/* 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 /* * Careful: __kernel_fpu_begin/end() must be called with preempt disabled * and they don't touch the preempt state on their own. * If you enable preemption after __kernel_fpu_begin(), preempt notifier * should call the __kernel_fpu_end() to prevent the kernel/user FPU * state from getting corrupted. KVM for example uses this model. * * All other cases use kernel_fpu_begin/end() which disable preemption * during kernel FPU usage. */ extern void __kernel_fpu_begin(void); extern void __kernel_fpu_end(void); 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 */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 37 | 59.68% | 7 | 53.85% |
| Roland McGrath | 15 | 24.19% | 1 | 7.69% |
| Suresh B. Siddha | 4 | 6.45% | 2 | 15.38% |
| Linus Torvalds | 3 | 4.84% | 1 | 7.69% |
| Jaswinder Singh Rajput | 2 | 3.23% | 1 | 7.69% |
| Greg Kroah-Hartman | 1 | 1.61% | 1 | 7.69% |
| Total | 62 | 100.00% | 13 | 100.00% |