115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Arch specific functions for perf kvm stat.
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* Copyright(c) 2019 Huawei Technologies Co., Ltd
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*/
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#include <string.h>
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#include "../../../util/debug.h"
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#include "../../../util/evsel.h"
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#include "../../../util/kvm-stat.h"
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#include "aarch64_guest_exits.h"
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define_exit_reasons_table(arm64_exit_reasons, kvm_arm_exception_type);
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define_exit_reasons_table(arm64_trap_reasons, kvm_arm_exception_class);
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static struct kvm_events_ops exit_events = {
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.is_begin_event = exit_event_begin,
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.is_end_event = exit_event_end,
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.decode_key = exit_event_decode_key,
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.name = "VM-EXIT"
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};
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const char *vcpu_id_str = "vcpu_id";
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const int decode_str_len = 20;
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const char *kvm_exit_reason = "ret";
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const char *kvm_entry_trace = "kvm:kvm_entry";
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const char *kvm_exit_trace = "kvm:kvm_exit";
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const char *kvm_trap_reason = "esr_ec";
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const char *kvm_trap_enter_trace = "kvm:kvm_trap_enter";
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const char *kvm_trap_exit_trace = "kvm:kvm_trap_exit";
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static void trap_event_get_key(struct evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key)
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{
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key->info = 0;
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key->key = evsel__intval(evsel, sample, kvm_trap_reason);
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}
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static const char *get_trap_reason(u64 exit_code)
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{
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struct exit_reasons_table *tbl = arm64_trap_reasons;
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while (tbl->reason != NULL) {
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if (tbl->exit_code == exit_code)
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return tbl->reason;
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tbl++;
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}
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pr_err("Unknown kvm trap exit code: %lld on aarch64\n",
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(unsigned long long)exit_code);
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return "UNKNOWN";
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}
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static bool trap_event_end(struct evsel *evsel,
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struct perf_sample *sample __maybe_unused,
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struct event_key *key __maybe_unused)
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{
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return (!strcmp(evsel->name, kvm_trap_exit_trace));
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}
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static bool trap_event_begin(struct evsel *evsel,
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struct perf_sample *sample, struct event_key *key)
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{
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if (!strcmp(evsel->name, kvm_trap_enter_trace)) {
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trap_event_get_key(evsel, sample, key);
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return true;
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}
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return false;
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}
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static void trap_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
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struct event_key *key,
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char *decode)
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{
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const char *trap_reason = get_trap_reason(key->key);
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scnprintf(decode, decode_str_len, "%s", trap_reason);
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}
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static struct kvm_events_ops trap_events = {
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.is_begin_event = trap_event_begin,
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.is_end_event = trap_event_end,
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.decode_key = trap_event_decode_key,
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.name = "TRAP-EVENT",
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};
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const char *kvm_events_tp[] = {
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"kvm:kvm_entry",
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"kvm:kvm_exit",
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"kvm:kvm_trap_enter",
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"kvm:kvm_trap_exit",
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NULL,
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};
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struct kvm_reg_events_ops kvm_reg_events_ops[] = {
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{ .name = "vmexit", .ops = &exit_events },
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{ .name = "trap", .ops = &trap_events },
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{ NULL, NULL },
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};
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const char * const kvm_skip_events[] = {
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NULL,
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};
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int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused)
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{
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kvm->exit_reasons = arm64_exit_reasons;
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kvm->exit_reasons_isa = "aarch64";
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return 0;
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}
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