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soc/intel/cannonlake: Allow coreboot to handle SPI lockdown 

This patch disables FSP-S SPI lockdown UPDs and lets coreboot perform
SPI lockdown (i.e.flash register DLOCK, FLOCKDN, and WRSDIS before
end of post) in ramstage.

BUG=b:138200201
TEST=FSP debug build suggests those UPDs are disable now.

Change-Id: Id7a6b9859e058b9f1ec1bd45d2c388c02b8ac18c
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35299
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: V Sowmya <v.sowmya@intel.com>
This commit is contained in:
Subrata Banik 2019-09-09 09:37:06 +05:30 committed by Patrick Georgi
parent aa8d7721d4
commit 13e902d571
1 changed files with 6 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/soc/intel/cannonlake/fsp_params.c
View File

@ -421,31 +421,29 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
tconfig->PchLockDownBiosInterface = 0;
params->PchLockDownBiosLock = 0;
params->PchLockDownRtcMemoryLock = 0;
#if CONFIG(SOC_INTEL_COMETLAKE)
/*
* TODO: Disable SpiFlashCfgLockDown config after FSP provides
* dedicated UPD
*
* Skip SPI Flash Lockdown from inside FSP.
* Making this config "0" means FSP won't set the FLOCKDN bit
* of SPIBAR + 0x04 (i.e., Bit 15 of BIOS_HSFSTS_CTL).
* So, it becomes coreboot's responsibility to set this bit
* before end of POST for security concerns.
*/
// params->SpiFlashCfgLockDown = 0;
params->SpiFlashCfgLockDown = 0;
#endif
} else {
tconfig->PchLockDownGlobalSmi = 1;
tconfig->PchLockDownBiosInterface = 1;
params->PchLockDownBiosLock = 1;
params->PchLockDownRtcMemoryLock = 1;
#if CONFIG(SOC_INTEL_COMETLAKE)
/*
* TODO: Enable SpiFlashCfgLockDown config after FSP provides
* dedicated UPD
*
* Enable SPI Flash Lockdown from inside FSP.
* Making this config "1" means FSP will set the FLOCKDN bit
* of SPIBAR + 0x04 (i.e., Bit 15 of BIOS_HSFSTS_CTL).
*/
// params->SpiFlashCfgLockDown = 1;
params->SpiFlashCfgLockDown = 1;
#endif
}
}