Re: [PATCH v2 1/7] powerpc: Add new HWCAP bits
From: Michael Neuling <hidden>
Date: 2020-05-19 03:21:55
On Tue, 2020-05-19 at 10:31 +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 <redacted>
I've test booted this series + powerpc/next (30df74d67d) on top of powervm and OPAL on a P10 simulator. In both cases, it enables MMA and prefix instructions and advertises them via HWCAP2 MMA + ISA 3.1. Hence: Tested-by: Michael Neuling <redacted>
quoted hunk ↗ jump to hunk
--- arch/powerpc/include/uapi/asm/cputable.h | 2 ++ 1 file changed, 2 insertions(+)diff --git a/arch/powerpc/include/uapi/asm/cputable.hb/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 */ /* * IMPORTANT!