pci: add API to add capability at a known offset

Unlike virtio, device emulations need to add pci capabilities
at known offsets to match real hardware. Make this possible
by adding an appropriate API.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/hw/pci.h b/hw/pci.h
index 20c670edbb..625188c0e6 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -190,6 +190,8 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
                             PCIMapIORegionFunc *map_func);
 
 int pci_add_capability(PCIDevice *pci_dev, uint8_t cap_id, uint8_t cap_size);
+int pci_add_capability_at_offset(PCIDevice *pci_dev, uint8_t cap_id,
+                                 uint8_t cap_offset, uint8_t cap_size);
 
 void pci_del_capability(PCIDevice *pci_dev, uint8_t cap_id, uint8_t cap_size);