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author | Vasant Hegde <vasant.hegde@amd.com> | 2024-04-18 13:33:58 +0300 |
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committer | Joerg Roedel <jroedel@suse.de> | 2024-04-26 13:16:05 +0300 |
commit | 1af95763e0a33e854b4c0a961756719eb8a2b74d (patch) | |
tree | dc4182cfbc6629775232d06e7450cf0f3bec5d88 /drivers/iommu/amd/amd_iommu.h | |
parent | c4cb23111103a841c2df30058597398443bcad5f (diff) | |
download | linux-1af95763e0a33e854b4c0a961756719eb8a2b74d.tar.xz |
iommu/amd: Initial SVA support for AMD IOMMU
This includes :
- Add data structure to track per protection domain dev/pasid binding details
protection_domain->dev_data_list will track attached list of
dev_data/PASIDs.
- Move 'to_pdomain()' to header file
- Add iommu_sva_set_dev_pasid(). It will check whether PASID is supported
or not. Also adds PASID to SVA protection domain list as well as to
device GCR3 table.
- Add iommu_ops.remove_dev_pasid support. It will unbind PASID from
device. Also remove pasid data from protection domain device list.
- Add IOMMU_SVA as dependency to AMD_IOMMU driver
For a given PASID, iommu_set_dev_pasid() will bind all devices to same
SVA protection domain (1 PASID : 1 SVA protection domain : N devices).
This protection domain is different from device protection domain (one
that's mapped in attach_device() path). IOMMU uses domain ID for caching,
invalidation, etc. In SVA mode it will use per-device-domain-ID. Hence in
invalidation path we retrieve domain ID from gcr3_info_table structure and
use that for invalidation.
Co-developed-by: Wei Huang <wei.huang2@amd.com>
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/20240418103400.6229-14-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd/amd_iommu.h')
-rw-r--r-- | drivers/iommu/amd/amd_iommu.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h index dabbb85a71e9..49462d073132 100644 --- a/drivers/iommu/amd/amd_iommu.h +++ b/drivers/iommu/amd/amd_iommu.h @@ -44,6 +44,12 @@ extern int amd_iommu_guest_ir; extern enum io_pgtable_fmt amd_iommu_pgtable; extern int amd_iommu_gpt_level; +/* Protection domain ops */ +int iommu_sva_set_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid); +void amd_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid); + +/* SVA/PASID */ bool amd_iommu_pasid_supported(void); /* IOPF */ @@ -174,6 +180,11 @@ static inline struct amd_iommu *get_amd_iommu_from_dev_data(struct iommu_dev_dat return iommu_get_iommu_dev(dev_data->dev, struct amd_iommu, iommu); } +static inline struct protection_domain *to_pdomain(struct iommu_domain *dom) +{ + return container_of(dom, struct protection_domain, domain); +} + bool translation_pre_enabled(struct amd_iommu *iommu); bool amd_iommu_is_attach_deferred(struct device *dev); int __init add_special_device(u8 type, u8 id, u32 *devid, bool cmd_line); |