From: Alexey Kardashevskiy <aik@xxxxxxxxx>
We are going to get rid of @current references in mmu_context_boos3s64.c
and cache mm_struct in the VFIO container. Since mm_context_t does not
have reference counting, we will be using mm_struct which does have
the reference counter.
This changes mm_iommu_init/mm_iommu_cleanup to receive mm_struct rather
than mm_context_t (which is embedded into mm).
This should not cause any behavioral change.
Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
Reviewed-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
arch/powerpc/include/asm/mmu_context.h | 4 ++--
arch/powerpc/kernel/setup-common.c | 2 +-
arch/powerpc/mm/mmu_context_book3s64.c | 4 ++--
arch/powerpc/mm/mmu_context_iommu.c | 9 +++++----
4 files changed, 10 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h
index 5c45114..424844b 100644
--- a/arch/powerpc/include/asm/mmu_context.h
+++ b/arch/powerpc/include/asm/mmu_context.h
@@ -23,8 +23,8 @@ extern bool mm_iommu_preregistered(void);
extern long mm_iommu_get(unsigned long ua, unsigned long entries,
struct mm_iommu_table_group_mem_t **pmem);
extern long mm_iommu_put(struct mm_iommu_table_group_mem_t *mem);
-extern void mm_iommu_init(mm_context_t *ctx);
-extern void mm_iommu_cleanup(mm_context_t *ctx);
+extern void mm_iommu_init(struct mm_struct *mm);
+extern void mm_iommu_cleanup(struct mm_struct *mm);
extern struct mm_iommu_table_group_mem_t *mm_iommu_lookup(unsigned long ua,
unsigned long size);
extern struct mm_iommu_table_group_mem_t *mm_iommu_find(unsigned long ua,
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 270ee30..f516ac5 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -915,7 +915,7 @@ void __init setup_arch(char **cmdline_p)
init_mm.context.pte_frag = NULL;
#endif
#ifdef CONFIG_SPAPR_TCE_IOMMU
- mm_iommu_init(&init_mm.context);
+ mm_iommu_init(&init_mm);
#endif
irqstack_early_init();
exc_lvl_early_init();
diff --git a/arch/powerpc/mm/mmu_context_book3s64.c b/arch/powerpc/mm/mmu_context_book3s64.c
index b114f8b..ad82735 100644
--- a/arch/powerpc/mm/mmu_context_book3s64.c
+++ b/arch/powerpc/mm/mmu_context_book3s64.c
@@ -115,7 +115,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
mm->context.pte_frag = NULL;
#endif
#ifdef CONFIG_SPAPR_TCE_IOMMU
- mm_iommu_init(&mm->context);
+ mm_iommu_init(mm);
#endif
return 0;
}
@@ -160,7 +160,7 @@ static inline void destroy_pagetable_page(struct mm_struct *mm)
void destroy_context(struct mm_struct *mm)
{
#ifdef CONFIG_SPAPR_TCE_IOMMU
- mm_iommu_cleanup(&mm->context);
+ mm_iommu_cleanup(mm);
#endif
#ifdef CONFIG_PPC_ICSWX
diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c
index e0f1c33..ad2e575 100644
--- a/arch/powerpc/mm/mmu_context_iommu.c
+++ b/arch/powerpc/mm/mmu_context_iommu.c
@@ -373,16 +373,17 @@ void mm_iommu_mapped_dec(struct mm_iommu_table_group_mem_t *mem)
}
EXPORT_SYMBOL_GPL(mm_iommu_mapped_dec);
-void mm_iommu_init(mm_context_t *ctx)
+void mm_iommu_init(struct mm_struct *mm)
{
- INIT_LIST_HEAD_RCU(&ctx->iommu_group_mem_list);
+ INIT_LIST_HEAD_RCU(&mm->context.iommu_group_mem_list);
}
-void mm_iommu_cleanup(mm_context_t *ctx)
+void mm_iommu_cleanup(struct mm_struct *mm)
{
struct mm_iommu_table_group_mem_t *mem, *tmp;
- list_for_each_entry_safe(mem, tmp, &ctx->iommu_group_mem_list, next) {
+ list_for_each_entry_safe(mem, tmp, &mm->context.iommu_group_mem_list,
+ next) {
list_del_rcu(&mem->next);
mm_iommu_do_free(mem);
}
--
2.9.3