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-id = 703
-title = "Resizable BAR (ReBAR) support on VFIO"
-state = "opened"
-created_at = "2021-11-01T09:20:09.204Z"
-closed_at = "n/a"
-labels = ["VFIO", "kind::Feature Request"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/703"
-host-os = "n/a"
-host-arch = "n/a"
-qemu-version = "n/a"
-guest-os = "n/a"
-guest-arch = "n/a"
-description = "n/a"
-reproduce = "n/a"
-additional = """Currently `vfio_add_ext_cap()` doesn't pass ReBAR support option to VFIO.
-
-There was a report that removing the line you see below makes it boot, but the system is not stable.
-Needs investigation.
-
-[https://github.com/qemu/qemu/blob/2255564fd21059960966b47212def9069cb56077/hw/vfio/pci.c#L2089](https://github.com/qemu/qemu/blob/2255564fd21059960966b47212def9069cb56077/hw/vfio/pci.c#L2089)
-```        switch (cap_id) {
-        case 0: /* kernel masked capability */
-        case PCI_EXT_CAP_ID_SRIOV: /* Read-only VF BARs confuse OVMF */
-        case PCI_EXT_CAP_ID_ARI: /* XXX Needs next function virtualization */
-        case PCI_EXT_CAP_ID_REBAR: /* Can't expose read-only */
-            trace_vfio_add_ext_cap_dropped(vdev->vbasedev.name, cap_id, next);
-```
-
-[Discussion link](https://forum.level1techs.com/t/smart-access-memory-vs-qemu-kvm/169447)"""