pci-assign: Replace kvm_assign_set_msix_nr with kvm_device_msix_init_vectors

The refactored version cleanly hides the KVM IOCTL structure from the
users and also zeros out the padding field.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

5 files changed, 15 insertions, 11 deletions

diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 80ac2fc5a..0e2f8e6aa 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -1045,7 +1045,6 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
     AssignedDevice *adev = DO_UPCAST(AssignedDevice, dev, pci_dev);
     uint16_t entries_nr = 0;
     int i, r = 0;
-    struct kvm_assigned_msix_nr msix_nr;
     struct kvm_assigned_msix_entry msix_entry;
     MSIXTableEntry *entry = adev->msix_table;
 
@@ -1064,9 +1063,7 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
         return 0;
     }
 
-    msix_nr.assigned_dev_id = adev->dev_id;
-    msix_nr.entry_nr = entries_nr;
-    r = kvm_assign_set_msix_nr(kvm_state, &msix_nr);
+    r = kvm_device_msix_init_vectors(kvm_state, adev->dev_id, entries_nr);
     if (r != 0) {
         fprintf(stderr, "fail to set MSI-X entry number for MSIX! %s\n",
 			strerror(-r));
@@ -1078,7 +1075,7 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
     adev->irq_entries_nr = adev->msix_max;
     adev->entry = g_malloc0(adev->msix_max * sizeof(*(adev->entry)));
 
-    msix_entry.assigned_dev_id = msix_nr.assigned_dev_id;
+    msix_entry.assigned_dev_id = adev->dev_id;
     entry = adev->msix_table;
     for (i = 0; i < adev->msix_max; i++, entry++) {
         if (msix_masked(entry)) {
diff --git a/qemu-kvm.c b/qemu-kvm.c
index 8416a8d15..1a2a4fdc3 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -186,11 +186,6 @@ int kvm_get_irq_route_gsi(void)
 }
 
 #ifdef KVM_CAP_DEVICE_MSIX
-int kvm_assign_set_msix_nr(KVMState *s, struct kvm_assigned_msix_nr *msix_nr)
-{
-    return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, msix_nr);
-}
-
 int kvm_assign_set_msix_entry(KVMState *s,
                               struct kvm_assigned_msix_entry *entry)
 {
diff --git a/qemu-kvm.h b/qemu-kvm.h
index c247ad09d..3fd6046f4 100644
--- a/qemu-kvm.h
+++ b/qemu-kvm.h
@@ -66,7 +66,6 @@ int kvm_update_routing_entry(struct kvm_irq_routing_entry *entry,
                              struct kvm_irq_routing_entry *newentry);
 
 
-int kvm_assign_set_msix_nr(KVMState *s, struct kvm_assigned_msix_nr *msix_nr);
 int kvm_assign_set_msix_entry(KVMState *s,
                               struct kvm_assigned_msix_entry *entry);
 
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 789b3612e..8c8eea1b3 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -2162,6 +2162,17 @@ bool kvm_device_msix_supported(KVMState *s)
     return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, NULL) == -EFAULT;
 }
 
+int kvm_device_msix_init_vectors(KVMState *s, uint32_t dev_id,
+                                 uint32_t nr_vectors)
+{
+    struct kvm_assigned_msix_nr msix_nr = {
+        .assigned_dev_id = dev_id,
+        .entry_nr = nr_vectors,
+    };
+
+    return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, &msix_nr);
+}
+
 int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id)
 {
     return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_MSIX |
diff --git a/target-i386/kvm_i386.h b/target-i386/kvm_i386.h
index 6f66b6d7d..aac14eba6 100644
--- a/target-i386/kvm_i386.h
+++ b/target-i386/kvm_i386.h
@@ -28,6 +28,8 @@ int kvm_device_msi_assign(KVMState *s, uint32_t dev_id, int virq);
 int kvm_device_msi_deassign(KVMState *s, uint32_t dev_id);
 
 bool kvm_device_msix_supported(KVMState *s);
+int kvm_device_msix_init_vectors(KVMState *s, uint32_t dev_id,
+                                 uint32_t nr_vectors);
 int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id);
 
 #endif