Merge branch 'kvm-updates/2.6.31' of git://git.kernel.org/pub/scm/virt/kvm/kvm
[linux-2.6] / 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         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 */
96 static 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__ */