arm-trusted-firmware/docs/getting_started
johpow01 6cac724d52 Enable v8.6 WFE trap delays
This patch enables the v8.6 extension to add a delay before WFE traps
are taken. A weak hook plat_arm_set_twedel_scr_el3 has been added in
plat/common/aarch64/plat_common.c that disables this feature by default
but platform-specific code can override it when needed.

The only hook provided sets the TWED fields in SCR_EL3, there are similar
fields in HCR_EL2, SCTLR_EL2, and SCTLR_EL1 to control WFE trap delays in
lower ELs but these should be configured by code running at EL2 and/or EL1
depending on the platform configuration and is outside the scope of TF-A.

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I0a9bb814205efeab693a3d0a0623e62144abba2d
2020-05-19 21:49:52 +00:00
..
build-options.rst plat/arm/fvp: Support performing SDEI platform setup in runtime 2020-05-15 10:05:06 -05:00
docs-build.rst Add support for documentation build as a target in Makefile 2020-01-29 06:26:09 -06:00
image-terminology.rst doc: Misc syntax and spelling fixes 2019-10-11 12:39:06 +00:00
index.rst doc: Split the User Guide into multiple files 2019-11-27 10:45:54 +00:00
initial-build.rst Set lld as the default linker for Clang builds 2020-01-17 16:48:18 +00:00
porting-guide.rst Enable v8.6 WFE trap delays 2020-05-19 21:49:52 +00:00
prerequisites.rst Necessary fix in drivers to upgrade to mbedtls-2.18.0 2020-03-08 00:33:10 -06:00
psci-lib-integration-guide.rst docs: Update SMCCC doc, other changes for release 2020-04-16 10:03:39 -05:00
rt-svc-writers-guide.rst docs: Update SMCCC doc, other changes for release 2020-04-16 10:03:39 -05:00
tools-build.rst docs: Update docs with firmware encryption feature 2020-03-09 20:48:17 +05:30