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authorSubrata Banik <subrata.banik@intel.com>2017-07-10 13:17:09 +0530
committerDuncan Laurie <dlaurie@chromium.org>2017-07-12 04:00:41 +0000
commit3214bc4ecca20bb44aa9a94f164c7fb4feb76c0b (patch)
tree4b71cc01671c31f60fe333f254540d6205c16633 /src
parentb5c5b9dc7cb211003d6a453167492eb25ec511c0 (diff)
downloadcoreboot-3214bc4ecca20bb44aa9a94f164c7fb4feb76c0b.tar.xz
soc/intel/skylake: Remove “disable SaGv” in recovery mode flow
This reverts commit 5535cead (intel/skylake: Disable SaGv in recovery mode). Commit 5535cead disables SaGv in recovery mode to save few seconds booting time as we were doing memory training on every recovery flow. Now we don't need to perform MRC training on every recovery boot due to RECOVERY_MRC_CACHE implementation in place. Hence we don't need to define different SaGv policy between Normal (developer) mode and recovery mode to save few seconds. Using different SaGv parameters between recovery and all other mode has some significent drawbacks over warm reboot cycle. We are seeing a MRC traning hang in eve/soraka/poppy devices with below use case. Step 1: Boot system in developer mode (first time RW_MRC training) Step 2: Set recovery_request=1 (using crossystem) and issue “reboot” from OS Step 3: System will perform recovery mode MRC training and boot to OS (first time RECOVERY_MRC training) Step 4: Issue “reboot” from OS console. Step 5: System wil boot in developer mode (using RW_MRC cache) Step 6: Set recovery_request=1 (using crossystem) and issue “reboot” from OS Step 7: System will pick RECOVERY_MRC_CACHE and will hang during MRC training. This patch fixes issue mentioned above and ensures system boot to OS without any hang if we change mode (dev<->recovery) over warm reset. BUG=b:63515071 BRANCH=none TEST=manual stress testing of dev<->recovery mode over warm boot. No MRC hang with this fix on eve/soraka/poppy devices. Change-Id: I8d094a8b6d78ea3bf8f929870a4a179495c29c78 Signed-off-by: Subrata Banik <subrata.banik@intel.com> Reviewed-on: https://review.coreboot.org/20516 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/skylake/romstage/romstage_fsp20.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/src/soc/intel/skylake/romstage/romstage_fsp20.c b/src/soc/intel/skylake/romstage/romstage_fsp20.c
index 4530190b07..093f7c09b9 100644
--- a/src/soc/intel/skylake/romstage/romstage_fsp20.c
+++ b/src/soc/intel/skylake/romstage/romstage_fsp20.c
@@ -203,10 +203,7 @@ static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
m_cfg->TsegSize = CONFIG_SMM_TSEG_SIZE;
m_cfg->IedSize = CONFIG_IED_REGION_SIZE;
m_cfg->ProbelessTrace = config->ProbelessTrace;
- if (vboot_recovery_mode_enabled())
- m_cfg->SaGv = 0; /* Disable SaGv in recovery mode. */
- else
- m_cfg->SaGv = config->SaGv;
+ m_cfg->SaGv = config->SaGv;
m_cfg->UserBd = BOARD_TYPE_ULT_ULX;
m_cfg->RMT = config->Rmt;
m_cfg->DdrFreqLimit = config->DdrFreqLimit;