Commit c9150a8a authored by Marc Zyngier's avatar Marc Zyngier
Browse files

KVM: arm64: Enable FP8 support when available and configured 



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: default avatarMark Brown <broonie@kernel.org>
Tested-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240820131802.3547589-8-maz@kernel.org


Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 6d730765

arch/arm64/kvm/sys_regs.c

+3 −0
Original line number Diff line number Diff line
@@ -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))