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| author | Joao Martins <joao.m.martins@oracle.com> | 2023-10-24 14:51:05 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-10-24 11:58:44 -0300 |
| commit | 266ce58989ba05e2a24460fdbf402d766c2e3870 (patch) | |
| tree | 306f83d46769f067ff1962e07ee46df8a2a55530 /drivers/iommu/iommufd | |
| parent | e04b23c8d4ed977dbab4a4159f9e4d9a878b5c65 (diff) | |
| download | linux-266ce58989ba05e2a24460fdbf402d766c2e3870.tar.gz linux-266ce58989ba05e2a24460fdbf402d766c2e3870.tar.bz2 linux-266ce58989ba05e2a24460fdbf402d766c2e3870.zip | |
iommufd/selftest: Test IOMMU_HWPT_ALLOC_DIRTY_TRACKING
In order to selftest the iommu domain dirty enforcing implement the
mock_domain necessary support and add a new dev_flags to test that the
hwpt_alloc/attach_device fails as expected.
Expand the existing mock_domain fixture with a enforce_dirty test that
exercises the hwpt_alloc and device attachment.
Link: https://lore.kernel.org/r/20231024135109.73787-15-joao.m.martins@oracle.com
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/iommufd')
| -rw-r--r-- | drivers/iommu/iommufd/selftest.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index bd3704b28bfb..78362f2334f5 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -119,6 +119,11 @@ static void mock_domain_blocking_free(struct iommu_domain *domain) static int mock_domain_nop_attach(struct iommu_domain *domain, struct device *dev) { + struct mock_dev *mdev = container_of(dev, struct mock_dev, dev); + + if (domain->dirty_ops && (mdev->flags & MOCK_FLAGS_DEVICE_NO_DIRTY)) + return -EINVAL; + return 0; } @@ -147,6 +152,25 @@ static void *mock_domain_hw_info(struct device *dev, u32 *length, u32 *type) return info; } +static int mock_domain_set_dirty_tracking(struct iommu_domain *domain, + bool enable) +{ + return 0; +} + +static int mock_domain_read_and_clear_dirty(struct iommu_domain *domain, + unsigned long iova, size_t size, + unsigned long flags, + struct iommu_dirty_bitmap *dirty) +{ + return 0; +} + +const struct iommu_dirty_ops dirty_ops = { + .set_dirty_tracking = mock_domain_set_dirty_tracking, + .read_and_clear_dirty = mock_domain_read_and_clear_dirty, +}; + static const struct iommu_ops mock_ops; static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type) @@ -174,12 +198,20 @@ static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type) static struct iommu_domain * mock_domain_alloc_user(struct device *dev, u32 flags) { + struct mock_dev *mdev = container_of(dev, struct mock_dev, dev); struct iommu_domain *domain; - if (flags & (~IOMMU_HWPT_ALLOC_NEST_PARENT)) + if (flags & + (~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING))) + return ERR_PTR(-EOPNOTSUPP); + + if ((flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING) && + (mdev->flags & MOCK_FLAGS_DEVICE_NO_DIRTY)) return ERR_PTR(-EOPNOTSUPP); domain = mock_domain_alloc(IOMMU_DOMAIN_UNMANAGED); + if (domain && !(mdev->flags & MOCK_FLAGS_DEVICE_NO_DIRTY)) + domain->dirty_ops = &dirty_ops; if (!domain) domain = ERR_PTR(-ENOMEM); return domain; @@ -387,6 +419,9 @@ static struct mock_dev *mock_dev_create(unsigned long dev_flags) struct mock_dev *mdev; int rc; + if (dev_flags & ~(MOCK_FLAGS_DEVICE_NO_DIRTY)) + return ERR_PTR(-EINVAL); + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); if (!mdev) return ERR_PTR(-ENOMEM); |