[PATCH v6 08/19] arm64:ilp32: add is_ilp32_compat_{task, thread} and TIF_32BIT_AARCH64

Yury Norov
2015-11-17T21:16:48Z

From: Andrew Pinski <apinski@cavium.com>

Reviewed-by: David Daney <ddaney@caviumnetworks.com>

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Andrew Pinski <Andrew.Pinski@caviumnetworks.com>
---
arch/arm64/include/asm/compat.h | 38 +++++++++++++++++++++++++++++++++++-
arch/arm64/include/asm/thread_info.h | 1 +
2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index 9700e5e..95d2d72 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -324,9 +324,35 @@ 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
+
static inline int is_compat_task(void)
{
- return is_a32_compat_task();
+ return is_a32_compat_task() || is_ilp32_compat_task();
}

#else /* !CONFIG_COMPAT */
@@ -341,6 +367,16 @@ static inline int is_a32_compat_task(void)
return 0;
}

+static inline int is_ilp32_compat_thread(struct thread_info *thread)
+{
+ return 0;
+}
+
+static inline int is_ilp32_compat_task(void)
+{
+ return 0;
+}
+
#endif /* CONFIG_COMPAT */
#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 7d03565..e72de74 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -112,6 +112,7 @@ 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)
--
2.1.4