diff options
| author | Guo Ren <guoren@linux.alibaba.com> | 2022-04-05 15:13:07 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-04-26 13:36:36 -0700 |
| commit | 69d0bf4cc668387f8b8bf89c2b77568c7bbe722e (patch) | |
| tree | dcf7ed1843a7d59f72f2d5167b5d7380264ce21b /arch/riscv/kernel/process.c | |
| parent | dfb0bfa738f5c58b5c6e81262a0ee4ba154c3f28 (diff) | |
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: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20220405071314.3225832-14-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/kernel/process.c')
| -rw-r--r-- | arch/riscv/kernel/process.c | 9 |
1 files changed, 9 insertions, 0 deletions
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) |