[PATCH v2 1/7] powerpc: Add new HWCAP bits

[Paul A. Clarke]

On Tue, May 19, 2020 at 10:31:51AM +1000, Alistair Popple wrote:
> POWER10 introduces two new architectural features - ISAv3.1 and matrix
> multiply accumulate (MMA) instructions. Userspace detects the presence
> of these features via two HWCAP bits introduced in this patch. These
> bits have been agreed to by the compiler and binutils team.
> 
> Signed-off-by: Alistair Popple <alistair at popple.id.au>
> ---
>  arch/powerpc/include/uapi/asm/cputable.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/powerpc/include/uapi/asm/cputable.h b/arch/powerpc/include/uapi/asm/cputable.h
> index 540592034740..2692a56bf20b 100644
> --- a/arch/powerpc/include/uapi/asm/cputable.h
> +++ b/arch/powerpc/include/uapi/asm/cputable.h
> @@ -50,6 +50,8 @@
>  #define PPC_FEATURE2_DARN		0x00200000 /* darn random number insn */
>  #define PPC_FEATURE2_SCV		0x00100000 /* scv syscall */
>  #define PPC_FEATURE2_HTM_NO_SUSPEND	0x00080000 /* TM w/out suspended state */
> +#define PPC_FEATURE2_ARCH_3_1		0x00040000 /* ISA 3.1 */
> +#define PPC_FEATURE2_MMA		0x00020000 /* Matrix Multiply Accumulate */

Carrying the conclusion of the recent discussion further, this should also be
"Matrix-Multiply Assist".

PC