From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> If the current task is in COMPAT mode, set SR_UXL_32 in status for returning userspace. We need CONFIG _COMPAT to prevent compiling errors with rv32 defconfig. Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> Signed-off-by: Guo Ren <guoren@xxxxxxxxxx> Tested-by: Heiko Stuebner <heiko@xxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx> --- arch/riscv/kernel/process.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 504b496787aa..b4421c16198c 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -98,6 +98,15 @@ void start_thread(struct pt_regs *regs, unsigned long pc, } regs->epc = pc; regs->sp = sp; + +#ifdef CONFIG_64BIT + regs->status &= ~SR_UXL; + + if (is_compat_task()) + regs->status |= SR_UXL_32; + else + regs->status |= SR_UXL_64; +#endif } void flush_thread(void) -- 2.25.1
