arch/x86/kernel/fpu/internal.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __X86_KERNEL_FPU_INTERNAL_H
#define __X86_KERNEL_FPU_INTERNAL_H

extern struct fpstate init_fpstate;

/* CPU feature check wrappers */
static __always_inline __pure bool use_xsave(void)
{
	return cpu_feature_enabled(X86_FEATURE_XSAVE);
}

static __always_inline __pure bool use_fxsr(void)
{
	return cpu_feature_enabled(X86_FEATURE_FXSR);
}

#ifdef CONFIG_X86_DEBUG_FPU
# define WARN_ON_FPU(x) WARN_ON_ONCE(x)
#else
# define WARN_ON_FPU(x) ({ BUILD_BUG_ON_INVALID(x); 0; })
#endif

/* Used in init.c */
extern void fpstate_init_user(struct fpstate *fpstate);
extern void fpstate_reset(struct fpu *fpu);

#endif