diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2020-05-16 14:20:58 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-18 15:37:26 +0200 |
| commit | 66ac4db36f4c12a3b02db864ccb0801cd938b6de (patch) | |
| tree | 136555ffb2b1a1461f34e3d5f95f76eb3fce2140 /include/linux/intel-iommu.h | |
| parent | 37e91bd4b39922b31ca4e6c4eabb0d7140b14e74 (diff) | |
| download | lwn-66ac4db36f4c12a3b02db864ccb0801cd938b6de.tar.gz lwn-66ac4db36f4c12a3b02db864ccb0801cd938b6de.zip | |
iommu/vt-d: Add page request draining support
When a PASID is stopped or terminated, there can be pending PRQs
(requests that haven't received responses) in remapping hardware.
This adds the interface to drain page requests and call it when a
PASID is terminated.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200516062101.29541-16-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/intel-iommu.h')
| -rw-r--r-- | include/linux/intel-iommu.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 677dee59e3c0..21633cee6331 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -292,6 +292,8 @@ /* PRS_REG */ #define DMA_PRS_PPR ((u32)1) +#define DMA_PRS_PRO ((u32)2) + #define DMA_VCS_PAS ((u64)1) #define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \ @@ -333,6 +335,7 @@ enum { #define QI_IWD_STATUS_DATA(d) (((u64)d) << 32) #define QI_IWD_STATUS_WRITE (((u64)1) << 5) +#define QI_IWD_FENCE (((u64)1) << 6) #define QI_IWD_PRQ_DRAIN (((u64)1) << 7) #define QI_IOTLB_DID(did) (((u64)did) << 16) @@ -582,6 +585,7 @@ struct intel_iommu { #ifdef CONFIG_INTEL_IOMMU_SVM struct page_req_dsc *prq; unsigned char prq_name[16]; /* Name for PRQ interrupt */ + struct completion prq_complete; struct ioasid_allocator_ops pasid_allocator; /* Custom allocator for PASIDs */ #endif struct q_inval *qi; /* Queued invalidation info */ |