1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for Kernel-based Virtual Machine module, HYP/nVHE part 4# 5 6asflags-y := -D__KVM_NVHE_HYPERVISOR__ 7ccflags-y := -D__KVM_NVHE_HYPERVISOR__ 8 9lib-objs := clear_page.o copy_page.o memcpy.o memset.o 10lib-objs := $(addprefix ../../../lib/, $(lib-objs)) 11 12obj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o host.o hyp-main.o 13obj-y += ../vgic-v3-sr.o ../aarch32.o ../vgic-v2-cpuif-proxy.o ../entry.o \ 14 ../fpsimd.o ../hyp-entry.o 15obj-y += $(lib-objs) 16 17## 18## Build rules for compiling nVHE hyp code 19## Output of this folder is `kvm_nvhe.o`, a partially linked object 20## file containing all nVHE hyp code and data. 21## 22 23hyp-obj := $(patsubst %.o,%.nvhe.o,$(obj-y)) 24obj-y := kvm_nvhe.o 25extra-y := $(hyp-obj) kvm_nvhe.tmp.o hyp.lds 26 27# 1) Compile all source files to `.nvhe.o` object files. The file extension 28# avoids file name clashes for files shared with VHE. 29$(obj)/%.nvhe.o: $(src)/%.c FORCE 30 $(call if_changed_rule,cc_o_c) 31$(obj)/%.nvhe.o: $(src)/%.S FORCE 32 $(call if_changed_rule,as_o_S) 33 34# 2) Compile linker script. 35$(obj)/hyp.lds: $(src)/hyp.lds.S FORCE 36 $(call if_changed_dep,cpp_lds_S) 37 38# 3) Partially link all '.nvhe.o' files and apply the linker script. 39# Prefixes names of ELF sections with '.hyp', eg. '.hyp.text'. 40# Note: The following rule assumes that the 'ld' rule puts LDFLAGS before 41# the list of dependencies to form '-T $(obj)/hyp.lds'. This is to 42# keep the dependency on the target while avoiding an error from 43# GNU ld if the linker script is passed to it twice. 44LDFLAGS_kvm_nvhe.tmp.o := -r -T 45$(obj)/kvm_nvhe.tmp.o: $(obj)/hyp.lds $(addprefix $(obj)/,$(hyp-obj)) FORCE 46 $(call if_changed,ld) 47 48# 4) Produce the final 'kvm_nvhe.o', ready to be linked into 'vmlinux'. 49# Prefixes names of ELF symbols with '__kvm_nvhe_'. 50$(obj)/kvm_nvhe.o: $(obj)/kvm_nvhe.tmp.o FORCE 51 $(call if_changed,hypcopy) 52 53# The HYPCOPY command uses `objcopy` to prefix all ELF symbol names 54# to avoid clashes with VHE code/data. 55quiet_cmd_hypcopy = HYPCOPY $@ 56 cmd_hypcopy = $(OBJCOPY) --prefix-symbols=__kvm_nvhe_ $< $@ 57 58# Remove ftrace, Shadow Call Stack, and CFI CFLAGS. 59# This is equivalent to the 'notrace', '__noscs', and '__nocfi' annotations. 60KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI), $(KBUILD_CFLAGS)) 61 62# KVM nVHE code is run at a different exception code with a different map, so 63# compiler instrumentation that inserts callbacks or checks into the code may 64# cause crashes. Just disable it. 65GCOV_PROFILE := n 66KASAN_SANITIZE := n 67UBSAN_SANITIZE := n 68KCOV_INSTRUMENT := n 69 70# Skip objtool checking for this directory because nVHE code is compiled with 71# non-standard build rules. 72OBJECT_FILES_NON_STANDARD := y 73