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 /* All currently supported features */
  25 #define XCNTXT_MASK             (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                                  XFEATURE_MASK_PKRU | \
  32                                  XFEATURE_MASK_BNDREGS | \
  33                                  XFEATURE_MASK_BNDCSR)
  34
  35 #ifdef CONFIG_X86_64
  36 #define REX_PREFIX      "0x48, "
  37 #else
  38 #define REX_PREFIX
  39 #endif
  40
  41 extern u64 xfeatures_mask;
  42 extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS];
  43
  44 extern void __init update_regset_xstate_info(unsigned int size,
  45                                              u64 xstate_mask);
  46
  47 void fpu__xstate_clear_all_cpu_caps(void);
  48 void *get_xsave_addr(struct xregs_state *xsave, int xstate);
  49 const void *get_xsave_field_ptr(int xstate_field);
  50 int using_compacted_format(void);
  51 int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int pos, unsigned int count);
  52 int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int pos, unsigned int count);
  53 int copy_user_to_xstate(const void *kbuf, const void __user *ubuf,
  54                      struct xregs_state *xsave);
  55 #endif