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iommu/vt-d: Support page request in scalable mode

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VT-d Rev3.0 has made a few changes to the page request interface,

1. widened PRQ descriptor from 128 bits to 256 bits;
2. removed streaming response type;
3. introduced private data that requires page response even the
   request is not last request in group (LPIG).

This is a supplement to commit 1c4f88b7f1 ("iommu/vt-d: Shared
virtual address in scalable mode") and makes the svm code compliant
with VT-d Rev3.0.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Fixes: 1c4f88b7f1 ("iommu/vt-d: Shared virtual address in scalable mode")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jacob Pan 2019-01-11 13:04:57 +08:00 • committed by Joerg Roedel
parent bfeffd1552
commit 5b438f4ba3
3 changed files with 55 additions and 45 deletions
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2
include/linux/intel-svm.h
View file

@ -20,7 +20,7 @@ struct device;
struct svm_dev_ops {
void (*fault_cb)(struct device *dev, int pasid, u64 address,
u32 private, int rwxp, int response);
void *private, int rwxp, int response);
};
/* Values for rxwp in fault_cb callback */