GNUBoot/coreboot-kgpe-d16
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coreboot-kgpe-d16/src/include
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Jeremy Compostella 4a2ce029fb cpu/x86/mp_init: Use clflush to write SIPI data back to RAM 
Improve boot time performances by replacing the wbinvd instruction
with multiple clflush to ensure that the SIPI data is written back to
RAM.

According to some experimental measurements, the wbinvd execution
takes between 1.6 up and 6 milliseconds to complete. In the case of
the SIPI data, wbinvd unnecessarily flushes and invalidates the entire
cache. Indeed, the SIPI module is quite small (about 400 bytes) and
cflush'ing the associated cache lines is almost instantaneous,
typically less than 100 microseconds.

BUG=b/260455826
TEST=Successful boot on Skolas and Rex board

Change-Id: I0e00db8eaa6a3cb41bec3422572c8f2a9bec4057
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Suggested-by: Erin Park <erin.park@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75391
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2023-05-31 14:22:31 +00:00
..
acpi acpi/acpigen: rename and clarify bus/IO/MMIO resource producer functions 2023-05-30 16:05:35 +00:00
boot lib/coreboot_table: Rename lb_fill_pcie 2022-11-04 19:17:49 +00:00
console console: Add format-checking __printf() to die() 2023-05-17 11:23:59 +00:00
cpu cpu/x86/mp_init: Use clflush to write SIPI data back to RAM 2023-05-31 14:22:31 +00:00
device treewide: Remove 'extern' from functions declaration 2023-05-26 13:45:24 +00:00
efi include/efi: Add EFI Status code definitions 2022-03-25 19:26:28 +00:00
mipi drivers/soundwire/cs42l42: Support CS42L42 SoundWire device 2023-05-25 21:22:32 +00:00
pc80 drivers/pc80/rtc/mc146818rtc.c: Add Kconfig for RTC CMOS base addresses 2023-05-08 17:51:08 +00:00
smp include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
superio
sys include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
adainit.h Add option to use Ada code in romstage 2022-12-17 20:48:06 +00:00
asan.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
assert.h treewide: Remove 'extern' from functions declaration 2023-05-26 13:45:24 +00:00
b64_decode.h
base3.h
boardid.h
boot_device.h
bootblock_common.h
bootmem.h lib: set up specific purpose memory as LB_MEM_SOFT_RESERVED 2023-03-03 11:10:38 +00:00
bootmode.h mb/google,samsung: Drop init_bootmode_straps() 2022-04-09 02:50:01 +00:00
bootsplash.h
bootstate.h include/bootstate.h: Fail compilation on invalid bootstate hooks 2023-02-04 01:42:31 +00:00
cbfs.h commonlib/bsd: Remove cb_err_t 2022-03-09 02:18:21 +00:00
cbfs_glue.h vboot: Add VBOOT_CBFS_INTEGRATION support 2022-11-08 23:03:49 +00:00
cbmem.h cbmem_top_chipset: Change the return value to uintptr_t 2022-11-18 16:00:45 +00:00
cper.h include/cper.h: Add CPER Memory Error Section definitions 2022-12-09 03:46:33 +00:00
crc_byte.h
ctype.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
delay.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
device_tree.h tree: Drop repeated words 2023-02-07 04:37:31 +00:00
dimm_info_util.h arch/x86: Refactor the SMBIOS type 17 write function 2021-11-11 09:10:10 +00:00
dp_aux.h google/trogdor: Add backlight support for Parade ps8640 2021-11-02 08:17:21 +00:00
edid.h
elog.h treewide: Remove 'extern' from functions declaration 2023-05-26 13:45:24 +00:00
endian.h
espi.h include/espi.h: Switch to types.h 2022-03-27 15:13:31 +00:00
fallback.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
fit.h
fmap.h
framebuffer_info.h src: Remove unused <stdbool> 2022-01-19 15:15:50 +00:00
fw_config.h lib: add stub for fw_config_get_field 2022-12-24 05:50:00 +00:00
gpio.h soc/intel/common/gpio: Add function to read GPIO TX value 2023-01-25 14:33:06 +00:00
halt.h
identity.h lib/version: Move board identification strings 2023-04-22 16:20:49 +00:00
imd.h
imd_private.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
input-event-codes.h
inttypes.h
ip_checksum.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
kconfig.h
lib.h lib: Add __fls() (Find Last Set) 2021-12-13 02:57:07 +00:00
limits.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
list.h lib/list: Add list_append 2021-11-03 08:29:16 +00:00
main_decl.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
memlayout.h treewide: stop calling custom TPM log "TCPA" 2023-01-11 16:00:55 +00:00
memory_info.h include/memory_info.h: Add soc_num to dimm_info struct 2023-01-08 01:33:23 +00:00
memrange.h include/memrange.h: Remove trailing semicolon 2022-09-28 16:12:04 +00:00
metadata_hash.h
mrc_cache.h
nhlt.h lib/nhlt, soc/intel/skl: Update NHLT to program feedback config 2022-12-21 13:57:48 +00:00
option.h
post.h treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
program_loading.h lib/program_loaders.c: Mark run_ramstage with __noreturn 2022-07-14 23:10:17 +00:00
ramdetect.h
random.h arch/x86: Use 'enum cb_err' 2022-12-25 15:09:16 +00:00
reg_script.h include/reg_script.h: Remove trailing semicolon 2022-09-28 16:12:24 +00:00
region_file.h
reset.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
rmodule.h
romstage_common.h arch/x86: Add a common romstage entry 2022-06-07 12:54:39 +00:00
romstage_handoff.h
rtc.h
rules.h console: Print architecture 2023-01-31 15:26:16 +00:00
sar.h vc/google/chromeos: use fw_config field to return sar filename 2022-12-24 05:50:13 +00:00
sdram_mode.h
smbios.h arch/x86/smbios: Replace SMBIOS type4 processor upgrade fields 2023-01-08 01:27:14 +00:00
smmstore.h drivers/smmstore: Expose region device 2023-02-12 08:20:08 +00:00
spd.h spd.h: Move enum ddr3_module_type to ddr3.h 2023-01-04 12:39:32 +00:00
spd_bin.h lib: Add LPDDR5x DRAM type 2022-11-07 02:29:23 +00:00
spd_cache.h
spi-generic.h drivers/spi/spi-generic: document SPI_CNTRLR_DEDUCT_CMD_LEN better 2021-12-15 22:39:21 +00:00
spi_bitbang.h
spi_flash.h
spi_sdcard.h
stage_cache.h
stdarg.h
stdbool.h
stddef.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
stdint.h
stdio.h
stdlib.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
string.h treewide: Add 'IWYU pragma: export' comment 2022-11-03 13:05:17 +00:00
swab.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
symbols.h treewide: stop calling custom TPM log "TCPA" 2023-01-11 16:00:55 +00:00
thread.h rules.h: Use more consistent naming 2022-05-16 21:52:22 +00:00
timer.h timer: Change timer util functions to 64-bit 2022-09-14 11:55:39 +00:00
timestamp.h timestamp: Allow timestamp_add to accept a negative number 2022-01-21 22:42:19 +00:00
types.h treewide: Add 'IWYU pragma: export' comment 2022-11-03 13:05:17 +00:00
uuid.h
vbe.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
version.h lib/version: Move board identification strings 2023-04-22 16:20:49 +00:00
watchdog.h include: Add SPDX-License-Identifiers to files missing them 2022-08-01 13:59:11 +00:00
wrdd.h
xxhash.h lib/xxhash.c: Add new hash functions 2022-09-07 22:24:51 +00:00