linux-kernel - RE: [PATCH v2 1/1] Documentation/x86: Add the AMX enabling example

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Date:   Wed, 29 Jun 2022 23:30:16 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     "Bae, Chang Seok" <chang.seok.bae@...el.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "Brown, Len" <len.brown@...el.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "Chatre, Reinette" <reinette.chatre@...el.com>,
        "Williams, Dan J" <dan.j.williams@...el.com>
CC:     "corbet@....net" <corbet@....net>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-man@...r.kernel.org" <linux-man@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/1] Documentation/x86: Add the AMX enabling example

+        #define ARCH_GET_XCOMP_SUPP  0x1021
+
+        #define XFEATURE_XTILECFG    17
+        #define XFEATURE_XTILEDATA   18

What's the long-term plan for these #defines?  I see that ARCH_GET_XCOMP_SUPP
is in arch/x86/include/uapi/asm/prctl.h ... so eventually that will show up in distribution
/usr/include/asm/prctl.h courtesy of a glibc update.

But the XFEATURE bits aren't in a "uapi" file. They are an "enum" in:

arch/x86/include/asm/fpu/types.h

How will that get to /usr/include?

-Tony