1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_X86_XSAVE_H 3 #define __ASM_X86_XSAVE_H 4 5 #include <linux/uaccess.h> 6 #include <linux/types.h> 7 8 #include <asm/processor.h> 9 #include <asm/user.h> 10 11 /* Bit 63 of XCR0 is reserved for future expansion */ 12 #define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63))) 13 14 #define XSTATE_CPUID 0x0000000d 15 16 #define FXSAVE_SIZE 512 17 18 #define XSAVE_HDR_SIZE 64 19 #define XSAVE_HDR_OFFSET FXSAVE_SIZE 20 21 #define XSAVE_YMM_SIZE 256 22 #define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET) 23 24 /* Supervisor features */ 25 #define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT) 26 27 /* All currently supported features */ 28 #define XCNTXT_MASK (XFEATURE_MASK_FP | \ 29 XFEATURE_MASK_SSE | \ 30 XFEATURE_MASK_YMM | \ 31 XFEATURE_MASK_OPMASK | \ 32 XFEATURE_MASK_ZMM_Hi256 | \ 33 XFEATURE_MASK_Hi16_ZMM | \ 34 XFEATURE_MASK_PKRU | \ 35 XFEATURE_MASK_BNDREGS | \ 36 XFEATURE_MASK_BNDCSR) 37 38 #ifdef CONFIG_X86_64 39 #define REX_PREFIX "0x48, " 40 #else 41 #define REX_PREFIX 42 #endif 43 44 extern u64 xfeatures_mask; 45 extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS]; 46 47 extern void __init update_regset_xstate_info(unsigned int size, 48 u64 xstate_mask); 49 50 void fpu__xstate_clear_all_cpu_caps(void); 51 void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr); 52 const void *get_xsave_field_ptr(int xfeature_nr); 53 int using_compacted_format(void); 54 int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 55 int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 56 int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf); 57 int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf); 58 59 /* Validate an xstate header supplied by userspace (ptrace or sigreturn) */ 60 extern int validate_xstate_header(const struct xstate_header *hdr); 61 62 #endif 63