1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for the linux kernel. 4# 5 6always-$(KBUILD_BUILTIN) += vmlinux.lds 7 8CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE) 9 10ifdef CONFIG_FUNCTION_TRACER 11# Do not profile debug and lowlevel utilities 12CFLAGS_REMOVE_tsc.o = -pg 13CFLAGS_REMOVE_paravirt-spinlocks.o = -pg 14CFLAGS_REMOVE_pvclock.o = -pg 15CFLAGS_REMOVE_kvmclock.o = -pg 16CFLAGS_REMOVE_ftrace.o = -pg 17CFLAGS_REMOVE_early_printk.o = -pg 18CFLAGS_REMOVE_head64.o = -pg 19CFLAGS_REMOVE_head32.o = -pg 20CFLAGS_REMOVE_rethook.o = -pg 21endif 22 23KASAN_SANITIZE_head$(BITS).o := n 24KASAN_SANITIZE_dumpstack.o := n 25KASAN_SANITIZE_dumpstack_$(BITS).o := n 26KASAN_SANITIZE_stacktrace.o := n 27KASAN_SANITIZE_paravirt.o := n 28 29# With some compiler versions the generated code results in boot hangs, caused 30# by several compilation units. To be safe, disable all instrumentation. 31KCSAN_SANITIZE := n 32KMSAN_SANITIZE_head$(BITS).o := n 33KMSAN_SANITIZE_nmi.o := n 34 35# If instrumentation of the following files is enabled, boot hangs during 36# first second. 37KCOV_INSTRUMENT_head$(BITS).o := n 38# These are called from save_stack_trace() on debug paths, 39# and produce large amounts of uninteresting coverage. 40KCOV_INSTRUMENT_stacktrace.o := n 41KCOV_INSTRUMENT_dumpstack.o := n 42KCOV_INSTRUMENT_dumpstack_$(BITS).o := n 43KCOV_INSTRUMENT_unwind_orc.o := n 44KCOV_INSTRUMENT_unwind_frame.o := n 45KCOV_INSTRUMENT_unwind_guess.o := n 46 47# Disable KCOV to prevent crashes during kexec: load_segments() invalidates 48# the GS base, which KCOV relies on for per-CPU data. 49# 50# As KCOV and KEXEC compatibility should be preserved (e.g. syzkaller is 51# using it to collect crash dumps during kernel fuzzing), disabling 52# KCOV for KEXEC kernels is not an option. Selectively disabling KCOV 53# instrumentation for individual affected functions can be fragile, while 54# adding more checks to KCOV would slow it down. 55# 56# As a compromise solution, disable KCOV instrumentation for the whole 57# source code file. If its coverage is ever needed, other approaches 58# should be considered. 59KCOV_INSTRUMENT_machine_kexec_64.o := n 60 61CFLAGS_head32.o := -fno-stack-protector 62CFLAGS_head64.o := -fno-stack-protector 63CFLAGS_irq.o := -I $(src)/../include/asm/trace 64 65obj-y += head_$(BITS).o 66obj-y += head$(BITS).o 67obj-y += ebda.o 68obj-y += platform-quirks.o 69obj-y += process_$(BITS).o signal.o signal_$(BITS).o 70obj-y += traps.o idt.o irq.o irq_$(BITS).o dumpstack_$(BITS).o 71obj-y += time.o ioport.o dumpstack.o nmi.o 72obj-$(CONFIG_X86_FRED) += fred.o 73obj-$(CONFIG_MODIFY_LDT_SYSCALL) += ldt.o 74obj-$(CONFIG_X86_KERNEL_IBT) += ibt_selftest.o 75obj-y += setup.o x86_init.o i8259.o irqinit.o 76obj-$(CONFIG_JUMP_LABEL) += jump_label.o 77obj-$(CONFIG_IRQ_WORK) += irq_work.o 78obj-y += probe_roms.o 79obj-$(CONFIG_X86_32) += sys_ia32.o 80obj-$(CONFIG_IA32_EMULATION) += sys_ia32.o signal_32.o 81obj-$(CONFIG_X86_64) += sys_x86_64.o 82obj-$(CONFIG_X86_ESPFIX64) += espfix_64.o 83obj-$(CONFIG_SYSFS) += ksysfs.o 84obj-y += bootflag.o e820.o 85obj-y += pci-dma.o quirks.o kdebugfs.o 86obj-y += alternative.o i8253.o hw_breakpoint.o 87obj-y += tsc.o tsc_msr.o io_delay.o rtc.o 88obj-y += resource.o 89obj-y += irqflags.o 90obj-y += static_call.o 91 92obj-y += process.o 93obj-y += fpu/ 94obj-y += ptrace.o 95obj-$(CONFIG_X86_32) += tls.o 96obj-$(CONFIG_IA32_EMULATION) += tls.o 97obj-y += step.o 98obj-$(CONFIG_INTEL_TXT) += tboot.o 99obj-$(CONFIG_ISA_DMA_API) += i8237.o 100obj-y += stacktrace.o 101obj-y += cpu/ 102obj-y += acpi/ 103obj-y += reboot.o 104obj-$(CONFIG_X86_MSR) += msr.o 105obj-$(CONFIG_X86_CPUID) += cpuid.o 106obj-$(CONFIG_PCI) += early-quirks.o 107apm-y := apm_32.o 108obj-$(CONFIG_APM) += apm.o 109obj-$(CONFIG_SMP) += smp.o 110obj-$(CONFIG_SMP) += smpboot.o 111obj-$(CONFIG_X86_TSC) += tsc_sync.o 112obj-$(CONFIG_SMP) += setup_percpu.o 113obj-$(CONFIG_X86_MPPARSE) += mpparse.o 114obj-y += apic/ 115obj-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups_32.o 116obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o 117obj-$(CONFIG_FUNCTION_TRACER) += ftrace_$(BITS).o 118obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o 119obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o 120obj-$(CONFIG_X86_TSC) += trace_clock.o 121obj-$(CONFIG_TRACING) += trace.o 122obj-$(CONFIG_RETHOOK) += rethook.o 123obj-$(CONFIG_VMCORE_INFO) += vmcore_info_$(BITS).o 124obj-$(CONFIG_KEXEC_CORE) += machine_kexec_$(BITS).o 125obj-$(CONFIG_KEXEC_CORE) += relocate_kernel_$(BITS).o 126obj-$(CONFIG_KEXEC_FILE) += kexec-bzimage64.o 127obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o crash.o 128obj-y += kprobes/ 129obj-$(CONFIG_MODULES) += module.o 130obj-$(CONFIG_X86_32) += doublefault_32.o 131obj-$(CONFIG_KGDB) += kgdb.o 132obj-$(CONFIG_VM86) += vm86_32.o 133obj-$(CONFIG_EARLY_PRINTK) += early_printk.o 134 135obj-$(CONFIG_HPET_TIMER) += hpet.o 136 137obj-$(CONFIG_AMD_NB) += amd_nb.o 138obj-$(CONFIG_AMD_NODE) += amd_node.o 139obj-$(CONFIG_DEBUG_NMI_SELFTEST) += nmi_selftest.o 140 141obj-$(CONFIG_KVM_GUEST) += kvm.o kvmclock.o 142obj-$(CONFIG_PARAVIRT) += paravirt.o 143obj-$(CONFIG_PARAVIRT) += paravirt-spinlocks.o 144obj-$(CONFIG_PARAVIRT_CLOCK) += pvclock.o 145obj-$(CONFIG_X86_PMEM_LEGACY_DEVICE) += pmem.o 146 147obj-$(CONFIG_JAILHOUSE_GUEST) += jailhouse.o 148 149obj-$(CONFIG_EISA) += eisa.o 150obj-$(CONFIG_PCSPKR_PLATFORM) += pcspeaker.o 151 152obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o 153 154obj-$(CONFIG_OF) += devicetree.o 155obj-$(CONFIG_UPROBES) += uprobes.o 156 157obj-$(CONFIG_PERF_EVENTS) += perf_regs.o 158obj-$(CONFIG_SCHED_MC_PRIO) += itmt.o 159obj-$(CONFIG_X86_UMIP) += umip.o 160 161obj-$(CONFIG_UNWINDER_ORC) += unwind_orc.o 162obj-$(CONFIG_UNWINDER_FRAME_POINTER) += unwind_frame.o 163obj-$(CONFIG_UNWINDER_GUESS) += unwind_guess.o 164 165obj-$(CONFIG_CFI) += cfi.o 166 167obj-$(CONFIG_CALL_THUNKS) += callthunks.o 168 169obj-$(CONFIG_X86_CET) += cet.o 170 171obj-$(CONFIG_X86_USER_SHADOW_STACK) += shstk.o 172 173### 174# 64 bit specific files 175ifeq ($(CONFIG_X86_64),y) 176 obj-$(CONFIG_AUDIT) += audit_64.o 177 178 obj-$(CONFIG_GART_IOMMU) += amd_gart_64.o aperture_64.o 179 180 obj-$(CONFIG_MMCONF_FAM10H) += mmconf-fam10h_64.o 181 obj-y += vsmp_64.o 182endif 183