1 #ifndef __ASM_X86_XSAVE_H
2 #define __ASM_X86_XSAVE_H
4 #include <linux/types.h>
5 #include <asm/processor.h>
6 #include <linux/uaccess.h>
8 /* Bit 63 of XCR0 is reserved for future expansion */
9 #define XSTATE_EXTEND_MASK (~(XSTATE_FPSSE | (1ULL << 63)))
11 #define XSTATE_CPUID 0x0000000d
13 #define FXSAVE_SIZE 512
15 #define XSAVE_HDR_SIZE 64
16 #define XSAVE_HDR_OFFSET FXSAVE_SIZE
18 #define XSAVE_YMM_SIZE 256
19 #define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
21 /* Supported features which support lazy state saving */
22 #define XSTATE_LAZY (XSTATE_FP | XSTATE_SSE | XSTATE_YMM \
23 | XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM)
25 /* Supported features which require eager state saving */
26 #define XSTATE_EAGER (XSTATE_BNDREGS | XSTATE_BNDCSR)
28 /* All currently supported features */
29 #define XCNTXT_MASK (XSTATE_LAZY | XSTATE_EAGER)
32 #define REX_PREFIX "0x48, "
37 extern unsigned int xstate_size;
38 extern u64 xfeatures_mask;
39 extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS];
41 extern void update_regset_xstate_info(unsigned int size, u64 xstate_mask);
43 void *get_xsave_addr(struct xregs_state *xsave, int xstate);
44 const void *get_xsave_field_ptr(int xstate_field);