1e4ee5135d
Add initial symmetric multi-processing (SMP) support to UML. With this support enabled, users can tell UML to start multiple virtual processors, each represented as a separate host thread. In UML, kthreads and normal threads (when running in kernel mode) can be scheduled and executed simultaneously on different virtual processors. However, the userspace code of normal threads still runs within their respective single-threaded stubs. That is, SMP support is currently available both within the kernel and across different processes, but still remains limited within threads of the same process in userspace. Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com> Link: https://patch.msgid.link/20251027001815.1666872-6-tiwei.bie@linux.dev Signed-off-by: Johannes Berg <johannes.berg@intel.com>
66 lines
2.1 KiB
Makefile
66 lines
2.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux,intel}.com)
|
|
#
|
|
|
|
# Don't instrument UML-specific code; without this, we may crash when
|
|
# accessing the instrumentation buffer for the first time from the
|
|
# kernel.
|
|
KCOV_INSTRUMENT := n
|
|
|
|
CPPFLAGS_vmlinux.lds := -DSTART=$(LDS_START) \
|
|
-DELF_ARCH=$(LDS_ELF_ARCH) \
|
|
-DELF_FORMAT=$(LDS_ELF_FORMAT) \
|
|
$(LDS_EXTRA)
|
|
always-$(KBUILD_BUILTIN) := vmlinux.lds
|
|
|
|
obj-y = config.o exec.o exitcode.o irq.o ksyms.o mem.o \
|
|
physmem.o process.o ptrace.o reboot.o sigio.o \
|
|
signal.o sysrq.o time.o tlb.o trap.o \
|
|
um_arch.o umid.o kmsg_dump.o capflags.o skas/
|
|
obj-y += load_file.o
|
|
|
|
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
|
|
obj-$(CONFIG_GPROF) += gprof_syms.o
|
|
obj-$(CONFIG_OF) += dtb.o
|
|
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
|
|
obj-$(CONFIG_STACKTRACE) += stacktrace.o
|
|
obj-$(CONFIG_SMP) += smp.o
|
|
|
|
USER_OBJS := config.o
|
|
|
|
include $(srctree)/arch/um/scripts/Makefile.rules
|
|
|
|
targets := config.c config.tmp capflags.c
|
|
|
|
# Be careful with the below Sed code - sed is pitfall-rich!
|
|
# We use sed to lower build requirements, for "embedded" builders for instance.
|
|
|
|
$(obj)/config.tmp: $(objtree)/.config FORCE
|
|
$(call if_changed,quote1)
|
|
|
|
quiet_cmd_quote1 = QUOTE $@
|
|
cmd_quote1 = sed -e 's/"/\\"/g' -e 's/^/"/' -e 's/$$/\\n",/' \
|
|
$< > $@
|
|
|
|
$(obj)/config.c: $(src)/config.c.in $(obj)/config.tmp FORCE
|
|
$(call if_changed,quote2)
|
|
|
|
quiet_cmd_mkcapflags = MKCAP $@
|
|
cmd_mkcapflags = $(CONFIG_SHELL) $(src)/../../x86/kernel/cpu/mkcapflags.sh $@ $^
|
|
|
|
cpufeature = $(src)/../../x86/include/asm/cpufeatures.h
|
|
vmxfeature = $(src)/../../x86/include/asm/vmxfeatures.h
|
|
|
|
$(obj)/capflags.c: $(cpufeature) $(vmxfeature) $(src)/../../x86/kernel/cpu/mkcapflags.sh FORCE
|
|
$(call if_changed,mkcapflags)
|
|
|
|
quiet_cmd_quote2 = QUOTE $@
|
|
cmd_quote2 = sed -e '/CONFIG/{' \
|
|
-e 's/"CONFIG"//' \
|
|
-e 'r $(obj)/config.tmp' \
|
|
-e 'a \' \
|
|
-e '""' \
|
|
-e '}' \
|
|
$< > $@
|