From 34aeeecdb3357f9ca5aea549525a17790d1c427d Mon Sep 17 00:00:00 2001 From: Yi Liu Date: Tue, 18 Jul 2023 06:55:28 -0700 Subject: vfio: Accept vfio device file in the KVM facing kAPI This makes the vfio file kAPIs to accept vfio device files, also a preparation for vfio device cdev support. For the kvm set with vfio device file, kvm pointer is stored in struct vfio_device_file, and use kvm_ref_lock to protect kvm set and kvm pointer usage within VFIO. This kvm pointer will be set to vfio_device after device file is bound to iommufd in the cdev path. Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Tested-by: Terrence Xu Tested-by: Nicolin Chen Tested-by: Matthew Rosato Tested-by: Yanting Jiang Tested-by: Shameer Kolothum Tested-by: Zhenzhong Duan Signed-off-by: Yi Liu Link: https://lore.kernel.org/r/20230718135551.6592-4-yi.l.liu@intel.com Signed-off-by: Alex Williamson --- drivers/vfio/vfio.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/vfio/vfio.h') diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index b1e327a85a32..332528af0846 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -18,6 +18,9 @@ struct vfio_container; struct vfio_device_file { struct vfio_device *device; + + spinlock_t kvm_ref_lock; /* protect kvm field */ + struct kvm *kvm; }; void vfio_device_put_registration(struct vfio_device *device); -- cgit v1.2.3