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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 <[email protected]>
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  case DBELL_EXITS:
97  vcpu->stat.dbell_exits++;
98  break;
99  case GDBELL_EXITS:
100  vcpu->stat.gdbell_exits++;
101  break;
102  }
103 }
104 
105 /* wrapper to set exit time and account for it in kvm_stats */
106 static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)
107 {
108  kvmppc_set_exit_type(vcpu, type);
109  kvmppc_account_exit_stat(vcpu, type);
110 }
111 
112 #endif /* __POWERPC_KVM_EXITTIMING_H__ */
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