1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2669ebabbSIngo Molnar #ifndef __ASM_X86_XSAVE_H 3669ebabbSIngo Molnar #define __ASM_X86_XSAVE_H 4669ebabbSIngo Molnar 5669ebabbSIngo Molnar #include <linux/types.h> 6669ebabbSIngo Molnar #include <asm/processor.h> 759a36d16SIngo Molnar #include <linux/uaccess.h> 8669ebabbSIngo Molnar 9669ebabbSIngo Molnar /* Bit 63 of XCR0 is reserved for future expansion */ 10d91cab78SDave Hansen #define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63))) 11669ebabbSIngo Molnar 12677b98bdSIngo Molnar #define XSTATE_CPUID 0x0000000d 13677b98bdSIngo Molnar 14669ebabbSIngo Molnar #define FXSAVE_SIZE 512 15669ebabbSIngo Molnar 16669ebabbSIngo Molnar #define XSAVE_HDR_SIZE 64 17669ebabbSIngo Molnar #define XSAVE_HDR_OFFSET FXSAVE_SIZE 18669ebabbSIngo Molnar 19669ebabbSIngo Molnar #define XSAVE_YMM_SIZE 256 20669ebabbSIngo Molnar #define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET) 21669ebabbSIngo Molnar 221499ce2dSYu-cheng Yu /* Supervisor features */ 231499ce2dSYu-cheng Yu #define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT) 241499ce2dSYu-cheng Yu 252f7fada2SAndy Lutomirski /* All currently supported features */ 262f7fada2SAndy Lutomirski #define XCNTXT_MASK (XFEATURE_MASK_FP | \ 27a65050c6SYu-cheng Yu XFEATURE_MASK_SSE | \ 28d91cab78SDave Hansen XFEATURE_MASK_YMM | \ 29d91cab78SDave Hansen XFEATURE_MASK_OPMASK | \ 30d91cab78SDave Hansen XFEATURE_MASK_ZMM_Hi256 | \ 31c8df4009SDave Hansen XFEATURE_MASK_Hi16_ZMM | \ 322f7fada2SAndy Lutomirski XFEATURE_MASK_PKRU | \ 332f7fada2SAndy Lutomirski XFEATURE_MASK_BNDREGS | \ 342f7fada2SAndy Lutomirski XFEATURE_MASK_BNDCSR) 35669ebabbSIngo Molnar 36669ebabbSIngo Molnar #ifdef CONFIG_X86_64 37669ebabbSIngo Molnar #define REX_PREFIX "0x48, " 38669ebabbSIngo Molnar #else 39669ebabbSIngo Molnar #define REX_PREFIX 40669ebabbSIngo Molnar #endif 41669ebabbSIngo Molnar 42669ebabbSIngo Molnar extern u64 xfeatures_mask; 43669ebabbSIngo Molnar extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS]; 44669ebabbSIngo Molnar 45404f6aacSKees Cook extern void __init update_regset_xstate_info(unsigned int size, 46404f6aacSKees Cook u64 xstate_mask); 47669ebabbSIngo Molnar 480a265375SDave Hansen void fpu__xstate_clear_all_cpu_caps(void); 49c47ada30SIngo Molnar void *get_xsave_addr(struct xregs_state *xsave, int xstate); 5004cd027bSDave Hansen const void *get_xsave_field_ptr(int xstate_field); 5199aa22d0SYu-cheng Yu int using_compacted_format(void); 5256583c9aSIngo Molnar int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 5356583c9aSIngo Molnar int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); 546d7f7da5SIngo Molnar int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf); 556d7f7da5SIngo Molnar int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf); 56e63e5d5cSEric Biggers 57e63e5d5cSEric Biggers /* Validate an xstate header supplied by userspace (ptrace or sigreturn) */ 58e63e5d5cSEric Biggers extern int validate_xstate_header(const struct xstate_header *hdr); 59e63e5d5cSEric Biggers 60669ebabbSIngo Molnar #endif 61