1669ebabbSIngo Molnar #ifndef __ASM_X86_XSAVE_H 2669ebabbSIngo Molnar #define __ASM_X86_XSAVE_H 3669ebabbSIngo Molnar 4669ebabbSIngo Molnar #include <linux/types.h> 5669ebabbSIngo Molnar #include <asm/processor.h> 659a36d16SIngo Molnar #include <linux/uaccess.h> 7669ebabbSIngo Molnar 8669ebabbSIngo Molnar /* Bit 63 of XCR0 is reserved for future expansion */ 9d91cab78SDave Hansen #define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63))) 10669ebabbSIngo Molnar 11677b98bdSIngo Molnar #define XSTATE_CPUID 0x0000000d 12677b98bdSIngo Molnar 13669ebabbSIngo Molnar #define FXSAVE_SIZE 512 14669ebabbSIngo Molnar 15669ebabbSIngo Molnar #define XSAVE_HDR_SIZE 64 16669ebabbSIngo Molnar #define XSAVE_HDR_OFFSET FXSAVE_SIZE 17669ebabbSIngo Molnar 18669ebabbSIngo Molnar #define XSAVE_YMM_SIZE 256 19669ebabbSIngo Molnar #define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET) 20669ebabbSIngo Molnar 211499ce2dSYu-cheng Yu /* Supervisor features */ 221499ce2dSYu-cheng Yu #define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT) 231499ce2dSYu-cheng Yu 24669ebabbSIngo Molnar /* Supported features which support lazy state saving */ 25d91cab78SDave Hansen #define XFEATURE_MASK_LAZY (XFEATURE_MASK_FP | \ 26a65050c6SYu-cheng Yu XFEATURE_MASK_SSE | \ 27d91cab78SDave Hansen XFEATURE_MASK_YMM | \ 28d91cab78SDave Hansen XFEATURE_MASK_OPMASK | \ 29d91cab78SDave Hansen XFEATURE_MASK_ZMM_Hi256 | \ 30c8df4009SDave Hansen XFEATURE_MASK_Hi16_ZMM | \ 31c8df4009SDave Hansen XFEATURE_MASK_PKRU) 32669ebabbSIngo Molnar 33a65050c6SYu-cheng Yu /* Supported features which require eager state saving */ 34a65050c6SYu-cheng Yu #define XFEATURE_MASK_EAGER (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR) 35a65050c6SYu-cheng Yu 36669ebabbSIngo Molnar /* All currently supported features */ 37d91cab78SDave Hansen #define XCNTXT_MASK (XFEATURE_MASK_LAZY | XFEATURE_MASK_EAGER) 38669ebabbSIngo Molnar 39669ebabbSIngo Molnar #ifdef CONFIG_X86_64 40669ebabbSIngo Molnar #define REX_PREFIX "0x48, " 41669ebabbSIngo Molnar #else 42669ebabbSIngo Molnar #define REX_PREFIX 43669ebabbSIngo Molnar #endif 44669ebabbSIngo Molnar 45669ebabbSIngo Molnar extern u64 xfeatures_mask; 46669ebabbSIngo Molnar extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS]; 47669ebabbSIngo Molnar 48*404f6aacSKees Cook extern void __init update_regset_xstate_info(unsigned int size, 49*404f6aacSKees Cook u64 xstate_mask); 50669ebabbSIngo Molnar 510a265375SDave Hansen void fpu__xstate_clear_all_cpu_caps(void); 52c47ada30SIngo Molnar void *get_xsave_addr(struct xregs_state *xsave, int xstate); 5304cd027bSDave Hansen const void *get_xsave_field_ptr(int xstate_field); 5499aa22d0SYu-cheng Yu int using_compacted_format(void); 5591c3dba7SYu-cheng Yu int copyout_from_xsaves(unsigned int pos, unsigned int count, void *kbuf, 5691c3dba7SYu-cheng Yu void __user *ubuf, struct xregs_state *xsave); 5791c3dba7SYu-cheng Yu int copyin_to_xsaves(const void *kbuf, const void __user *ubuf, 5891c3dba7SYu-cheng Yu struct xregs_state *xsave); 59669ebabbSIngo Molnar #endif 60