On Mon, 2010-06-21 at 14:51 +0100, Tony Lindgren wrote:
> diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
> index 315a540..19ba626 100644
> --- a/arch/arm/vfp/vfpmodule.c
> +++ b/arch/arm/vfp/vfpmodule.c
> @@ -549,10 +549,14 @@ static int __init vfp_init(void)
> /*
> * Check for the presence of the Advanced SIMD
> * load/store instructions, integer and single
> - * precision floating point operations.
> + * precision floating point operations. Only check
> + * for NEON if the hardware has TLS register as the
> + * MVFR registers got added in ARM1136 r1p0 with TLS.
> */
> - if ((fmrx(MVFR1) & 0x000fff00) == 0x00011100)
> - elf_hwcap |= HWCAP_NEON;
> + if (elf_hwcap & HWCAP_TLS) {
> + if ((fmrx(MVFR1) & 0x000fff00) == 0x00011100)
> + elf_hwcap |= HWCAP_NEON;
> + }
MVFR should be available with the new CPU id format:
((read_cpuid_id() & 0x000f0000) == 0x000f0000)
I think that would be a cleaner test than relying on the TLS presence.
--
Catalin
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