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| author | Johann Scott <johann.scott@arm.com> | 2026-06-23 14:12:37 +0000 |
|---|---|---|
| committer | johann.scott <johann.scott@arm.com> | 2026-07-02 08:27:26 +0000 |
| commit | cdb7cb965e6a5201a868a7cca33171a951c35c3f (patch) | |
| tree | 1aa0c6f98979d5be272db7efbd92f950262fcc75 /lib | |
| parent | 5da9bc26bb5bfbb466a092d2169f0c82ea49b938 (diff) | |
| download | arm-trusted-firmware-cdb7cb965e6a5201a868a7cca33171a951c35c3f.tar.gz arm-trusted-firmware-cdb7cb965e6a5201a868a7cca33171a951c35c3f.zip | |
feat(cpufeat): add support for FEAT_SRMASK
FEAT_SRMASK adds a series of aliases and bitwise write masks for
some EL1 controls registers. The purpose of this is to reduce
trapping of EL1 system register accesses to EL2.
This feature can be found in the M.a version of the Arm ARM.
Change-Id: I15e26c4570da070562dec990cc3bacde240d4ad5
Signed-off-by: Johann Scott <johann.scott@arm.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/el3_runtime/aarch64/context_mgmt.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/el3_runtime/aarch64/context_mgmt.c b/lib/el3_runtime/aarch64/context_mgmt.c index 7df22dc37..7d762d937 100644 --- a/lib/el3_runtime/aarch64/context_mgmt.c +++ b/lib/el3_runtime/aarch64/context_mgmt.c @@ -430,6 +430,13 @@ static void setup_ns_context(cpu_context_t *ctx, const struct entry_point_info * scr_el3 |= SCR_HACDBSEn_BIT; } + if (is_feat_srmask_supported()) { + /* Set the SRMASKEn bit to enable access to alias and bitmask + * registers. + */ + scr_el3 |= SCR_SRMASKEn_BIT; + } + write_ctx_reg(state, CTX_SCR_EL3, scr_el3); manage_extensions_nonsecure(ctx); |