xref: /openbmc/linux/arch/powerpc/kvm/timing.h (revision faf01aef)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *
4  * Copyright IBM Corp. 2008
5  *
6  * Authors: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
7  */
8 
9 #ifndef __POWERPC_KVM_EXITTIMING_H__
10 #define __POWERPC_KVM_EXITTIMING_H__
11 
12 #include <linux/kvm_host.h>
13 
14 #ifdef CONFIG_KVM_EXIT_TIMING
15 void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu);
16 void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu);
17 int kvmppc_create_vcpu_debugfs_e500(struct kvm_vcpu *vcpu,
18 				    struct dentry *debugfs_dentry);
19 
kvmppc_set_exit_type(struct kvm_vcpu * vcpu,int type)20 static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type)
21 {
22 	vcpu->arch.last_exit_type = type;
23 }
24 
25 #else
26 /* if exit timing is not configured there is no need to build the c file */
kvmppc_init_timing_stats(struct kvm_vcpu * vcpu)27 static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}
kvmppc_update_timing_stats(struct kvm_vcpu * vcpu)28 static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}
kvmppc_create_vcpu_debugfs_e500(struct kvm_vcpu * vcpu,struct dentry * debugfs_dentry)29 static inline int kvmppc_create_vcpu_debugfs_e500(struct kvm_vcpu *vcpu,
30 						  struct dentry *debugfs_dentry)
31 {
32 	return 0;
33 }
kvmppc_set_exit_type(struct kvm_vcpu * vcpu,int type)34 static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type) {}
35 #endif /* CONFIG_KVM_EXIT_TIMING */
36 
37 /* account the exit in kvm_stats */
kvmppc_account_exit_stat(struct kvm_vcpu * vcpu,int type)38 static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)
39 {
40 	/* type has to be known at build time for optimization */
41 
42 	/* The BUILD_BUG_ON below breaks in funny ways, commented out
43 	 * for now ... -BenH
44 	BUILD_BUG_ON(!__builtin_constant_p(type));
45 	*/
46 	switch (type) {
47 	case EXT_INTR_EXITS:
48 		vcpu->stat.ext_intr_exits++;
49 		break;
50 	case DEC_EXITS:
51 		vcpu->stat.dec_exits++;
52 		break;
53 	case EMULATED_INST_EXITS:
54 		vcpu->stat.emulated_inst_exits++;
55 		break;
56 	case DSI_EXITS:
57 		vcpu->stat.dsi_exits++;
58 		break;
59 	case ISI_EXITS:
60 		vcpu->stat.isi_exits++;
61 		break;
62 	case SYSCALL_EXITS:
63 		vcpu->stat.syscall_exits++;
64 		break;
65 	case DTLB_REAL_MISS_EXITS:
66 		vcpu->stat.dtlb_real_miss_exits++;
67 		break;
68 	case DTLB_VIRT_MISS_EXITS:
69 		vcpu->stat.dtlb_virt_miss_exits++;
70 		break;
71 	case MMIO_EXITS:
72 		vcpu->stat.mmio_exits++;
73 		break;
74 	case ITLB_REAL_MISS_EXITS:
75 		vcpu->stat.itlb_real_miss_exits++;
76 		break;
77 	case ITLB_VIRT_MISS_EXITS:
78 		vcpu->stat.itlb_virt_miss_exits++;
79 		break;
80 	case SIGNAL_EXITS:
81 		vcpu->stat.signal_exits++;
82 		break;
83 	case DBELL_EXITS:
84 		vcpu->stat.dbell_exits++;
85 		break;
86 	case GDBELL_EXITS:
87 		vcpu->stat.gdbell_exits++;
88 		break;
89 	}
90 }
91 
92 /* wrapper to set exit time and account for it in kvm_stats */
kvmppc_account_exit(struct kvm_vcpu * vcpu,int type)93 static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)
94 {
95 	kvmppc_set_exit_type(vcpu, type);
96 	kvmppc_account_exit_stat(vcpu, type);
97 }
98 
99 #endif /* __POWERPC_KVM_EXITTIMING_H__ */
100