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 <[email protected]>
   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 int kvmppc_create_vcpu_debugfs_e500(struct kvm_vcpu *vcpu,
  18                                     struct dentry *debugfs_dentry);
  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 int kvmppc_create_vcpu_debugfs_e500(struct kvm_vcpu *vcpu,
  30                                                   struct dentry *debugfs_dentry)
  31 {
  32         return 0;
  33 }
  34 static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type) {}
  35 #endif /* CONFIG_KVM_EXIT_TIMING */
  36
  37 /* account the exit in kvm_stats */
  38 static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)
  39 {
  40         /* type has to be known at build time for optimization */
  41
  42         /* The BUILD_BUG_ON below breaks in funny ways, commented out
  43          * for now ... -BenH
  44         BUILD_BUG_ON(!__builtin_constant_p(type));
  45         */
  46         switch (type) {
  47         case EXT_INTR_EXITS:
  48                 vcpu->stat.ext_intr_exits++;
  49                 break;
  50         case DEC_EXITS:
  51                 vcpu->stat.dec_exits++;
  52                 break;
  53         case EMULATED_INST_EXITS:
  54                 vcpu->stat.emulated_inst_exits++;
  55                 break;
  56         case DSI_EXITS:
  57                 vcpu->stat.dsi_exits++;
  58                 break;
  59         case ISI_EXITS:
  60                 vcpu->stat.isi_exits++;
  61                 break;
  62         case SYSCALL_EXITS:
  63                 vcpu->stat.syscall_exits++;
  64                 break;
  65         case DTLB_REAL_MISS_EXITS:
  66                 vcpu->stat.dtlb_real_miss_exits++;
  67                 break;
  68         case DTLB_VIRT_MISS_EXITS:
  69                 vcpu->stat.dtlb_virt_miss_exits++;
  70                 break;
  71         case MMIO_EXITS:
  72                 vcpu->stat.mmio_exits++;
  73                 break;
  74         case ITLB_REAL_MISS_EXITS:
  75                 vcpu->stat.itlb_real_miss_exits++;
  76                 break;
  77         case ITLB_VIRT_MISS_EXITS:
  78                 vcpu->stat.itlb_virt_miss_exits++;
  79                 break;
  80         case SIGNAL_EXITS:
  81                 vcpu->stat.signal_exits++;
  82                 break;
  83         case DBELL_EXITS:
  84                 vcpu->stat.dbell_exits++;
  85                 break;
  86         case GDBELL_EXITS:
  87                 vcpu->stat.gdbell_exits++;
  88                 break;
  89         }
  90 }
  91
  92 /* wrapper to set exit time and account for it in kvm_stats */
  93 static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)
  94 {
  95         kvmppc_set_exit_type(vcpu, type);
  96         kvmppc_account_exit_stat(vcpu, type);
  97 }
  98
  99 #endif /* __POWERPC_KVM_EXITTIMING_H__ */