pci-assign: Replace kvm_assign_set_msix_entry with kvm_device_msix_set_vector

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, 16 insertions, 17 deletions

diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 0e2f8e6aa..af8a5aa32 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_entry msix_entry;
     MSIXTableEntry *entry = adev->msix_table;
 
     /* Get the usable entry number for allocating */
@@ -1075,7 +1074,6 @@ 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 = adev->dev_id;
     entry = adev->msix_table;
     for (i = 0; i < adev->msix_max; i++, entry++) {
         if (msix_masked(entry)) {
@@ -1098,9 +1096,8 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
 
         kvm_add_routing_entry(kvm_state, &adev->entry[i]);
 
-        msix_entry.gsi = adev->entry[i].gsi;
-        msix_entry.entry = i;
-        r = kvm_assign_set_msix_entry(kvm_state, &msix_entry);
+        r = kvm_device_msix_set_vector(kvm_state, adev->dev_id, i,
+                                       adev->entry[i].gsi);
         if (r) {
             fprintf(stderr, "fail to set MSI-X entry! %s\n", strerror(-r));
             break;
diff --git a/qemu-kvm.c b/qemu-kvm.c
index 1a2a4fdc3..ec1911f35 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -185,14 +185,6 @@ int kvm_get_irq_route_gsi(void)
 #endif
 }
 
-#ifdef KVM_CAP_DEVICE_MSIX
-int kvm_assign_set_msix_entry(KVMState *s,
-                              struct kvm_assigned_msix_entry *entry)
-{
-    return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_ENTRY, entry);
-}
-#endif
-
 #if !defined(TARGET_I386)
 void kvm_arch_init_irq_routing(KVMState *s)
 {
diff --git a/qemu-kvm.h b/qemu-kvm.h
index 3fd6046f4..ad628d598 100644
--- a/qemu-kvm.h
+++ b/qemu-kvm.h
@@ -65,10 +65,6 @@ int kvm_del_routing_entry(struct kvm_irq_routing_entry *entry);
 int kvm_update_routing_entry(struct kvm_irq_routing_entry *entry,
                              struct kvm_irq_routing_entry *newentry);
 
-
-int kvm_assign_set_msix_entry(KVMState *s,
-                              struct kvm_assigned_msix_entry *entry);
-
 #endif /* CONFIG_KVM */
 
 #endif
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8c8eea1b3..a0adda03a 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -2173,6 +2173,18 @@ int kvm_device_msix_init_vectors(KVMState *s, uint32_t dev_id,
     return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, &msix_nr);
 }
 
+int kvm_device_msix_set_vector(KVMState *s, uint32_t dev_id, uint32_t vector,
+                               int virq)
+{
+    struct kvm_assigned_msix_entry msix_entry = {
+        .assigned_dev_id = dev_id,
+        .gsi = virq,
+        .entry = vector,
+    };
+
+    return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_ENTRY, &msix_entry);
+}
+
 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 aac14eba6..bd3b398b1 100644
--- a/target-i386/kvm_i386.h
+++ b/target-i386/kvm_i386.h
@@ -30,6 +30,8 @@ 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_set_vector(KVMState *s, uint32_t dev_id, uint32_t vector,
+                               int virq);
 int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id);
 
 #endif