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

[Daniel Henrique Barboza]

On 4/27/22 03:42, Joel Stanley wrote:

These are new hwcap bits added for power10.

Signed-off-by: Joel Stanley <j...@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