diff options
Diffstat (limited to 'resources/coreboot/default/patches/0025-never-add-cpu-microcode-updates.patch')
| -rw-r--r-- | resources/coreboot/default/patches/0025-never-add-cpu-microcode-updates.patch | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/resources/coreboot/default/patches/0025-never-add-cpu-microcode-updates.patch b/resources/coreboot/default/patches/0025-never-add-cpu-microcode-updates.patch new file mode 100644 index 00000000..0a5515cc --- /dev/null +++ b/resources/coreboot/default/patches/0025-never-add-cpu-microcode-updates.patch @@ -0,0 +1,157 @@ +From 6490aad9a1095c837a13cf3002cd4f7340267964 Mon Sep 17 00:00:00 2001 +From: Leah Rowe <leah@libreboot.org> +Date: Sat, 8 Jul 2023 20:33:59 +0100 +Subject: [PATCH 1/1] never add cpu microcode updates + +we do it at the source. + +this way, we can just leave the default option +enabled in coreboot configs, which is to include +the microcode updates. + +however, this patch to the coreboot build system +will result in the default setting being ignored. + +simply put: no action will be taken. + +no microcode updates will ever be inserted. + +this combined with ommitting --checkout in +the submodule update command, should result reliably +in no-microcode roms being the only reality in this +version of coreboot, at least on intel machines. + +amd is another matter (for d8 and d16, the solution was/is +to just patch the coreboot code to not add them - which actually +is exactly the same as this change) + +Signed-off-by: Leah Rowe <leah@libreboot.org> +--- + src/cpu/Makefile.inc | 59 ----------------------- + src/cpu/intel/fit/Makefile.inc | 33 ------------- + src/soc/amd/common/block/cpu/Makefile.inc | 1 - + 3 files changed, 93 deletions(-) + +diff --git a/src/cpu/Makefile.inc b/src/cpu/Makefile.inc +index 12c682d43d..6be29bc942 100644 +--- a/src/cpu/Makefile.inc ++++ b/src/cpu/Makefile.inc +@@ -8,62 +8,3 @@ subdirs-y += ti + 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 d3f12e43e6..10d1c7c1fe 100644 +--- a/src/cpu/intel/fit/Makefile.inc ++++ b/src/cpu/intel/fit/Makefile.inc +@@ -16,36 +16,3 @@ $(call add_intermediate, set_fit_ptr, $(IFITTOOL)) + $(IFITTOOL) -f $< -F -n intel_fit -r COREBOOT -c + + FIT_ENTRY=$(call strip_quotes, $(CONFIG_INTEL_TOP_SWAP_FIT_ENTRY_FMAP_REG)) +- +-ifneq ($(CONFIG_UPDATE_IMAGE),y) # never update the bootblock +- +-ifneq ($(CONFIG_CPU_MICROCODE_CBFS_NONE),y) +- +-$(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) $(TS_OPTIONS) -r COREBOOT +- +-cbfs-files-y += intel_fit_ts +-intel_fit_ts-file := fit_table.c:struct +-intel_fit_ts-type := intel_fit +-intel_fit_ts-align := 16 +- +-endif # CONFIG_INTEL_ADD_TOP_SWAP_BOOTBLOCK +- +-endif # CONFIG_CPU_MICROCODE_CBFS_NONE +- +-endif # CONFIG_UPDATE_IMAGE +diff --git a/src/soc/amd/common/block/cpu/Makefile.inc b/src/soc/amd/common/block/cpu/Makefile.inc +index bd9e8ff88f..6f95b9684c 100644 +--- a/src/soc/amd/common/block/cpu/Makefile.inc ++++ b/src/soc/amd/common/block/cpu/Makefile.inc +@@ -6,7 +6,6 @@ ramstage-y += cpu.c + + ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_UCODE),y) + define add-ucode-as-cbfs +-cbfs-files-y += cpu_microcode_$(2).bin + cpu_microcode_$(2).bin-file := $(1) + cpu_microcode_$(2).bin-type := microcode + +-- +2.40.1 + |