author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
child 2 | d1f6d8b6f81c |
permissions | -rw-r--r-- |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Copyright (C) 1994 Linus Torvalds |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Pentium III FXSR, SSE support |
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Port of Linux 2.6.28 for use with network simulation cradle.
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5 |
* General FPU state handling cleanups |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Gareth Hughes <gareth@valinux.com>, May 2000 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* x86-64 work by Andi Kleen 2002 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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8 |
*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifndef _ASM_X86_I387_H |
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#define _ASM_X86_I387_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/sched.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/kernel_stat.h> |
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#include <linux/regset.h> |
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#include <linux/hardirq.h> |
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#include <asm/asm.h> |
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#include <asm/processor.h> |
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#include <asm/sigcontext.h> |
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#include <asm/user.h> |
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#include <asm/uaccess.h> |
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#include <asm/xsave.h> |
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|
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extern unsigned int sig_xstate_size; |
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extern void fpu_init(void); |
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extern void mxcsr_feature_mask_init(void); |
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extern int init_fpu(struct task_struct *child); |
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extern asmlinkage void math_state_restore(void); |
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extern void init_thread_xstate(void); |
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extern int dump_fpu(struct pt_regs *, struct user_i387_struct *); |
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|
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extern user_regset_active_fn fpregs_active, xfpregs_active; |
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extern user_regset_get_fn fpregs_get, xfpregs_get, fpregs_soft_get; |
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extern user_regset_set_fn fpregs_set, xfpregs_set, fpregs_soft_set; |
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|
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extern struct _fpx_sw_bytes fx_sw_reserved; |
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#ifdef CONFIG_IA32_EMULATION |
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extern unsigned int sig_xstate_ia32_size; |
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extern struct _fpx_sw_bytes fx_sw_reserved_ia32; |
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struct _fpstate_ia32; |
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struct _xstate_ia32; |
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extern int save_i387_xstate_ia32(void __user *buf); |
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extern int restore_i387_xstate_ia32(void __user *buf); |
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#endif |
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|
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#define X87_FSW_ES (1 << 7) /* Exception Summary */ |
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|
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#ifdef CONFIG_X86_64 |
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|
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/* Ignore delayed exceptions from user space */ |
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static inline void tolerant_fwait(void) |
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{ |
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asm volatile("1: fwait\n" |
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"2:\n" |
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Port of Linux 2.6.28 for use with network simulation cradle.
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_ASM_EXTABLE(1b, 2b)); |
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} |
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|
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static inline int fxrstor_checking(struct i387_fxsave_struct *fx) |
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{ |
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int err; |
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|
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asm volatile("1: rex64/fxrstor (%[fx])\n\t" |
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"2:\n" |
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".section .fixup,\"ax\"\n" |
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"3: movl $-1,%[err]\n" |
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" jmp 2b\n" |
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".previous\n" |
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_ASM_EXTABLE(1b, 3b) |
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: [err] "=r" (err) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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#if 0 /* See comment in __save_init_fpu() below. */ |
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: [fx] "r" (fx), "m" (*fx), "0" (0)); |
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#else |
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Port of Linux 2.6.28 for use with network simulation cradle.
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: [fx] "cdaSDb" (fx), "m" (*fx), "0" (0)); |
aa628870c1d3
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#endif |
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Port of Linux 2.6.28 for use with network simulation cradle.
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return err; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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} |
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|
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static inline int restore_fpu_checking(struct task_struct *tsk) |
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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if (task_thread_info(tsk)->status & TS_XSAVE) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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81 |
return xrstor_checking(&tsk->thread.xstate->xsave); |
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else |
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return fxrstor_checking(&tsk->thread.xstate->fxsave); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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84 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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85 |
|
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/* AMD CPUs don't save/restore FDP/FIP/FOP unless an exception |
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87 |
is pending. Clear the x87 state here by setting it to fixed |
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88 |
values. The kernel data segment can be sometimes 0 and sometimes |
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Port of Linux 2.6.28 for use with network simulation cradle.
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89 |
new user value. Both should be ok. |
aa628870c1d3
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90 |
Use the PDA as safe address because it should be already in L1. */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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91 |
static inline void clear_fpu_state(struct task_struct *tsk) |
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{ |
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struct xsave_struct *xstate = &tsk->thread.xstate->xsave; |
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struct i387_fxsave_struct *fx = &tsk->thread.xstate->fxsave; |
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|
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/* |
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* xsave header may indicate the init state of the FP. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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98 |
*/ |
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if ((task_thread_info(tsk)->status & TS_XSAVE) && |
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Port of Linux 2.6.28 for use with network simulation cradle.
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!(xstate->xsave_hdr.xstate_bv & XSTATE_FP)) |
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101 |
return; |
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102 |
|
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103 |
if (unlikely(fx->swd & X87_FSW_ES)) |
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104 |
asm volatile("fnclex"); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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105 |
alternative_input(ASM_NOP8 ASM_NOP2, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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106 |
" emms\n" /* clear stack tags */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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107 |
" fildl %%gs:0", /* load to clear state */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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108 |
X86_FEATURE_FXSAVE_LEAK); |
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109 |
} |
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110 |
|
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111 |
static inline int fxsave_user(struct i387_fxsave_struct __user *fx) |
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|
112 |
{ |
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113 |
int err; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
114 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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115 |
asm volatile("1: rex64/fxsave (%[fx])\n\t" |
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Port of Linux 2.6.28 for use with network simulation cradle.
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116 |
"2:\n" |
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Port of Linux 2.6.28 for use with network simulation cradle.
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117 |
".section .fixup,\"ax\"\n" |
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118 |
"3: movl $-1,%[err]\n" |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
119 |
" jmp 2b\n" |
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Port of Linux 2.6.28 for use with network simulation cradle.
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120 |
".previous\n" |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
121 |
_ASM_EXTABLE(1b, 3b) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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122 |
: [err] "=r" (err), "=m" (*fx) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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123 |
#if 0 /* See comment in __fxsave_clear() below. */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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124 |
: [fx] "r" (fx), "0" (0)); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
125 |
#else |
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126 |
: [fx] "cdaSDb" (fx), "0" (0)); |
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127 |
#endif |
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|
128 |
if (unlikely(err) && |
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129 |
__clear_user(fx, sizeof(struct i387_fxsave_struct))) |
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130 |
err = -EFAULT; |
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131 |
/* No need to clear here because the caller clears USED_MATH */ |
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132 |
return err; |
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|
133 |
} |
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|
134 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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135 |
static inline void fxsave(struct task_struct *tsk) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
136 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
137 |
/* Using "rex64; fxsave %0" is broken because, if the memory operand |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
138 |
uses any extended registers for addressing, a second REX prefix |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
139 |
will be generated (to the assembler, rex64 followed by semicolon |
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Port of Linux 2.6.28 for use with network simulation cradle.
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140 |
is a separate instruction), and hence the 64-bitness is lost. */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
141 |
#if 0 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
142 |
/* Using "fxsaveq %0" would be the ideal choice, but is only supported |
aa628870c1d3
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143 |
starting with gas 2.16. */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
144 |
__asm__ __volatile__("fxsaveq %0" |
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Port of Linux 2.6.28 for use with network simulation cradle.
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145 |
: "=m" (tsk->thread.xstate->fxsave)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
146 |
#elif 0 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
147 |
/* Using, as a workaround, the properly prefixed form below isn't |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
148 |
accepted by any binutils version so far released, complaining that |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
149 |
the same type of prefix is used twice if an extended register is |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
150 |
needed for addressing (fix submitted to mainline 2005-11-21). */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
151 |
__asm__ __volatile__("rex64/fxsave %0" |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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152 |
: "=m" (tsk->thread.xstate->fxsave)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
153 |
#else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
154 |
/* This, however, we can work around by forcing the compiler to select |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
155 |
an addressing mode that doesn't require extended registers. */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
156 |
__asm__ __volatile__("rex64/fxsave (%1)" |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
157 |
: "=m" (tsk->thread.xstate->fxsave) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
158 |
: "cdaSDb" (&tsk->thread.xstate->fxsave)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
159 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
160 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
161 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
162 |
static inline void __save_init_fpu(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
163 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
164 |
if (task_thread_info(tsk)->status & TS_XSAVE) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
165 |
xsave(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
166 |
else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
167 |
fxsave(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
168 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
169 |
clear_fpu_state(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
170 |
task_thread_info(tsk)->status &= ~TS_USEDFPU; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
171 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
172 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
173 |
#else /* CONFIG_X86_32 */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
174 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
175 |
extern void finit(void); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
176 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
177 |
static inline void tolerant_fwait(void) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
178 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
179 |
asm volatile("fnclex ; fwait"); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
180 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
181 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
182 |
static inline void restore_fpu(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
183 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
184 |
if (task_thread_info(tsk)->status & TS_XSAVE) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
185 |
xrstor_checking(&tsk->thread.xstate->xsave); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
186 |
return; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
187 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
188 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
189 |
* The "nop" is needed to make the instructions the same |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
190 |
* length. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
191 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
192 |
alternative_input( |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
193 |
"nop ; frstor %1", |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
194 |
"fxrstor %1", |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
195 |
X86_FEATURE_FXSR, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
196 |
"m" (tsk->thread.xstate->fxsave)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
197 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
198 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
199 |
/* We need a safe address that is cheap to find and that is already |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
200 |
in L1 during context switch. The best choices are unfortunately |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
201 |
different for UP and SMP */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
202 |
#ifdef CONFIG_SMP |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
203 |
#define safe_address (__per_cpu_offset[0]) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
204 |
#else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
205 |
#define safe_address (kstat_cpu(0).cpustat.user) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
206 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
207 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
208 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
209 |
* These must be called with preempt disabled |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
210 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
211 |
static inline void __save_init_fpu(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
212 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
213 |
if (task_thread_info(tsk)->status & TS_XSAVE) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
214 |
struct xsave_struct *xstate = &tsk->thread.xstate->xsave; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
215 |
struct i387_fxsave_struct *fx = &tsk->thread.xstate->fxsave; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
216 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
217 |
xsave(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
218 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
219 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
220 |
* xsave header may indicate the init state of the FP. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
221 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
222 |
if (!(xstate->xsave_hdr.xstate_bv & XSTATE_FP)) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
223 |
goto end; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
224 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
225 |
if (unlikely(fx->swd & X87_FSW_ES)) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
226 |
asm volatile("fnclex"); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
227 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
228 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
229 |
* we can do a simple return here or be paranoid :) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
230 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
231 |
goto clear_state; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
232 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
233 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
234 |
/* Use more nops than strictly needed in case the compiler |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
235 |
varies code */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
236 |
alternative_input( |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
237 |
"fnsave %[fx] ;fwait;" GENERIC_NOP8 GENERIC_NOP4, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
238 |
"fxsave %[fx]\n" |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
239 |
"bt $7,%[fsw] ; jnc 1f ; fnclex\n1:", |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
240 |
X86_FEATURE_FXSR, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
241 |
[fx] "m" (tsk->thread.xstate->fxsave), |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
242 |
[fsw] "m" (tsk->thread.xstate->fxsave.swd) : "memory"); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
243 |
clear_state: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
244 |
/* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
245 |
is pending. Clear the x87 state here by setting it to fixed |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
246 |
values. safe_address is a random variable that should be in L1 */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
247 |
alternative_input( |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
248 |
GENERIC_NOP8 GENERIC_NOP2, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
249 |
"emms\n\t" /* clear stack tags */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
250 |
"fildl %[addr]", /* set F?P to defined value */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
251 |
X86_FEATURE_FXSAVE_LEAK, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
252 |
[addr] "m" (safe_address)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
253 |
end: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
254 |
task_thread_info(tsk)->status &= ~TS_USEDFPU; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
255 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
256 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
257 |
#endif /* CONFIG_X86_64 */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
258 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
259 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
260 |
* Signal frame handlers... |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
261 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
262 |
extern int save_i387_xstate(void __user *buf); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
263 |
extern int restore_i387_xstate(void __user *buf); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
264 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
265 |
static inline void __unlazy_fpu(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
266 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
267 |
if (task_thread_info(tsk)->status & TS_USEDFPU) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
268 |
__save_init_fpu(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
269 |
stts(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
270 |
} else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
271 |
tsk->fpu_counter = 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
272 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
273 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
274 |
static inline void __clear_fpu(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
275 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
276 |
if (task_thread_info(tsk)->status & TS_USEDFPU) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
277 |
tolerant_fwait(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
278 |
task_thread_info(tsk)->status &= ~TS_USEDFPU; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
279 |
stts(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
280 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
281 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
282 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
283 |
static inline void kernel_fpu_begin(void) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
284 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
285 |
struct thread_info *me = current_thread_info(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
286 |
preempt_disable(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
287 |
if (me->status & TS_USEDFPU) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
288 |
__save_init_fpu(me->task); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
289 |
else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
290 |
clts(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
291 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
292 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
293 |
static inline void kernel_fpu_end(void) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
294 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
295 |
stts(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
296 |
preempt_enable(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
297 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
298 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
299 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
300 |
* Some instructions like VIA's padlock instructions generate a spurious |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
301 |
* DNA fault but don't modify SSE registers. And these instructions |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
302 |
* get used from interrupt context aswell. To prevent these kernel instructions |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
303 |
* in interrupt context interact wrongly with other user/kernel fpu usage, we |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
304 |
* should use them only in the context of irq_ts_save/restore() |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
305 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
306 |
static inline int irq_ts_save(void) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
307 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
308 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
309 |
* If we are in process context, we are ok to take a spurious DNA fault. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
310 |
* Otherwise, doing clts() in process context require pre-emption to |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
311 |
* be disabled or some heavy lifting like kernel_fpu_begin() |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
312 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
313 |
if (!in_interrupt()) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
314 |
return 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
315 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
316 |
if (read_cr0() & X86_CR0_TS) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
317 |
clts(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
318 |
return 1; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
319 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
320 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
321 |
return 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
322 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
323 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
324 |
static inline void irq_ts_restore(int TS_state) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
325 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
326 |
if (TS_state) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
327 |
stts(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
328 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
329 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
330 |
#ifdef CONFIG_X86_64 |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
331 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
332 |
static inline void save_init_fpu(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
333 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
334 |
__save_init_fpu(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
335 |
stts(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
336 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
337 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
338 |
#define unlazy_fpu __unlazy_fpu |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
339 |
#define clear_fpu __clear_fpu |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
340 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
341 |
#else /* CONFIG_X86_32 */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* These disable preemption on their own and are safe |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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static inline void save_init_fpu(struct task_struct *tsk) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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348 |
preempt_disable(); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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349 |
__save_init_fpu(tsk); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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350 |
stts(); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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351 |
preempt_enable(); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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352 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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353 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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354 |
static inline void unlazy_fpu(struct task_struct *tsk) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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355 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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356 |
preempt_disable(); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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357 |
__unlazy_fpu(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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358 |
preempt_enable(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
359 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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361 |
static inline void clear_fpu(struct task_struct *tsk) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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363 |
preempt_disable(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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364 |
__clear_fpu(tsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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365 |
preempt_enable(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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366 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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367 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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368 |
#endif /* CONFIG_X86_64 */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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369 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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370 |
/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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371 |
* i387 state interaction |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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372 |
*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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static inline unsigned short get_fpu_cwd(struct task_struct *tsk) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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374 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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375 |
if (cpu_has_fxsr) { |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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376 |
return tsk->thread.xstate->fxsave.cwd; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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377 |
} else { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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378 |
return (unsigned short)tsk->thread.xstate->fsave.cwd; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
379 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
380 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
381 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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382 |
static inline unsigned short get_fpu_swd(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
383 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
384 |
if (cpu_has_fxsr) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
385 |
return tsk->thread.xstate->fxsave.swd; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
386 |
} else { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
387 |
return (unsigned short)tsk->thread.xstate->fsave.swd; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
388 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
389 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
390 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
391 |
static inline unsigned short get_fpu_mxcsr(struct task_struct *tsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
392 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
393 |
if (cpu_has_xmm) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
394 |
return tsk->thread.xstate->fxsave.mxcsr; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
395 |
} else { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
396 |
return MXCSR_DEFAULT; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
397 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
398 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
399 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
400 |
#endif /* _ASM_X86_I387_H */ |