Re: [Qemu-devel] [PATCH v1 5/5] target-microblaze: mmu: Make the TLBX MISS bit read-only

[Alistair Francis <alistair23@gmail.com>]

On Thu, Apr 19, 2018 at 4:21 AM, Edgar E. Iglesias
<edgar.iglesias@gmail.com> wrote:
> From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
>
> Make the TLBX MISS bit read-only.
>
> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  target/microblaze/mmu.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/target/microblaze/mmu.c b/target/microblaze/mmu.c
> index 8391811900..9d5e6aa8a5 100644
> --- a/target/microblaze/mmu.c
> +++ b/target/microblaze/mmu.c
> @@ -273,6 +273,10 @@ void mmu_write(CPUMBState *env, uint32_t rn, uint32_t v)
>                  env->mmu.regs[rn] = v;
>              }
>              break;
> +        case MMU_R_TLBX:
> +            /* Bit 31 is read-only.  */
> +            env->mmu.regs[rn] = deposit32(env->mmu.regs[rn], 0, 31, v);
> +            break;
>          case MMU_R_TLBSX:
>          {
>              struct microblaze_mmu_lookup lu;
> --
> 2.14.1
>
>