msi: implements msi

implements msi related functions.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/hw/pci.h b/hw/pci.h
index 3072a5f854..9e2f27d372 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -109,11 +109,12 @@ typedef struct PCIIORegion {
 
 /* Bits in cap_present field. */
 enum {
-    QEMU_PCI_CAP_MSIX = 0x1,
-    QEMU_PCI_CAP_EXPRESS = 0x2,
+    QEMU_PCI_CAP_MSI = 0x1,
+    QEMU_PCI_CAP_MSIX = 0x2,
+    QEMU_PCI_CAP_EXPRESS = 0x4,
 
     /* multifunction capable device */
-#define QEMU_PCI_CAP_MULTIFUNCTION_BITNR        2
+#define QEMU_PCI_CAP_MULTIFUNCTION_BITNR        3
     QEMU_PCI_CAP_MULTIFUNCTION = (1 << QEMU_PCI_CAP_MULTIFUNCTION_BITNR),
 };
 
@@ -171,6 +172,9 @@ struct PCIDevice {
     /* Version id needed for VMState */
     int32_t version_id;
 
+    /* Offset of MSI capability in config space */
+    uint8_t msi_cap;
+
     /* Location of option rom */
     char *romfile;
     ram_addr_t rom_offset;