diff options
Diffstat (limited to 'arch/riscv/lib/uaccess_vector.S')
| -rw-r--r-- | arch/riscv/lib/uaccess_vector.S | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/riscv/lib/uaccess_vector.S b/arch/riscv/lib/uaccess_vector.S index 7c45f26de4f7..03b5560609a2 100644 --- a/arch/riscv/lib/uaccess_vector.S +++ b/arch/riscv/lib/uaccess_vector.S @@ -24,7 +24,18 @@ SYM_FUNC_START(__asm_vector_usercopy) /* Enable access to user memory */ li t6, SR_SUM csrs CSR_STATUS, t6 + mv t6, ra + call __asm_vector_usercopy_sum_enabled + + /* Disable access to user memory */ + mv ra, t6 + li t6, SR_SUM + csrc CSR_STATUS, t6 + ret +SYM_FUNC_END(__asm_vector_usercopy) + +SYM_FUNC_START(__asm_vector_usercopy_sum_enabled) loop: vsetvli iVL, iNum, e8, ELEM_LMUL_SETTING, ta, ma fixup vle8.v vData, (pSrc), 10f @@ -36,8 +47,6 @@ loop: /* Exception fixup for vector load is shared with normal exit */ 10: - /* Disable access to user memory */ - csrc CSR_STATUS, t6 mv a0, iNum ret @@ -49,4 +58,4 @@ loop: csrr t2, CSR_VSTART sub iNum, iNum, t2 j 10b -SYM_FUNC_END(__asm_vector_usercopy) +SYM_FUNC_END(__asm_vector_usercopy_sum_enabled) |