Re: [Qemu-devel] [PATCH 5/5] target-arm: Thread ID Registers are ARMv6K +

[Laurent Desnogues <laurent.desnogues@gmail.com>]

On Tue, Jan 26, 2010 at 5:00 PM, Riku Voipio <riku.voipio@iki.fi> wrote:
> From: Riku Voipio <riku.voipio@nokia.com>
>
> Change the system-emulation code also to only support accessing
> the cp15.c13 Thread ID registers on ARMv6K and newer.
>
> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
> ---
>  target-arm/helper.c |   12 ++++++++++++
>  1 files changed, 12 insertions(+), 0 deletions(-)
>
> diff --git a/target-arm/helper.c b/target-arm/helper.c
> index 68578ce..1245d9d 100644
> --- a/target-arm/helper.c
> +++ b/target-arm/helper.c
> @@ -1517,12 +1517,18 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
>             env->cp15.c13_context = val;
>             break;
>         case 2:
> +            if (!arm_feature(env, ARM_FEATURE_V6K))
> +                goto bad_reg;
>             env->cp15.c13_tls1 = val;
>             break;
>         case 3:
> +            if (!arm_feature(env, ARM_FEATURE_V6K))
> +                goto bad_reg;
>             env->cp15.c13_tls2 = val;
>             break;
>         case 4:
> +            if (!arm_feature(env, ARM_FEATURE_V6K))
> +                goto bad_reg;
>             env->cp15.c13_tls3 = val;
>             break;
>         default:
> @@ -1805,10 +1811,16 @@ uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
>         case 1:
>             return env->cp15.c13_context;
>         case 2:
> +            if (!arm_feature(env, ARM_FEATURE_V6K))
> +                goto bad_reg;
>             return env->cp15.c13_tls1;
>         case 3:
> +            if (!arm_feature(env, ARM_FEATURE_V6K))
> +                goto bad_reg;
>             return env->cp15.c13_tls2;
>         case 4:
> +            if (!arm_feature(env, ARM_FEATURE_V6K))
> +                goto bad_reg;
>             return env->cp15.c13_tls3;
>         default:
>             goto bad_reg;

Same question as for user mode :-)


Laurent