[PATCH 5/6] KVM: assigned dev: Clean up assigned_device's flag

[Sheng Yang <sheng@linux.intel.com>]

Reuse KVM_DEV_ASSIGN_ENABLE_IOMMU for an in-kernel struct didn't make much
sense.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
 include/linux/kvm_host.h |    1 +
 virt/kvm/assigned-dev.c  |    7 ++++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 274655b..f09db87 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -500,6 +500,7 @@ struct kvm_guest_msix_entry {
 	u16 flags;
 };
 
+#define KVM_ASSIGNED_ENABLED_IOMMU		(1 << 0)
 struct kvm_assigned_dev_kernel {
 	struct kvm_irq_ack_notifier ack_notifier;
 	struct work_struct interrupt_work;
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index 7c98928..5c6b96d 100644
--- a/virt/kvm/assigned-dev.c
+++ b/virt/kvm/assigned-dev.c
@@ -552,7 +552,8 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
 	match->host_segnr = assigned_dev->segnr;
 	match->host_busnr = assigned_dev->busnr;
 	match->host_devfn = assigned_dev->devfn;
-	match->flags = assigned_dev->flags;
+	if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
+		match->flags |= KVM_ASSIGNED_ENABLED_IOMMU;
 	match->dev = dev;
 	spin_lock_init(&match->assigned_dev_lock);
 	match->irq_source_id = -1;
@@ -563,7 +564,7 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
 
 	list_add(&match->list, &kvm->arch.assigned_dev_head);
 
-	if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
+	if (assigned_dev->flags & KVM_ASSIGNED_ENABLED_IOMMU) {
 		if (!kvm->arch.iommu_domain) {
 			r = kvm_iommu_map_guest(kvm);
 			if (r)
@@ -609,7 +610,7 @@ static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
 		goto out;
 	}
 
-	if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
+	if (match->flags & KVM_ASSIGNED_ENABLED_IOMMU)
 		kvm_deassign_device(kvm, match);
 
 	kvm_free_assigned_device(kvm, match);
-- 
1.7.0.1