text: /*-
   * Copyright (c) 2011 NetApp, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $FreeBSD: soc2013/dpl/head/sys/amd64/vmm/vmm_stat.h 251628 2013-05-10 02:59:49Z neel $
   */
  
  #ifndef _VMM_STAT_H_
  #define	_VMM_STAT_H_
  
  struct vm;
  
  #define	MAX_VMM_STAT_ELEMS	64		/* arbitrary */
  
  enum vmm_stat_scope {
  	VMM_STAT_SCOPE_ANY,
  	VMM_STAT_SCOPE_INTEL,		/* Intel VMX specific statistic */
  	VMM_STAT_SCOPE_AMD,		/* AMD SVM specific statistic */
  };
  
  struct vmm_stat_type {
  	int	index;			/* position in the stats buffer */
  	int	nelems;			/* standalone or array */
  	const char *desc;		/* description of statistic */
  	enum vmm_stat_scope scope;
  };
  
  void	vmm_stat_init(void *arg);
  
  #define	VMM_STAT_DEFINE(type, nelems, desc, scope)			\
  	struct vmm_stat_type type[1] = {				\
  		{ -1, nelems, desc, scope }				\
  	};								\
  	SYSINIT(type##_stat, SI_SUB_KLD, SI_ORDER_ANY, vmm_stat_init, type)
  
  #define	VMM_STAT_DECLARE(type)						\
  	extern struct vmm_stat_type type[1]
  
  #define	VMM_STAT(type, desc)		\
  	VMM_STAT_DEFINE(type, 1, desc, VMM_STAT_SCOPE_ANY)
  #define	VMM_STAT_INTEL(type, desc)	\
  	VMM_STAT_DEFINE(type, 1, desc, VMM_STAT_SCOPE_INTEL)
  #define	VMM_STAT_AMD(type, desc)	\
  	VMM_STAT_DEFINE(type, 1, desc, VMM_STAT_SCOPE_AMD)
  
  #define	VMM_STAT_ARRAY(type, nelems, desc)	\
  	VMM_STAT_DEFINE(type, nelems, desc, VMM_STAT_SCOPE_ANY)
  
  void	*vmm_stat_alloc(void);
  void 	vmm_stat_free(void *vp);
  
  /*
   * 'buf' should be at least fit 'MAX_VMM_STAT_TYPES' entries
   */
  int	vmm_stat_copy(struct vm *vm, int vcpu, int *num_stats, uint64_t *buf);
  int	vmm_stat_desc_copy(int index, char *buf, int buflen);
  
  static void __inline
  vmm_stat_array_incr(struct vm *vm, int vcpu, struct vmm_stat_type *vst,
  		    int statidx, uint64_t x)
  {
  #ifdef VMM_KEEP_STATS
  	uint64_t *stats;
  	
  	stats = vcpu_stats(vm, vcpu);
  
  	if (vst->index >= 0 && statidx < vst->nelems)
  		stats[vst->index + statidx] += x;
  #endif
  }
  		   
  
  static void __inline
  vmm_stat_incr(struct vm *vm, int vcpu, struct vmm_stat_type *vst, uint64_t x)
  {
  
  #ifdef VMM_KEEP_STATS
  	vmm_stat_array_incr(vm, vcpu, vst, 0, x);
  #endif
  }
  
  VMM_STAT_DECLARE(VCPU_MIGRATIONS);
  VMM_STAT_DECLARE(VMEXIT_COUNT);
  VMM_STAT_DECLARE(VMEXIT_EXTINT);
  VMM_STAT_DECLARE(VMEXIT_HLT);
  VMM_STAT_DECLARE(VMEXIT_CR_ACCESS);
  VMM_STAT_DECLARE(VMEXIT_RDMSR);
  VMM_STAT_DECLARE(VMEXIT_WRMSR);
  VMM_STAT_DECLARE(VMEXIT_MTRAP);
  VMM_STAT_DECLARE(VMEXIT_PAUSE);
  VMM_STAT_DECLARE(VMEXIT_INTR_WINDOW);
  VMM_STAT_DECLARE(VMEXIT_NMI_WINDOW);
  VMM_STAT_DECLARE(VMEXIT_INOUT);
  VMM_STAT_DECLARE(VMEXIT_CPUID);
  VMM_STAT_DECLARE(VMEXIT_EPT_FAULT);
  VMM_STAT_DECLARE(VMEXIT_UNKNOWN);
  VMM_STAT_DECLARE(VMEXIT_ASTPENDING);
  VMM_STAT_DECLARE(VMEXIT_USERSPACE);
  #endif
  