFIG_UML_NET_MCAST=y +CONFIG_UML_NET_SLIRP=y +CONFIG_MODULES=y +CONFIG_MODULE_UNLOAD=y +CONFIG_IOSCHED_BFQ=m +CONFIG_BINFMT_MISC=m +CONFIG_NET=y +CONFIG_PACKET=y +CONFIG_UNIX=y +CONFIG_INET=y +CONFIG_DEVTMPFS=y +CONFIG_DEVTMPFS_MOUNT=y +CONFIG_BLK_DEV_UBD=y +CONFIG_BLK_DEV_LOOP=m +CONFIG_BLK_DEV_NBD=m +CONFIG_DUMMY=m +CONFIG_TUN=m +CONFIG_PPP=m +CONFIG_SLIP=m +CONFIG_LEGACY_PTY_COUNT=32 +CONFIG_UML_RANDOM=y +CONFIG_SOUND=m +CONFIG_EXT4_FS=y +CONFIG_REISERFS_FS=y +CONFIG_QUOTA=y +CONFIG_AUTOFS_FS=m +CONFIG_ISO9660_FS=m +CONFIG_JOLIET=y +CONFIG_NLS=y +CONFIG_DEBUG_KERNEL=y +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y +CONFIG_FRAME_WARN=1024 +CONFIG_IPV6=y -- 2.43.0
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