diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/Kconfig | 88 | ||||
| -rw-r--r-- | src/cpu/Makefile.inc | 37 | ||||
| -rw-r--r-- | src/cpu/intel/microcode/Makefile.inc | 20 | ||||
| -rw-r--r-- | src/cpu/intel/microcode/microcode.c | 8 | ||||
| -rw-r--r-- | src/cpu/intel/model_206ax/Kconfig | 2 | ||||
| -rw-r--r-- | src/cpu/intel/model_206ax/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/cpu/intel/model_206ax/microcode_blob.c (renamed from src/cpu/intel/microcode/microcode_blob.c) | 2 |
7 files changed, 134 insertions, 25 deletions
diff --git a/src/cpu/Kconfig b/src/cpu/Kconfig index baf686ea75..1ed721f7e0 100644 --- a/src/cpu/Kconfig +++ b/src/cpu/Kconfig @@ -62,10 +62,90 @@ config SSE2 streaming SIMD instructions. Some parts of coreboot can be built with more efficient code if SSE2 instructions are available. -config MICROCODE_IN_CBFS - bool "Look for microcode in CBFS" +endif # ARCH_X86 + +config CPU_MICROCODE_IN_CBFS + bool default n + +choice + prompt "Include CPU microcode in CBFS" + default CPU_MICROCODE_CBFS_GENERATE if CPU_MICROCODE_IN_CBFS + default CPU_MICROCODE_CBFS_NONE if !CPU_MICROCODE_IN_CBFS + +config CPU_MICROCODE_CBFS_GENERATE + bool "Generate from tree" help - Load microcode updates from CBFS instead of compiling them in. + Select this option if you want microcode updates to be assembled when + building coreboot and included in the final image as a separate CBFS + file. Microcode will not be hard-coded into ramstage. -endif # ARCH_X86 + The microcode file and may be removed from the ROM image at a later + time with cbfstool, if desired. + + If unsure, select this option. + +config CPU_MICROCODE_CBFS_EXTERNAL + bool "Include external microcode file" + help + Select this option if you want to include an external file containing + the CPU microcode. This will be included as a separate file in CBFS. + A word of caution: only select this option if you are sure the + microcode that you have is newer than the microcode shipping with + coreboot. + + The microcode file and may be removed from the ROM image at a later + time with cbfstool, if desired. + + If unsure, select "Generate from tree" + +config CPU_MICROCODE_FILE + string "Path and filename of CPU microcode" + depends on CPU_MICROCODE_CBFS_EXTERNAL + default "cpu_microcode.bin" + help + The path and filename of the file containing the CPU microcode. + +config CPU_MICROCODE_CBFS_NONE + bool "Do not include microcode updates" + help + Select this option if you do not want CPU microcode included in CBFS. + Note that for some CPUs, the microcode is hard-coded into the source + tree and is not loaded from CBFS. In this case, microcode will still + be updated. There is a push to move all microcode to CBFS, but this + change is not implemented for all CPUs. + + This option currently applies to: + - Intel SandyBridge/IvyBridge + - VIA Nano + + Microcode may be added to the ROM image at a later time with cbfstool, + if desired. + + If unsure, select "Generate from tree" + + The GOOD: + Microcode updates intend to solve issues that have been discovered + after CPU production. The expected effect is that systems work as + intended with the updated microcode, but we have also seen cases where + issues were solved by not applying microcode updates. + + The BAD: + Note that some operating system include these same microcode patches, + so you may need to also disable microcode updates in your operating + system for this option to have an effect. + + The UGLY: + A word of CAUTION: some CPUs depend on microcode updates to function + correctly. Not updating the microcode may leave the CPU operating at + less than optimal performance, or may cause outright hangups. + There are CPUs where coreboot cannot properly initialize the CPU + without microcode updates + For example, if running with the factory microcode, some Intel + SandyBridge CPUs may hang when enabling CAR, or some VIA Nano CPUs + will hang when changing the frequency. + + Make sure you have a way of flashing the ROM externally before + selecting this option. + +endchoice diff --git a/src/cpu/Makefile.inc b/src/cpu/Makefile.inc index 57273cf8c3..938a8dfef1 100644 --- a/src/cpu/Makefile.inc +++ b/src/cpu/Makefile.inc @@ -1,3 +1,40 @@ +################################################################################ +## Subdirectories +################################################################################ subdirs-y += amd subdirs-y += intel subdirs-y += via + +################################################################################ +## Rules for building the microcode blob in CBFS +################################################################################ + +ifneq ($(CONFIG_CPU_MICROCODE_CBFS_NONE), y) + +cbfs-files-y += cpu_microcode_blob.bin + +cpu_microcode_blob.bin-type = 0x53 + +# External microcode file, or are we generating one ? +ifeq ($(CONFIG_CPU_MICROCODE_CBFS_EXTERNAL), y) +cpu_microcode_blob.bin-file = $(call strip_quotes,$(CONFIG_CPU_MICROCODE_FILE)) +else +cpu_microcode_blob.bin-file = $(obj)/cpu_microcode_blob.bin +endif + +# In case we have more than one "source" (cough) files containing microcode, we +# Link them together in one large blob, so that we get all the microcode updates +# in one file. This makes it easier for objcopy in the final step. +# The --entry=0 is just here to suppress the LD warning. It does not affect the +# final microcode file. +$(obj)/cpu_microcode_blob.o: $$(cpu_microcode-objs) + @printf " LD $(subst $(obj)/,,$(@))\n" + $(LD) -static --entry=0 $< -o $@ + +# We have a lot of useless data in the large blob, and we are only interested in +# the data section, so we only copy that part to the final microcode file +$(obj)/cpu_microcode_blob.bin: $(obj)/cpu_microcode_blob.o + @printf " MICROCODE $(subst $(obj)/,,$(@))\n" + $(OBJCOPY) -j .data -O binary $< $@ + +endif diff --git a/src/cpu/intel/microcode/Makefile.inc b/src/cpu/intel/microcode/Makefile.inc index f4d01020d1..22655c9532 100644 --- a/src/cpu/intel/microcode/Makefile.inc +++ b/src/cpu/intel/microcode/Makefile.inc @@ -1,15 +1,5 @@ -ramstage-y += microcode.c - - -ifeq ($(CONFIG_MICROCODE_IN_CBFS),y) - -SRC_PATH = src/cpu/intel/microcode -FLAGS = -I $(CONFIG_MICROCODE_INCLUDE_PATH) -include $(obj)/config.h -$(obj)/microcode_blob.o: $(SRC_PATH)/microcode_blob.c - $(CC) $(FLAGS) -MMD -c -o $@ $< - -$(obj)/microcode_blob.bin: $(obj)/microcode_blob.o - objcopy -j .data -O binary $< $@ - --include $(obj)/microcode_blob.d -endif +################################################################################ +## One small file with the awesome super-power of updating the cpu microcode +## directly from CBFS. You have been WARNED!!! +################################################################################ +ramstage-y += microcode.c
\ No newline at end of file diff --git a/src/cpu/intel/microcode/microcode.c b/src/cpu/intel/microcode/microcode.c index e84bad9beb..a4471ca042 100644 --- a/src/cpu/intel/microcode/microcode.c +++ b/src/cpu/intel/microcode/microcode.c @@ -28,7 +28,7 @@ #include <cpu/x86/msr.h> #include <cpu/intel/microcode.h> -#if CONFIG_MICROCODE_IN_CBFS +#if CONFIG_CPU_MICROCODE_IN_CBFS #ifdef __PRE_RAM__ #include <arch/cbfs.h> #else @@ -77,7 +77,7 @@ static inline u32 read_microcode_rev(void) return msr.hi; } -#if CONFIG_MICROCODE_IN_CBFS +#if CONFIG_CPU_MICROCODE_IN_CBFS static #endif void intel_update_microcode(const void *microcode_updates) @@ -144,9 +144,9 @@ void intel_update_microcode(const void *microcode_updates) } } -#if CONFIG_MICROCODE_IN_CBFS +#if CONFIG_CPU_MICROCODE_IN_CBFS -#define MICROCODE_CBFS_FILE "microcode_blob.bin" +#define MICROCODE_CBFS_FILE "cpu_microcode_blob.bin" void intel_update_microcode_from_cbfs(void) { diff --git a/src/cpu/intel/model_206ax/Kconfig b/src/cpu/intel/model_206ax/Kconfig index 6635868453..5c543b88ba 100644 --- a/src/cpu/intel/model_206ax/Kconfig +++ b/src/cpu/intel/model_206ax/Kconfig @@ -12,7 +12,7 @@ config CPU_SPECIFIC_OPTIONS select SSE2 select UDELAY_LAPIC select SMM_TSEG - select MICROCODE_IN_CBFS + select CPU_MICROCODE_IN_CBFS #select AP_IN_SIPI_WAIT select TSC_SYNC_MFENCE diff --git a/src/cpu/intel/model_206ax/Makefile.inc b/src/cpu/intel/model_206ax/Makefile.inc index e9b8e6df8e..6ab4840c48 100644 --- a/src/cpu/intel/model_206ax/Makefile.inc +++ b/src/cpu/intel/model_206ax/Makefile.inc @@ -5,4 +5,6 @@ ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.c smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c +cpu_microcode-$(CONFIG_CPU_MICROCODE_CBFS_GENERATE) += microcode_blob.c + cpu_incs += $(src)/cpu/intel/model_206ax/cache_as_ram.inc diff --git a/src/cpu/intel/microcode/microcode_blob.c b/src/cpu/intel/model_206ax/microcode_blob.c index 69238a9f77..c2538e8ede 100644 --- a/src/cpu/intel/microcode/microcode_blob.c +++ b/src/cpu/intel/model_206ax/microcode_blob.c @@ -18,5 +18,5 @@ */ unsigned microcode[] = { -#include <microcode_blob.h> +#include "microcode_blob.h" }; |