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