LXR linux/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
  15void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu);
  16void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu);
  17void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id);
  18void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu);
  19
  20static 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 */
  27static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}
  28static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}
  29static inline void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu,
  30                                                unsigned int id) {}
  31static inline void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
  32static 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 */
  36static 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 */
  91static 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__ */
  98