[PATCH 04/19] <sys/platform/x86.h>: Add BUS_LOCK_DETECT support

[Noah Goldstein]

On Wed, Apr 5, 2023 at 1:20 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote:
>
> On Wed, Apr 5, 2023 at 11:22 AM H.J. Lu via Libc-alpha
> <libc-alpha@sourceware.org> wrote:
> >
> > Add Bus lock debug exceptions (BUS_LOCK_DETECT) support to
> > <sys/platform/x86.h>.
> > ---
> >  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);
> > --
> > 2.39.2
> >
> Rename 'bit_cpu_INDEX_7_ECX_24' in cpu-features.h?

LGTM
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>