176217129SDavid Brazdil# SPDX-License-Identifier: GPL-2.0 276217129SDavid Brazdil# 376217129SDavid Brazdil# Makefile for Kernel-based Virtual Machine module, HYP/nVHE part 476217129SDavid Brazdil# 576217129SDavid Brazdil 676217129SDavid Brazdilasflags-y := -D__KVM_NVHE_HYPERVISOR__ 776217129SDavid Brazdilccflags-y := -D__KVM_NVHE_HYPERVISOR__ 876217129SDavid Brazdil 9c04dd455SDavid Brazdilobj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o 10c04dd455SDavid Brazdilobj-y += ../vgic-v3-sr.o ../aarch32.o ../vgic-v2-cpuif-proxy.o ../entry.o \ 11c04dd455SDavid Brazdil ../fpsimd.o ../hyp-entry.o 1276217129SDavid Brazdil 13*ab25464bSDavid Brazdil## 14*ab25464bSDavid Brazdil## Build rules for compiling nVHE hyp code 15*ab25464bSDavid Brazdil## Output of this folder is `kvm_nvhe.o`, a partially linked object 16*ab25464bSDavid Brazdil## file containing all nVHE hyp code and data. 17*ab25464bSDavid Brazdil## 1876217129SDavid Brazdil 19*ab25464bSDavid Brazdilhyp-obj := $(patsubst %.o,%.nvhe.o,$(obj-y)) 20*ab25464bSDavid Brazdilobj-y := kvm_nvhe.o 21*ab25464bSDavid Brazdilextra-y := $(hyp-obj) kvm_nvhe.tmp.o hyp.lds 22*ab25464bSDavid Brazdil 23*ab25464bSDavid Brazdil# 1) Compile all source files to `.nvhe.o` object files. The file extension 24*ab25464bSDavid Brazdil# avoids file name clashes for files shared with VHE. 25*ab25464bSDavid Brazdil$(obj)/%.nvhe.o: $(src)/%.c FORCE 2676217129SDavid Brazdil $(call if_changed_rule,cc_o_c) 27*ab25464bSDavid Brazdil$(obj)/%.nvhe.o: $(src)/%.S FORCE 2876217129SDavid Brazdil $(call if_changed_rule,as_o_S) 29*ab25464bSDavid Brazdil 30*ab25464bSDavid Brazdil# 2) Compile linker script. 31*ab25464bSDavid Brazdil$(obj)/hyp.lds: $(src)/hyp.lds.S FORCE 32*ab25464bSDavid Brazdil $(call if_changed_dep,cpp_lds_S) 33*ab25464bSDavid Brazdil 34*ab25464bSDavid Brazdil# 3) Partially link all '.nvhe.o' files and apply the linker script. 35*ab25464bSDavid Brazdil# Prefixes names of ELF sections with '.hyp', eg. '.hyp.text'. 36*ab25464bSDavid Brazdil# Note: The following rule assumes that the 'ld' rule puts LDFLAGS before 37*ab25464bSDavid Brazdil# the list of dependencies to form '-T $(obj)/hyp.lds'. This is to 38*ab25464bSDavid Brazdil# keep the dependency on the target while avoiding an error from 39*ab25464bSDavid Brazdil# GNU ld if the linker script is passed to it twice. 40*ab25464bSDavid BrazdilLDFLAGS_kvm_nvhe.tmp.o := -r -T 41*ab25464bSDavid Brazdil$(obj)/kvm_nvhe.tmp.o: $(obj)/hyp.lds $(addprefix $(obj)/,$(hyp-obj)) FORCE 42*ab25464bSDavid Brazdil $(call if_changed,ld) 43*ab25464bSDavid Brazdil 44*ab25464bSDavid Brazdil# 4) Produce the final 'kvm_nvhe.o', ready to be linked into 'vmlinux'. 45*ab25464bSDavid Brazdil# Prefixes names of ELF symbols with '__kvm_nvhe_'. 46*ab25464bSDavid Brazdil$(obj)/kvm_nvhe.o: $(obj)/kvm_nvhe.tmp.o FORCE 4776217129SDavid Brazdil $(call if_changed,hypcopy) 4876217129SDavid Brazdil 49bdbc0c7aSDavid Brazdil# The HYPCOPY command uses `objcopy` to prefix all ELF symbol names 50*ab25464bSDavid Brazdil# to avoid clashes with VHE code/data. 5176217129SDavid Brazdilquiet_cmd_hypcopy = HYPCOPY $@ 52*ab25464bSDavid Brazdil cmd_hypcopy = $(OBJCOPY) --prefix-symbols=__kvm_nvhe_ $< $@ 53c50cb043SDavid Brazdil 54c50cb043SDavid Brazdil# Remove ftrace and Shadow Call Stack CFLAGS. 55c50cb043SDavid Brazdil# This is equivalent to the 'notrace' and '__noscs' annotations. 56c50cb043SDavid BrazdilKBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) 5776217129SDavid Brazdil 5876217129SDavid Brazdil# KVM nVHE code is run at a different exception code with a different map, so 5976217129SDavid Brazdil# compiler instrumentation that inserts callbacks or checks into the code may 6076217129SDavid Brazdil# cause crashes. Just disable it. 6176217129SDavid BrazdilGCOV_PROFILE := n 6276217129SDavid BrazdilKASAN_SANITIZE := n 6376217129SDavid BrazdilUBSAN_SANITIZE := n 6476217129SDavid BrazdilKCOV_INSTRUMENT := n 6576217129SDavid Brazdil 6676217129SDavid Brazdil# Skip objtool checking for this directory because nVHE code is compiled with 6776217129SDavid Brazdil# non-standard build rules. 6876217129SDavid BrazdilOBJECT_FILES_NON_STANDARD := y 69