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KVM: arm64: Enable FP8 support when available and configured

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If userspace has enabled FP8 support (by setting ID_AA64PFR2_EL1.FPMR
to 1), let's enable the feature by setting HCRX_EL2.EnFPM for the vcpu.

Reviewed-by: Mark Brown <broonie@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240820131802.3547589-8-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier
2024-08-20 14:18:01 +01:00
parent 6d7307651a
commit c9150a8ad9
1 changed files with 3 additions and 0 deletions
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arch/arm64/kvm/sys_regs.c
+3
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@@ -4579,6 +4579,9 @@ void kvm_calculate_traps(struct kvm_vcpu *vcpu)
if (kvm_has_feat(kvm, ID_AA64MMFR3_EL1, TCRX, IMP))
vcpu->arch.hcrx_el2 |= HCRX_EL2_TCR2En;
if (kvm_has_fpmr(kvm))
vcpu->arch.hcrx_el2 |= HCRX_EL2_EnFPM;
}
if (test_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags))