From 6615c6eaf798556b94ecc44d241222d6b19cd119 Mon Sep 17 00:00:00 2001 From: Shelley Chen Date: Tue, 27 Oct 2020 15:58:31 -0700 Subject: mrc_cache: Move code for triggering memory training into mrc_cache Currently the decision of whether or not to use mrc_cache in recovery mode is made within the individual platforms' drivers (ie: fsp2.0, fsp1.1, etc.). As this is not platform specific, but uses common vboot infrastructure, the code can be unified and moved into mrc_cache. The conditions are as follows: 1. If HAS_RECOVERY_MRC_CACHE, use mrc_cache data (unless retrain switch is true) 2. If !HAS_RECOVERY_MRC_CACHE && VBOOT_STARTS_IN_BOOTBLOCK, this means that memory training will occur after verified boot, meaning that mrc_cache will be filled with data from executing RW code. So in this case, we never want to use the training data in the mrc_cache for recovery mode. 3. If !HAS_RECOVERY_MRC_CACHE && VBOOT_STARTS_IN_ROMSTAGE, this means that memory training happens before verfied boot, meaning that the mrc_cache data is generated by RO code, so it is safe to use for a recovery boot. 4. Any platform that does not use vboot should be unaffected. Additionally, we have removed the MRC_CLEAR_NORMAL_CACHE_ON_RECOVERY_RETRAIN config because the mrc_cache driver takes care of invalidating the mrc_cache data for normal mode. If the platform: 1. !HAS_RECOVERY_MRC_CACHE, always invalidate mrc_cache data 2. HAS_RECOVERY_MRC_CACHE, only invalidate if retrain switch is set BUG=b:150502246 BRANCH=None TEST=1. run dut-control power_state:rec_force_mrc twice on lazor ensure that memory retraining happens both times run dut-control power_state:rec twice on lazor ensure that memory retraining happens only first time 2. remove HAS_RECOVERY_MRC_CACHE from lazor Kconfig boot twice to ensure caching of memory training occurred on each boot. Change-Id: I3875a7b4a4ba3c1aa8a3c1507b3993036a7155fc Signed-off-by: Shelley Chen Reviewed-on: https://review.coreboot.org/c/coreboot/+/46855 Reviewed-by: Furquan Shaikh Tested-by: build bot (Jenkins) --- src/mainboard/google/eve/Kconfig | 1 - 1 file changed, 1 deletion(-) (limited to 'src/mainboard/google/eve/Kconfig') diff --git a/src/mainboard/google/eve/Kconfig b/src/mainboard/google/eve/Kconfig index 9316c7f213..ece0119a3e 100644 --- a/src/mainboard/google/eve/Kconfig +++ b/src/mainboard/google/eve/Kconfig @@ -28,7 +28,6 @@ config VBOOT select EC_GOOGLE_CHROMEEC_SWITCHES select HAS_RECOVERY_MRC_CACHE select VBOOT_LID_SWITCH - select MRC_CLEAR_NORMAL_CACHE_ON_RECOVERY_RETRAIN config CHROMEOS select DSAR_ENABLE -- cgit v1.2.3