Re: [kvm-unit-tests PATCH v2 22/23] arm64: Add support for efi in Makefile

[Ricardo Koller <ricarkol@google.com>]

On Fri, May 06, 2022 at 09:56:04PM +0100, Nikos Nikoleris wrote:
> Users can now build kvm-unit-tests as efi apps by supplying an extra
> argument when invoking configure:
> 
> $> ./configure --enable-efi
> 
> This patch is based on an earlier version by
> Andrew Jones <drjones@redhat.com>
> 
> Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
> ---
>  configure           | 15 ++++++++++++---
>  arm/Makefile.arm    |  6 ++++++
>  arm/Makefile.arm64  | 18 ++++++++++++++----
>  arm/Makefile.common | 45 ++++++++++++++++++++++++++++++++++-----------
>  4 files changed, 66 insertions(+), 18 deletions(-)
> 
> diff --git a/configure b/configure
> index 86c3095..beef655 100755
> --- a/configure
> +++ b/configure
> @@ -195,14 +195,19 @@ else
>      fi
>  fi
>  
> -if [ "$efi" ] && [ "$arch" != "x86_64" ]; then
> +if [ "$efi" ] && [ "$arch" != "x86_64" ] && [ "$arch" != "arm64" ]; then
>      echo "--[enable|disable]-efi is not supported for $arch"
>      usage
>  fi
>  
>  if [ -z "$page_size" ]; then
> -    [ "$arch" = "arm64" ] && page_size="65536"
> -    [ "$arch" = "arm" ] && page_size="4096"
> +    if [ "$efi" = 'y' ] && [ "$arch" = "arm64" ]; then
> +        page_size="4096"
> +    elif [ "$arch" = "arm64" ]; then
> +        page_size="65536"
> +    elif [ "$arch" = "arm" ]; then
> +        page_size="4096"
> +    fi
>  else
>      if [ "$arch" != "arm64" ]; then
>          echo "--page-size is not supported for $arch"
> @@ -217,6 +222,10 @@ else
>          echo "arm64 doesn't support page size of $page_size"
>          usage
>      fi
> +    if [ "$efi" = 'y' ] && [ "$page_size" != "4096" ]; then
> +        echo "efi must use 4K pages"
> +        exit 1
> +    fi

nit: not really needed as x86 doesn't allow other page sizes, arm64
already forces 4096 above, and arm32 doesn't support efi.

>  fi
>  
>  [ -z "$processor" ] && processor="$arch"
> diff --git a/arm/Makefile.arm b/arm/Makefile.arm
> index 01fd4c7..2ce00f5 100644
> --- a/arm/Makefile.arm
> +++ b/arm/Makefile.arm
> @@ -7,6 +7,10 @@ bits = 32
>  ldarch = elf32-littlearm
>  machine = -marm -mfpu=vfp
>  
> +ifeq ($(CONFIG_EFI),y)
> +$(error Cannot build arm32 tests as EFI apps)
> +endif
> +
>  # stack.o relies on frame pointers.
>  KEEP_FRAME_POINTER := y
>  
> @@ -32,6 +36,8 @@ cflatobjs += lib/arm/stack.o
>  cflatobjs += lib/ldiv32.o
>  cflatobjs += lib/arm/ldivmod.o
>  
> +exe = flat
> +
>  # arm specific tests
>  tests =
>  
> diff --git a/arm/Makefile.arm64 b/arm/Makefile.arm64
> index 6feac76..550e1b2 100644
> --- a/arm/Makefile.arm64
> +++ b/arm/Makefile.arm64
> @@ -27,11 +27,21 @@ cflatobjs += lib/arm64/gic-v3-its.o lib/arm64/gic-v3-its-cmd.o
>  
>  OBJDIRS += lib/arm64
>  
> +ifeq ($(CONFIG_EFI),y)
> +# avoid jump tables before all relocations have been processed
> +arm/efi/reloc_aarch64.o: CFLAGS += -fno-jump-tables
> +cflatobjs += arm/efi/reloc_aarch64.o
> +
> +exe = efi
> +else
> +exe = flat
> +endif
> +
>  # arm64 specific tests
> -tests = $(TEST_DIR)/timer.flat
> -tests += $(TEST_DIR)/micro-bench.flat
> -tests += $(TEST_DIR)/cache.flat
> -tests += $(TEST_DIR)/debug.flat
> +tests = $(TEST_DIR)/timer.$(exe)
> +tests += $(TEST_DIR)/micro-bench.$(exe)
> +tests += $(TEST_DIR)/cache.$(exe)
> +tests += $(TEST_DIR)/debug.$(exe)
>  
>  include $(SRCDIR)/$(TEST_DIR)/Makefile.common
>  
> diff --git a/arm/Makefile.common b/arm/Makefile.common
> index 5be42c0..a8007f4 100644
> --- a/arm/Makefile.common
> +++ b/arm/Makefile.common
> @@ -4,14 +4,14 @@
>  # Authors: Andrew Jones <drjones@redhat.com>
>  #
>  
> -tests-common  = $(TEST_DIR)/selftest.flat
> -tests-common += $(TEST_DIR)/spinlock-test.flat
> -tests-common += $(TEST_DIR)/pci-test.flat
> -tests-common += $(TEST_DIR)/pmu.flat
> -tests-common += $(TEST_DIR)/gic.flat
> -tests-common += $(TEST_DIR)/psci.flat
> -tests-common += $(TEST_DIR)/sieve.flat
> -tests-common += $(TEST_DIR)/pl031.flat
> +tests-common  = $(TEST_DIR)/selftest.$(exe)
> +tests-common += $(TEST_DIR)/spinlock-test.$(exe)
> +tests-common += $(TEST_DIR)/pci-test.$(exe)
> +tests-common += $(TEST_DIR)/pmu.$(exe)
> +tests-common += $(TEST_DIR)/gic.$(exe)
> +tests-common += $(TEST_DIR)/psci.$(exe)
> +tests-common += $(TEST_DIR)/sieve.$(exe)
> +tests-common += $(TEST_DIR)/pl031.$(exe)
>  
>  tests-all = $(tests-common) $(tests)
>  all: directories $(tests-all)
> @@ -54,6 +54,9 @@ cflatobjs += lib/arm/smp.o
>  cflatobjs += lib/arm/delay.o
>  cflatobjs += lib/arm/gic.o lib/arm/gic-v2.o lib/arm/gic-v3.o
>  cflatobjs += lib/arm/timer.o
> +ifeq ($(CONFIG_EFI),y)
> +cflatobjs += lib/efi.o
> +endif
>  
>  OBJDIRS += lib/arm
>  
> @@ -61,6 +64,25 @@ libeabi = lib/arm/libeabi.a
>  eabiobjs = lib/arm/eabi_compat.o
>  
>  FLATLIBS = $(libcflat) $(LIBFDT_archive) $(libeabi)
> +
> +ifeq ($(CONFIG_EFI),y)
> +%.so: EFI_LDFLAGS += -defsym=EFI_SUBSYSTEM=0xa --no-undefined
> +%.so: %.o $(FLATLIBS) $(SRCDIR)/arm/efi/elf_aarch64_efi.lds $(cstart.o)
> +	$(CC) $(CFLAGS) -c -o $(@:.so=.aux.o) $(SRCDIR)/lib/auxinfo.c \
> +		-DPROGNAME=\"$(@:.so=.efi)\" -DAUXFLAGS=$(AUXFLAGS)
> +	$(LD) $(EFI_LDFLAGS) -o $@ -T $(SRCDIR)/arm/efi/elf_aarch64_efi.lds \
> +		$(filter %.o, $^) $(FLATLIBS) $(@:.so=.aux.o) \
> +		$(EFI_LIBS)
> +	$(RM) $(@:.so=.aux.o)
> +
> +%.efi: %.so
> +	$(call arch_elf_check, $^)
> +	$(OBJCOPY) \
> +		-j .text -j .sdata -j .data -j .dynamic -j .dynsym \
> +		-j .rel -j .rela -j .rel.* -j .rela.* -j .rel* -j .rela* \
> +		-j .reloc \
> +		-O binary $^ $@
> +else
>  %.elf: LDFLAGS = -nostdlib $(arch_LDFLAGS)
>  %.elf: %.o $(FLATLIBS) $(SRCDIR)/arm/flat.lds $(cstart.o)
>  	$(CC) $(CFLAGS) -c -o $(@:.elf=.aux.o) $(SRCDIR)/lib/auxinfo.c \
> @@ -74,13 +96,14 @@ FLATLIBS = $(libcflat) $(LIBFDT_archive) $(libeabi)
>  	$(call arch_elf_check, $^)
>  	$(OBJCOPY) -O binary $^ $@
>  	@chmod a-x $@
> +endif
>  
>  $(libeabi): $(eabiobjs)
>  	$(AR) rcs $@ $^
>  
>  arm_clean: asm_offsets_clean
> -	$(RM) $(TEST_DIR)/*.{o,flat,elf} $(libeabi) $(eabiobjs) \
> -	      $(TEST_DIR)/.*.d lib/arm/.*.d
> +	$(RM) $(TEST_DIR)/*.{o,flat,elf,so,efi} $(libeabi) $(eabiobjs) \
> +	      $(TEST_DIR)/.*.d $(TEST_DIR)/efi/.*.d lib/arm/.*.d
>  
>  generated-files = $(asm-offsets)
> -$(tests-all:.flat=.o) $(cstart.o) $(cflatobjs): $(generated-files)
> +$(tests-all:.$(exe)=.o) $(cstart.o) $(cflatobjs): $(generated-files)
> -- 
> 2.25.1
>