| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr); |
| 51 | const void *get_xsave_field_ptr(int xfeature_nr); |
| 52 | int using_compacted_format(void); |
| 53 | int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); |
| 54 | int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); |
| 55 | int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf); |
| 56 | int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf); |
| 57 | |
| 58 | /* Validate an xstate header supplied by userspace (ptrace or sigreturn) */ |
| 59 | extern int validate_xstate_header(const struct xstate_header *hdr); |
| 60 | |
| 61 | #endif |