#include <linux/hardirq.h>
+#define CREATE_TRACE_POINTS
+#include <asm/trace/fpu.h>
+
/*
* Represents the initial FPU state. It's mostly (but not completely) zeroes,
* depending on the FPU hardware format:
WARN_ON_FPU(fpu != ¤t->thread.fpu);
preempt_disable();
+ trace_x86_fpu_before_save(fpu);
if (fpu->fpregs_active) {
if (!copy_fpregs_to_fpstate(fpu)) {
if (use_eager_fpu())
fpregs_deactivate(fpu);
}
}
+ trace_x86_fpu_after_save(fpu);
preempt_enable();
}
EXPORT_SYMBOL_GPL(fpu__save);
}
preempt_enable();
+ trace_x86_fpu_copy_src(src_fpu);
+ trace_x86_fpu_copy_dst(dst_fpu);
+
return 0;
}
if (!fpu->fpstate_active) {
fpstate_init(&fpu->state);
+ trace_x86_fpu_init_state(fpu);
+ trace_x86_fpu_activate_state(fpu);
/* Safe to do for the current task: */
fpu->fpstate_active = 1;
}
} else {
if (!fpu->fpstate_active) {
fpstate_init(&fpu->state);
+ trace_x86_fpu_init_state(fpu);
+ trace_x86_fpu_activate_state(fpu);
/* Safe to do for current and for stopped child tasks: */
fpu->fpstate_active = 1;
}
fpu->last_cpu = -1;
} else {
fpstate_init(&fpu->state);
+ trace_x86_fpu_init_state(fpu);
+ trace_x86_fpu_activate_state(fpu);
/* Safe to do for stopped child tasks: */
fpu->fpstate_active = 1;
}
/* Avoid __kernel_fpu_begin() right after fpregs_activate() */
kernel_fpu_disable();
+ trace_x86_fpu_before_restore(fpu);
fpregs_activate(fpu);
copy_kernel_to_fpregs(&fpu->state);
fpu->counter++;
+ trace_x86_fpu_after_restore(fpu);
kernel_fpu_enable();
}
EXPORT_SYMBOL_GPL(fpu__restore);
fpu->fpstate_active = 0;
+ trace_x86_fpu_dropped(fpu);
+
preempt_enable();
}