tests/vm: don't build using TCG by default

While it is useful to run these images using TCG their performance
will not be anything like the native guests. Don't do it by default.

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/393


Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211115142915.3797652-4-alex.bennee@linaro.org>

tests/vm/Makefile.include

@@ -2,14 +2,22 @@
 
 .PHONY: vm-build-all vm-clean-all
 
+HOST_ARCH = $(if $(ARCH),$(ARCH),$(shell uname -m))
+
 EFI_AARCH64 = $(wildcard $(BUILD_DIR)/pc-bios/edk2-aarch64-code.fd)
 
-IMAGES := freebsd netbsd openbsd centos fedora haiku.x86_64
+X86_IMAGES := freebsd netbsd openbsd centos fedora haiku.x86_64
 ifneq ($(GENISOIMAGE),)
-IMAGES += ubuntu.i386 centos
+X86_IMAGES += ubuntu.i386 centos
 ifneq ($(EFI_AARCH64),)
-IMAGES += ubuntu.aarch64 centos.aarch64
+ARM64_IMAGES += ubuntu.aarch64 centos.aarch64
+endif
 endif
+
+ifeq ($(HOST_ARCH),x86_64)
+IMAGES=$(X86_IMAGES) $(if $(USE_TCG),$(ARM64_IMAGES))
+else ifeq ($(HOST_ARCH),aarch64)
+IMAGES=$(ARM64_IMAGES) $(if $(USE_TCG),$(X86_IMAGES))
 endif
 
 IMAGES_DIR := $(HOME)/.cache/qemu-vm/images
@@ -43,7 +51,7 @@ else
 endif
 	@echo "  vm-build-haiku.x86_64           - Build QEMU in Haiku VM"
 	@echo ""
-	@echo "  vm-build-all                    - Build QEMU in all VMs"
+	@echo "  vm-build-all                    - Build QEMU in: $(IMAGES)"
 	@echo "  vm-clean-all                    - Clean up VM images"
 	@echo
 	@echo "For trouble-shooting:"
@@ -56,6 +64,7 @@ endif
 	@echo '    EXTRA_CONFIGURE_OPTS="..."   - Pass to configure step'
 	@echo "    J=[0..9]*            	 - Override the -jN parameter for make commands"
 	@echo "    LOG_CONSOLE=1        	 - Log console to file in: ~/.cache/qemu-vm "
+	@echo "    USE_TCG=1        	         - Use TCG for cross-arch images"
 	@echo "    QEMU=/path/to/qemu		 - Change path to QEMU binary"
 ifeq ($(HAVE_PYTHON_YAML),yes)
 	@echo "    QEMU_CONFIG=/path/conf.yml   - Change path to VM configuration .yml file."