1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_X86_XSAVE_H 3 #define __ASM_X86_XSAVE_H 4 5 #include <linux/types.h> 6 #include <asm/processor.h> 7 #include <linux/uaccess.h> 8 9 /* Bit 63 of XCR0 is reserved for future expansion */ 10 #define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63))) 11 12 #define XSTATE_CPUID 0x0000000d 13 14 #define FXSAVE_SIZE 512 15 16 #define XSAVE_HDR_SIZE 64 17 #define XSAVE_HDR_OFFSET FXSAVE_SIZE 18 19 #define XSAVE_YMM_SIZE 256 20 #define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET) 21 22 /* Supervisor features */ 23 #define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT) 24 25 /* All currently supported features */ 26 #define XCNTXT_MASK (XFEATURE_MASK_FP | \ 27 XFEATURE_MASK_SSE | \ 28 XFEATURE_MASK_YMM | \ 29 XFEATURE_MASK_OPMASK | \ 30 XFEATURE_MASK_ZMM_Hi256 | \ 31 XFEATURE_MASK_Hi16_ZMM | \ 32 XFEATURE_MASK_PKRU | \ 33 XFEATURE_MASK_BNDREGS | \ 34 XFEATURE_MASK_BNDCSR) 35 36 #ifdef CONFIG_X86_64 37 #define REX_PREFIX "0x48, " 38 #else 39 #define REX_PREFIX 40 #endif 41 42 extern u64 xfeatures_mask; 43 extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS]; 44 45 extern void __init update_regset_xstate_info(unsigned int size, 46 u64 xstate_mask); 47 48 void fpu__xstate_clear_all_cpu_caps(void); 49 void *get_xsave_addr(struct xregs_state *xsave, int xstate); 50 const void *get_xsave_field_ptr(int xstate_field); 51 int using_compacted_format(void); 52 int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 53 int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 54 int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf); 55 int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf); 56 57 /* Validate an xstate header supplied by userspace (ptrace or sigreturn) */ 58 extern int validate_xstate_header(const struct xstate_header *hdr); 59 60 #endif 61