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| author |   David Woodhouse <David.Woodhouse@intel.com> | 2015-03-24 14:54:56 +0000 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2015-10-15 11:24:51 +0100 |
| commit | 8a94ade4ce6df22006b96c5c9a8d6d12fce67585 (patch) | |
| tree | e67549edc8ec7f33b89eb1974d754e7f8bd2dd3c /include/linux/intel-iommu.h | |
| parent | iommu/vt-d: Introduce intel_iommu=pasid28, and pasid_enabled() macro (diff) | |
| download | linux-dev-8a94ade4ce6df22006b96c5c9a8d6d12fce67585.tar.xz linux-dev-8a94ade4ce6df22006b96c5c9a8d6d12fce67585.zip | |
iommu/vt-d: Add initial support for PASID tables
Add CONFIG_INTEL_IOMMU_SVM, and allocate PASID tables on supported hardware.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/intel-iommu.h')
| -rw-r--r-- | include/linux/intel-iommu.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 1d69c1d3aa9a..0f38e60d40ad 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -325,6 +325,9 @@ enum { #define VTD_FLAG_TRANS_PRE_ENABLED (1 << 0) #define VTD_FLAG_IRQ_REMAP_PRE_ENABLED (1 << 1) +struct pasid_entry; +struct pasid_state_entry; + struct intel_iommu { void __iomem *reg; /* Pointer to hardware regs, virtual addr */ u64 reg_phys; /* physical address of hw register set */ @@ -348,6 +351,15 @@ struct intel_iommu { struct iommu_flush flush; #endif +#ifdef CONFIG_INTEL_IOMMU_SVM + /* These are large and need to be contiguous, so we allocate just + * one for now. We'll maybe want to rethink that if we truly give + * devices away to userspace processes (e.g. for DPDK) and don't + * want to trust that userspace will use *only* the PASID it was + * told to. But while it's all driver-arbitrated, we're fine. */ + struct pasid_entry *pasid_table; + struct pasid_state_entry *pasid_state_table; +#endif struct q_inval *qi; /* Queued invalidation info */ u32 *iommu_state; /* Store iommu states between suspend and resume.*/ @@ -387,6 +399,9 @@ extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu); extern int dmar_ir_support(void); +extern int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu); +extern int intel_svm_free_pasid_tables(struct intel_iommu *iommu); + extern const struct attribute_group *intel_iommu_groups[]; #endif |