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lib: el3_runtime: Conditionally save/restore EL2 NEVE registers

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Include EL2 registers related to Nested Virtualization in EL2 context
save/restore routines if architecture supports it and platform wants to
use these features in Secure world.

Change-Id: If006ab83bbc2576488686f5ffdff88b91adced5c
Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
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Arunachalam Ganapathy 2020-05-28 11:57:09 +01:00 • committed by Manish Pandey
parent 0f777eabd9
commit 062f8aaf8a
4 changed files with 15 additions and 0 deletions
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docs/getting_started/build-options.rst
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@ -161,6 +161,10 @@ Common build options
registers to be included when saving and restoring the CPU context. Default
is 0.
- ``CTX_INCLUDE_NEVE_REGS``: Boolean option that, when set to 1, will cause the
Armv8.4-NV registers to be saved/restored when entering/exiting an EL2
execution context. Default value is 0.
- ``CTX_INCLUDE_PAUTH_REGS``: Boolean option that, when set to 1, enables
Pointer Authentication for Secure world. This will cause the ARMv8.3-PAuth
registers to be included when saving and restoring the CPU context as