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iommu/amd: Add support for enabling/disabling IOMMU features

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Add support for struct iommu_ops.dev_{enable/disable}_feat. Please note
that the empty feature switches will be populated by subsequent patches.

Signed-off-by: Wei Huang <wei.huang2@amd.com>
Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240418103400.6229-4-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Wei Huang
2024-04-18 10:33:48 +00:00
committed by Joerg Roedel
parent c5ebd09625
commit db44bd517f
1 changed files with 28 additions and 0 deletions
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drivers/iommu/amd/iommu.c
+28
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@@ -2791,6 +2791,32 @@ static const struct iommu_dirty_ops amd_dirty_ops = {
.read_and_clear_dirty = amd_iommu_read_and_clear_dirty,
};
static int amd_iommu_dev_enable_feature(struct device *dev,
enum iommu_dev_features feat)
{
int ret;
switch (feat) {
default:
ret = -EINVAL;
break;
}
return ret;
}
static int amd_iommu_dev_disable_feature(struct device *dev,
enum iommu_dev_features feat)
{
int ret;
switch (feat) {
default:
ret = -EINVAL;
break;
}
return ret;
}
const struct iommu_ops amd_iommu_ops = {
.capable = amd_iommu_capable,
.domain_alloc = amd_iommu_domain_alloc,
@@ -2803,6 +2829,8 @@ const struct iommu_ops amd_iommu_ops = {
.is_attach_deferred = amd_iommu_is_attach_deferred,
.pgsize_bitmap = AMD_IOMMU_PGSIZES,
.def_domain_type = amd_iommu_def_domain_type,
.dev_enable_feat = amd_iommu_dev_enable_feature,
.dev_disable_feat = amd_iommu_dev_disable_feature,
.default_domain_ops = &(const struct iommu_domain_ops) {
.attach_dev = amd_iommu_attach_device,
.map_pages = amd_iommu_map_pages,