arm-trusted-firmware/lib/extensions
Boyan Karatotev 0a580b5128 perf(cm): drop ZCR_EL3 saving and some ISBs and replace them with root context
SVE and SME aren't enabled symmetrically for all worlds, but EL3 needs
to context switch them nonetheless. Previously, this had to happen by
writing the enable bits just before reading/writing the relevant
context. But since the introduction of root context, this need not be
the case. We can have these enables always be present for EL3 and save
on some work (and ISBs!) on every context switch.

We can also hoist ZCR_EL3 to a never changing register, as we set its
value to be identical for every world, which happens to be the one we
want for EL3 too.

Change-Id: I3d950e72049a298008205ba32f230d5a5c02f8b0
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
2025-02-25 08:52:06 +00:00
..
amu perf(amu): greatly simplify AMU context management 2025-02-25 08:50:46 +00:00
brbe refactor(cm): change owning security state when a feature is disabled 2025-01-06 07:38:23 +00:00
debug feat(debugv8p9): add support for FEAT_Debugv8p9 2024-07-18 13:49:43 -05:00
fgt feat(fgt2): add support for FEAT_FGT2 2024-07-18 13:49:43 -05:00
fpmr feat(fpmr): disable FPMR trap 2024-12-12 10:03:23 -06:00
mpam refactor(cm): move MPAM3_EL3 reg to per world context 2023-12-21 12:37:21 +00:00
pauth chore(pauth): remove redundant pauth_disable_el3() call 2023-04-28 08:09:14 +01:00
pmuv3 feat(pmuv3): setup per world MDCR_EL3 2025-01-24 10:09:08 +00:00
ras chore: update to use Arm word across TF-A 2023-08-08 15:12:30 +01:00
sme perf(cm): drop ZCR_EL3 saving and some ISBs and replace them with root context 2025-02-25 08:52:06 +00:00
spe fix(cm): change back owning security state when a feature is disabled 2025-01-14 09:06:37 +00:00
sve perf(cm): drop ZCR_EL3 saving and some ISBs and replace them with root context 2025-02-25 08:52:06 +00:00
sys_reg_trace refactor(cm): move EL3 registers to global context 2023-10-31 11:18:42 +00:00
sysreg128 fix: add support for 128-bit sysregs to EL3 crash handler 2025-02-05 21:19:15 +01:00
tcr feat(cm): handle asymmetry for FEAT_TCR2 2024-09-05 16:28:23 +01:00
trbe fix(cm): change back owning security state when a feature is disabled 2025-01-14 09:06:37 +00:00
trf feat(cm): context switch MDCR_EL3 register 2024-06-25 13:50:32 +01:00