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 13obj-y := $(patsubst %.o,%.hyp.o,$(obj-y)) 14extra-y := $(patsubst %.hyp.o,%.hyp.tmp.o,$(obj-y)) 15 16$(obj)/%.hyp.tmp.o: $(src)/%.c FORCE 17 $(call if_changed_rule,cc_o_c) 18$(obj)/%.hyp.tmp.o: $(src)/%.S FORCE 19 $(call if_changed_rule,as_o_S) 20$(obj)/%.hyp.o: $(obj)/%.hyp.tmp.o FORCE 21 $(call if_changed,hypcopy) 22 23# Disable reordering functions by GCC (enabled at -O2). 24# This pass puts functions into '.text.*' sections to aid the linker 25# in optimizing ELF layout. See HYPCOPY comment below for more info. 26ccflags-y += $(call cc-option,-fno-reorder-functions) 27 28# The HYPCOPY command uses `objcopy` to prefix all ELF symbol names 29# and relevant ELF section names to avoid clashes with VHE code/data. 30# 31# Hyp code is assumed to be in the '.text' section of the input object 32# files (with the exception of specialized sections such as 33# '.hyp.idmap.text'). This assumption may be broken by a compiler that 34# divides code into sections like '.text.unlikely' so as to optimize 35# ELF layout. HYPCOPY checks that no such sections exist in the input 36# using `objdump`, otherwise they would be linked together with other 37# kernel code and not memory-mapped correctly at runtime. 38quiet_cmd_hypcopy = HYPCOPY $@ 39 cmd_hypcopy = \ 40 if $(OBJDUMP) -h $< | grep -F '.text.'; then \ 41 echo "$@: function reordering not supported in nVHE hyp code" >&2; \ 42 /bin/false; \ 43 fi; \ 44 $(OBJCOPY) --prefix-symbols=__kvm_nvhe_ \ 45 --rename-section=.text=.hyp.text \ 46 $< $@ 47 48# Remove ftrace and Shadow Call Stack CFLAGS. 49# This is equivalent to the 'notrace' and '__noscs' annotations. 50KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) 51 52# KVM nVHE code is run at a different exception code with a different map, so 53# compiler instrumentation that inserts callbacks or checks into the code may 54# cause crashes. Just disable it. 55GCOV_PROFILE := n 56KASAN_SANITIZE := n 57UBSAN_SANITIZE := n 58KCOV_INSTRUMENT := n 59 60# Skip objtool checking for this directory because nVHE code is compiled with 61# non-standard build rules. 62OBJECT_FILES_NON_STANDARD := y 63