cbmk/config/coreboot/default/patches/0025-never-enable-cpu-microcode-even-if-told-to.patch

From eaec1bbb21283fa409a2d1610688c05a62c7b1bc Mon Sep 17 00:00:00 2001
From: Leah Rowe <leah@libreboot.org>
Date: Thu, 12 Oct 2023 01:20:23 +0100
Subject: [PATCH 1/1] never enable cpu microcode, even if told to

Signed-off-by: Leah Rowe <leah@libreboot.org>
---
 src/cpu/Makefile.inc           | 55 ----------------------------------
 src/cpu/intel/fit/Makefile.inc | 31 -------------------
 2 files changed, 86 deletions(-)

diff --git a/src/cpu/Makefile.inc b/src/cpu/Makefile.inc
index 12c682d43d..e5fb13b33d 100644
--- a/src/cpu/Makefile.inc
+++ b/src/cpu/Makefile.inc
@@ -9,61 +9,6 @@ subdirs-$(CONFIG_ARCH_X86) += x86
 subdirs-$(CONFIG_CPU_QEMU_X86) += qemu-x86
 subdirs-$(CONFIG_CPU_POWER9) += power9
 
-$(eval $(call create_class_compiler,cpu_microcode,x86_32))
-################################################################################
-## Rules for building the microcode blob in CBFS
-################################################################################
-
-cbfs-files-$(CONFIG_USE_CPU_MICROCODE_CBFS_BINS) += cpu_microcode_blob.bin
-
-ifeq ($(CONFIG_CPU_MICROCODE_CBFS_EXTERNAL_HEADER),y)
-cbfs-files-y  += cpu_microcode_blob.bin
-cpu_microcode_blob.bin-file = $(objgenerated)/microcode.bin
-
-$(objgenerated)/microcode.bin: $(call strip_quotes,$(CONFIG_CPU_MICROCODE_HEADER_FILES))
-	echo "   util/scripts/ucode_h_to_bin.sh $(objgenerated)/microcode.bin \"$(CONFIG_CPU_MICROCODE_HEADER_FILES)\""
-	util/scripts/ucode_h_to_bin.sh $(objgenerated)/microcode.bin $(CONFIG_CPU_MICROCODE_HEADER_FILES)
-endif
-
-ifeq ($(CONFIG_CPU_MICROCODE_CBFS_EXTERNAL_BINS),y)
-$(obj)/cpu_microcode_blob.bin: cpu_microcode_bins := $(call strip_quotes,$(CONFIG_CPU_UCODE_BINARIES))
-endif
-# otherwise `cpu_microcode_bins` should be filled by platform makefiles
-
-# We just mash all microcode binaries together into one binary to rule them all.
-# This approach assumes that the microcode binaries are properly padded, and
-# their headers specify the correct size. This works fairly well on isolatied
-# updates, such as Intel and some AMD microcode, but won't work very well if the
-# updates are wrapped in a container, like AMD's microcode update container. If
-# there is only one microcode binary (i.e. one container), then we don't have
-# this issue, and this rule will continue to work.
-$(obj)/cpu_microcode_blob.bin: $$(wildcard $$(cpu_microcode_bins)) $(DOTCONFIG)
-	for bin in $(cpu_microcode_bins); do \
-		if [ ! -f "$$bin" ]; then \
-			echo "Microcode error: $$bin does not exist"; \
-			NO_MICROCODE_FILE=1; \
-		fi; \
-	done; \
-	if [ -n "$$NO_MICROCODE_FILE" ]; then \
-		if [ -z "$(CONFIG_USE_BLOBS)" ] && [ -n "$(CONFIG_CPU_MICROCODE_CBFS_DEFAULT_BINS)" ]; then \
-			echo "Try enabling binary-only repository in Kconfig 'General setup' menu."; \
-		fi; \
-		false; \
-	fi
-	$(if $(cpu_microcode_bins),,false) # fail if no file is given at all
-	@printf "    MICROCODE  $(subst $(obj)/,,$(@))\n"
-	@echo $(cpu_microcode_bins)
-	cat $(cpu_microcode_bins) > $@
-
-cpu_microcode_blob.bin-file ?= $(obj)/cpu_microcode_blob.bin
-cpu_microcode_blob.bin-type := microcode
-# The AMD LPC SPI DMA controller requires source files to be 64 byte aligned.
-ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_LPC_SPI_DMA),y)
-cpu_microcode_blob.bin-align := 64
-else
-cpu_microcode_blob.bin-align := 16
-endif
-
 ifneq ($(CONFIG_CPU_MICROCODE_CBFS_LOC),)
 cpu_microcode_blob.bin-COREBOOT-position := $(CONFIG_CPU_MICROCODE_CBFS_LOC)
 endif
diff --git a/src/cpu/intel/fit/Makefile.inc b/src/cpu/intel/fit/Makefile.inc
index da4549e5d1..c31102872e 100644
--- a/src/cpu/intel/fit/Makefile.inc
+++ b/src/cpu/intel/fit/Makefile.inc
@@ -17,35 +17,4 @@ $(call add_intermediate, set_fit_ptr, $(IFITTOOL))
 
 FIT_ENTRY=$(call strip_quotes, $(CONFIG_INTEL_TOP_SWAP_FIT_ENTRY_FMAP_REG))
 
-ifneq ($(CONFIG_UPDATE_IMAGE),y) # never update the bootblock
-
-ifneq ($(CONFIG_CPU_MICROCODE_CBFS_NONE)$(CONFIG_CPU_INTEL_MICROCODE_CBFS_SPLIT_BINS),y)
-
-$(call add_intermediate, add_mcu_fit, set_fit_ptr $(IFITTOOL))
-	@printf "    UPDATE-FIT Microcode\n"
-	$(IFITTOOL) -f $< -a -n cpu_microcode_blob.bin -t 1 -s $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES) -r COREBOOT
-
-# Second FIT in TOP_SWAP bootblock
-ifeq ($(CONFIG_INTEL_ADD_TOP_SWAP_BOOTBLOCK),y)
-
-$(call add_intermediate, set_ts_fit_ptr, $(IFITTOOL))
-	@printf "    UPDATE-FIT Top Swap: set FIT pointer to table\n"
-	$(IFITTOOL) -f $< -F -n intel_fit_ts -r COREBOOT $(TS_OPTIONS)
-
-$(call add_intermediate, add_ts_mcu_fit, set_ts_fit_ptr $(IFITTOOL))
-	@printf "    UPDATE-FIT Top Swap: Microcode\n"
-ifneq ($(FIT_ENTRY),)
-	$(IFITTOOL) -f $< -A -n $(FIT_ENTRY) -t 1 -s $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES) $(TS_OPTIONS) -r COREBOOT
-endif # FIT_ENTRY
-	$(IFITTOOL) -f $< -a -n cpu_microcode_blob.bin -t 1 -s $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES) $(TS_OPTIONS) -r COREBOOT
-
-cbfs-files-y += intel_fit_ts
-intel_fit_ts-file := fit_table.c:struct
-intel_fit_ts-type := intel_fit
-intel_fit_ts-align := 16
-
-endif # CONFIG_INTEL_ADD_TOP_SWAP_BOOTBLOCK
-
-endif # CONFIG_CPU_MICROCODE_CBFS_NONE
-
 endif # CONFIG_UPDATE_IMAGE
-- 
2.39.2