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feat(mops): enable FEAT_MOPS in EL3 when INIT_UNUSED_NS_EL2=1

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FEAT_MOPS, mandatory from Arm v8.8, is typically managed in EL2.
However, in configurations where NS_EL2 is not enabled,
EL3 must set the HCRX_EL2.MSCEn bit to 1 to enable the feature.

This patch ensures FEAT_MOPS is enabled by setting HCRX_EL2.MSCEn to 1.

Change-Id: Ic4960e0cc14a44279156b79ded50de475b3b21c5
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
This commit is contained in:
Arvind Ram Prakash 2025-01-09 17:18:30 -06:00
parent 624ffe51ea
commit 6b8df7b9e5
8 changed files with 48 additions and 1 deletions
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8
common/feat_detect.c
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@ -286,6 +286,12 @@ static unsigned int read_feat_fpmr_id_field(void)
ID_AA64PFR2_EL1_FPMR_MASK);
}
static unsigned int read_feat_mops_id_field(void)
{
return ISOLATE_FIELD(read_id_aa64isar2_el1(), ID_AA64ISAR2_EL1_MOPS_SHIFT,
ID_AA64ISAR2_EL1_MOPS_MASK);
}
/***********************************************************************************
* TF-A supports many Arm architectural features starting from arch version
* (8.0 till 8.7+). These features are mostly enabled through build flags. This
@ -343,6 +349,8 @@ void detect_arch_features(void)
check_feature(ENABLE_FEAT_DIT, read_feat_dit_id_field(), "DIT", 1, 1);
check_feature(ENABLE_FEAT_AMU, read_feat_amu_id_field(),
"AMUv1", 1, 2);
check_feature(ENABLE_FEAT_MOPS, read_feat_mops_id_field(),
"MOPS", 1, 1);
check_feature(ENABLE_FEAT_MPAM, read_feat_mpam_version(),
"MPAM", 1, 17);
check_feature(CTX_INCLUDE_NEVE_REGS, read_feat_nv_id_field(),