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fix(cpufeat): add feat_hcx check before enabling FEAT_MOPS

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This patch also checks for FEAT_HCX before enabling FEAT_MOPS
when INIT_UNUSED_NS_EL1 = 1 and adds build dependency check.

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: Iff4a068aa392fc8d29e2e4da7a2e7df0b3104e65
This commit is contained in:
Arvind Ram Prakash 2025-03-12 16:45:05 -05:00
parent a7d150757f
commit 484befbfcb
2 changed files with 9 additions and 1 deletions
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8
Makefile
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@ -1021,6 +1021,14 @@ ifeq (${ENABLE_SVE_FOR_SWD},1)
endif endif
endif endif
# Enabling FEAT_MOPS requires access to hcrx_el2 registers which is
# available only when FEAT_HCX is enabled.
ifneq (${ENABLE_FEAT_MOPS},0)
ifeq (${ENABLE_FEAT_HCX},0)
$(error "ENABLE_FEAT_MOPS requires ENABLE_FEAT_HCX")
endif
endif
# Enabling SVE for both the worlds typically requires the context # Enabling SVE for both the worlds typically requires the context
# management of SVE registers. The only exception being SPMC at S-EL2. # management of SVE registers. The only exception being SPMC at S-EL2.
ifeq (${ENABLE_SVE_FOR_SWD}, 1) ifeq (${ENABLE_SVE_FOR_SWD}, 1)

2
lib/el3_runtime/aarch64/context_mgmt.c
View file

@ -905,7 +905,7 @@ static void manage_extensions_nonsecure_el2_unused(void)
sme_init_el2_unused(); sme_init_el2_unused();
} }
if (is_feat_mops_supported()) { if (is_feat_mops_supported() && is_feat_hcx_supported()) {
write_hcrx_el2(read_hcrx_el2() | HCRX_EL2_MSCEn_BIT); write_hcrx_el2(read_hcrx_el2() | HCRX_EL2_MSCEn_BIT);
} }