xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iommu/vt-d: Add page request draining support

Browse Source 
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>
This commit is contained in:
Lu Baolu
2020-05-16 14:20:58 +08:00
committed by Joerg Roedel
parent 37e91bd4b3
commit 66ac4db36f
2 changed files with 106 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/intel-iommu.h
View File

@@ -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 */