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 
kvmppc_set_exit_type(struct kvm_vcpu * vcpu,int type)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 */
kvmppc_init_timing_stats(struct kvm_vcpu * vcpu)39 static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}
kvmppc_update_timing_stats(struct kvm_vcpu * vcpu)40 static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}
kvmppc_create_vcpu_debugfs(struct kvm_vcpu * vcpu,unsigned int id)41 static inline void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu,
42 						unsigned int id) {}
kvmppc_remove_vcpu_debugfs(struct kvm_vcpu * vcpu)43 static inline void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
kvmppc_set_exit_type(struct kvm_vcpu * vcpu,int type)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 */
kvmppc_account_exit_stat(struct kvm_vcpu * vcpu,int type)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 */
kvmppc_account_exit(struct kvm_vcpu * vcpu,int type)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__ */
107