| /* SPDX-License-Identifier: GPL-2.0 */ | |
| /* | |
| * Copyright (C) 1994 Linus Torvalds | |
| * | |
| * Pentium III FXSR, SSE support | |
| * General FPU state handling cleanups | |
| * Gareth Hughes <gareth@valinux.com>, May 2000 | |
| * x86-64 work by Andi Kleen 2002 | |
| */ | |
| #ifndef _ASM_X86_FPU_API_H | |
| #define _ASM_X86_FPU_API_H | |
| /* | |
| * Use kernel_fpu_begin/end() if you intend to use FPU in kernel context. It | |
| * disables preemption so be careful if you intend to use it for long periods | |
| * of time. | |
| * If you intend to use the FPU in softirq you need to check first with | |
| * irq_fpu_usable() if it is possible. | |
| */ | |
| extern void kernel_fpu_begin(void); | |
| extern void kernel_fpu_end(void); | |
| extern bool irq_fpu_usable(void); | |
| /* | |
| * Query the presence of one or more xfeatures. Works on any legacy CPU as well. | |
| * | |
| * If 'feature_name' is set then put a human-readable description of | |
| * the feature there as well - this can be used to print error (or success) | |
| * messages. | |
| */ | |
| extern int cpu_has_xfeatures(u64 xfeatures_mask, const char **feature_name); | |
| #endif /* _ASM_X86_FPU_API_H */ |