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# 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