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

   1 #ifndef __ASM_X86_XSAVE_H
   2 #define __ASM_X86_XSAVE_H
   3
   4 #include <linux/types.h>
   5 #include <asm/processor.h>
   6 #include <linux/uaccess.h>
   7
   8 /* Bit 63 of XCR0 is reserved for future expansion */
   9 #define XFEATURE_MASK_EXTEND    (~(XFEATURE_MASK_FPSSE | (1ULL << 63)))
  10
  11 #define XSTATE_CPUID            0x0000000d
  12
  13 #define FXSAVE_SIZE     512
  14
  15 #define XSAVE_HDR_SIZE      64
  16 #define XSAVE_HDR_OFFSET    FXSAVE_SIZE
  17
  18 #define XSAVE_YMM_SIZE      256
  19 #define XSAVE_YMM_OFFSET    (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
  20
  21 /* Supervisor features */
  22 #define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT)
  23
  24 /* Supported features which support lazy state saving */
  25 #define XFEATURE_MASK_LAZY      (XFEATURE_MASK_FP | \
  26                                  XFEATURE_MASK_SSE | \
  27                                  XFEATURE_MASK_YMM | \
  28                                  XFEATURE_MASK_OPMASK | \
  29                                  XFEATURE_MASK_ZMM_Hi256 | \
  30                                  XFEATURE_MASK_Hi16_ZMM)
  31
  32 /* Supported features which require eager state saving */
  33 #define XFEATURE_MASK_EAGER     (XFEATURE_MASK_BNDREGS | \
  34                                  XFEATURE_MASK_BNDCSR | \
  35                                  XFEATURE_MASK_PKRU)
  36
  37 /* All currently supported features */
  38 #define XCNTXT_MASK     (XFEATURE_MASK_LAZY | XFEATURE_MASK_EAGER)
  39
  40 #ifdef CONFIG_X86_64
  41 #define REX_PREFIX      "0x48, "
  42 #else
  43 #define REX_PREFIX
  44 #endif
  45
  46 extern u64 xfeatures_mask;
  47 extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS];
  48
  49 extern void __init update_regset_xstate_info(unsigned int size,
  50                                              u64 xstate_mask);
  51
  52 void fpu__xstate_clear_all_cpu_caps(void);
  53 void *get_xsave_addr(struct xregs_state *xsave, int xstate);
  54 const void *get_xsave_field_ptr(int xstate_field);
  55 int using_compacted_format(void);
  56 int copyout_from_xsaves(unsigned int pos, unsigned int count, void *kbuf,
  57                         void __user *ubuf, struct xregs_state *xsave);
  58 int copyin_to_xsaves(const void *kbuf, const void __user *ubuf,
  59                      struct xregs_state *xsave);
  60 #endif