arch/powerpc/kvm/timing.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *
   4  * Copyright IBM Corp. 2008
   5  *
   6  * Authors: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
   7  */
   8
   9 #ifndef __POWERPC_KVM_EXITTIMING_H__
  10 #define __POWERPC_KVM_EXITTIMING_H__
  11
  12 #include <linux/kvm_host.h>
  13
  14 #ifdef CONFIG_KVM_EXIT_TIMING
  15 void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu);
  16 void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu);
  17 void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id);
  18 void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu);
  19
  20 static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type)
  21 {
  22         vcpu->arch.last_exit_type = type;
  23 }
  24
  25 #else
  26 /* if exit timing is not configured there is no need to build the c file */
  27 static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}
  28 static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}
  29 static inline void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu,
  30                                                 unsigned int id) {}
  31 static inline void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
  32 static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type) {}
  33 #endif /* CONFIG_KVM_EXIT_TIMING */
  34
  35 /* account the exit in kvm_stats */
  36 static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)
  37 {
  38         /* type has to be known at build time for optimization */
  39
  40         /* The BUILD_BUG_ON below breaks in funny ways, commented out
  41          * for now ... -BenH
  42         BUILD_BUG_ON(!__builtin_constant_p(type));
  43         */
  44         switch (type) {
  45         case EXT_INTR_EXITS:
  46                 vcpu->stat.ext_intr_exits++;
  47                 break;
  48         case DEC_EXITS:
  49                 vcpu->stat.dec_exits++;
  50                 break;
  51         case EMULATED_INST_EXITS:
  52                 vcpu->stat.emulated_inst_exits++;
  53                 break;
  54         case DSI_EXITS:
  55                 vcpu->stat.dsi_exits++;
  56                 break;
  57         case ISI_EXITS:
  58                 vcpu->stat.isi_exits++;
  59                 break;
  60         case SYSCALL_EXITS:
  61                 vcpu->stat.syscall_exits++;
  62                 break;
  63         case DTLB_REAL_MISS_EXITS:
  64                 vcpu->stat.dtlb_real_miss_exits++;
  65                 break;
  66         case DTLB_VIRT_MISS_EXITS:
  67                 vcpu->stat.dtlb_virt_miss_exits++;
  68                 break;
  69         case MMIO_EXITS:
  70                 vcpu->stat.mmio_exits++;
  71                 break;
  72         case ITLB_REAL_MISS_EXITS:
  73                 vcpu->stat.itlb_real_miss_exits++;
  74                 break;
  75         case ITLB_VIRT_MISS_EXITS:
  76                 vcpu->stat.itlb_virt_miss_exits++;
  77                 break;
  78         case SIGNAL_EXITS:
  79                 vcpu->stat.signal_exits++;
  80                 break;
  81         case DBELL_EXITS:
  82                 vcpu->stat.dbell_exits++;
  83                 break;
  84         case GDBELL_EXITS:
  85                 vcpu->stat.gdbell_exits++;
  86                 break;
  87         }
  88 }
  89
  90 /* wrapper to set exit time and account for it in kvm_stats */
  91 static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)
  92 {
  93         kvmppc_set_exit_type(vcpu, type);
  94         kvmppc_account_exit_stat(vcpu, type);
  95 }
  96
  97 #endif /* __POWERPC_KVM_EXITTIMING_H__ */