diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2015-10-26 08:34:09 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-12-14 11:30:41 +0000 |
| commit | c13d1683df16db16c91372177ca10c31677b5ed5 (patch) | |
| tree | c33ebab7d9dff4a45664c47edda215838ed5c5b7 /arch/arm64/kvm/hyp/switch.c | |
| parent | be901e9b15cd2c8e48dc089b4655ea4a076e66fd (diff) | |
arm64: KVM: Implement fpsimd save/restore
Implement the fpsimd save restore, keeping the lazy part in
assembler (as returning to C would be overkill).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/kvm/hyp/switch.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/switch.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 79f59c98b148..608155f5b856 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -89,6 +89,7 @@ int __hyp_text __guest_run(struct kvm_vcpu *vcpu) { struct kvm_cpu_context *host_ctxt; struct kvm_cpu_context *guest_ctxt; + bool fp_enabled; u64 exit_code; vcpu = kern_hyp_va(vcpu); @@ -118,6 +119,8 @@ int __hyp_text __guest_run(struct kvm_vcpu *vcpu) exit_code = __guest_enter(vcpu, host_ctxt); /* And we're baaack! */ + fp_enabled = __fpsimd_enabled(); + __sysreg_save_state(guest_ctxt); __sysreg32_save_state(vcpu); __timer_save_state(vcpu); @@ -128,6 +131,11 @@ int __hyp_text __guest_run(struct kvm_vcpu *vcpu) __sysreg_restore_state(host_ctxt); + if (fp_enabled) { + __fpsimd_save_state(&guest_ctxt->gp_regs.fp_regs); + __fpsimd_restore_state(&host_ctxt->gp_regs.fp_regs); + } + __debug_save_state(vcpu, kern_hyp_va(vcpu->arch.debug_ptr), guest_ctxt); __debug_cond_restore_host_state(vcpu); |