| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # Makefile for Kernel-based Virtual Machine module, HYP/nVHE part |
| # |
| |
| asflags-y := -D__KVM_NVHE_HYPERVISOR__ |
| ccflags-y := -D__KVM_NVHE_HYPERVISOR__ |
| |
| obj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o host.o \ |
| hyp-main.o hyp-smp.o psci-relay.o |
| obj-y += ../vgic-v3-sr.o ../aarch32.o ../vgic-v2-cpuif-proxy.o ../entry.o \ |
| ../fpsimd.o ../hyp-entry.o ../exception.o |
| |
| ## |
| ## Build rules for compiling nVHE hyp code |
| ## Output of this folder is `kvm_nvhe.o`, a partially linked object |
| ## file containing all nVHE hyp code and data. |
| ## |
| |
| hyp-obj := $(patsubst %.o,%.nvhe.o,$(obj-y)) |
| obj-y := kvm_nvhe.o |
| extra-y := $(hyp-obj) kvm_nvhe.tmp.o hyp.lds |
| |
| # 1) Compile all source files to `.nvhe.o` object files. The file extension |
| # avoids file name clashes for files shared with VHE. |
| $(obj)/%.nvhe.o: $(src)/%.c FORCE |
| $(call if_changed_rule,cc_o_c) |
| $(obj)/%.nvhe.o: $(src)/%.S FORCE |
| $(call if_changed_rule,as_o_S) |
| |
| # 2) Compile linker script. |
| $(obj)/hyp.lds: $(src)/hyp.lds.S FORCE |
| $(call if_changed_dep,cpp_lds_S) |
| |
| # 3) Partially link all '.nvhe.o' files and apply the linker script. |
| # Prefixes names of ELF sections with '.hyp', eg. '.hyp.text'. |
| # Note: The following rule assumes that the 'ld' rule puts LDFLAGS before |
| # the list of dependencies to form '-T $(obj)/hyp.lds'. This is to |
| # keep the dependency on the target while avoiding an error from |
| # GNU ld if the linker script is passed to it twice. |
| LDFLAGS_kvm_nvhe.tmp.o := -r -T |
| $(obj)/kvm_nvhe.tmp.o: $(obj)/hyp.lds $(addprefix $(obj)/,$(hyp-obj)) FORCE |
| $(call if_changed,ld) |
| |
| # 4) Produce the final 'kvm_nvhe.o', ready to be linked into 'vmlinux'. |
| # Prefixes names of ELF symbols with '__kvm_nvhe_'. |
| $(obj)/kvm_nvhe.o: $(obj)/kvm_nvhe.tmp.o FORCE |
| $(call if_changed,hypcopy) |
| |
| # The HYPCOPY command uses `objcopy` to prefix all ELF symbol names |
| # to avoid clashes with VHE code/data. |
| quiet_cmd_hypcopy = HYPCOPY $@ |
| cmd_hypcopy = $(OBJCOPY) --prefix-symbols=__kvm_nvhe_ $< $@ |
| |
| # Remove ftrace and Shadow Call Stack CFLAGS. |
| # This is equivalent to the 'notrace' and '__noscs' annotations. |
| KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) |
| |
| # KVM nVHE code is run at a different exception code with a different map, so |
| # compiler instrumentation that inserts callbacks or checks into the code may |
| # cause crashes. Just disable it. |
| GCOV_PROFILE := n |
| KASAN_SANITIZE := n |
| UBSAN_SANITIZE := n |
| KCOV_INSTRUMENT := n |
| |
| # Skip objtool checking for this directory because nVHE code is compiled with |
| # non-standard build rules. |
| OBJECT_FILES_NON_STANDARD := y |