在 2023/6/14 下午2:55, Jiajie Chen 写道:
> The previous code checks whether the highest 16 bits of virtual address
> equal to that of CSR.DMW0-3. This is incorrect according to the spec,
> and is corrected to compare only the highest four bits instead.
>
> Signed-off-by: Jiajie Chen <c@jia.je>
> ---
> target/loongarch/tlb_helper.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Song Gao <gaosong@loongson.cn>
Thanks.
Song Gao
> diff --git a/target/loongarch/tlb_helper.c b/target/loongarch/tlb_helper.c
> index cce1db1e0a..6e00190547 100644
> --- a/target/loongarch/tlb_helper.c
> +++ b/target/loongarch/tlb_helper.c
> @@ -185,10 +185,10 @@ static int get_physical_address(CPULoongArchState *env, hwaddr *physical,
> }
>
> plv = kernel_mode | (user_mode << R_CSR_DMW_PLV3_SHIFT);
> - base_v = address >> TARGET_VIRT_ADDR_SPACE_BITS;
> + base_v = address >> R_CSR_DMW_VSEG_SHIFT;
> /* Check direct map window */
> for (int i = 0; i < 4; i++) {
> - base_c = env->CSR_DMW[i] >> TARGET_VIRT_ADDR_SPACE_BITS;
> + base_c = FIELD_EX64(env->CSR_DMW[i], CSR_DMW, VSEG);
> if ((plv & env->CSR_DMW[i]) && (base_c == base_v)) {
> *physical = dmw_va2pa(address);
> *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;