release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/kvm/timing.h

   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
  27 void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu);
  28 void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu);
  29 void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id);
  30 void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu);
  31
  32 static 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 */
  39 static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}
  40 static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}
  41 static inline void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu,
  42                                                 unsigned int id) {}
  43 static inline void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
  44 static 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 */
  48 static 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
  52         /* The BUILD_BUG_ON below breaks in funny ways, commented out
  53          * for now ... -BenH
  54         BUILD_BUG_ON(!__builtin_constant_p(type));
  55         */
  56         switch (type) {
  57         case EXT_INTR_EXITS:
  58                 vcpu->stat.ext_intr_exits++;
  59                 break;
  60         case DEC_EXITS:
  61                 vcpu->stat.dec_exits++;
  62                 break;
  63         case EMULATED_INST_EXITS:
  64                 vcpu->stat.emulated_inst_exits++;
  65                 break;
  66         case DCR_EXITS:
  67                 vcpu->stat.dcr_exits++;
  68                 break;
  69         case DSI_EXITS:
  70                 vcpu->stat.dsi_exits++;
  71                 break;
  72         case ISI_EXITS:
  73                 vcpu->stat.isi_exits++;
  74                 break;
  75         case SYSCALL_EXITS:
  76                 vcpu->stat.syscall_exits++;
  77                 break;
  78         case DTLB_REAL_MISS_EXITS:
  79                 vcpu->stat.dtlb_real_miss_exits++;
  80                 break;
  81         case DTLB_VIRT_MISS_EXITS:
  82                 vcpu->stat.dtlb_virt_miss_exits++;
  83                 break;
  84         case MMIO_EXITS:
  85                 vcpu->stat.mmio_exits++;
  86                 break;
  87         case ITLB_REAL_MISS_EXITS:
  88                 vcpu->stat.itlb_real_miss_exits++;
  89                 break;
  90         case ITLB_VIRT_MISS_EXITS:
  91                 vcpu->stat.itlb_virt_miss_exits++;
  92                 break;
  93         case SIGNAL_EXITS:
  94                 vcpu->stat.signal_exits++;
  95                 break;
  96         }
  97 }
  98
  99 /* wrapper to set exit time and account for it in kvm_stats */
 100 static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)
 101 {
 102         kvmppc_set_exit_type(vcpu, type);
 103         kvmppc_account_exit_stat(vcpu, type);
 104 }
 105
 106 #endif /* __POWERPC_KVM_EXITTIMING_H__ */