initial buildroot for linux 5.15

package/kvm-unit-tests/Config.in

@@ -0,0 +1,39 @@
+config BR2_PACKAGE_KVM_UNIT_TESTS_ARCH_SUPPORTS
+	bool
+	# On ARM, it uses virtualization extensions
+	default y if BR2_cortex_a7 || BR2_cortex_a12 || \
+		BR2_cortex_a15 || BR2_cortex_a15_a7 || \
+		BR2_cortex_a17 || BR2_cortex_a17_a7
+	default y if BR2_i386 || BR2_x86_64
+	default y if BR2_powerpc64 || BR2_powerpc64le
+
+config BR2_PACKAGE_KVM_UNIT_TESTS
+	bool "kvm-unit-tests"
+	depends on BR2_PACKAGE_KVM_UNIT_TESTS_ARCH_SUPPORTS
+	# on i386 and x86-64, __builtin_reachable is used, so we need
+	# gcc 4.5 at least. on i386, we use the target gcc, while on
+	# x86-64 we use the host gcc (see .mk file for details)
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_5 || !BR2_i386
+	depends on BR2_HOSTARCH = "x86_64" || !BR2_x86_64
+	select BR2_HOSTARCH_NEEDS_IA32_COMPILER if BR2_x86_64=y
+	help
+	  kvm-unit-tests is a project as old as KVM. As its name
+	  suggests, it's purpose is to provide unit tests for KVM. The
+	  unit tests are tiny guest operating systems that generally
+	  execute only tens of lines of C and assembler test code in
+	  order to obtain its PASS/FAIL result. Unit tests provide KVM
+	  and virt hardware functional testing by targeting the
+	  features through minimal implementations of their use per
+	  the hardware specification. The simplicity of unit tests
+	  make them easy to verify they are correct, easy to maintain,
+	  and easy to use in timing measurements. Unit tests are also
+	  often used for quick and dirty bug reproducers. The
+	  reproducers may then be kept as regression tests.  It's
+	  strongly encouraged that patches implementing new KVM
+	  features are submitted with accompanying unit tests.
+
+	  http://www.linux-kvm.org/page/KVM-unit-tests
+
+comment "kvm-unit-tests needs a toolchain w/ gcc >= 4.5"
+	depends on BR2_i386
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_5