[Bug libc/23459] COMMON_CPUID_INDEX_80000001 isn't populated for Intel processors

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https://sourceware.org/bugzilla/show_bug.cgi?id=23459

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2dab17550dd464bcf531088efa81a9d595167f2a

commit 2dab17550dd464bcf531088efa81a9d595167f2a
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Jul 29 06:08:59 2018 -0700

    x86: Populate COMMON_CPUID_INDEX_80000001 for Intel CPUs [BZ #23459]

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

        [BZ #23459]
        * sysdeps/x86/cpu-features.c (get_extended_indices): New
        function.
        (init_cpu_features): Call get_extended_indices for both Intel
        and AMD CPUs.
        * sysdeps/x86/cpu-features.h (COMMON_CPUID_INDEX_80000001):
        Remove "for AMD" comment.

    (cherry picked from commit be525a69a6630abc83144c0a96474f2e26da7443)

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a452341529ef0a952b576e20d3c7e3c48dcb8427

commit a452341529ef0a952b576e20d3c7e3c48dcb8427
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Jul 29 06:08:59 2018 -0700

    x86: Correct index_cpu_LZCNT [BZ #23456]

    cpu-features.h has

     #define bit_cpu_LZCNT              (1 << 5)
     #define index_cpu_LZCNT    COMMON_CPUID_INDEX_1
     #define reg_LZCNT

    But the LZCNT feature bit is in COMMON_CPUID_INDEX_80000001:

    Initial EAX Value: 80000001H
    ECX Extended Processor Signature and Feature Bits:
    Bit 05: LZCNT available

    index_cpu_LZCNT should be COMMON_CPUID_INDEX_80000001, not
    COMMON_CPUID_INDEX_1.  The VMX feature bit is in COMMON_CPUID_INDEX_1:

    Initial EAX Value: 01H
    Feature Information Returned in the ECX Register:
    5 VMX

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

        [BZ #23456]
        * sysdeps/x86/cpu-features.h (index_cpu_LZCNT): Set to
        COMMON_CPUID_INDEX_80000001.

    (cherry picked from commit 65d87ade1ee6f3ac099105e3511bd09bdc24cf3f)

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                  |   16 ++++++++++++++++
 NEWS                       |    2 ++
 sysdeps/x86/cpu-features.c |   27 ++++++++++++++++++---------
 sysdeps/x86/cpu-features.h |    4 ++--
 4 files changed, 38 insertions(+), 11 deletions(-)

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