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| author | Marc Zyngier <maz@kernel.org> | 2024-08-20 15:18:01 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2024-08-27 08:59:27 +0200 |
| commit | c9150a8ad9cdb69584d4ec5af61481df41498eb8 (patch) | |
| tree | 797116bc59e127c01083a0d562261f9f134acc2b /arch/arm64/kvm | |
| parent | KVM: arm64: Expose ID_AA64FPFR0_EL1 as a writable ID reg (diff) | |
| download | linux-c9150a8ad9cdb69584d4ec5af61481df41498eb8.tar.xz linux-c9150a8ad9cdb69584d4ec5af61481df41498eb8.zip | |
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: 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>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 3 |
1 files changed, 3 insertions, 0 deletions
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)) |