[PATCH] <sys/platform/x86.h>: Add Intel LAM support

[H.J. Lu]

On Tue, Dec 22, 2020 at 1:05 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * H. J. Lu via Libc-alpha:
>
> > Add Intel Linear Address Masking (LAM) support to <sys/platform/x86.h>.
> > ---
> >  manual/platform.texi               | 3 +++
> >  sysdeps/x86/sys/platform/x86.h     | 3 +++
> >  sysdeps/x86/tst-get-cpu-features.c | 1 +
> >  3 files changed, 7 insertions(+)
>
> Looks okay to me.
>

I checked it with the updated commit message:

Add Intel Linear Address Masking (LAM) support to <sys/platform/x86.h>.
HAS_CPU_FEATURE (LAM) can be used to detect if LAM is enabled in CPU.

LAM modifies the checking that is applied to 64-bit linear addresses,
allowing software to use of the untranslated address bits for metadata.

-- 
H.J.