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soc/intel/meteorlake: Allow possible options for MP Init 

Ported back from commit ceaf9d1169 ("soc/intel/alderlake:
Allow possible options for MP Init")

This patch creates choice that lists all possible options to perform
MP Init as below for Intel Meteor Lake platform:
1. MTL_USE_FSP_MP_INIT: Allow coreboot to bring APs from reset and FSP
runs feature programming based and selects MP_SERVICES_PPI_V2 config.
2. MTL_USE_COREBOOT_MP_INIT: Allow coreboot to perform MP Init (both AP
init and feature programming) using native implementation.
Additionally, selects required RELOAD_MICROCODE_PATCH when coreboot
is expected to run MP Init.

Refactor SoC code to allow required FSP UPD override based on
selected MP Init option.

Additionally, added `FIXME` comment to ensure Intel MTL FSP can bring
back SkipMpInit UPD in MTL to let coreboot override this UPD and ensure
independent MP Init flow.

BUG=b:219053812
TEST=Able to build google/rex.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ic917e4e03e24d73190cfc72c6ed8e59af427bedf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65743
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik 2022-07-09 22:41:48 +00:00 committed by Felix Held
parent 0d6d228fbc
commit 7c4789d42b
2 changed files with 32 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/soc/intel/meteorlake/Kconfig
View File

@ -38,7 +38,6 @@ config CPU_SPECIFIC_OPTIONS
select IOAPIC
select MICROCODE_BLOB_UNDISCLOSED
select MRC_SETTINGS_PROTECT
select MP_SERVICES_PPI_V2
select PARALLEL_MP_AP_WORK
select PLATFORM_USES_FSP2_3
select PMC_GLOBAL_RESET_ENABLE_LOCK
@ -308,4 +307,22 @@ config SOC_INTEL_GFX_FRAMEBUFFER_OFFSET
hex
default 0x800000
choice
prompt "Multiprocessor (MP) Initialization configuration to use"
default MTL_USE_FSP_MP_INIT
config MTL_USE_FSP_MP_INIT
bool "Use FSP MP init"
select MP_SERVICES_PPI_V2
help
Upon selection, coreboot brings APs from reset and the FSP runs feature programming.
config MTL_USE_COREBOOT_MP_INIT
bool "Use coreboot MP init"
select RELOAD_MICROCODE_PATCH
help
Upon selection, coreboot performs MP Init.
endchoice
endif

16
src/soc/intel/meteorlake/fsp_params.c
View File

@ -133,9 +133,21 @@ static void fill_fsps_cpu_params(FSP_S_CONFIG *s_cfg,
s_cfg->MicrocodeRegionSize = (uint32_t)microcode_len;
}
/* Use coreboot MP PPI services if Kconfig is enabled */
if (CONFIG(USE_INTEL_FSP_TO_CALL_COREBOOT_PUBLISH_MP_PPI))
if (CONFIG(MTL_USE_FSP_MP_INIT)) {
/*
* Use FSP running MP PPI services to perform CPU feature programming
* if Kconfig is enabled
*/
s_cfg->CpuMpPpi = (uintptr_t) mp_fill_ppi_services_data();
} else {
/* Use coreboot native driver to perform MP init by default */
s_cfg->CpuMpPpi = (uintptr_t)NULL;
/*
* FIXME: Bring back SkipMpInit UPD in MTL FSP to let coreboot perform
* AP programming independently.
*/
// s_cfg->SkipMpInit = !CONFIG(USE_INTEL_FSP_MP_INIT);
}
}