powerpc: Add new hwcap values

Message ID 20200615175057.296354-1-tuliom@linux.ibm.com
State New
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Series
  • powerpc: Add new hwcap values
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Commit Message

Adhemerval Zanella via Libc-alpha June 15, 2020, 5:50 p.m.
Linux commit ID ee988c11acf6f9464b7b44e9a091bf6afb3b3a49 reserved 2 new
bits in AT_HWCAP2:
 - PPC_FEATURE2_ARCH_3_1 indicates the availability of the POWER ISA
   3.1;
 - PPC_FEATURE2_MMA indicates the availability of the Matrix-Multiply
   Assist facility.
---
 sysdeps/powerpc/bits/hwcap.h  | 2 ++
 sysdeps/powerpc/dl-procinfo.c | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

-- 
2.25.4

Comments

Adhemerval Zanella via Libc-alpha June 15, 2020, 6:26 p.m. | #1
* Tulio Magno Quites Machado Filho via Libc-alpha:

> Linux commit ID ee988c11acf6f9464b7b44e9a091bf6afb3b3a49 reserved 2 new

> bits in AT_HWCAP2:

>  - PPC_FEATURE2_ARCH_3_1 indicates the availability of the POWER ISA

>    3.1;

>  - PPC_FEATURE2_MMA indicates the availability of the Matrix-Multiply

>    Assist facility.

> ---

>  sysdeps/powerpc/bits/hwcap.h  | 2 ++

>  sysdeps/powerpc/dl-procinfo.c | 2 +-

>  2 files changed, 3 insertions(+), 1 deletion(-)

>

> diff --git a/sysdeps/powerpc/bits/hwcap.h b/sysdeps/powerpc/bits/hwcap.h

> index 4a5a7bcded..e8f3fdea92 100644

> --- a/sysdeps/powerpc/bits/hwcap.h

> +++ b/sysdeps/powerpc/bits/hwcap.h

> @@ -74,3 +74,5 @@

>  #define PPC_FEATURE2_SCV	   0x00100000 /* scv syscall.  */

>  #define PPC_FEATURE2_HTM_NO_SUSPEND  0x00080000 /* TM without suspended

>  						   state.  */

> +#define PPC_FEATURE2_ARCH_3_1	   0x00040000 /* ISA 3.1.  */

> +#define PPC_FEATURE2_MMA	   0x00020000 /* Matrix-Multiply Assist.  */

> diff --git a/sysdeps/powerpc/dl-procinfo.c b/sysdeps/powerpc/dl-procinfo.c

> index 7a7d93dd0a..8dc07728f0 100644

> --- a/sysdeps/powerpc/dl-procinfo.c

> +++ b/sysdeps/powerpc/dl-procinfo.c

> @@ -77,7 +77,7 @@ PROCINFO_CLASS const char _dl_powerpc_cap_flags[64][15]

>      "", "", "", "",

>      "", "", "", "",

>      "", "", "", "",

> -    "", "", "", "htm-no-suspend",

> +    "", "mma", "arch_3_1", "htm-no-suspend",

>      "scv", "darn", "ieee128", "arch_3_00",

>      "htm-nosc", "vcrypto", "tar", "isel",

>      "ebb", "dscr", "htm", "arch_2_07",


Change looks good to me.

Do we want to update HWCAP_IMPORTANT at this point?  I don't think so.
It's already not very helpful on powerpc64le at least.

Thanks,
Florian
Adhemerval Zanella via Libc-alpha June 16, 2020, 1:23 p.m. | #2
Florian Weimer via Libc-alpha <libc-alpha@sourceware.org> writes:

> Do we want to update HWCAP_IMPORTANT at this point?  I don't think so.

> It's already not very helpful on powerpc64le at least.


I agree.

-- 
Tulio Magno
Adhemerval Zanella via Libc-alpha June 23, 2020, 9:41 p.m. | #3
Tulio Magno Quites Machado Filho via Libc-alpha <libc-alpha@sourceware.org> writes:

> Florian Weimer via Libc-alpha <libc-alpha@sourceware.org> writes:

>

>> Do we want to update HWCAP_IMPORTANT at this point?  I don't think so.

>> It's already not very helpful on powerpc64le at least.

>

> I agree.


Pushed as ae725e3f9cb4e1eb825ebe1d55241c98c2ea32f1.

Thanks!

-- 
Tulio Magno

Patch

diff --git a/sysdeps/powerpc/bits/hwcap.h b/sysdeps/powerpc/bits/hwcap.h
index 4a5a7bcded..e8f3fdea92 100644
--- a/sysdeps/powerpc/bits/hwcap.h
+++ b/sysdeps/powerpc/bits/hwcap.h
@@ -74,3 +74,5 @@ 
 #define PPC_FEATURE2_SCV	   0x00100000 /* scv syscall.  */
 #define PPC_FEATURE2_HTM_NO_SUSPEND  0x00080000 /* TM without suspended
 						   state.  */
+#define PPC_FEATURE2_ARCH_3_1	   0x00040000 /* ISA 3.1.  */
+#define PPC_FEATURE2_MMA	   0x00020000 /* Matrix-Multiply Assist.  */
diff --git a/sysdeps/powerpc/dl-procinfo.c b/sysdeps/powerpc/dl-procinfo.c
index 7a7d93dd0a..8dc07728f0 100644
--- a/sysdeps/powerpc/dl-procinfo.c
+++ b/sysdeps/powerpc/dl-procinfo.c
@@ -77,7 +77,7 @@  PROCINFO_CLASS const char _dl_powerpc_cap_flags[64][15]
     "", "", "", "",
     "", "", "", "",
     "", "", "", "",
-    "", "", "", "htm-no-suspend",
+    "", "mma", "arch_3_1", "htm-no-suspend",
     "scv", "darn", "ieee128", "arch_3_00",
     "htm-nosc", "vcrypto", "tar", "isel",
     "ebb", "dscr", "htm", "arch_2_07",