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> 60cecca9dSRik van Riel #include <linux/types.h> 70cecca9dSRik van Riel 80cecca9dSRik van Riel #include <asm/processor.h> 90cecca9dSRik 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 24*8ab22804SFenghua Yu /* All currently supported user features */ 25*8ab22804SFenghua Yu #define XFEATURE_MASK_USER_SUPPORTED (XFEATURE_MASK_FP | \ 26a65050c6SYu-cheng Yu XFEATURE_MASK_SSE | \ 27d91cab78SDave Hansen XFEATURE_MASK_YMM | \ 28d91cab78SDave Hansen XFEATURE_MASK_OPMASK | \ 29d91cab78SDave Hansen XFEATURE_MASK_ZMM_Hi256 | \ 30c8df4009SDave Hansen XFEATURE_MASK_Hi16_ZMM | \ 312f7fada2SAndy Lutomirski XFEATURE_MASK_PKRU | \ 322f7fada2SAndy Lutomirski XFEATURE_MASK_BNDREGS | \ 332f7fada2SAndy Lutomirski XFEATURE_MASK_BNDCSR) 34669ebabbSIngo Molnar 35*8ab22804SFenghua Yu /* All currently supported supervisor features */ 36*8ab22804SFenghua Yu #define XFEATURE_MASK_SUPERVISOR_SUPPORTED (0) 37*8ab22804SFenghua Yu 38*8ab22804SFenghua Yu /* 39*8ab22804SFenghua Yu * Unsupported supervisor features. When a supervisor feature in this mask is 40*8ab22804SFenghua Yu * supported in the future, move it to the supported supervisor feature mask. 41*8ab22804SFenghua Yu */ 42*8ab22804SFenghua Yu #define XFEATURE_MASK_SUPERVISOR_UNSUPPORTED (XFEATURE_MASK_PT) 43*8ab22804SFenghua Yu 44*8ab22804SFenghua Yu /* All supervisor states including supported and unsupported states. */ 45*8ab22804SFenghua Yu #define XFEATURE_MASK_SUPERVISOR_ALL (XFEATURE_MASK_SUPERVISOR_SUPPORTED | \ 46*8ab22804SFenghua Yu XFEATURE_MASK_SUPERVISOR_UNSUPPORTED) 47*8ab22804SFenghua Yu 48669ebabbSIngo Molnar #ifdef CONFIG_X86_64 49669ebabbSIngo Molnar #define REX_PREFIX "0x48, " 50669ebabbSIngo Molnar #else 51669ebabbSIngo Molnar #define REX_PREFIX 52669ebabbSIngo Molnar #endif 53669ebabbSIngo Molnar 54669ebabbSIngo Molnar extern u64 xfeatures_mask; 55669ebabbSIngo Molnar extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS]; 56669ebabbSIngo Molnar 57404f6aacSKees Cook extern void __init update_regset_xstate_info(unsigned int size, 58404f6aacSKees Cook u64 xstate_mask); 59669ebabbSIngo Molnar 60abd16d68SSebastian Andrzej Siewior void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr); 61abd16d68SSebastian Andrzej Siewior const void *get_xsave_field_ptr(int xfeature_nr); 6299aa22d0SYu-cheng Yu int using_compacted_format(void); 6356583c9aSIngo Molnar int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 6456583c9aSIngo Molnar int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 656d7f7da5SIngo Molnar int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf); 666d7f7da5SIngo Molnar int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf); 67e63e5d5cSEric Biggers 68e63e5d5cSEric Biggers /* Validate an xstate header supplied by userspace (ptrace or sigreturn) */ 695274e6c1SFenghua Yu int validate_user_xstate_header(const struct xstate_header *hdr); 70e63e5d5cSEric Biggers 71669ebabbSIngo Molnar #endif 72