[PATCH V2 16/17] riscv: compat: Add UXL_32 support in start_thread
guoren at kernel.org
guoren at kernel.org
Tue Dec 28 06:39:57 PST 2021
From: Guo Ren <guoren at linux.alibaba.com>
If the current task is in COMPAT mode, set SR_UXL_32 in status for
returning userspace.
Signed-off-by: Guo Ren <guoren at linux.alibaba.com>
Signed-off-by: Guo Ren <guoren at kernel.org>
Cc: Arnd Bergmann <arnd at arndb.de>
---
arch/riscv/kernel/process.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 03ac3aa611f5..1a666ad299b4 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -97,6 +97,11 @@ void start_thread(struct pt_regs *regs, unsigned long pc,
}
regs->epc = pc;
regs->sp = sp;
+
+#ifdef CONFIG_COMPAT
+ if (is_compat_task())
+ regs->status |= SR_UXL_32;
+#endif
}
void flush_thread(void)
--
2.25.1
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