The branch stable/13 has been updated by khng: URL: https://cgit.FreeBSD.org/src/commit/?id=2e107638eac2a721bc024314ae79d4688edfc130
commit 2e107638eac2a721bc024314ae79d4688edfc130 Author: Ka Ho Ng <[email protected]> AuthorDate: 2021-03-20 07:40:55 +0000 Commit: Ka Ho Ng <[email protected]> CommitDate: 2021-04-03 06:09:50 +0000 virtio_pci_legacy: Allow memory space for configuration For guests running under some kind of VMMs, configuration structure is available in memory space but not I/O space. Reported by: Yuan Rui <[email protected]> Reviewed by: rpokala, bryanv, jhb Approved by: philip (mentor) Differential Revision: https://reviews.freebsd.org/D28818 (cherry picked from commit cf5d1112408ddef3fdff8212599727c49ba90fa4) --- sys/dev/virtio/pci/virtio_pci_legacy.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/sys/dev/virtio/pci/virtio_pci_legacy.c b/sys/dev/virtio/pci/virtio_pci_legacy.c index d74983099110..a17dd22aa953 100644 --- a/sys/dev/virtio/pci/virtio_pci_legacy.c +++ b/sys/dev/virtio/pci/virtio_pci_legacy.c @@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$"); struct vtpci_legacy_softc { device_t vtpci_dev; struct vtpci_common vtpci_common; + int vtpci_res_type; struct resource *vtpci_res; struct resource *vtpci_msix_table_res; struct resource *vtpci_msix_pba_res; @@ -231,7 +232,7 @@ vtpci_legacy_attach(device_t dev) error = vtpci_legacy_alloc_resources(sc); if (error) { - device_printf(dev, "cannot map I/O space\n"); + device_printf(dev, "cannot map I/O space nor memory space\n"); return (error); } @@ -601,14 +602,25 @@ vtpci_legacy_teardown_msix(struct vtpci_legacy_softc *sc) static int vtpci_legacy_alloc_resources(struct vtpci_legacy_softc *sc) { + const int res_types[] = { SYS_RES_IOPORT, SYS_RES_MEMORY }; device_t dev; - int rid; + int rid, i; dev = sc->vtpci_dev; - rid = PCIR_BAR(0); - if ((sc->vtpci_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, - &rid, RF_ACTIVE)) == NULL) + /* + * Most hypervisors export the common configuration structure in IO + * space, but some use memory space; try both. + */ + for (i = 0; nitems(res_types); i++) { + rid = PCIR_BAR(0); + sc->vtpci_res_type = res_types[i]; + sc->vtpci_res = bus_alloc_resource_any(dev, res_types[i], &rid, + RF_ACTIVE); + if (sc->vtpci_res != NULL) + break; + } + if (sc->vtpci_res == NULL) return (ENXIO); return (0); @@ -622,7 +634,7 @@ vtpci_legacy_free_resources(struct vtpci_legacy_softc *sc) dev = sc->vtpci_dev; if (sc->vtpci_res != NULL) { - bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(0), + bus_release_resource(dev, sc->vtpci_res_type, PCIR_BAR(0), sc->vtpci_res); sc->vtpci_res = NULL; } _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all To unsubscribe, send any mail to "[email protected]"
