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refactor(context mgmt): refactor EL2 context save and restore functions

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This patch splits the el2_sysregs_context_save/restore functions
into multiple functions based on features. This will allow us to
selectively save and restore EL2 context registers based on
features enabled for a particular configuration.

For now feature build flags are used to decide which registers
to save and restore. The long term plan is to dynamically check
for features that are enabled and then save/restore registers
accordingly. Splitting el2_sysregs_context_save/restore functions
into smaller assembly functions makes that task easier. For more
information please take a look at:
https://trustedfirmware-a.readthedocs.io/en/latest/design_documents/context_mgmt_rework.html

Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I1819a9de8b70fa35c8f45568908025f790c4808c
This commit is contained in:
Zelalem Aweke 2022-04-04 17:42:48 -05:00 • committed by Manish Pandey
parent 65a5e1c04d
commit d20052f33a
4 changed files with 340 additions and 147 deletions
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50
include/lib/el3_runtime/aarch64/context.h
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@ -509,9 +509,53 @@ void el1_sysregs_context_save(el1_sysregs_t *regs);
void el1_sysregs_context_restore(el1_sysregs_t *regs);
#if CTX_INCLUDE_EL2_REGS
void el2_sysregs_context_save(el2_sysregs_t *regs);
void el2_sysregs_context_restore(el2_sysregs_t *regs);
#endif
void el2_sysregs_context_save_common(el2_sysregs_t *regs);
void el2_sysregs_context_restore_common(el2_sysregs_t *regs);
#if ENABLE_SPE_FOR_LOWER_ELS
void el2_sysregs_context_save_spe(el2_sysregs_t *regs);
void el2_sysregs_context_restore_spe(el2_sysregs_t *regs);
#endif /* ENABLE_SPE_FOR_LOWER_ELS */
#if CTX_INCLUDE_MTE_REGS
void el2_sysregs_context_save_mte(el2_sysregs_t *regs);
void el2_sysregs_context_restore_mte(el2_sysregs_t *regs);
#endif /* CTX_INCLUDE_MTE_REGS */
#if ENABLE_MPAM_FOR_LOWER_ELS
void el2_sysregs_context_save_mpam(el2_sysregs_t *regs);
void el2_sysregs_context_restore_mpam(el2_sysregs_t *regs);
#endif /* ENABLE_MPAM_FOR_LOWER_ELS */
#if ENABLE_FEAT_FGT
void el2_sysregs_context_save_fgt(el2_sysregs_t *regs);
void el2_sysregs_context_restore_fgt(el2_sysregs_t *regs);
#endif /* ENABLE_FEAT_FGT */
#if ENABLE_FEAT_ECV
void el2_sysregs_context_save_ecv(el2_sysregs_t *regs);
void el2_sysregs_context_restore_ecv(el2_sysregs_t *regs);
#endif /* ENABLE_FEAT_ECV */
#if ENABLE_FEAT_VHE
void el2_sysregs_context_save_vhe(el2_sysregs_t *regs);
void el2_sysregs_context_restore_vhe(el2_sysregs_t *regs);
#endif /* ENABLE_FEAT_VHE */
#if RAS_EXTENSION
void el2_sysregs_context_save_ras(el2_sysregs_t *regs);
void el2_sysregs_context_restore_ras(el2_sysregs_t *regs);
#endif /* RAS_EXTENSION */
#if CTX_INCLUDE_NEVE_REGS
void el2_sysregs_context_save_nv2(el2_sysregs_t *regs);
void el2_sysregs_context_restore_nv2(el2_sysregs_t *regs);
#endif /* CTX_INCLUDE_NEVE_REGS */
#if ENABLE_TRF_FOR_NS
void el2_sysregs_context_save_trf(el2_sysregs_t *regs);
void el2_sysregs_context_restore_trf(el2_sysregs_t *regs);
#endif /* ENABLE_TRF_FOR_NS */
#if ENABLE_FEAT_CSV2_2
void el2_sysregs_context_save_csv2(el2_sysregs_t *regs);
void el2_sysregs_context_restore_csv2(el2_sysregs_t *regs);
#endif /* ENABLE_FEAT_CSV2_2 */
#if ENABLE_FEAT_HCX
void el2_sysregs_context_save_hcx(el2_sysregs_t *regs);
void el2_sysregs_context_restore_hcx(el2_sysregs_t *regs);
#endif /* ENABLE_FEAT_HCX */
#endif /* CTX_INCLUDE_EL2_REGS */
#if CTX_INCLUDE_FPREGS
void fpregs_context_save(fp_regs_t *regs);