1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2669ebabbSIngo Molnar #ifndef __ASM_X86_XSAVE_H 3669ebabbSIngo Molnar #define __ASM_X86_XSAVE_H 4669ebabbSIngo Molnar 559a36d16SIngo Molnar #include <linux/uaccess.h> 6*0cecca9dSRik van Riel #include <linux/types.h> 7*0cecca9dSRik van Riel 8*0cecca9dSRik van Riel #include <asm/processor.h> 9*0cecca9dSRik van Riel #include <asm/user.h> 10669ebabbSIngo Molnar 11669ebabbSIngo Molnar /* Bit 63 of XCR0 is reserved for future expansion */ 12d91cab78SDave Hansen #define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63))) 13669ebabbSIngo Molnar 14677b98bdSIngo Molnar #define XSTATE_CPUID 0x0000000d 15677b98bdSIngo Molnar 16669ebabbSIngo Molnar #define FXSAVE_SIZE 512 17669ebabbSIngo Molnar 18669ebabbSIngo Molnar #define XSAVE_HDR_SIZE 64 19669ebabbSIngo Molnar #define XSAVE_HDR_OFFSET FXSAVE_SIZE 20669ebabbSIngo Molnar 21669ebabbSIngo Molnar #define XSAVE_YMM_SIZE 256 22669ebabbSIngo Molnar #define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET) 23669ebabbSIngo Molnar 241499ce2dSYu-cheng Yu /* Supervisor features */ 251499ce2dSYu-cheng Yu #define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT) 261499ce2dSYu-cheng Yu 272f7fada2SAndy Lutomirski /* All currently supported features */ 282f7fada2SAndy Lutomirski #define XCNTXT_MASK (XFEATURE_MASK_FP | \ 29a65050c6SYu-cheng Yu XFEATURE_MASK_SSE | \ 30d91cab78SDave Hansen XFEATURE_MASK_YMM | \ 31d91cab78SDave Hansen XFEATURE_MASK_OPMASK | \ 32d91cab78SDave Hansen XFEATURE_MASK_ZMM_Hi256 | \ 33c8df4009SDave Hansen XFEATURE_MASK_Hi16_ZMM | \ 342f7fada2SAndy Lutomirski XFEATURE_MASK_PKRU | \ 352f7fada2SAndy Lutomirski XFEATURE_MASK_BNDREGS | \ 362f7fada2SAndy Lutomirski XFEATURE_MASK_BNDCSR) 37669ebabbSIngo Molnar 38669ebabbSIngo Molnar #ifdef CONFIG_X86_64 39669ebabbSIngo Molnar #define REX_PREFIX "0x48, " 40669ebabbSIngo Molnar #else 41669ebabbSIngo Molnar #define REX_PREFIX 42669ebabbSIngo Molnar #endif 43669ebabbSIngo Molnar 44669ebabbSIngo Molnar extern u64 xfeatures_mask; 45669ebabbSIngo Molnar extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS]; 46669ebabbSIngo Molnar 47404f6aacSKees Cook extern void __init update_regset_xstate_info(unsigned int size, 48404f6aacSKees Cook u64 xstate_mask); 49669ebabbSIngo Molnar 500a265375SDave Hansen void fpu__xstate_clear_all_cpu_caps(void); 51abd16d68SSebastian Andrzej Siewior void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr); 52abd16d68SSebastian Andrzej Siewior const void *get_xsave_field_ptr(int xfeature_nr); 5399aa22d0SYu-cheng Yu int using_compacted_format(void); 5456583c9aSIngo Molnar int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 5556583c9aSIngo Molnar int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 566d7f7da5SIngo Molnar int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf); 576d7f7da5SIngo Molnar int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf); 58e63e5d5cSEric Biggers 59e63e5d5cSEric Biggers /* Validate an xstate header supplied by userspace (ptrace or sigreturn) */ 60e63e5d5cSEric Biggers extern int validate_xstate_header(const struct xstate_header *hdr); 61e63e5d5cSEric Biggers 62669ebabbSIngo Molnar #endif 63