RE: [PATCH v7 07/10] iommu: Remove SVA related callbacks from iommu ops
> From: Lu Baolu
> Sent: Thursday, May 19, 2022 3:21 PM
>
> These ops'es have been replaced with the dev_attach/detach_pasid domain
> ops'es. There's no need for them anymore. Remove them to avoid dead
> code.
>
> Signed-off-by: Lu Baolu
> Reviewed-by: Jean-Philippe Brucker
Reviewed-by: Kevin Tian
> ---
> include/linux/intel-iommu.h | 3 --
> include/linux/iommu.h | 7 ---
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 16 --
> .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 40 ---
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 --
> drivers/iommu/intel/iommu.c | 3 --
> drivers/iommu/intel/svm.c | 49 ---
> 7 files changed, 121 deletions(-)
>
> diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
> index 5e88eaa245aa..536f229fd274 100644
> --- a/include/linux/intel-iommu.h
> +++ b/include/linux/intel-iommu.h
> @@ -739,9 +739,6 @@ struct intel_iommu *device_to_iommu(struct device
> *dev, u8 *bus, u8 *devfn);
> extern void intel_svm_check(struct intel_iommu *iommu);
> extern int intel_svm_enable_prq(struct intel_iommu *iommu);
> extern int intel_svm_finish_prq(struct intel_iommu *iommu);
> -struct iommu_sva *intel_svm_bind(struct device *dev, struct mm_struct
> *mm);
> -void intel_svm_unbind(struct iommu_sva *handle);
> -u32 intel_svm_get_pasid(struct iommu_sva *handle);
> int intel_svm_page_response(struct device *dev, struct iommu_fault_event
> *evt,
> struct iommu_page_response *msg);
> int intel_svm_attach_dev_pasid(struct iommu_domain *domain,
> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index d9ac5ebe5bbb..e4ce2fe0e144 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -212,9 +212,6 @@ struct iommu_iotlb_gather {
> * @dev_has/enable/disable_feat: per device entries to
> check/enable/disable
> * iommu specific features.
> * @dev_feat_enabled: check enabled feature
> - * @sva_bind: Bind process address space to device
> - * @sva_unbind: Unbind process address space from device
> - * @sva_get_pasid: Get PASID associated to a SVA handle
> * @page_response: handle page request response
> * @def_domain_type: device default domain type, return value:
> * - IOMMU_DOMAIN_IDENTITY: must use an identity domain
> @@ -248,10 +245,6 @@ struct iommu_ops {
> int (*dev_enable_feat)(struct device *dev, enum
> iommu_dev_features f);
> int (*dev_disable_feat)(struct device *dev, enum
> iommu_dev_features f);
>
> - struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct
> *mm);
> - void (*sva_unbind)(struct iommu_sva *handle);
> - u32 (*sva_get_pasid)(struct iommu_sva *handle);
> -
> int (*page_response)(struct device *dev,
>struct iommu_fault_event *evt,
>struct iommu_page_response *msg);
> diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
> b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
> index ec77f6a51ff9..0f0f5ba26dd5 100644
> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
> @@ -754,9 +754,6 @@ bool arm_smmu_master_sva_enabled(struct
> arm_smmu_master *master);
> int arm_smmu_master_enable_sva(struct arm_smmu_master *master);
> int arm_smmu_master_disable_sva(struct arm_smmu_master *master);
> bool arm_smmu_master_iopf_supported(struct arm_smmu_master
> *master);
> -struct iommu_sva *arm_smmu_sva_bind(struct device *dev, struct
> mm_struct *mm);
> -void arm_smmu_sva_unbind(struct iommu_sva *handle);
> -u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle);
> void arm_smmu_sva_notifier_synchronize(void);
> int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain,
> struct device *dev, ioasid_t id);
> @@ -793,19 +790,6 @@ static inline bool
> arm_smmu_master_iopf_supported(struct arm_smmu_master *master
> return false;
> }
>
> -static inline struct iommu_sva *
> -arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
> -{
> - return ERR_PTR(-ENODEV);
> -}
> -
> -static inline void arm_smmu_sva_unbind(struct iommu_sva *handle) {}
> -
> -static inline u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle)
> -{
> - return IOMMU_PASID_INVALID;
> -}
> -
> static inline void arm_smmu_sva_notifier_synchronize(void) {}
> #endif /* CONFIG_ARM_SMMU_V3_SVA */
> #endif /* _ARM_SMMU_V3_H */
> diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
> b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
> index 6969974ca89e..8290d66569f3 100644
> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
> @@ -344,11 +344,6 @@ __arm_smmu_sva_bind(struct device *dev, struct
> mm_struct *mm)
> if (!bond)
> return ERR_PTR(-ENOMEM);
>
> - /* Allocate a PASID for this mm if
[PATCH v7 07/10] iommu: Remove SVA related callbacks from iommu ops
These ops'es have been replaced with the dev_attach/detach_pasid domain
ops'es. There's no need for them anymore. Remove them to avoid dead
code.
Signed-off-by: Lu Baolu
Reviewed-by: Jean-Philippe Brucker
---
include/linux/intel-iommu.h | 3 --
include/linux/iommu.h | 7 ---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 16 --
.../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 40 ---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 --
drivers/iommu/intel/iommu.c | 3 --
drivers/iommu/intel/svm.c | 49 ---
7 files changed, 121 deletions(-)
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 5e88eaa245aa..536f229fd274 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -739,9 +739,6 @@ struct intel_iommu *device_to_iommu(struct device *dev, u8
*bus, u8 *devfn);
extern void intel_svm_check(struct intel_iommu *iommu);
extern int intel_svm_enable_prq(struct intel_iommu *iommu);
extern int intel_svm_finish_prq(struct intel_iommu *iommu);
-struct iommu_sva *intel_svm_bind(struct device *dev, struct mm_struct *mm);
-void intel_svm_unbind(struct iommu_sva *handle);
-u32 intel_svm_get_pasid(struct iommu_sva *handle);
int intel_svm_page_response(struct device *dev, struct iommu_fault_event *evt,
struct iommu_page_response *msg);
int intel_svm_attach_dev_pasid(struct iommu_domain *domain,
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index d9ac5ebe5bbb..e4ce2fe0e144 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -212,9 +212,6 @@ struct iommu_iotlb_gather {
* @dev_has/enable/disable_feat: per device entries to check/enable/disable
* iommu specific features.
* @dev_feat_enabled: check enabled feature
- * @sva_bind: Bind process address space to device
- * @sva_unbind: Unbind process address space from device
- * @sva_get_pasid: Get PASID associated to a SVA handle
* @page_response: handle page request response
* @def_domain_type: device default domain type, return value:
* - IOMMU_DOMAIN_IDENTITY: must use an identity domain
@@ -248,10 +245,6 @@ struct iommu_ops {
int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
- struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm);
- void (*sva_unbind)(struct iommu_sva *handle);
- u32 (*sva_get_pasid)(struct iommu_sva *handle);
-
int (*page_response)(struct device *dev,
struct iommu_fault_event *evt,
struct iommu_page_response *msg);
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
index ec77f6a51ff9..0f0f5ba26dd5 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -754,9 +754,6 @@ bool arm_smmu_master_sva_enabled(struct arm_smmu_master
*master);
int arm_smmu_master_enable_sva(struct arm_smmu_master *master);
int arm_smmu_master_disable_sva(struct arm_smmu_master *master);
bool arm_smmu_master_iopf_supported(struct arm_smmu_master *master);
-struct iommu_sva *arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm);
-void arm_smmu_sva_unbind(struct iommu_sva *handle);
-u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle);
void arm_smmu_sva_notifier_synchronize(void);
int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain,
struct device *dev, ioasid_t id);
@@ -793,19 +790,6 @@ static inline bool arm_smmu_master_iopf_supported(struct
arm_smmu_master *master
return false;
}
-static inline struct iommu_sva *
-arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
-{
- return ERR_PTR(-ENODEV);
-}
-
-static inline void arm_smmu_sva_unbind(struct iommu_sva *handle) {}
-
-static inline u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle)
-{
- return IOMMU_PASID_INVALID;
-}
-
static inline void arm_smmu_sva_notifier_synchronize(void) {}
#endif /* CONFIG_ARM_SMMU_V3_SVA */
#endif /* _ARM_SMMU_V3_H */
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index 6969974ca89e..8290d66569f3 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -344,11 +344,6 @@ __arm_smmu_sva_bind(struct device *dev, struct mm_struct
*mm)
if (!bond)
return ERR_PTR(-ENOMEM);
- /* Allocate a PASID for this mm if necessary */
- ret = iommu_sva_alloc_pasid(mm, 1, (1U << master->ssid_bits) - 1);
- if (ret)
- goto err_free_bond;
-
bond->mm = mm;
bond->sva.dev = dev;
refcount_set(&bond->refs, 1);
@@ -367,41 +362,6 @@ __arm_smmu_sva
