mb/google/rex: Enable asynchronous End-Of-Post
Set the `SOC_INTEL_CSE_SEND_EOP_ASYNC' flag to request End-Of-Post
right after PCI enumeration and handle the command response at
`BS_PAYLOAD_BOOT'.
With these settings we have observed a boot time reduction of about
100ms on google/rex.
TEST=Tests on google/rex with `SOC_INTEL_CSE_SEND_EOP_ASYNC' show
End-Of-Post after PCI initialization and EOP message received at
`BS_PAYLOAD_BOOT'.
Change-Id: I27b540eeddcada521eba91fcc51504831d6dc855
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74562
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index 62ece95..528a2dc 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -27,6 +27,7 @@
select PMC_IPC_ACPI_INTERFACE
select SOC_INTEL_CSE_LITE_SKU
select SOC_INTEL_CSE_PRE_CPU_RESET_TELEMETRY_V2
+ select SOC_INTEL_CSE_SEND_EOP_ASYNC
config BOARD_GOOGLE_BASEBOARD_REX
def_bool n