Re: [PATCH 4/8] KVM: arm64: Remove VHE host restore of CPACR_EL1.SMEN

On Tue, Feb 04, 2025 at 03:20:56PM +0000, Mark Rutland wrote:

When KVM is in VHE mode, the host kernel tries to save and restore the configuration of CPACR_EL1.SMEN (i.e. CPTR_EL2.SMEN when HCR_EL2.E2H=1) across kvm_arch_vcpu_load_fp() and kvm_arch_vcpu_put_fp(), since the configuration may be clobbered by hyp when running a vCPU. This logic has historically been broken, and is currently redundant.

Reviewed-by: Mark Brown broonie@kernel.org