diff options
| -rw-r--r-- | hw/virtio/virtio-pci.c | 76 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.h | 3 |
2 files changed, 78 insertions, 1 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 6a0174e9cc..7890b00fd7 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -448,6 +448,7 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + struct virtio_pci_cfg_cap *cfg; pci_default_write_config(pci_dev, address, val, len); @@ -456,6 +457,51 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, virtio_pci_stop_ioeventfd(proxy); virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); } + + if (proxy->config_cap && + ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, + pci_cfg_data), + sizeof cfg->pci_cfg_data)) { + uint32_t off; + uint32_t len; + + cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); + off = le32_to_cpu(cfg->cap.offset); + len = le32_to_cpu(cfg->cap.length); + + if ((len == 1 || len == 2 || len == 4)) { + address_space_write(&proxy->modern_as, off, + MEMTXATTRS_UNSPECIFIED, + cfg->pci_cfg_data, len); + } + } +} + +static uint32_t virtio_read_config(PCIDevice *pci_dev, + uint32_t address, int len) +{ + VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); + struct virtio_pci_cfg_cap *cfg; + + if (proxy->config_cap && + ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, + pci_cfg_data), + sizeof cfg->pci_cfg_data)) { + uint32_t off; + uint32_t len; + + cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); + off = le32_to_cpu(cfg->cap.offset); + len = le32_to_cpu(cfg->cap.length); + + if ((len == 1 || len == 2 || len == 4)) { + address_space_read(&proxy->modern_as, off, + MEMTXATTRS_UNSPECIFIED, + cfg->pci_cfg_data, len); + } + } + + return pci_default_read_config(pci_dev, address, len); } static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, @@ -942,7 +988,7 @@ static int virtio_pci_query_nvectors(DeviceState *d) return proxy->nvectors; } -static void virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, +static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, struct virtio_pci_cap *cap) { PCIDevice *dev = &proxy->pci_dev; @@ -954,6 +1000,8 @@ static void virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, assert(cap->cap_len >= sizeof *cap); memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len, cap->cap_len - PCI_CAP_FLAGS); + + return offset; } static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, @@ -1329,6 +1377,11 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) .notify_off_multiplier = cpu_to_le32(QEMU_VIRTIO_PCI_QUEUE_MEM_MULT), }; + struct virtio_pci_cfg_cap cfg = { + .cap.cap_len = sizeof cfg, + .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG, + }; + struct virtio_pci_cfg_cap *cfg_mask; /* TODO: add io access for speed */ @@ -1338,11 +1391,19 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) virtio_pci_modern_region_map(proxy, &proxy->isr, &cap); virtio_pci_modern_region_map(proxy, &proxy->device, &cap); virtio_pci_modern_region_map(proxy, &proxy->notify, ¬ify.cap); + pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar, PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_PREFETCH | PCI_BASE_ADDRESS_MEM_TYPE_64, &proxy->modern_bar); + + proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap); + cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap); + pci_set_byte(&cfg_mask->cap.bar, ~0x0); + pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0); + pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0); + pci_set_long(cfg_mask->pci_cfg_data, ~0x0); } if (proxy->nvectors && @@ -1354,6 +1415,7 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) } proxy->pci_dev.config_write = virtio_write_config; + proxy->pci_dev.config_read = virtio_read_config; if (legacy) { size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) @@ -1424,6 +1486,15 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp) 2 * QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * VIRTIO_QUEUE_MAX); + memory_region_init_alias(&proxy->modern_cfg, + OBJECT(proxy), + "virtio-pci-cfg", + &proxy->modern_bar, + 0, + memory_region_size(&proxy->modern_bar)); + + address_space_init(&proxy->modern_as, &proxy->modern_cfg, "virtio-pci-cfg-as"); + virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy); if (k->realize) { k->realize(proxy, errp); @@ -1432,7 +1503,10 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp) static void virtio_pci_exit(PCIDevice *pci_dev) { + VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); + msix_uninit_exclusive_bar(pci_dev); + address_space_destroy(&proxy->modern_as); } static void virtio_pci_reset(DeviceState *qdev) diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 05d9d243f6..b6c442f522 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -112,9 +112,12 @@ struct VirtIOPCIProxy { VirtIOPCIRegion device; VirtIOPCIRegion notify; MemoryRegion modern_bar; + MemoryRegion modern_cfg; + AddressSpace modern_as; uint32_t legacy_io_bar; uint32_t msix_bar; uint32_t modern_mem_bar; + int config_cap; uint32_t flags; uint32_t class_code; uint32_t nvectors; |