[glibc] <sys/platform/x86.h>: Add ArchPerfmonExt support

[glibc] <sys/platform/x86.h>: Add ArchPerfmonExt support

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a00db8305db02231cea6e3806d86526d209a580c

commit a00db8305db02231cea6e3806d86526d209a580c
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Apr 5 09:21:36 2023 -0700

    <sys/platform/x86.h>: Add ArchPerfmonExt support
    
    Add Architectural Performance Monitoring Extended Leaf (EAX = 23H)
    support to <sys/platform/x86.h>.
    Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>

Diff:
---
 manual/platform.texi               | 4 ++++
 sysdeps/x86/bits/platform/x86.h    | 1 +
 sysdeps/x86/tst-get-cpu-features.c | 1 +
 3 files changed, 6 insertions(+)

diff --git a/manual/platform.texi b/manual/platform.texi
index e4d2c00886..ecee3a7b39 100644
--- a/manual/platform.texi
+++ b/manual/platform.texi
@@ -206,6 +206,10 @@ The supported processor features are:
 @item
 @code{ARCH_CAPABILITIES} -- IA32_ARCH_CAPABILITIES MSR.
 
+@item
+@code{ArchPerfmonExt} -- Architectural Performance Monitoring Extended
+Leaf (EAX = 23H).
+
 @item
 @code{AVX} -- The AVX instruction extensions.
 
diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h
index 0187964aba..74b7f951e1 100644
--- a/sysdeps/x86/bits/platform/x86.h
+++ b/sysdeps/x86/bits/platform/x86.h
@@ -293,6 +293,7 @@ enum
   x86_cpu_AVX512_BF16		= x86_cpu_index_7_ecx_1_eax + 5,
   x86_cpu_LASS			= x86_cpu_index_7_ecx_1_eax + 6,
   x86_cpu_CMPCCXADD		= x86_cpu_index_7_ecx_1_eax + 7,
+  x86_cpu_ArchPerfmonExt	= x86_cpu_index_7_ecx_1_eax + 8,
   x86_cpu_FZLRM			= x86_cpu_index_7_ecx_1_eax + 10,
   x86_cpu_FSRS			= x86_cpu_index_7_ecx_1_eax + 11,
   x86_cpu_FSRCS			= x86_cpu_index_7_ecx_1_eax + 12,
diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c
index d8bc92560f..329d4aafb4 100644
--- a/sysdeps/x86/tst-get-cpu-features.c
+++ b/sysdeps/x86/tst-get-cpu-features.c
@@ -205,6 +205,7 @@ do_test (void)
   CHECK_CPU_FEATURE_PRESENT (AVX512_BF16);
   CHECK_CPU_FEATURE_PRESENT (LASS);
   CHECK_CPU_FEATURE_PRESENT (CMPCCXADD);
+  CHECK_CPU_FEATURE_PRESENT (ArchPerfmonExt);
   CHECK_CPU_FEATURE_PRESENT (FZLRM);
   CHECK_CPU_FEATURE_PRESENT (FSRS);
   CHECK_CPU_FEATURE_PRESENT (FSRCS);