On 11/12/15 19:54, Andrew Pinski wrote:
> Hi,
> The Linux kernel calls lse as atomics in /proc/cpuinfo. We should
> change aarch64-option-extensions.def to take that into account.
>
> OK? Bootstrapped and tested on aarch64-linux-gnu with no regressions
> and tested with -mcpu=native on ThunderX T88 pass 2 with Linux 4.4 to
> see if lse gets enabled.
>
> Thanks,
> Andrew Pinski
>
> ChangeLog:
> * config/aarch64/aarch64-option-extensions.def (LSE): Change
> FEAT_STRING to "atomics".
>
Matthew checked in the original patch and he's currently on vacation, so
I can't check why he put 'lse' here. However, I've checked with the
kernel team and they've confirmed that 'atomics' is correct, so OK.
R.
>
> fixlse.diff.txt
>
>
> Index: aarch64-option-extensions.def
> ===================================================================
> --- aarch64-option-extensions.def (revision 231572)
> +++ aarch64-option-extensions.def (working copy)
> @@ -40,4 +40,4 @@ AARCH64_OPT_EXTENSION ("simd", AARCH64_F
> AARCH64_FL_SIMD | AARCH64_FL_CRYPTO, "asimd")
> AARCH64_OPT_EXTENSION("crypto", AARCH64_FL_CRYPTO | AARCH64_FL_FPSIMD,
> AARCH64_FL_CRYPTO, "aes pmull sha1 sha2")
> AARCH64_OPT_EXTENSION("crc", AARCH64_FL_CRC,
> AARCH64_FL_CRC, "crc32")
> -AARCH64_OPT_EXTENSION("lse", AARCH64_FL_LSE,
> AARCH64_FL_LSE, "lse")
> +AARCH64_OPT_EXTENSION("lse", AARCH64_FL_LSE,
> AARCH64_FL_LSE, "atomics")
>
