kvm tools: Simplify msi message handling

This patch simplifies passing around msi messages by using
'struct kvm_irq_routing_msi' for storing of msi messages instead
of passing all msi parameters around.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

hw/pci-shmem.c

@@ -124,10 +124,7 @@ int pci_shmem__get_local_irqfd(struct kvm *kvm)
 			return fd;
 
 		if (pci_shmem_pci_device.msix.ctrl & PCI_MSIX_FLAGS_ENABLE) {
-			gsi = irq__add_msix_route(kvm,
-				  msix_table[0].low,
-				  msix_table[0].high,
-				  msix_table[0].data);
+			gsi = irq__add_msix_route(kvm, &msix_table[0].msg);
 		} else {
 			gsi = pci_shmem_pci_device.irq_line;
 		}

include/kvm/irq.h

@@ -4,6 +4,8 @@
 #include <linux/types.h>
 #include <linux/rbtree.h>
 #include <linux/list.h>
+#include <linux/kvm.h>
+#include <linux/msi.h>
 
 struct kvm;
 
@@ -24,6 +26,6 @@ int irq__register_device(u32 dev, u8 *num, u8 *pin, u8 *line);
 struct rb_node *irq__get_pci_tree(void);
 
 void irq__init(struct kvm *kvm);
-int irq__add_msix_route(struct kvm *kvm, u32 low, u32 high, u32 data);
+int irq__add_msix_route(struct kvm *kvm, struct msi_msg *msg);
 
 #endif

include/kvm/pci.h

@@ -2,8 +2,9 @@
 #define KVM__PCI_H
 
 #include <linux/types.h>
-
+#include <linux/kvm.h>
 #include <linux/pci_regs.h>
+#include <linux/msi.h>
 
 /*
  * PCI Configuration Mechanism #1 I/O ports. See Section 3.7.4.1.
@@ -26,9 +27,7 @@ struct pci_config_address {
 };
 
 struct msix_table {
-	u32 low;
-	u32 high;
-	u32 data;
+	struct msi_msg msg;
 	u32 ctrl;
 };
 

irq.c

@@ -167,7 +167,7 @@ void irq__init(struct kvm *kvm)
 		die("Failed setting GSI routes");
 }
 
-int irq__add_msix_route(struct kvm *kvm, u32 low, u32 high, u32 data)
+int irq__add_msix_route(struct kvm *kvm, struct msi_msg *msg)
 {
 	int r;
 
@@ -175,9 +175,9 @@ int irq__add_msix_route(struct kvm *kvm, u32 low, u32 high, u32 data)
 		(struct kvm_irq_routing_entry) {
 			.gsi = gsi,
 			.type = KVM_IRQ_ROUTING_MSI,
-			.u.msi.address_lo = low,
-			.u.msi.address_hi = high,
-			.u.msi.data = data,
+			.u.msi.address_hi = msg->address_hi,
+			.u.msi.address_lo = msg->address_lo,
+			.u.msi.data = msg->data,
 		};
 
 	r = ioctl(kvm->vm_fd, KVM_SET_GSI_ROUTING, irq_routing);

virtio/pci.c

@@ -126,20 +126,14 @@ static bool virtio_pci__specific_io_out(struct kvm *kvm, struct virtio_pci *vpci
 		case VIRTIO_MSI_CONFIG_VECTOR:
 			vec = vpci->config_vector = ioport__read16(data);
 
-			gsi = irq__add_msix_route(kvm,
-						  vpci->msix_table[vec].low,
-						  vpci->msix_table[vec].high,
-						  vpci->msix_table[vec].data);
+			gsi = irq__add_msix_route(kvm, &vpci->msix_table[vec].msg);
 
 			vpci->config_gsi = gsi;
 			break;
 		case VIRTIO_MSI_QUEUE_VECTOR: {
 			vec = vpci->vq_vector[vpci->queue_selector] = ioport__read16(data);
 
-			gsi = irq__add_msix_route(kvm,
-						  vpci->msix_table[vec].low,
-						  vpci->msix_table[vec].high,
-						  vpci->msix_table[vec].data);
+			gsi = irq__add_msix_route(kvm, &vpci->msix_table[vec].msg);
 			vpci->gsis[vpci->queue_selector] = gsi;
 			break;
 		}