initial buildroot for linux 5.15

package/intel-microcode/Config.in

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+config BR2_PACKAGE_INTEL_MICROCODE
+	bool "intel-microcode"
+	depends on BR2_x86_64 || BR2_i386
+	help
+	  This package provides an Intel microcode data file that can be
+	  used to correct processor errors. The iucode-tool package and
+	  proper kernel support are required to upload the microcode.
+
+	  https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files
+
+config BR2_PACKAGE_INTEL_MICROCODE_INSTALL_TARGET
+	bool "install microcode files to /lib/firmware in target"
+	default y
+	depends on BR2_PACKAGE_INTEL_MICROCODE
+	help
+	  Select this option to have the microcode files installed to
+	  /lib/firmware/intel-ucode in the target root filesystem, in
+	  addition to the images directory.

package/intel-microcode/intel-microcode.hash

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+# Locally computed
+sha256  fd85b6b769efd029dec6a2c07106fd18fb4dcb548b7bc4cde09295a8344ef6d7  intel-microcode-20210608.tar.gz
+sha256  03efb1491c7e899feb2665fa299363e64035e5444c1b8bc1f6ebed30de964e12  license

package/intel-microcode/intel-microcode.mk

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+################################################################################
+#
+# intel-microcode
+#
+################################################################################
+
+INTEL_MICROCODE_VERSION = 20210608
+INTEL_MICROCODE_SITE = $(call github,intel,Intel-Linux-Processor-Microcode-Data-Files,microcode-$(INTEL_MICROCODE_VERSION))
+INTEL_MICROCODE_LICENSE = PROPRIETARY
+INTEL_MICROCODE_LICENSE_FILES = license
+INTEL_MICROCODE_REDISTRIBUTE = NO
+INTEL_MICROCODE_INSTALL_IMAGES = YES
+
+define INTEL_MICROCODE_INSTALL_IMAGES_CMDS
+	mkdir -p $(BINARIES_DIR)/intel-ucode
+	$(INSTALL) -m 0644 -t $(BINARIES_DIR)/intel-ucode \
+		$(@D)/intel-ucode/*
+endef
+
+ifeq ($(BR2_PACKAGE_INTEL_MICROCODE_INSTALL_TARGET),y)
+define INTEL_MICROCODE_INSTALL_TARGET_CMDS
+	mkdir -p $(TARGET_DIR)/lib/firmware/intel-ucode
+	$(INSTALL) -m 0644 -t $(TARGET_DIR)/lib/firmware/intel-ucode \
+		$(@D)/intel-ucode/*
+endef
+else
+INTEL_MICROCODE_INSTALL_TARGET = NO
+endif
+
+define INTEL_MICROCODE_LINUX_CONFIG_FIXUPS
+	$(call KCONFIG_ENABLE_OPT,CONFIG_MICROCODE)
+	$(call KCONFIG_ENABLE_OPT,CONFIG_MICROCODE_INTEL)
+endef
+
+$(eval $(generic-package))