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Subject[PATCH 12/24] ARM64: Add is_ilp32_compat_task and is_ilp32_compat_thread and TIF_32BIT_AARCH64.
Date
This patch adds the thread bit for ILP32 and has is_compat_task return true in that case.  We don't set it yet though.

Thanks,
Andrew Pinski

Signed-off-by: Andrew Pinski <apinski@cavium.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 fad7612..85f945c 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -313,6 +313,26 @@ 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_a32_compat_task(void)
@@ -323,17 +343,25 @@ static inline int is_a32_compat_thread(struct thread_info *thread)
{
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 b2bf728..98baf65 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -108,6 +108,7 @@ 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)
--
1.7.2.5


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