This patch implements host KVM interface to Hyp mode VFP function to
switch out guest and switch in host.
Signed-off-by: Mario Smarduch <m.smarduch@xxxxxxxxxxx>
---
arch/arm/kvm/arm.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index d9631ec..77b41f5 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -105,6 +105,17 @@ void kvm_arch_check_processor_compat(void *rtn)
*(int *)rtn = 0;
}
+/**
+ * kvm_switch_vp_regs() - switch guest/host VFP registers
+ * @vcpu: pointer to vcpu structure.
+ *
+ * HYP interface functions to save guest and restore host VFP registers
+ */
+static void kvm_switch_fp_regs(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.vfp_guest_saved == 1)
+ kvm_call_hyp(__kvm_restore_host_vfp_state, vcpu);
+}
/**
* kvm_arch_init_vm - initializes a VM data structure
@@ -292,6 +303,10 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
+
+ /* Check if Guest accessed VFP registers */
+ kvm_switch_fp_regs(vcpu);
+
/*
* The arch-generic KVM code expects the cpu field of a vcpu to be -1
* if the vcpu is no longer assigned to a cpu. This is used for the
--
1.7.9.5
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