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x86/fpu: Rename all the fpregs, xregs, fxregs and fregs handling functions

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Standardize the naming of the various functions that copy register
content in specific FPU context formats:

  copy_fxregs_to_kernel()         # was: fpu_fxsave()
  copy_xregs_to_kernel()          # was: xsave_state()

  copy_kernel_to_fregs()          # was: frstor_checking()
  copy_kernel_to_fxregs()         # was: fxrstor_checking()
  copy_kernel_to_xregs()          # was: fpu_xrstor_checking()
  copy_kernel_to_xregs_booting()  # was: xrstor_state_booting()

  copy_fregs_to_user()            # was: fsave_user()
  copy_fxregs_to_user()           # was: fxsave_user()
  copy_xregs_to_user()            # was: xsave_user()

  copy_user_to_fregs()            # was: frstor_user()
  copy_user_to_fxregs()           # was: fxrstor_user()
  copy_user_to_xregs()            # was: xrestore_user()
  copy_user_to_fpregs_zeroing()   # was: restore_user_xstate()

Eliminate fpu_xrstor_checking(), because it was just a wrapper.

No change in functionality.

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2015-04-30 11:34:09 +02:00
parent 815418890e
commit c681314421
5 changed files with 38 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kernel/fpu/core.c
View File

@@ -398,9 +398,9 @@ void fpu__drop(struct fpu *fpu)
static inline void copy_init_fpstate_to_fpregs(void)
{
if (use_xsave())
xrstor_state(&init_fpstate.xsave, -1);
copy_kernel_to_xregs(&init_fpstate.xsave, -1);
else
fxrstor_checking(&init_fpstate.fxsave);
copy_kernel_to_fxregs(&init_fpstate.fxsave);
}
/*

28
arch/x86/kernel/fpu/xstate.c
View File

@@ -260,11 +260,11 @@ static inline int copy_fpregs_to_sigframe(struct xsave_struct __user *buf)
int err;
if (use_xsave())
err = xsave_user(buf);
err = copy_xregs_to_user(buf);
else if (use_fxsr())
err = fxsave_user((struct i387_fxsave_struct __user *) buf);
err = copy_fxregs_to_user((struct i387_fxsave_struct __user *) buf);
else
err = fsave_user((struct i387_fsave_struct __user *) buf);
err = copy_fregs_to_user((struct i387_fsave_struct __user *) buf);
if (unlikely(err) && __clear_user(buf, xstate_size))
err = -EFAULT;
@@ -314,7 +314,7 @@ int copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size)
return -1;
/* Update the thread's fxstate to save the fsave header. */
if (ia32_fxstate)
fpu_fxsave(&tsk->thread.fpu);
copy_fxregs_to_kernel(&tsk->thread.fpu);
} else {
fpstate_sanitize_xstate(&tsk->thread.fpu);
if (__copy_to_user(buf_fx, xsave, xstate_size))
@@ -367,23 +367,23 @@ sanitize_restored_xstate(struct task_struct *tsk,
/*
* Restore the extended state if present. Otherwise, restore the FP/SSE state.
*/
static inline int restore_user_xstate(void __user *buf, u64 xbv, int fx_only)
static inline int copy_user_to_fpregs_zeroing(void __user *buf, u64 xbv, int fx_only)
{
if (use_xsave()) {
if ((unsigned long)buf % 64 || fx_only) {
u64 init_bv = xfeatures_mask & ~XSTATE_FPSSE;
xrstor_state(&init_fpstate.xsave, init_bv);
return fxrstor_user(buf);
copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
return copy_user_to_fxregs(buf);
} else {
u64 init_bv = xfeatures_mask & ~xbv;
if (unlikely(init_bv))
xrstor_state(&init_fpstate.xsave, init_bv);
return xrestore_user(buf, xbv);
copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
return copy_user_to_xregs(buf, xbv);
}
} else if (use_fxsr()) {
return fxrstor_user(buf);
return copy_user_to_fxregs(buf);
} else
return frstor_user(buf);
return copy_user_to_fregs(buf);
}
static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size)
@@ -471,7 +471,7 @@ static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size)
* state to the registers directly (with exceptions handled).
*/
user_fpu_begin();
if (restore_user_xstate(buf_fx, xfeatures, fx_only)) {
if (copy_user_to_fpregs_zeroing(buf_fx, xfeatures, fx_only)) {
fpu__clear(fpu);
return -1;
}
@@ -667,13 +667,13 @@ static void setup_init_fpu_buf(void)
/*
* Init all the features state with header_bv being 0x0
*/
xrstor_state_booting(&init_fpstate.xsave, -1);
copy_kernel_to_xregs_booting(&init_fpstate.xsave, -1);
/*
* Dump the init state again. This is to identify the init state
* of any feature which is not represented by all zero's.
*/
xsave_state_booting(&init_fpstate.xsave);
copy_xregs_to_kernel_booting(&init_fpstate.xsave);
}
/*