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x86/fpu: Move various internal function prototypes to fpu/internal.h 

There are a number of FPU internal function prototypes and an inline function
in fpu/api.h, mostly placed so historically as the code grew over the years.

Move them over into fpu/internal.h where they belong. (Add sched.h include
to stackprotector.h which incorrectly relied on getting it from fpu/api.h.)

fpu/api.h is now a pure file that only contains FPU APIs intended for driver
use.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-04-26 16:56:05 +02:00
parent d63e79b114
commit 952f07ecbd
8 changed files with 33 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
arch/x86/include/asm/fpu/api.h
View File

@ -10,23 +10,8 @@
#ifndef _ASM_X86_FPU_API_H
#define _ASM_X86_FPU_API_H
#include <linux/sched.h>
#include <linux/hardirq.h>
struct pt_regs;
struct user_i387_struct;
extern int fpstate_alloc_init(struct fpu *fpu);
extern void fpstate_init(struct fpu *fpu);
extern void fpu__clear(struct task_struct *tsk);
extern int dump_fpu(struct pt_regs *, struct user_i387_struct *);
extern void fpu__restore(void);
extern void fpu__init_check_bugs(void);
extern void fpu__resume_cpu(void);
extern bool irq_fpu_usable(void);
/*
* Careful: __kernel_fpu_begin/end() must be called with preempt disabled
* and they don't touch the preempt state on their own.
@ -41,6 +26,7 @@ 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);
/*
* Some instructions like VIA's padlock instructions generate a spurious
@ -73,19 +59,4 @@ static inline void irq_ts_restore(int TS_state)
stts();
}
/*
* The question "does this thread have fpu access?"
* is slightly racy, since preemption could come in
* and revoke it immediately after the test.
*
* However, even in that very unlikely scenario,
* we can just assume we have FPU access - typically
* to save the FP state - we'll just take a #NM
* fault and get the FPU access back.
*/
static inline int user_has_fpu(void)
{
return current->thread.fpu.fpregs_active;
}
#endif /* _ASM_X86_FPU_API_H */

25
arch/x86/include/asm/fpu/internal.h
View File

@ -12,6 +12,7 @@
#include <linux/regset.h>
#include <linux/compat.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <asm/user.h>
@ -43,6 +44,15 @@ extern void fpu__init_system_xstate(void);
extern void fpu__init_cpu_xstate(void);
extern void fpu__init_system(struct cpuinfo_x86 *c);
extern int fpstate_alloc_init(struct fpu *fpu);
extern void fpstate_init(struct fpu *fpu);
extern void fpu__clear(struct task_struct *tsk);
extern int dump_fpu(struct pt_regs *, struct user_i387_struct *);
extern void fpu__restore(void);
extern void fpu__init_check_bugs(void);
extern void fpu__resume_cpu(void);
DECLARE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx);
extern void convert_from_fxsr(struct user_i387_ia32_struct *env,
@ -334,6 +344,21 @@ static inline void __fpregs_activate(struct fpu *fpu)
this_cpu_write(fpu_fpregs_owner_ctx, fpu);
}
/*
* The question "does this thread have fpu access?"
* is slightly racy, since preemption could come in
* and revoke it immediately after the test.
*
* However, even in that very unlikely scenario,
* we can just assume we have FPU access - typically
* to save the FP state - we'll just take a #NM
* fault and get the FPU access back.
*/
static inline int user_has_fpu(void)
{
return current->thread.fpu.fpregs_active;
}
/*
* Encapsulate the CR0.TS handling together with the
* software flag.

2
arch/x86/include/asm/stackprotector.h
View File

@ -39,7 +39,9 @@
#include <asm/processor.h>
#include <asm/percpu.h>
#include <asm/desc.h>
#include <linux/random.h>
#include <linux/sched.h>
/*
* 24 byte read-only segment initializer for stack canary. Linker

2
arch/x86/kernel/cpu/bugs.c
View File

@ -12,7 +12,7 @@
#include <asm/bugs.h>
#include <asm/processor.h>
#include <asm/processor-flags.h>
#include <asm/fpu/api.h>
#include <asm/fpu/internal.h>
#include <asm/msr.h>
#include <asm/paravirt.h>
#include <asm/alternative.h>

2
arch/x86/kvm/vmx.c
View File

@ -40,7 +40,7 @@
#include <asm/vmx.h>
#include <asm/virtext.h>
#include <asm/mce.h>
#include <asm/fpu/api.h>
#include <asm/fpu/internal.h>
#include <asm/xcr.h>
#include <asm/perf_event.h>
#include <asm/debugreg.h>

2
arch/x86/math-emu/fpu_entry.c
View File

@ -31,7 +31,7 @@
#include <asm/traps.h>
#include <asm/desc.h>
#include <asm/user.h>
#include <asm/fpu/api.h>
#include <asm/fpu/internal.h>
#include "fpu_system.h"
#include "fpu_emu.h"

1
arch/x86/power/cpu.c
View File

@ -19,6 +19,7 @@
#include <asm/page.h>
#include <asm/mce.h>
#include <asm/suspend.h>
#include <asm/fpu/internal.h>
#include <asm/debugreg.h>
#include <asm/cpu.h>

2
drivers/lguest/x86/core.c
View File

@ -46,7 +46,7 @@
#include <asm/setup.h>
#include <asm/lguest.h>
#include <asm/uaccess.h>
#include <asm/fpu/api.h>
#include <asm/fpu/internal.h>
#include <asm/tlbflush.h>
#include "../lg.h"