arm64: mm: Pin down ASIDs for sharing mm with devices

[linux-2.6-microblaze.git] / arch / arm64 / include / asm / mmu_context.h

diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h
index f2d7537..0672236 100644 (file)
--- a/arch/arm64/include/asm/mmu_context.h
+++ b/arch/arm64/include/asm/mmu_context.h
@@ -177,7 +177,13 @@ static inline void cpu_replace_ttbr1(pgd_t *pgdp)
 #define destroy_context(mm)            do { } while(0)
 void check_and_switch_context(struct mm_struct *mm);
 
-#define init_new_context(tsk,mm)       ({ atomic64_set(&(mm)->context.id, 0); 0; })
+static inline int
+init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+       atomic64_set(&mm->context.id, 0);
+       refcount_set(&mm->context.pinned, 0);
+       return 0;
+}
 
 #ifdef CONFIG_ARM64_SW_TTBR0_PAN
 static inline void update_saved_ttbr0(struct task_struct *tsk,
@@ -248,6 +254,9 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
 void verify_cpu_asid_bits(void);
 void post_ttbr_update_workaround(void);
 
+unsigned long arm64_mm_context_get(struct mm_struct *mm);
+void arm64_mm_context_put(struct mm_struct *mm);
+
 #endif /* !__ASSEMBLY__ */
 
 #endif /* !__ASM_MMU_CONTEXT_H */