[PATCH v4 11/24] arm64:ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64

[Philipp Tomsich]

From: Andrew Pinski <apin...@cavium.com>

Signed-off-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muell...@theobroma-systems.com>
---
 arch/arm64/include/asm/compat.h      | 32 ++++++++++++++++++++++++++++++--
 arch/arm64/include/asm/thread_info.h |  1 +
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index 3a2976d..f53c4e6 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -319,6 +319,26 @@ static inline int is_a32_compat_thread(struct thread_info 
*thread)
 }
 #endif
 
+#ifdef CONFIG_ARM64_ILP32
+static inline int is_ilp32_compat_task(void)
+{
+       return test_thread_flag(TIF_32BIT_AARCH64);
+}
+static inline int is_ilp32_compat_thread(struct thread_info *thread)
+{
+       return test_ti_thread_flag(thread, TIF_32BIT_AARCH64);
+}
+#else
+static inline int is_ilp32_compat_task(void)
+{
+       return 0;
+}
+static inline int is_ilp32_compat_thread(struct thread_info *thread)
+{
+       return 0;
+}
+#endif
+
 #else /* !CONFIG_COMPAT */
 
 static inline int is_compat_thread(struct thread_info *thread)
@@ -330,17 +350,25 @@ static inline int is_a32_compat_task(void)
 {
        return 0;
 }
+static inline int is_ilp32_compat_task(void)
+{
+       return 0;
+}
+static inline int is_ilp32_compat_thread(struct thread_info *thread)
+{
+       return 0;
+}
 
 #endif /* CONFIG_COMPAT */
 
 static inline int is_compat_task(void)
 {
-       return is_a32_compat_task();
+       return is_a32_compat_task() || is_ilp32_compat_task();
 }
 
 static inline int is_compat_thread(struct thread_info *thread)
 {
-       return is_a32_compat_thread(thread);
+       return is_a32_compat_thread(thread) || is_ilp32_compat_thread(thread);
 }
 #endif /* __KERNEL__ */
 #endif /* __ASM_COMPAT_H */
diff --git a/arch/arm64/include/asm/thread_info.h 
b/arch/arm64/include/asm/thread_info.h
index 75f8d56..d41586c 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -115,6 +115,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_SINGLESTEP         21
 #define TIF_32BIT              22      /* AARCH32 process */
 #define TIF_SWITCH_MM          23      /* deferred switch_mm */
+#define TIF_32BIT_AARCH64      24      /* 32 bit process on AArch64(ILP32) */
 
 #define _TIF_SIGPENDING                (1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED      (1 << TIF_NEED_RESCHED)
-- 
1.9.1

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