1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_X86_XSAVE_H
3 #define __ASM_X86_XSAVE_H
5 #include <linux/uaccess.h>
6 #include <linux/types.h>
8 #include <asm/processor.h>
11 /* Bit 63 of XCR0 is reserved for future expansion */
12 #define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63)))
14 #define XSTATE_CPUID 0x0000000d
16 #define FXSAVE_SIZE 512
18 #define XSAVE_HDR_SIZE 64
19 #define XSAVE_HDR_OFFSET FXSAVE_SIZE
21 #define XSAVE_YMM_SIZE 256
22 #define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
24 /* All currently supported user features */
25 #define XFEATURE_MASK_USER_SUPPORTED (XFEATURE_MASK_FP | \
28 XFEATURE_MASK_OPMASK | \
29 XFEATURE_MASK_ZMM_Hi256 | \
30 XFEATURE_MASK_Hi16_ZMM | \
31 XFEATURE_MASK_PKRU | \
32 XFEATURE_MASK_BNDREGS | \
35 /* All currently supported supervisor features */
36 #define XFEATURE_MASK_SUPERVISOR_SUPPORTED (0)
39 * Unsupported supervisor features. When a supervisor feature in this mask is
40 * supported in the future, move it to the supported supervisor feature mask.
42 #define XFEATURE_MASK_SUPERVISOR_UNSUPPORTED (XFEATURE_MASK_PT)
44 /* All supervisor states including supported and unsupported states. */
45 #define XFEATURE_MASK_SUPERVISOR_ALL (XFEATURE_MASK_SUPERVISOR_SUPPORTED | \
46 XFEATURE_MASK_SUPERVISOR_UNSUPPORTED)
49 #define REX_PREFIX "0x48, "
54 extern u64 xfeatures_mask_all;
56 static inline u64 xfeatures_mask_supervisor(void)
58 return xfeatures_mask_all & XFEATURE_MASK_SUPERVISOR_SUPPORTED;
61 static inline u64 xfeatures_mask_user(void)
63 return xfeatures_mask_all & XFEATURE_MASK_USER_SUPPORTED;
66 extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS];
68 extern void __init update_regset_xstate_info(unsigned int size,
71 void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr);
72 const void *get_xsave_field_ptr(int xfeature_nr);
73 int using_compacted_format(void);
74 int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size);
75 int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size);
76 int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf);
77 int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf);
78 void copy_supervisor_to_kernel(struct xregs_state *xsave);
80 /* Validate an xstate header supplied by userspace (ptrace or sigreturn) */
81 int validate_user_xstate_header(const struct xstate_header *hdr);