| # 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 |
| obj-y += ../vgic-v3-sr.o ../aarch32.o ../vgic-v2-cpuif-proxy.o ../entry.o \ |
| ../fpsimd.o ../hyp-entry.o |
| |
| obj-y := $(patsubst %.o,%.hyp.o,$(obj-y)) |
| extra-y := $(patsubst %.hyp.o,%.hyp.tmp.o,$(obj-y)) |
| |
| $(obj)/%.hyp.tmp.o: $(src)/%.c FORCE |
| $(call if_changed_rule,cc_o_c) |
| $(obj)/%.hyp.tmp.o: $(src)/%.S FORCE |
| $(call if_changed_rule,as_o_S) |
| $(obj)/%.hyp.o: $(obj)/%.hyp.tmp.o FORCE |
| $(call if_changed,hypcopy) |
| |
| # Disable reordering functions by GCC (enabled at -O2). |
| # This pass puts functions into '.text.*' sections to aid the linker |
| # in optimizing ELF layout. See HYPCOPY comment below for more info. |
| ccflags-y += $(call cc-option,-fno-reorder-functions) |
| |
| # The HYPCOPY command uses `objcopy` to prefix all ELF symbol names |
| # and relevant ELF section names to avoid clashes with VHE code/data. |
| # |
| # Hyp code is assumed to be in the '.text' section of the input object |
| # files (with the exception of specialized sections such as |
| # '.hyp.idmap.text'). This assumption may be broken by a compiler that |
| # divides code into sections like '.text.unlikely' so as to optimize |
| # ELF layout. HYPCOPY checks that no such sections exist in the input |
| # using `objdump`, otherwise they would be linked together with other |
| # kernel code and not memory-mapped correctly at runtime. |
| quiet_cmd_hypcopy = HYPCOPY $@ |
| cmd_hypcopy = \ |
| if $(OBJDUMP) -h $< | grep -F '.text.'; then \ |
| echo "$@: function reordering not supported in nVHE hyp code" >&2; \ |
| /bin/false; \ |
| fi; \ |
| $(OBJCOPY) --prefix-symbols=__kvm_nvhe_ \ |
| --rename-section=.text=.hyp.text \ |
| $< $@ |
| |
| # 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 |