diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2022-10-07 11:04:39 -0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2022-10-07 08:10:52 -0600 |
| commit | 4b22ef042d6f54a6e5899555f2db71749133eca8 (patch) | |
| tree | 10838fcdc932cb2db6cacbd5764b47f5e5f51278 /virt | |
| parent | c82e81ab2569559ad873b3061217c2f37560682b (diff) | |
| download | lwn-4b22ef042d6f54a6e5899555f2db71749133eca8.tar.gz lwn-4b22ef042d6f54a6e5899555f2db71749133eca8.zip | |
vfio: Add vfio_file_is_group()
This replaces uses of vfio_file_iommu_group() which were only detecting if
the file is a VFIO file with no interest in the actual group.
The only remaning user of vfio_file_iommu_group() is in KVM for the SPAPR
stuff. It passes the iommu_group into the arch code through kvm for some
reason.
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Tested-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/1-v2-15417f29324e+1c-vfio_group_disassociate_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/vfio.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c index ce1b01d02c51..54aec3b0559c 100644 --- a/virt/kvm/vfio.c +++ b/virt/kvm/vfio.c @@ -61,6 +61,23 @@ static bool kvm_vfio_file_enforced_coherent(struct file *file) return ret; } +static bool kvm_vfio_file_is_group(struct file *file) +{ + bool (*fn)(struct file *file); + bool ret; + + fn = symbol_get(vfio_file_is_group); + if (!fn) + return false; + + ret = fn(file); + + symbol_put(vfio_file_is_group); + + return ret; +} + +#ifdef CONFIG_SPAPR_TCE_IOMMU static struct iommu_group *kvm_vfio_file_iommu_group(struct file *file) { struct iommu_group *(*fn)(struct file *file); @@ -77,7 +94,6 @@ static struct iommu_group *kvm_vfio_file_iommu_group(struct file *file) return ret; } -#ifdef CONFIG_SPAPR_TCE_IOMMU static void kvm_spapr_tce_release_vfio_group(struct kvm *kvm, struct kvm_vfio_group *kvg) { @@ -136,7 +152,7 @@ static int kvm_vfio_group_add(struct kvm_device *dev, unsigned int fd) return -EBADF; /* Ensure the FD is a vfio group FD.*/ - if (!kvm_vfio_file_iommu_group(filp)) { + if (!kvm_vfio_file_is_group(filp)) { ret = -EINVAL; goto err_fput; } |