[PATCH v3 2/5] iommu/sva: Move PASID helpers to sva code

Jacob Pan
2023-02-16T23:56:32Z

Preparing to remove IOASID infrastructure, PASID management will be
under SVA code.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
drivers/iommu/iommu-sva.c | 19 +++++++++++++++++++
include/linux/sched/mm.h | 22 +++-------------------
2 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/iommu-sva.c b/drivers/iommu/iommu-sva.c
index 24bf9b2b58aa..a3ee258936f0 100644
--- a/drivers/iommu/iommu-sva.c
+++ b/drivers/iommu/iommu-sva.c
@@ -71,6 +71,25 @@ struct mm_struct *iommu_sva_find(ioasid_t pasid)
}
EXPORT_SYMBOL_GPL(iommu_sva_find);

+void mm_pasid_init(struct mm_struct *mm)
+{
+ mm->pasid = INVALID_IOASID;
+}
+
+/* Associate a PASID with an mm_struct: */
+void mm_pasid_set(struct mm_struct *mm, u32 pasid)
+{
+ mm->pasid = pasid;
+}
+
+void mm_pasid_drop(struct mm_struct *mm)
+{
+ if (pasid_valid(mm->pasid)) {
+ ioasid_free(mm->pasid);
+ mm->pasid = INVALID_IOASID;
+ }
+}
+
/**
* iommu_sva_bind_device() - Bind a process address space to a device
* @dev: the device
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index 2a243616f222..c488c7241102 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -8,7 +8,6 @@
#include <linux/mm_types.h>
#include <linux/gfp.h>
#include <linux/sync_core.h>
-#include <linux/ioasid.h>

/*
* Routines for handling mm_structs
@@ -452,24 +451,9 @@ static inline void membarrier_update_current_mm(struct mm_struct *next_mm)
#endif

#ifdef CONFIG_IOMMU_SVA
-static inline void mm_pasid_init(struct mm_struct *mm)
-{
- mm->pasid = INVALID_IOASID;
-}
-
-/* Associate a PASID with an mm_struct: */
-static inline void mm_pasid_set(struct mm_struct *mm, u32 pasid)
-{
- mm->pasid = pasid;
-}
-
-static inline void mm_pasid_drop(struct mm_struct *mm)
-{
- if (pasid_valid(mm->pasid)) {
- ioasid_free(mm->pasid);
- mm->pasid = INVALID_IOASID;
- }
-}
+void mm_pasid_init(struct mm_struct *mm);
+void mm_pasid_set(struct mm_struct *mm, u32 pasid);
+void mm_pasid_drop(struct mm_struct *mm);
#else
static inline void mm_pasid_init(struct mm_struct *mm) {}
static inline void mm_pasid_set(struct mm_struct *mm, u32 pasid) {}
--
2.25.1