Commit 060dd0f7 authored by Dave Hansen's avatar Dave Hansen Committed by Ingo Molnar

x86/fpu: Add C structures for AVX-512 state components

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: default avatarDave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: dave@sr71.net
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20150902233129.F2433B98@viggo.jf.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 83aa3c45
...@@ -131,6 +131,12 @@ enum xfeature { ...@@ -131,6 +131,12 @@ enum xfeature {
struct reg_128_bit { struct reg_128_bit {
u8 regbytes[128/8]; u8 regbytes[128/8];
}; };
struct reg_256_bit {
u8 regbytes[256/8];
};
struct reg_512_bit {
u8 regbytes[512/8];
};
/* /*
* State component 2: * State component 2:
...@@ -179,6 +185,33 @@ struct mpx_bndcsr_state { ...@@ -179,6 +185,33 @@ struct mpx_bndcsr_state {
}; };
} __packed; } __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 { struct xstate_header {
u64 xfeatures; u64 xfeatures;
u64 xcomp_bv; u64 xcomp_bv;
......
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