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[v4,7/8] KVM: arm64: Enable FP8 support when available and configured

Message ID 20240820131802.3547589-8-maz@kernel.org (mailing list archive)
State New
Headers show
Series KVM: arm64: Add support for FP8 | expand

Commit Message

Marc Zyngier Aug. 20, 2024, 1:18 p.m. UTC 
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.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/sys_regs.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 4c2f7c0af537..51627add0a72 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -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))