Re: [PATCH 16/24] bsd-user/arm/target_arch_elf.h: arm get_hwcap2 impl

[Kyle Evans]

On Tue, Oct 19, 2021 at 11:45 AM Warner Losh <imp@bsdimp.com> wrote:
>
> Implement the extended HW capabilities for HWCAP2.
>
> Signed-off-by: Klye Evans <kevans@FreeBSD.org>
> Signed-off-by: Warner Losh <imp@bsdimp.com>
> ---
>  bsd-user/arm/target_arch_elf.h | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/bsd-user/arm/target_arch_elf.h b/bsd-user/arm/target_arch_elf.h
> index 02d25b8926..4a0215d02e 100644
> --- a/bsd-user/arm/target_arch_elf.h
> +++ b/bsd-user/arm/target_arch_elf.h
> @@ -32,6 +32,7 @@
>  #define ELF_EXEC_PAGESIZE       4096
>
>  #define ELF_HWCAP get_elf_hwcap()
> +#define ELF_HWCAP2 get_elf_hwcap2()
>
>  #define GET_FEATURE(feat, hwcap) \
>      do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
> @@ -64,6 +65,14 @@ enum {
>      ARM_HWCAP_ARM_EVTSTRM   = 1 << 21,
>  };
>
> +enum {
> +    ARM_HWCAP2_ARM_AES      = 1 << 0,
> +    ARM_HWCAP2_ARM_PMULL    = 1 << 1,
> +    ARM_HWCAP2_ARM_SHA1     = 1 << 2,
> +    ARM_HWCAP2_ARM_SHA2     = 1 << 3,
> +    ARM_HWCAP2_ARM_CRC32    = 1 << 4,
> +};
> +
>  static uint32_t get_elf_hwcap(void)
>  {
>      ARMCPU *cpu = ARM_CPU(thread_cpu);
> @@ -100,6 +109,19 @@ static uint32_t get_elf_hwcap(void)
>      return hwcaps;
>  }
>
> +static uint32_t get_elf_hwcap2(void)
> +{
> +    ARMCPU *cpu = ARM_CPU(thread_cpu);
> +    uint32_t hwcaps = 0;
> +
> +    GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES);
> +    GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL);
> +    GET_FEATURE_ID(aa32_sha1, ARM_HWCAP2_ARM_SHA1);
> +    GET_FEATURE_ID(aa32_sha2, ARM_HWCAP2_ARM_SHA2);
> +    GET_FEATURE_ID(aa32_crc32, ARM_HWCAP2_ARM_CRC32);
> +    return hwcaps;
> +}
> +
>  #undef GET_FEATURE
>  #undef GET_FEATURE_ID
>
> --
> 2.32.0
>

Reviewed-by: Kyle Evans <kevans@FreeBSD.org>