xref: /openbmc/linux/kernel/Makefile (revision 0d456bad) 
1#
2# Makefile for the linux kernel.
3#
4
5obj-y     = fork.o exec_domain.o panic.o printk.o \
6	    cpu.o exit.o itimer.o time.o softirq.o resource.o \
7	    sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
8	    signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
9	    rcupdate.o extable.o params.o posix-timers.o \
10	    kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
11	    hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
12	    notifier.o ksysfs.o cred.o \
13	    async.o range.o groups.o lglock.o smpboot.o
14
15ifdef CONFIG_FUNCTION_TRACER
16# Do not trace debug files and internal ftrace files
17CFLAGS_REMOVE_lockdep.o = -pg
18CFLAGS_REMOVE_lockdep_proc.o = -pg
19CFLAGS_REMOVE_mutex-debug.o = -pg
20CFLAGS_REMOVE_rtmutex-debug.o = -pg
21CFLAGS_REMOVE_cgroup-debug.o = -pg
22CFLAGS_REMOVE_irq_work.o = -pg
23endif
24
25obj-y += sched/
26obj-y += power/
27
28ifeq ($(CONFIG_CHECKPOINT_RESTORE),y)
29obj-$(CONFIG_X86) += kcmp.o
30endif
31obj-$(CONFIG_FREEZER) += freezer.o
32obj-$(CONFIG_PROFILING) += profile.o
33obj-$(CONFIG_STACKTRACE) += stacktrace.o
34obj-y += time/
35obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o
36obj-$(CONFIG_LOCKDEP) += lockdep.o
37ifeq ($(CONFIG_PROC_FS),y)
38obj-$(CONFIG_LOCKDEP) += lockdep_proc.o
39endif
40obj-$(CONFIG_FUTEX) += futex.o
41ifeq ($(CONFIG_COMPAT),y)
42obj-$(CONFIG_FUTEX) += futex_compat.o
43endif
44obj-$(CONFIG_RT_MUTEXES) += rtmutex.o
45obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
46obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
47obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
48obj-$(CONFIG_SMP) += smp.o
49ifneq ($(CONFIG_SMP),y)
50obj-y += up.o
51endif
52obj-$(CONFIG_SMP) += spinlock.o
53obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
54obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
55obj-$(CONFIG_UID16) += uid16.o
56obj-$(CONFIG_MODULES) += module.o
57obj-$(CONFIG_MODULE_SIG) += module_signing.o modsign_pubkey.o
58obj-$(CONFIG_KALLSYMS) += kallsyms.o
59obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
60obj-$(CONFIG_KEXEC) += kexec.o
61obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
62obj-$(CONFIG_COMPAT) += compat.o
63obj-$(CONFIG_CGROUPS) += cgroup.o
64obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
65obj-$(CONFIG_CPUSETS) += cpuset.o
66obj-$(CONFIG_UTS_NS) += utsname.o
67obj-$(CONFIG_USER_NS) += user_namespace.o
68obj-$(CONFIG_PID_NS) += pid_namespace.o
69obj-$(CONFIG_IKCONFIG) += configs.o
70obj-$(CONFIG_RESOURCE_COUNTERS) += res_counter.o
71obj-$(CONFIG_SMP) += stop_machine.o
72obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
73obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
74obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
75obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
76obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
77obj-$(CONFIG_GCOV_KERNEL) += gcov/
78obj-$(CONFIG_KPROBES) += kprobes.o
79obj-$(CONFIG_KGDB) += debug/
80obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
81obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
82obj-$(CONFIG_GENERIC_HARDIRQS) += irq/
83obj-$(CONFIG_SECCOMP) += seccomp.o
84obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
85obj-$(CONFIG_TREE_RCU) += rcutree.o
86obj-$(CONFIG_TREE_PREEMPT_RCU) += rcutree.o
87obj-$(CONFIG_TREE_RCU_TRACE) += rcutree_trace.o
88obj-$(CONFIG_TINY_RCU) += rcutiny.o
89obj-$(CONFIG_TINY_PREEMPT_RCU) += rcutiny.o
90obj-$(CONFIG_RELAY) += relay.o
91obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
92obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
93obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
94obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
95obj-$(CONFIG_LATENCYTOP) += latencytop.o
96obj-$(CONFIG_BINFMT_ELF) += elfcore.o
97obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
98obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
99obj-$(CONFIG_FUNCTION_TRACER) += trace/
100obj-$(CONFIG_TRACING) += trace/
101obj-$(CONFIG_TRACE_CLOCK) += trace/
102obj-$(CONFIG_RING_BUFFER) += trace/
103obj-$(CONFIG_TRACEPOINTS) += trace/
104obj-$(CONFIG_IRQ_WORK) += irq_work.o
105obj-$(CONFIG_CPU_PM) += cpu_pm.o
106
107obj-$(CONFIG_PERF_EVENTS) += events/
108
109obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
110obj-$(CONFIG_PADATA) += padata.o
111obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
112obj-$(CONFIG_JUMP_LABEL) += jump_label.o
113obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
114
115$(obj)/configs.o: $(obj)/config_data.h
116
117# config_data.h contains the same information as ikconfig.h but gzipped.
118# Info from config_data can be extracted from /proc/config*
119targets += config_data.gz
120$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
121	$(call if_changed,gzip)
122
123      filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;")
124targets += config_data.h
125$(obj)/config_data.h: $(obj)/config_data.gz FORCE
126	$(call filechk,ikconfiggz)
127
128$(obj)/time.o: $(obj)/timeconst.h
129
130quiet_cmd_timeconst  = TIMEC   $@
131      cmd_timeconst  = $(PERL) $< $(CONFIG_HZ) > $@
132targets += timeconst.h
133$(obj)/timeconst.h: $(src)/timeconst.pl FORCE
134	$(call if_changed,timeconst)
135
136ifeq ($(CONFIG_MODULE_SIG),y)
137#
138# Pull the signing certificate and any extra certificates into the kernel
139#
140extra_certificates:
141	touch $@
142
143kernel/modsign_pubkey.o: signing_key.x509 extra_certificates
144
145###############################################################################
146#
147# If module signing is requested, say by allyesconfig, but a key has not been
148# supplied, then one will need to be generated to make sure the build does not
149# fail and that the kernel may be used afterwards.
150#
151###############################################################################
152sign_key_with_hash :=
153ifeq ($(CONFIG_MODULE_SIG_SHA1),y)
154sign_key_with_hash := -sha1
155endif
156ifeq ($(CONFIG_MODULE_SIG_SHA224),y)
157sign_key_with_hash := -sha224
158endif
159ifeq ($(CONFIG_MODULE_SIG_SHA256),y)
160sign_key_with_hash := -sha256
161endif
162ifeq ($(CONFIG_MODULE_SIG_SHA384),y)
163sign_key_with_hash := -sha384
164endif
165ifeq ($(CONFIG_MODULE_SIG_SHA512),y)
166sign_key_with_hash := -sha512
167endif
168ifeq ($(sign_key_with_hash),)
169$(error Could not determine digest type to use from kernel config)
170endif
171
172signing_key.priv signing_key.x509: x509.genkey
173	@echo "###"
174	@echo "### Now generating an X.509 key pair to be used for signing modules."
175	@echo "###"
176	@echo "### If this takes a long time, you might wish to run rngd in the"
177	@echo "### background to keep the supply of entropy topped up.  It"
178	@echo "### needs to be run as root, and uses a hardware random"
179	@echo "### number generator if one is available."
180	@echo "###"
181	openssl req -new -nodes -utf8 $(sign_key_with_hash) -days 36500 -batch \
182		-x509 -config x509.genkey \
183		-outform DER -out signing_key.x509 \
184		-keyout signing_key.priv
185	@echo "###"
186	@echo "### Key pair generated."
187	@echo "###"
188
189x509.genkey:
190	@echo Generating X.509 key generation config
191	@echo  >x509.genkey "[ req ]"
192	@echo >>x509.genkey "default_bits = 4096"
193	@echo >>x509.genkey "distinguished_name = req_distinguished_name"
194	@echo >>x509.genkey "prompt = no"
195	@echo >>x509.genkey "string_mask = utf8only"
196	@echo >>x509.genkey "x509_extensions = myexts"
197	@echo >>x509.genkey
198	@echo >>x509.genkey "[ req_distinguished_name ]"
199	@echo >>x509.genkey "O = Magrathea"
200	@echo >>x509.genkey "CN = Glacier signing key"
201	@echo >>x509.genkey "emailAddress = slartibartfast@magrathea.h2g2"
202	@echo >>x509.genkey
203	@echo >>x509.genkey "[ myexts ]"
204	@echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
205	@echo >>x509.genkey "keyUsage=digitalSignature"
206	@echo >>x509.genkey "subjectKeyIdentifier=hash"
207	@echo >>x509.genkey "authorityKeyIdentifier=keyid"
208endif
209