KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_sregs

Move vcpu_load() and vcpu_put() into the architecture specific
implementations of kvm_arch_vcpu_ioctl_set_sregs().
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/powerpc/kvm/book3s.c

@@ -496,7 +496,13 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs)
 {
-	return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
+	int ret;
+
+	vcpu_load(vcpu);
+	ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
+	vcpu_put(vcpu);
+
+	return ret;
 }
 
 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)

arch/powerpc/kvm/booke.c

@@ -1630,20 +1630,25 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
                                   struct kvm_sregs *sregs)
 {
-	int ret;
+	int ret = -EINVAL;
 
+	vcpu_load(vcpu);
 	if (vcpu->arch.pvr != sregs->pvr)
-		return -EINVAL;
+		goto out;
 
 	ret = set_sregs_base(vcpu, sregs);
 	if (ret < 0)
-		return ret;
+		goto out;
 
 	ret = set_sregs_arch206(vcpu, sregs);
 	if (ret < 0)
-		return ret;
+		goto out;
+
+	ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 
-	return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
+out:
+	vcpu_put(vcpu);
+	return ret;
 }
 
 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,

arch/s390/kvm/kvm-s390.c

@@ -2726,8 +2726,12 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs)
 {
+	vcpu_load(vcpu);
+
 	memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
 	memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
+
+	vcpu_put(vcpu);
 	return 0;
 }
 

arch/x86/kvm/x86.c

@@ -7525,15 +7525,18 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 	int mmu_reset_needed = 0;
 	int pending_vec, max_bits, idx;
 	struct desc_ptr dt;
+	int ret = -EINVAL;
+
+	vcpu_load(vcpu);
 
 	if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) &&
 			(sregs->cr4 & X86_CR4_OSXSAVE))
-		return -EINVAL;
+		goto out;
 
 	apic_base_msr.data = sregs->apic_base;
 	apic_base_msr.host_initiated = true;
 	if (kvm_set_apic_base(vcpu, &apic_base_msr))
-		return -EINVAL;
+		goto out;
 
 	dt.size = sregs->idt.limit;
 	dt.address = sregs->idt.base;
@@ -7599,7 +7602,10 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 
 	kvm_make_request(KVM_REQ_EVENT, vcpu);
 
-	return 0;
+	ret = 0;
+out:
+	vcpu_put(vcpu);
+	return ret;
 }
 
 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,

virt/kvm/kvm_main.c

@@ -2628,9 +2628,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
 			kvm_sregs = NULL;
 			goto out;
 		}
-		vcpu_load(vcpu);
 		r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs);
-		vcpu_put(vcpu);
 		break;
 	}
 	case KVM_GET_MP_STATE: {