diff options
| author | David Woodhouse <David.Woodhouse@intel.com> | 2015-10-13 17:18:10 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2015-10-15 15:35:28 +0100 |
| commit | 0204a49609824163092c32a8aeb073f7e9acc76d (patch) | |
| tree | acf951173aa656c2781694deb985e3a7f14b21ce /include/linux/intel-svm.h | |
| parent | a222a7f0bb6c94c31cc9c755110593656f19de89 (diff) | |
iommu/vt-d: Add callback to device driver on page faults
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/intel-svm.h')
| -rw-r--r-- | include/linux/intel-svm.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h index 42f80ad7a7a0..239f8a13a332 100644 --- a/include/linux/intel-svm.h +++ b/include/linux/intel-svm.h @@ -20,10 +20,23 @@ struct device; +struct svm_dev_ops { + void (*fault_cb)(struct device *dev, int pasid, u64 address, + u32 private, int rwxp, int response); +}; + +/* Values for rxwp in fault_cb callback */ +#define SVM_REQ_READ (1<<3) +#define SVM_REQ_WRITE (1<<2) +#define SVM_REQ_EXEC (1<<1) +#define SVM_REQ_PRIV (1<<0) + /** * intel_svm_bind_mm() - Bind the current process to a PASID * @dev: Device to be granted acccess * @pasid: Address for allocated PASID + * @flags: Flags. Later for requesting supervisor mode, etc. + * @ops: Callbacks to device driver * * This function attempts to enable PASID support for the given device. * If the @pasid argument is non-%NULL, a PASID is allocated for access @@ -45,7 +58,8 @@ struct device; * Multiple calls from the same process may result in the same PASID * being re-used. A reference count is kept. */ -extern int intel_svm_bind_mm(struct device *dev, int *pasid); +extern int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, + struct svm_dev_ops *ops); /** * intel_svm_unbind_mm() - Unbind a specified PASID @@ -66,7 +80,8 @@ extern int intel_svm_unbind_mm(struct device *dev, int pasid); #else /* CONFIG_INTEL_IOMMU_SVM */ -static inline int intel_svm_bind_mm(struct device *dev, int *pasid) +static inline int intel_svm_bind_mm(struct device *dev, int *pasid, + int flags, struct svm_dev_ops *ops) { return -ENOSYS; } @@ -77,6 +92,6 @@ static inline int intel_svm_unbind_mm(struct device *dev, int pasid) } #endif /* CONFIG_INTEL_IOMMU_SVM */ -#define intel_svm_available(dev) (!intel_svm_bind_mm((dev), NULL)) +#define intel_svm_available(dev) (!intel_svm_bind_mm((dev), NULL, 0, NULL)) #endif /* __INTEL_SVM_H__ */ |