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vfio/iommufd: Add properties and handlers to TYPE_HOST_IOMMU_DEVICE_IOMMUFD

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Enhance HostIOMMUDeviceIOMMUFD object with 3 new members, specific
to the iommufd BE + 2 new class functions.

IOMMUFD BE includes IOMMUFD handle, devid and hwpt_id. IOMMUFD handle
and devid are used to allocate/free ioas and hwpt. hwpt_id is used to
re-attach IOMMUFD backed device to its default VFIO sub-system created
hwpt, i.e., when vIOMMU is disabled by guest. These properties are
initialized in hiod::realize() after attachment.

2 new class functions are [at|de]tach_hwpt(). They are used to
attach/detach hwpt. VFIO and VDPA can have different implementions,
so implementation will be in sub-class instead of HostIOMMUDeviceIOMMUFD,
e.g., in HostIOMMUDeviceIOMMUFDVFIO.

Add two wrappers host_iommu_device_iommufd_[at|de]tach_hwpt to wrap the
two functions.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250604062115.4004200-3-zhenzhong.duan@intel.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Zhenzhong Duan 2025-06-04 14:21:13 +08:00 • committed by Cédric Le Goater
parent 5c47679cb6
commit 98962d6298
3 changed files with 78 additions and 0 deletions
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22
backends/iommufd.c
View file

@ -347,6 +347,26 @@ bool iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t id,
return !ret;
}
bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
uint32_t hwpt_id, Error **errp)
{
HostIOMMUDeviceIOMMUFDClass *idevc =
HOST_IOMMU_DEVICE_IOMMUFD_GET_CLASS(idev);
g_assert(idevc->attach_hwpt);
return idevc->attach_hwpt(idev, hwpt_id, errp);
}
bool host_iommu_device_iommufd_detach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
Error **errp)
{
HostIOMMUDeviceIOMMUFDClass *idevc =
HOST_IOMMU_DEVICE_IOMMUFD_GET_CLASS(idev);
g_assert(idevc->detach_hwpt);
return idevc->detach_hwpt(idev, errp);
}
static int hiod_iommufd_get_cap(HostIOMMUDevice *hiod, int cap, Error **errp)
{
HostIOMMUDeviceCaps *caps = &hiod->caps;
@ -385,6 +405,8 @@ static const TypeInfo types[] = {
}, {
.name = TYPE_HOST_IOMMU_DEVICE_IOMMUFD,
.parent = TYPE_HOST_IOMMU_DEVICE,
.instance_size = sizeof(HostIOMMUDeviceIOMMUFD),
.class_size = sizeof(HostIOMMUDeviceIOMMUFDClass),
.class_init = hiod_iommufd_class_init,
.abstract = true,
}