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

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

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=09cc5fee2165c7be14907e6597373b0cd35803f3

commit 09cc5fee2165c7be14907e6597373b0cd35803f3
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Apr 5 09:21:29 2023 -0700

    <sys/platform/x86.h>: Add BUS_LOCK_DETECT support
    
    Add Bus lock debug exceptions (BUS_LOCK_DETECT) support to
    <sys/platform/x86.h>.
    Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>

Diff:
---
 manual/platform.texi               | 3 +++
 sysdeps/x86/bits/platform/x86.h    | 2 +-
 sysdeps/x86/tst-get-cpu-features.c | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/manual/platform.texi b/manual/platform.texi
index 9251b63e47..78ee39f650 100644
--- a/manual/platform.texi
+++ b/manual/platform.texi
@@ -276,6 +276,9 @@ extensions.
 @item
 @code{BMI2} -- BMI2 instructions.
 
+@item
+@code{BUS_LOCK_DETECT} -- Bus lock debug exceptions.
+
 @item
 @code{CLDEMOTE} -- CLDEMOTE instruction.
 
diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h
index c9189fa248..e25f1ac53c 100644
--- a/sysdeps/x86/bits/platform/x86.h
+++ b/sysdeps/x86/bits/platform/x86.h
@@ -187,7 +187,7 @@ enum
    instructions in 64-bit mode.  */
   x86_cpu_RDPID			= x86_cpu_index_7_ecx + 22,
   x86_cpu_KL			= x86_cpu_index_7_ecx + 23,
-  x86_cpu_INDEX_7_ECX_24	= x86_cpu_index_7_ecx + 24,
+  x86_cpu_BUS_LOCK_DETECT	= x86_cpu_index_7_ecx + 24,
   x86_cpu_CLDEMOTE		= x86_cpu_index_7_ecx + 25,
   x86_cpu_INDEX_7_ECX_26	= x86_cpu_index_7_ecx + 26,
   x86_cpu_MOVDIRI		= x86_cpu_index_7_ecx + 27,
diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c
index 5f5cd3e448..dcb735ddd6 100644
--- a/sysdeps/x86/tst-get-cpu-features.c
+++ b/sysdeps/x86/tst-get-cpu-features.c
@@ -147,6 +147,7 @@ do_test (void)
   CHECK_CPU_FEATURE_PRESENT (LA57);
   CHECK_CPU_FEATURE_PRESENT (RDPID);
   CHECK_CPU_FEATURE_PRESENT (KL);
+  CHECK_CPU_FEATURE_PRESENT (BUS_LOCK_DETECT);
   CHECK_CPU_FEATURE_PRESENT (CLDEMOTE);
   CHECK_CPU_FEATURE_PRESENT (MOVDIRI);
   CHECK_CPU_FEATURE_PRESENT (MOVDIR64B);