diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/syborg_virtio.c | 12 | ||||
| -rw-r--r-- | hw/virtio-pci.c | 14 | ||||
| -rw-r--r-- | hw/virtio.c | 11 | ||||
| -rw-r--r-- | hw/virtio.h | 6 |
4 files changed, 37 insertions, 6 deletions
diff --git a/hw/syborg_virtio.c b/hw/syborg_virtio.c index 6cf5a15c2c..a84206a11c 100644 --- a/hw/syborg_virtio.c +++ b/hw/syborg_virtio.c @@ -87,7 +87,7 @@ static uint32_t syborg_virtio_readl(void *opaque, target_phys_addr_t offset) break; case SYBORG_VIRTIO_HOST_FEATURES: ret = vdev->get_features(vdev); - ret |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY); + ret |= vdev->binding->get_features(s); break; case SYBORG_VIRTIO_GUEST_FEATURES: ret = vdev->features; @@ -242,8 +242,16 @@ static void syborg_virtio_update_irq(void *opaque, uint16_t vector) qemu_set_irq(proxy->irq, level != 0); } +static unsigned syborg_virtio_get_features(void *opaque) +{ + unsigned ret = 0; + ret |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY); + return ret; +} + static VirtIOBindings syborg_virtio_bindings = { - .notify = syborg_virtio_update_irq + .notify = syborg_virtio_update_irq, + .get_features = syborg_virtio_get_features, }; static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev) diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index d222ce03fe..450013091c 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -236,9 +236,7 @@ static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) switch (addr) { case VIRTIO_PCI_HOST_FEATURES: ret = vdev->get_features(vdev); - ret |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY); - ret |= (1 << VIRTIO_RING_F_INDIRECT_DESC); - ret |= (1 << VIRTIO_F_BAD_FEATURE); + ret |= vdev->binding->get_features(proxy); break; case VIRTIO_PCI_GUEST_FEATURES: ret = vdev->features; @@ -382,12 +380,22 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, msix_write_config(pci_dev, address, val, len); } +static unsigned virtio_pci_get_features(void *opaque) +{ + unsigned ret = 0; + ret |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY); + ret |= (1 << VIRTIO_RING_F_INDIRECT_DESC); + ret |= (1 << VIRTIO_F_BAD_FEATURE); + return ret; +} + static const VirtIOBindings virtio_pci_bindings = { .notify = virtio_pci_notify, .save_config = virtio_pci_save_config, .load_config = virtio_pci_load_config, .save_queue = virtio_pci_save_queue, .load_queue = virtio_pci_load_queue, + .get_features = virtio_pci_get_features, }; static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev, diff --git a/hw/virtio.c b/hw/virtio.c index 1f92171f68..cecd0dc042 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -651,6 +651,9 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f) int virtio_load(VirtIODevice *vdev, QEMUFile *f) { int num, i, ret; + uint32_t features; + uint32_t supported_features = vdev->get_features(vdev) | + vdev->binding->get_features(vdev->binding_opaque); if (vdev->binding->load_config) { ret = vdev->binding->load_config(vdev->binding_opaque, f); @@ -661,7 +664,13 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f) qemu_get_8s(f, &vdev->status); qemu_get_8s(f, &vdev->isr); qemu_get_be16s(f, &vdev->queue_sel); - qemu_get_be32s(f, &vdev->features); + qemu_get_be32s(f, &features); + if (features & ~supported_features) { + fprintf(stderr, "Features 0x%x unsupported. Allowed features: 0x%x\n", + features, supported_features); + return -1; + } + vdev->features = features; vdev->config_len = qemu_get_be32(f); qemu_get_buffer(f, vdev->config, vdev->config_len); diff --git a/hw/virtio.h b/hw/virtio.h index 15ad910768..35532a6f25 100644 --- a/hw/virtio.h +++ b/hw/virtio.h @@ -31,6 +31,11 @@ /* We've given up on this device. */ #define VIRTIO_CONFIG_S_FAILED 0x80 +/* Some virtio feature bits (currently bits 28 through 31) are reserved for the + * transport being used (eg. virtio_ring), the rest are per-device feature bits. */ +#define VIRTIO_TRANSPORT_F_START 28 +#define VIRTIO_TRANSPORT_F_END 32 + /* We notify when the ring is completely used, even if the guest is suppressing * callbacks */ #define VIRTIO_F_NOTIFY_ON_EMPTY 24 @@ -82,6 +87,7 @@ typedef struct { void (*save_queue)(void * opaque, int n, QEMUFile *f); int (*load_config)(void * opaque, QEMUFile *f); int (*load_queue)(void * opaque, int n, QEMUFile *f); + unsigned (*get_features)(void * opaque); } VirtIOBindings; #define VIRTIO_PCI_QUEUE_MAX 16 |