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 61