linux-kernel - [PATCH 00/15] [v4] x86, fpu: XSAVE cleanups and sanity checks

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Date:	Wed, 02 Sep 2015 16:31:23 -0700
From:	Dave Hansen <dave@...1.net>
To:	dave@...1.net
Cc:	mingo@...hat.com, x86@...nel.org, bp@...en8.de,
	fenghua.yu@...el.com, tim.c.chen@...ux.intel.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 00/15] [v4] x86, fpu: XSAVE cleanups and sanity checks

Changes in v4:
 * Fix up a few compile errors/warnings

Changes in v3:
 * rework XSTATE_* macros using Ingo's suggested naming
 * change state size printk to be in decimal
 * add some more sanity-checking to detect and work around
   an undersized 'xregs_state'
 * remove "nr_" from some of the names used.

Changes in v2:
 * remove references to Processor Trace XSAVE state
   (will defer to another patch set)
 * Remove some cruft from last patch
 * move last_good_offset fix in to the patch that
   introduced it

These patches make some updates to the x86 XSAVE code.

They have been build and boot tested including on hardware
and/or simulators with AVX-512 and MPX.  It boots in all
of the tested configurations without hitting any of the
new warnings in this code.  I even added the Memory
Protecion Keys (the xfeature after MPX) patches on top of
this and everything works fine.

There are basically 5 things going on here:
 * removal of the LWP (lightweight profiling) code
 * naming and type cleanups
 * removal of xfeatures_nr variable
 * addition of AVX-512 C structures
 * new sanity checks of XSAVE buffer sizing

Cc: Ingo Molnar <mingo@...hat.com>
Cc: x86@...nel.org
Cc: Borislav Petkov <bp@...en8.de>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Tim Chen <tim.c.chen@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org
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