From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> The RV64ILP32 32-bit Linux kernel uses the same userspace address range as the 64-bit Linux compat mode, about 2GB. They have no difference from the hardware view, and all are running ILP32 on a 64-bit ISA. But the standard 32ilp32 Linux has a slightly bigger userspace address space, about 2.4GB. Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> Signed-off-by: Guo Ren <guoren@xxxxxxxxxx> --- arch/riscv/include/asm/pgtable.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 75970ee2bda2..e5e7a929949a 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -839,20 +839,25 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte) * "load and store effective addresses, which are 64bits, must have bits * 63–48 all equal to bit 47, or else a page-fault exception will occur." */ +#define TASK_SIZE_32 (_AC(0x80000000, UL) - PAGE_SIZE) + #ifdef CONFIG_64BIT #define TASK_SIZE_64 (PGDIR_SIZE * PTRS_PER_PGD / 2) #define TASK_SIZE_MIN (PGDIR_SIZE_L3 * PTRS_PER_PGD / 2) #ifdef CONFIG_COMPAT -#define TASK_SIZE_32 (_AC(0x80000000, UL) - PAGE_SIZE) #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) #else #define TASK_SIZE TASK_SIZE_64 #endif +#else +#ifdef CONFIG_ARCH_RV64ILP32 +#define TASK_SIZE TASK_SIZE_32 #else #define TASK_SIZE FIXADDR_START +#endif #define TASK_SIZE_MIN TASK_SIZE #endif -- 2.36.1
