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[PATCH 12/15] x86, fpu: add C structures for AVX-512 state components

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From: Dave Hansen <dave.hansen@linux.intel.com>

AVX-512 has 3 separate state components:
1. opmask registers
2. zmm upper half of registers 0-15
3. new zmm registers (16-31)

This patch adds C structures for the three components along with
a few comments mostly lifted from the SDM to explain what they
do.  This will allow us to check our structures against what the
hardware tells us about the sizes of the components.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: x86@kernel.org
Cc: Borislav Petkov <bp@alien8.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: linux-kernel@vger.kernel.org
---

 b/arch/x86/include/asm/fpu/types.h |   33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff -puN arch/x86/include/asm/fpu/types.h~avx-512-structs arch/x86/include/asm/fpu/types.h
--- a/arch/x86/include/asm/fpu/types.h~avx-512-structs	2015-08-31 15:17:36.334970980 -0700
+++ b/arch/x86/include/asm/fpu/types.h	2015-08-31 15:17:36.337971117 -0700
@@ -131,6 +131,12 @@ enum xfeature {
 struct reg_128_bit {
 	u8      regbytes[128/8];
 };
+struct reg_256_bit {
+	u8	regbytes[256/8];
+};
+struct reg_512_bit {
+	u8	regbytes[512/8];
+};
 
 /*
  * State component 2:
@@ -179,6 +185,33 @@ struct mpx_bndcsr_state {
 	};
 } __packed;
 
+/* AVX-512 Components: */
+
+/*
+ * State component 5 is used for the 8 64-bit opmask registers
+ * k0-k7 (opmask state).
+ */
+struct avx_512_opmask_state {
+	u64 				opmask_reg[8];
+} __packed;
+
+/*
+ * State component 6 is used for the upper 256 bits of the
+ * registers ZMM0-ZMM15. These 16 256-bit values are denoted
+ * ZMM0_H-ZMM15_H (ZMM_Hi256 state).
+ */
+struct avx_512_zmm_uppers_state {
+	struct reg_256_bit		zmm_upper[16];
+} __packed;
+
+/*
+ * State component 7 is used for the 16 512-bit registers
+ * ZMM16-ZMM31 (Hi16_ZMM state).
+ */
+struct avx_512_hi16_state {
+	struct reg_512_bit		hi16_zmm[16];
+} __packed;
+
 struct xstate_header {
 	u64				xfeatures;
 	u64				xcomp_bv;
_
--
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Thread

[PATCH 00/15] [v3] x86, fpu: XSAVE cleanups and sanity checks Dave Hansen <dave@sr71.net> - 2015-09-01 00:30 +0200
  [PATCH 10/15] x86, fpu: rework MPX 'xstate' types Dave Hansen <dave@sr71.net> - 2015-09-01 00:30 +0200
  [PATCH 15/15] x86, fpu: check CPU-provided sizes against struct declarations Dave Hansen <dave@sr71.net> - 2015-09-01 00:30 +0200
  [PATCH 02/15] x86, fpu: move XSAVE-disabling code to a helper Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 13/15] x86, fpu: correct and check XSAVE xstate size calculations Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 05/15] x86, fpu: XSAVE macro renames Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
    Re: [PATCH 05/15] x86, fpu: XSAVE macro renames Dave Hansen <dave@sr71.net> - 2015-09-01 01:50 +0200
  [PATCH 11/15] x86, fpu: rework YMM definition Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 06/15] x86, fpu: rename XFEATURES_NR_MAX Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 04/15] x86, fpu: kill LWP support Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 09/15] x86, fpu: add helper xfeature_enabled() instead of test_bit() Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 07/15] x86, fpu: rework XSTATE_* macros to remove magic '2' Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 12/15] x86, fpu: add C structures for AVX-512 state components Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 03/15] x86, fpu: remove XSTATE_RESERVE Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200
  [PATCH 08/15] x86, fpu: remove xfeature_nr Dave Hansen <dave@sr71.net> - 2015-09-01 00:40 +0200

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