Unverified Commit 69d0bf4c authored by Guo Ren's avatar Guo Ren Committed by Palmer Dabbelt
Browse files

riscv: compat: process: Add UXL_32 support in start_thread 



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: default avatarGuo Ren <guoren@linux.alibaba.com>
Signed-off-by: default avatarGuo Ren <guoren@kernel.org>
Tested-by: default avatarHeiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20220405071314.3225832-14-guoren@kernel.org


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent dfb0bfa7

arch/riscv/kernel/process.c

+9 −0
Original line number Diff line number Diff line
@@ -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)