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refactor(context mgmt): add cm_prepare_el3_exit_ns function

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As part of the RFC:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/13651,
this patch adds the 'cm_prepare_el3_exit_ns' function. The function is
a wrapper to 'cm_prepare_el3_exit' function for Non-secure state.

When EL2 sysregs context exists (CTX_INCLUDE_EL2_REGS is
enabled) EL1 and EL2 sysreg values are restored from the context
instead of directly updating the registers.

Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I9b071030576bb05500d54090e2a03b3f125d1653
This commit is contained in:
Zelalem Aweke 2022-01-31 16:59:42 -06:00 • committed by Joanna Farley
parent fd5da7a847
commit 8b95e84870
8 changed files with 94 additions and 18 deletions
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3
include/lib/el3_runtime/context_mgmt.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2013-2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -34,6 +34,7 @@ void cm_init_context_by_index(unsigned int cpu_idx,
const struct entry_point_info *ep);
void cm_setup_context(cpu_context_t *ctx, const struct entry_point_info *ep);
void cm_prepare_el3_exit(uint32_t security_state);
void cm_prepare_el3_exit_ns(void);
#ifdef __aarch64__
#if CTX_INCLUDE_EL2_REGS