[SCM] GNU Mach branch, master, updated. v1.8-221-g4a8995b

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit 4a8995ba22e0862eb8ece1d721870326669719ce
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sat Nov 28 01:31:15 2020 +0100

    x86: Pave the way for xsave/xrstor support
    
    * i386/i386/fpu.h (xgetbv, get_xcr0, xsetbv, set_xcr0): New inline
    functions.
    (xsave, xrstor): New macros.
    * i386/i386/locore.S (cpu_features): Extend to two words.
    (cpu_features_edx, cpu_features_ecx): New labels.
    (discover_x86_cpu_type): Also save ecx cpuid(1) report.
    * x86_64/locore.S: Likewise.
    * i386/i386/locore.h (cpu_features): Extend to two words.
    (CPU_FEATURE_XSAVE): New macro.
    * i386/i386/proc_reg.h (CR4_OSXSAVE): New macro.

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

Summary of changes:
 i386/i386/fpu.h      | 29 +++++++++++++++++++++++++++++
 i386/i386/locore.S   |  6 +++++-
 i386/i386/locore.h   |  3 ++-
 i386/i386/proc_reg.h |  2 ++
 x86_64/locore.S      |  6 +++++-
 5 files changed, 43 insertions(+), 3 deletions(-)


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