linux/arch/powerpc/kvm/timing.h
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   1/*
   2 * This program is free software; you can redistribute it and/or modify
   3 * it under the terms of the GNU General Public License, version 2, as
   4 * published by the Free Software Foundation.
   5 *
   6 * This program is distributed in the hope that it will be useful,
   7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 * GNU General Public License for more details.
  10 *
  11 * You should have received a copy of the GNU General Public License
  12 * along with this program; if not, write to the Free Software
  13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14 *
  15 * Copyright IBM Corp. 2008
  16 *
  17 * Authors: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  18 */
  19
  20#ifndef __POWERPC_KVM_EXITTIMING_H__
  21#define __POWERPC_KVM_EXITTIMING_H__
  22
  23#include <linux/kvm_host.h>
  24#include <asm/kvm_host.h>
  25
  26#ifdef CONFIG_KVM_EXIT_TIMING
  27void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu);
  28void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu);
  29void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id);
  30void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu);
  31
  32static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type)
  33{
  34        vcpu->arch.last_exit_type = type;
  35}
  36
  37#else
  38/* if exit timing is not configured there is no need to build the c file */
  39static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}
  40static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}
  41static inline void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu,
  42                                                unsigned int id) {}
  43static inline void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
  44static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type) {}
  45#endif /* CONFIG_KVM_EXIT_TIMING */
  46
  47/* account the exit in kvm_stats */
  48static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)
  49{
  50        /* type has to be known at build time for optimization */
  51        BUILD_BUG_ON(__builtin_constant_p(type));
  52        switch (type) {
  53        case EXT_INTR_EXITS:
  54                vcpu->stat.ext_intr_exits++;
  55                break;
  56        case DEC_EXITS:
  57                vcpu->stat.dec_exits++;
  58                break;
  59        case EMULATED_INST_EXITS:
  60                vcpu->stat.emulated_inst_exits++;
  61                break;
  62        case DCR_EXITS:
  63                vcpu->stat.dcr_exits++;
  64                break;
  65        case DSI_EXITS:
  66                vcpu->stat.dsi_exits++;
  67                break;
  68        case ISI_EXITS:
  69                vcpu->stat.isi_exits++;
  70                break;
  71        case SYSCALL_EXITS:
  72                vcpu->stat.syscall_exits++;
  73                break;
  74        case DTLB_REAL_MISS_EXITS:
  75                vcpu->stat.dtlb_real_miss_exits++;
  76                break;
  77        case DTLB_VIRT_MISS_EXITS:
  78                vcpu->stat.dtlb_virt_miss_exits++;
  79                break;
  80        case MMIO_EXITS:
  81                vcpu->stat.mmio_exits++;
  82                break;
  83        case ITLB_REAL_MISS_EXITS:
  84                vcpu->stat.itlb_real_miss_exits++;
  85                break;
  86        case ITLB_VIRT_MISS_EXITS:
  87                vcpu->stat.itlb_virt_miss_exits++;
  88                break;
  89        case SIGNAL_EXITS:
  90                vcpu->stat.signal_exits++;
  91                break;
  92        }
  93}
  94
  95/* wrapper to set exit time and account for it in kvm_stats */
  96static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)
  97{
  98        kvmppc_set_exit_type(vcpu, type);
  99        kvmppc_account_exit_stat(vcpu, type);
 100}
 101
 102#endif /* __POWERPC_KVM_EXITTIMING_H__ */
 103