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kernel/linux-imx6_3.14.28/arch/powerpc/kvm/timing.h 3.2 KB
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  /*
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, version 2, as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   *
   * Copyright IBM Corp. 2008
   *
   * Authors: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
   */
  
  #ifndef __POWERPC_KVM_EXITTIMING_H__
  #define __POWERPC_KVM_EXITTIMING_H__
  
  #include <linux/kvm_host.h>
  #include <asm/kvm_host.h>
  
  #ifdef CONFIG_KVM_EXIT_TIMING
  void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu);
  void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu);
  void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id);
  void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu);
  
  static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type)
  {
  	vcpu->arch.last_exit_type = type;
  }
  
  #else
  /* if exit timing is not configured there is no need to build the c file */
  static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}
  static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}
  static inline void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu,
  						unsigned int id) {}
  static inline void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
  static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type) {}
  #endif /* CONFIG_KVM_EXIT_TIMING */
  
  /* account the exit in kvm_stats */
  static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)
  {
  	/* type has to be known at build time for optimization */
  
  	/* The BUILD_BUG_ON below breaks in funny ways, commented out
  	 * for now ... -BenH
  	BUILD_BUG_ON(!__builtin_constant_p(type));
  	*/
  	switch (type) {
  	case EXT_INTR_EXITS:
  		vcpu->stat.ext_intr_exits++;
  		break;
  	case DEC_EXITS:
  		vcpu->stat.dec_exits++;
  		break;
  	case EMULATED_INST_EXITS:
  		vcpu->stat.emulated_inst_exits++;
  		break;
  	case DCR_EXITS:
  		vcpu->stat.dcr_exits++;
  		break;
  	case DSI_EXITS:
  		vcpu->stat.dsi_exits++;
  		break;
  	case ISI_EXITS:
  		vcpu->stat.isi_exits++;
  		break;
  	case SYSCALL_EXITS:
  		vcpu->stat.syscall_exits++;
  		break;
  	case DTLB_REAL_MISS_EXITS:
  		vcpu->stat.dtlb_real_miss_exits++;
  		break;
  	case DTLB_VIRT_MISS_EXITS:
  		vcpu->stat.dtlb_virt_miss_exits++;
  		break;
  	case MMIO_EXITS:
  		vcpu->stat.mmio_exits++;
  		break;
  	case ITLB_REAL_MISS_EXITS:
  		vcpu->stat.itlb_real_miss_exits++;
  		break;
  	case ITLB_VIRT_MISS_EXITS:
  		vcpu->stat.itlb_virt_miss_exits++;
  		break;
  	case SIGNAL_EXITS:
  		vcpu->stat.signal_exits++;
  		break;
  	case DBELL_EXITS:
  		vcpu->stat.dbell_exits++;
  		break;
  	case GDBELL_EXITS:
  		vcpu->stat.gdbell_exits++;
  		break;
  	}
  }
  
  /* wrapper to set exit time and account for it in kvm_stats */
  static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)
  {
  	kvmppc_set_exit_type(vcpu, type);
  	kvmppc_account_exit_stat(vcpu, type);
  }
  
  #endif /* __POWERPC_KVM_EXITTIMING_H__ */