Re: [Qemu-devel] [PATCH v2] target-ppc: Add MMU model check for booke machines

["Edgar E. Iglesias" <edgar.iglesias@gmail.com>]

On Wed, Jan 25, 2017 at 02:50:30PM +0000, Valentin Plotkin wrote:
> Machines bamboo, e500 and virtex-ml507 assume a certain MMU model,
> otherwise resulting in unpredictable behavior. Add apropriate checks
> into *_init functions.

The Virtex part looks OK.
I couldn't apply the patch with git am though...



> 
> Signed-off-by: Valentin <caliborn@sdf.org>
> ---
>  hw/ppc/e500.c          | 6 ++++++
>  hw/ppc/ppc440_bamboo.c | 6 ++++++
>  hw/ppc/virtex_ml507.c  | 7 +++++++
>  3 files changed, 19 insertions(+)
> 
> diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
> index cf8b122..5b1958c 100644
> --- a/hw/ppc/e500.c
> +++ b/hw/ppc/e500.c
> @@ -827,6 +827,12 @@ void ppce500_init(MachineState *machine, PPCE500Params *params)
>          env = &cpu->env;
>          cs = CPU(cpu);
> 
> +        if (env->mmu_model != POWERPC_MMU_BOOKE206) {
> +            fprintf(stderr, "MMU model %i not supported by this machine.\n",
> +                env->mmu_model);
> +            exit(1);
> +        }
> +
>          if (!firstenv) {
>              firstenv = env;
>          }
> diff --git a/hw/ppc/ppc440_bamboo.c b/hw/ppc/ppc440_bamboo.c
> index 5c535b1..9d997bf 100644
> --- a/hw/ppc/ppc440_bamboo.c
> +++ b/hw/ppc/ppc440_bamboo.c
> @@ -193,6 +193,12 @@ static void bamboo_init(MachineState *machine)
>      }
>      env = &cpu->env;
> 
> +    if (env->mmu_model != POWERPC_MMU_BOOKE) {
> +        fprintf(stderr, "MMU model %i not supported by this machine.\n",
> +            env->mmu_model);
> +        exit(1);
> +    }
> +
>      qemu_register_reset(main_cpu_reset, cpu);
>      ppc_booke_timers_init(cpu, 400000000, 0);
>      ppc_dcr_init(env, NULL, NULL);
> diff --git a/hw/ppc/virtex_ml507.c b/hw/ppc/virtex_ml507.c
> index b97d966..fdbcf22 100644
> --- a/hw/ppc/virtex_ml507.c
> +++ b/hw/ppc/virtex_ml507.c
> @@ -221,6 +221,13 @@ static void virtex_init(MachineState *machine)
> 
>      cpu = ppc440_init_xilinx(&ram_size, 1, machine->cpu_model, 400000000);
>      env = &cpu->env;
> +
> +    if (env->mmu_model != POWERPC_MMU_BOOKE) {
> +        fprintf(stderr, "MMU model %i not supported by this machine.\n",
> +            env->mmu_model);
> +        exit(1);
> +    }
> +
>      qemu_register_reset(main_cpu_reset, cpu);
> 
>      memory_region_allocate_system_memory(phys_ram, NULL, "ram", ram_size);
> -- 
> 2.5.5
> 
> 
> This fixes 'qemu-system-ppc -nographic -cpu G2leGP3 -M ppce500; bug from
> BiteSizedTasks.
> 
> Version 2: fixed style, moved checks from mmubooke_create_initial_mapping
> to *_init. Thanks to Thomas Huth <thuth@redhat.com>.