diff options
Diffstat (limited to 'mdk-stage1/probing.c')
| -rw-r--r-- | mdk-stage1/probing.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/mdk-stage1/probing.c b/mdk-stage1/probing.c index 9dba6e6e8..334d0f7b7 100644 --- a/mdk-stage1/probing.c +++ b/mdk-stage1/probing.c @@ -315,6 +315,58 @@ void probe_pci_modules(enum driver_type type, char **pci_modules, unsigned int pciusb_free(&entries); } +/** Loads modules for known virtio devices + * + * virtio modules are not being loaded using the PCI probing mechanism + * because pcitable.gz does not have IDs for these devices. + * + * The possible correct solution for it is to fix the script which + * generates pcitable.gz to handle the virtio_device_id structure. + */ +void probe_virtio_modules(void) +{ + struct pciusb_entries entries; + int i; + char *name; + char *options; + int loaded_pci = 0; + + entries = pci_probe(); + for (i = 0; i < entries.nb; i++) { + struct pciusb_entry *e = &entries.entries[i]; + if (e->vendor == VIRTIO_PCI_VENDOR) { + if (!loaded_pci) { + log_message("loading virtio-pci"); + my_insmod("virtio_pci", ANY_DRIVER_TYPE, NULL, 0); + loaded_pci = 1; + } + + name = NULL; + options = NULL; + + switch (e->subdevice) { + case VIRTIO_ID_NET: + name = "virtio_net"; + options = "csum=0"; + break; + case VIRTIO_ID_BLOCK: + name = "virtio_blk"; + break; + case VIRTIO_ID_BALLOON: + name = "virtio_balloon"; + break; + default: + log_message("warning: unknown virtio device %04x", e->device); + } + if (name) { + log_message("virtio: loading %s", name); + my_insmod(name, ANY_DRIVER_TYPE, options, 0); + } + } + } + pciusb_free(&entries); +} + #ifdef ENABLE_USB void probe_that_type(enum driver_type type, enum media_bus bus) #else @@ -323,6 +375,7 @@ void probe_that_type(enum driver_type type, enum media_bus bus __attribute__ ((u { static int already_probed_usb_controllers = 0; static int already_loaded_usb_scsi = 0; + static int already_probed_virtio_devices = 0; /* ---- PCI probe ---------------------------------------------- */ if (bus != BUS_USB) { @@ -352,6 +405,12 @@ void probe_that_type(enum driver_type type, enum media_bus bus __attribute__ ((u probe_pci_modules(type, usb_controller_modules, usb_controller_modules_len); break; #endif + case VIRTIO_DEVICES: + if (already_probed_virtio_devices) + break; + probe_virtio_modules(); + already_probed_virtio_devices = 1; + break; default: break; } |