Introduce helper vfio_pci_from_vfio_device() to transform from VFIODevice to VFIOPCIDevice, also to hide low level VFIO_DEVICE_TYPE_PCI type check.
Suggested-by: Cédric Le Goater <c...@redhat.com> Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com> Reviewed-by: Cédric Le Goater <c...@redhat.com> Link: https://lore.kernel.org/qemu-devel/20250801023533.1458644-1-zhenzhong.d...@intel.com [ clg: Added documentation ] Signed-off-by: Cédric Le Goater <c...@redhat.com> --- hw/vfio/pci.h | 12 ++++++++++++ hw/vfio/container.c | 4 ++-- hw/vfio/device.c | 2 +- hw/vfio/iommufd.c | 4 ++-- hw/vfio/listener.c | 4 ++-- hw/vfio/pci.c | 9 +++++++++ 6 files changed, 28 insertions(+), 7 deletions(-) diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 810a842f4a..beb8fb9ee7 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -221,6 +221,18 @@ void vfio_pci_write_config(PCIDevice *pdev, uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size); void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size); +/** + * vfio_pci_from_vfio_device: Transform from VFIODevice to + * VFIOPCIDevice + * + * This function checks if the given @vbasedev is a VFIO PCI device. + * If it is, it returns the containing VFIOPCIDevice. + * + * @vbasedev: The VFIODevice to transform + * + * Return: The VFIOPCIDevice on success, NULL on failure. + */ +VFIOPCIDevice *vfio_pci_from_vfio_device(VFIODevice *vbasedev); void vfio_sub_page_bar_update_mappings(VFIOPCIDevice *vdev); bool vfio_opt_rom_in_denylist(VFIOPCIDevice *vdev); bool vfio_config_quirk_setup(VFIOPCIDevice *vdev, Error **errp); diff --git a/hw/vfio/container.c b/hw/vfio/container.c index 3e13feaa74..134ddccc52 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -1087,7 +1087,7 @@ static int vfio_legacy_pci_hot_reset(VFIODevice *vbasedev, bool single) /* Prep dependent devices for reset and clear our marker. */ QLIST_FOREACH(vbasedev_iter, &group->device_list, next) { if (!vbasedev_iter->dev->realized || - vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) { + !vfio_pci_from_vfio_device(vbasedev_iter)) { continue; } tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev); @@ -1172,7 +1172,7 @@ out: QLIST_FOREACH(vbasedev_iter, &group->device_list, next) { if (!vbasedev_iter->dev->realized || - vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) { + !vfio_pci_from_vfio_device(vbasedev_iter)) { continue; } tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev); diff --git a/hw/vfio/device.c b/hw/vfio/device.c index 52a1996dc4..08f12ac31f 100644 --- a/hw/vfio/device.c +++ b/hw/vfio/device.c @@ -129,7 +129,7 @@ static inline const char *action_to_str(int action) static const char *index_to_str(VFIODevice *vbasedev, int index) { - if (vbasedev->type != VFIO_DEVICE_TYPE_PCI) { + if (!vfio_pci_from_vfio_device(vbasedev)) { return NULL; } diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index 48c590b6a9..8c27222f75 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -737,8 +737,8 @@ iommufd_cdev_dep_get_realized_vpdev(struct vfio_pci_dependent_device *dep_dev, } vbasedev_tmp = iommufd_cdev_pci_find_by_devid(dep_dev->devid); - if (!vbasedev_tmp || !vbasedev_tmp->dev->realized || - vbasedev_tmp->type != VFIO_DEVICE_TYPE_PCI) { + if (!vfio_pci_from_vfio_device(vbasedev_tmp) || + !vbasedev_tmp->dev->realized) { return NULL; } diff --git a/hw/vfio/listener.c b/hw/vfio/listener.c index f498e23a93..903dfd8bf2 100644 --- a/hw/vfio/listener.c +++ b/hw/vfio/listener.c @@ -450,7 +450,7 @@ static void vfio_device_error_append(VFIODevice *vbasedev, Error **errp) * MMIO region mapping failures are not fatal but in this case PCI * peer-to-peer transactions are broken. */ - if (vbasedev && vbasedev->type == VFIO_DEVICE_TYPE_PCI) { + if (vfio_pci_from_vfio_device(vbasedev)) { error_append_hint(errp, "%s: PCI peer-to-peer transactions " "on BARs are not supported.\n", vbasedev->name); } @@ -751,7 +751,7 @@ static bool vfio_section_is_vfio_pci(MemoryRegionSection *section, owner = memory_region_owner(section->mr); QLIST_FOREACH(vbasedev, &bcontainer->device_list, container_next) { - if (vbasedev->type != VFIO_DEVICE_TYPE_PCI) { + if (!vfio_pci_from_vfio_device(vbasedev)) { continue; } pcidev = container_of(vbasedev, VFIOPCIDevice, vbasedev); diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 07257d0fa0..3fe5b03eb1 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2833,6 +2833,15 @@ static int vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f) return ret; } +/* Transform from VFIODevice to VFIOPCIDevice. Return NULL if fails. */ +VFIOPCIDevice *vfio_pci_from_vfio_device(VFIODevice *vbasedev) +{ + if (vbasedev && vbasedev->type == VFIO_DEVICE_TYPE_PCI) { + return container_of(vbasedev, VFIOPCIDevice, vbasedev); + } + return NULL; +} + void vfio_sub_page_bar_update_mappings(VFIOPCIDevice *vdev) { PCIDevice *pdev = &vdev->pdev; -- 2.47.1
