1. 19 5月, 2015 40 次提交
    • I
      x86/fpu: Move xsave.h to fpu/xsave.h · a137fb6b
      Ingo Molnar 提交于
      Move the xsave.h header file to the FPU directory as well.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      a137fb6b
    • I
      x86/fpu: Rename i387.h to fpu/api.h · df6b35f4
      Ingo Molnar 提交于
      We already have fpu/types.h, move i387.h to fpu/api.h.
      
      The file name has become a misnomer anyway: it offers generic FPU APIs,
      but is not limited to i387 functionality.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      df6b35f4
    • I
      x86/fpu: Clean up fpu__clear() a bit · e11267c1
      Ingo Molnar 提交于
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      e11267c1
    • I
      x86/fpu: Rename fpu__flush_thread() to fpu__clear() · 2e8a3102
      Ingo Molnar 提交于
      The primary purpose of this function is to clear the current task's
      FPU before an exec(), to not leak information from the previous task,
      and to allow the new task to start with freshly initialized FPU
      registers.
      
      Rename the function to reflect this primary purpose.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      2e8a3102
    • I
      x86/fpu: Use 'struct fpu' in fpu__unlazy_stopped() · cc08d545
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      cc08d545
    • I
      x86/fpu: Use 'struct fpu' in fpstate_alloc_init() · db2b1d3a
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      db2b1d3a
    • I
      x86/fpu: Use 'struct fpu' in fpu__copy() · c69e098b
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      c69e098b
    • I
      x86/fpu: Use 'struct fpu' in fpu_copy() · f9bc977f
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      f9bc977f
    • I
      x86/fpu: Use 'struct fpu' in fpu__save() · 0c070595
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      0c070595
    • I
      x86/fpu: Use 'struct fpu' in __fpu_save() · a4d8fc2e
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      a4d8fc2e
    • I
      x86/fpu: Move __save_fpu() into fpu/core.c · 2d75bcf3
      Ingo Molnar 提交于
      This helper function is only used in fpu/core.c, move it there.
      
      This slightly speeds up compilation.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      2d75bcf3
    • I
      x86/fpu: Use 'struct fpu' in switch_fpu_finish() · 384a23f9
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      384a23f9
    • I
      x86/fpu: Use 'struct fpu' in switch_fpu_prepare() · cb8818b6
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      cb8818b6
    • I
      x86/fpu: Use 'struct fpu' in fpu_reset_state() · af2d94fd
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      af2d94fd
    • I
      x86/fpu: Use 'struct fpu' in restore_fpu_checking() · 11f2d50b
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      11f2d50b
    • I
      x86/fpu: Use 'struct fpu' in fpu_lazy_restore() · 66ddc2cb
      Ingo Molnar 提交于
      Also rename it to fpu_want_lazy_restore(), to better indicate that
      this function just tests whether we can do a lazy restore. (The old
      name suggested that it was doing the lazy restore, which is not
      the case.)
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      66ddc2cb
    • I
      x86/fpu: Remove task_disable_lazy_fpu_restore() · eb6a3251
      Ingo Molnar 提交于
      Replace task_disable_lazy_fpu_restore() with easier to read
      open-coded uses: we already update the fpu->last_cpu field
      explicitly in other cases.
      
      (This also removes yet another task_struct using FPU method.)
      
      Better explain the fpu::last_cpu field in the structure definition.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      eb6a3251
    • I
      x86/fpu: Remove 'struct task_struct' usage from drop_fpu() · ca6787ba
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      ca6787ba
    • I
      x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active · c5bedc68
      Ingo Molnar 提交于
      Introduce a simple fpu->fpstate_active flag in the fpu context data structure
      and use that instead of PF_USED_MATH in task->flags.
      
      Testing for this flag byte should be slightly more efficient than
      testing a bit in a bitmask, but the main advantage is that most
      FPU functions can now be performed on a 'struct fpu' alone, they
      don't need access to 'struct task_struct' anymore.
      
      There's a slight linecount increase, mostly due to the 'fpu' local
      variables and due to extra comments. The local variables will go away
      once we move most of the FPU methods to pure 'struct fpu' parameters.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      c5bedc68
    • I
      x86/fpu: Document fpu__unlazy_stopped() · af7f8721
      Ingo Molnar 提交于
      Explain its usage and also document a TODO item.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      af7f8721
    • I
      x86/fpu: Open code PF_USED_MATH usages · 4c138410
      Ingo Molnar 提交于
      PF_USED_MATH is used directly, but also in a handful of helper inlines.
      
      To ease the elimination of PF_USED_MATH, convert all inline helpers
      to open-coded PF_USED_MATH usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      4c138410
    • I
      x86/fpu: Remove 'struct task_struct' usage from __thread_fpu_begin() · 4540d3fa
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      4540d3fa
    • I
      x86/fpu: Remove 'struct task_struct' usage from __thread_fpu_end() · 35191e3f
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      35191e3f
    • I
      x86/fpu: Remove 'struct task_struct' usage from __thread_set_has_fpu() · c0311f63
      Ingo Molnar 提交于
      Migrate this function to pure 'struct fpu' usage.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      c0311f63
    • I
      x86/fpu: Change fpu_owner_task to fpu_fpregs_owner_ctx · 36b544dc
      Ingo Molnar 提交于
      Track the FPU owner context instead of the owner task: this change,
      together with other changes, will allow in subsequent patches the
      elimination of 'struct task_struct' usage in various FPU code:
      we'll be able to use 'struct fpu' only.
      
      There's no change in code size:
      
            text           data     bss      dec            hex filename
        13066467        2545248 1626112 17237827        1070743 vmlinux.before
        13066467        2545248 1626112 17237827        1070743 vmlinux.after
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      36b544dc
    • I
      x86/fpu: Move 'PER_CPU(fpu_owner_task)' to fpu/core.c · b0c050c5
      Ingo Molnar 提交于
      Move it closer to other per-cpu FPU data structures.
      
      This also unifies the 32-bit and 64-bit code.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      b0c050c5
    • I
      x86/fpu: Change __thread_clear_has_fpu() to 'struct fpu' parameter · 36fe6175
      Ingo Molnar 提交于
      We do this to make the code more readable, and also to be able to eliminate
      task_struct usage from most of the FPU code.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      36fe6175
    • I
      x86/fpu: Eliminate the __thread_has_fpu() wrapper · 276983f8
      Ingo Molnar 提交于
      Start migrating FPU methods towards using 'struct fpu *fpu'
      directly. __thread_has_fpu() is just a trivial wrapper around
      fpu->has_fpu, eliminate it.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      276983f8
    • I
      x86/fpu: Print out whether we are doing lazy/eager FPU context switches · 9a89b029
      Ingo Molnar 提交于
      Ever since the kernel started defaulting to eager FPU switches on modern Intel
      CPUs it's not been obvious whether a given system is using the lazy or the eager
      FPU context switching logic.
      
      So generate a boot message about which mode the FPU code is in:
      
        x86/fpu: Using 'lazy' FPU context switches.
      
      or:
      
        x86/fpu: Using 'eager' FPU context switches.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      9a89b029
    • I
      x86/fpu: Add debugging check to fpu_copy() · bfd6fc05
      Ingo Molnar 提交于
      Also add a bit of documentation.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      bfd6fc05
    • I
      x86/fpu: Move fpu_copy() to fpu/core.c · e102f30f
      Ingo Molnar 提交于
      Move fpu_copy() where its only user is.
      
      Beyond readability this also speeds up compilation, as fpu-internal.h
      is included in over a dozen .c files.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      e102f30f
    • I
      x86/fpu: Remove __save_init_fpu() · 6522d783
      Ingo Molnar 提交于
      __save_init_fpu() is just a trivial wrapper around fpu_save_init().
      
      Remove the extra layer of obfuscation.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      6522d783
    • I
      x86/fpu: Add kernel_fpu_disabled() · 085cc281
      Ingo Molnar 提交于
      Instead of open-coded in_kernel_fpu access, Use kernel_fpu_disabled() in
      interrupted_kernel_fpu_idle(), matching the other kernel_fpu_*() methods.
      
      Also add some documentation for in_kernel_fpu.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      085cc281
    • I
      x86/fpu: Add debug check to kernel_fpu_disable() · 3103ae3a
      Ingo Molnar 提交于
      We are not supposed to call kernel_fpu_disable() if we have not
      previously enabled it.
      
      Also use kernel_fpu_disable()/enable() in the __kernel_fpu_begin/end()
      primitives, instead of writing to in_kernel_fpu directly,
      so that we get the debugging checks.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      3103ae3a
    • I
      x86/fpu: Make kernel_fpu_disable/enable() static · 416d49ac
      Ingo Molnar 提交于
      This allows the compiler to inline them and to eliminate them:
      
         arch/x86/kernel/fpu/core.o:
      
         text    data     bss     dec     hex filename
         6741       4       8    6753    1a61 core.o.before
         6716       4       8    6728    1a48 core.o.after
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      416d49ac
    • I
      x86/fpu: Make task_xstate_cachep static · f55f88e2
      Ingo Molnar 提交于
      It's now local to fpu/core.c, make it static.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      f55f88e2
    • I
      x86/fpu: Uninline fpstate_free() and move it next to the allocation function · 5a12bf63
      Ingo Molnar 提交于
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      5a12bf63
    • I
      x86/fpu: Factor out fpu__copy() · a752b53d
      Ingo Molnar 提交于
      Introduce fpu__copy() and use it in arch_dup_task_struct(),
      thus moving another chunk of FPU logic to fpu/core.c.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      a752b53d
    • I
      x86/fpu: Move task_xstate_cachep handling to core.c · 8ffb53ab
      Ingo Molnar 提交于
      This code was historically in process.c, now we have FPU core internals in
      fpu/core.c instead - move it there.
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      8ffb53ab
    • I
      x86/fpu: Remove fpu_xsave() · 0afc4a94
      Ingo Molnar 提交于
      It's a pointless wrapper now - use xsave_state().
      Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>
      0afc4a94