Re: [PATCH] linux-user: Add PowerPC ISA 3.1 and MMA to hwcap

[Daniel Henrique Barboza <danielhb413@gmail.com>]

On 4/27/22 03:42, Joel Stanley wrote:
> These are new hwcap bits added for power10.
> 
> Signed-off-by: Joel Stanley <joel@jms.id.au>
> ---
> MMA support for TCG is on the list so I think it makes sense for this to
> land after those are merged.

I believe you mean this series:


[RFC PATCH 0/7] VSX MMA Implementation


In that case I'll queue this patch together with it.



Thanks,


Daniel


> 
> I tested my patch with this program:
> 
>   https://github.com/shenki/p10_tests
> 
> $ qemu-ppc64le -cpu power10  -L ~/ppc64le/ ./test -c
> HWCAP: 0x58000580 HWCAP2: 0x8ee60000
> ISAv3.1: Yes
> MMA: Yes
> 
> $ qemu-ppc64le -cpu power9  -L ~/ppc64le/ ./test -c
> HWCAP: 0x58000580 HWCAP2: 0x8ee00000
> ISAv3.1: No
> MMA: No
> 
>   linux-user/elfload.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/linux-user/elfload.c b/linux-user/elfload.c
> index 61063fd974e5..0908692e62b3 100644
> --- a/linux-user/elfload.c
> +++ b/linux-user/elfload.c
> @@ -779,6 +779,8 @@ enum {
>       QEMU_PPC_FEATURE2_DARN = 0x00200000, /* darn random number insn */
>       QEMU_PPC_FEATURE2_SCV = 0x00100000, /* scv syscall */
>       QEMU_PPC_FEATURE2_HTM_NO_SUSPEND = 0x00080000, /* TM w/o suspended state */
> +    QEMU_PPC_FEATURE2_ARCH_3_1 = 0x00040000, /* ISA 3.1 */
> +    QEMU_PPC_FEATURE2_MMA = 0x00020000, /* Matrix-Multiply Assist */
>   };
>   
>   #define ELF_HWCAP get_elf_hwcap()
> @@ -836,6 +838,8 @@ static uint32_t get_elf_hwcap2(void)
>                     QEMU_PPC_FEATURE2_VEC_CRYPTO);
>       GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00 |
>                    QEMU_PPC_FEATURE2_DARN | QEMU_PPC_FEATURE2_HAS_IEEE128);
> +    GET_FEATURE2(PPC2_ISA310, QEMU_PPC_FEATURE2_ARCH_3_1 |
> +                 QEMU_PPC_FEATURE2_MMA);
>   
>   #undef GET_FEATURE
>   #undef GET_FEATURE2