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