1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <memory.h> 4 #include "../../../util/evsel.h" 5 #include "../../../util/kvm-stat.h" 6 #include "arm64_exception_types.h" 7 #include "debug.h" 8 9 define_exit_reasons_table(arm64_exit_reasons, kvm_arm_exception_type); 10 define_exit_reasons_table(arm64_trap_exit_reasons, kvm_arm_exception_class); 11 12 const char *kvm_trap_exit_reason = "esr_ec"; 13 const char *vcpu_id_str = "id"; 14 const int decode_str_len = 20; 15 const char *kvm_exit_reason = "ret"; 16 const char *kvm_entry_trace = "kvm:kvm_entry"; 17 const char *kvm_exit_trace = "kvm:kvm_exit"; 18 19 const char *kvm_events_tp[] = { 20 "kvm:kvm_entry", 21 "kvm:kvm_exit", 22 NULL, 23 }; 24 25 static void event_get_key(struct evsel *evsel, 26 struct perf_sample *sample, 27 struct event_key *key) 28 { 29 key->info = 0; 30 key->key = evsel__intval(evsel, sample, kvm_exit_reason); 31 key->exit_reasons = arm64_exit_reasons; 32 33 /* 34 * TRAP exceptions carry exception class info in esr_ec field 35 * and, hence, we need to use a different exit_reasons table to 36 * properly decode event's est_ec. 37 */ 38 if (key->key == ARM_EXCEPTION_TRAP) { 39 key->key = evsel__intval(evsel, sample, kvm_trap_exit_reason); 40 key->exit_reasons = arm64_trap_exit_reasons; 41 } 42 } 43 44 static bool event_begin(struct evsel *evsel, 45 struct perf_sample *sample __maybe_unused, 46 struct event_key *key __maybe_unused) 47 { 48 return !strcmp(evsel->name, kvm_entry_trace); 49 } 50 51 static bool event_end(struct evsel *evsel, 52 struct perf_sample *sample, 53 struct event_key *key) 54 { 55 if (!strcmp(evsel->name, kvm_exit_trace)) { 56 event_get_key(evsel, sample, key); 57 return true; 58 } 59 return false; 60 } 61 62 static struct kvm_events_ops exit_events = { 63 .is_begin_event = event_begin, 64 .is_end_event = event_end, 65 .decode_key = exit_event_decode_key, 66 .name = "VM-EXIT" 67 }; 68 69 struct kvm_reg_events_ops kvm_reg_events_ops[] = { 70 { 71 .name = "vmexit", 72 .ops = &exit_events, 73 }, 74 { NULL, NULL }, 75 }; 76 77 const char * const kvm_skip_events[] = { 78 NULL, 79 }; 80 81 int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused) 82 { 83 kvm->exit_reasons_isa = "arm64"; 84 return 0; 85 } 86