140 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <errno.h>3#include <memory.h>4#include "util/kvm-stat.h"5#include "util/parse-events.h"6#include "util/debug.h"7#include "util/evsel.h"8#include "util/evlist.h"9#include "util/pmus.h"10 11#define LOONGARCH_EXCEPTION_INT 012#define LOONGARCH_EXCEPTION_PIL 113#define LOONGARCH_EXCEPTION_PIS 214#define LOONGARCH_EXCEPTION_PIF 315#define LOONGARCH_EXCEPTION_PME 416#define LOONGARCH_EXCEPTION_FPD 1517#define LOONGARCH_EXCEPTION_SXD 1618#define LOONGARCH_EXCEPTION_ASXD 1719#define LOONGARCH_EXCEPTION_GSPR 2220#define LOONGARCH_EXCEPTION_CPUCFG 10021#define LOONGARCH_EXCEPTION_CSR 10122#define LOONGARCH_EXCEPTION_IOCSR 10223#define LOONGARCH_EXCEPTION_IDLE 10324#define LOONGARCH_EXCEPTION_OTHERS 10425#define LOONGARCH_EXCEPTION_HVC 2326 27#define loongarch_exception_type \28 {LOONGARCH_EXCEPTION_INT, "Interrupt" }, \29 {LOONGARCH_EXCEPTION_PIL, "Mem Read" }, \30 {LOONGARCH_EXCEPTION_PIS, "Mem Store" }, \31 {LOONGARCH_EXCEPTION_PIF, "Inst Fetch" }, \32 {LOONGARCH_EXCEPTION_PME, "Mem Modify" }, \33 {LOONGARCH_EXCEPTION_FPD, "FPU" }, \34 {LOONGARCH_EXCEPTION_SXD, "LSX" }, \35 {LOONGARCH_EXCEPTION_ASXD, "LASX" }, \36 {LOONGARCH_EXCEPTION_GSPR, "Privilege Error" }, \37 {LOONGARCH_EXCEPTION_HVC, "Hypercall" }, \38 {LOONGARCH_EXCEPTION_CPUCFG, "CPUCFG" }, \39 {LOONGARCH_EXCEPTION_CSR, "CSR" }, \40 {LOONGARCH_EXCEPTION_IOCSR, "IOCSR" }, \41 {LOONGARCH_EXCEPTION_IDLE, "Idle" }, \42 {LOONGARCH_EXCEPTION_OTHERS, "Others" }43 44define_exit_reasons_table(loongarch_exit_reasons, loongarch_exception_type);45 46const char *vcpu_id_str = "vcpu_id";47const char *kvm_exit_reason = "reason";48const char *kvm_entry_trace = "kvm:kvm_enter";49const char *kvm_reenter_trace = "kvm:kvm_reenter";50const char *kvm_exit_trace = "kvm:kvm_exit";51const char *kvm_events_tp[] = {52 "kvm:kvm_enter",53 "kvm:kvm_reenter",54 "kvm:kvm_exit",55 "kvm:kvm_exit_gspr",56 NULL,57};58 59static bool event_begin(struct evsel *evsel,60 struct perf_sample *sample, struct event_key *key)61{62 return exit_event_begin(evsel, sample, key);63}64 65static bool event_end(struct evsel *evsel,66 struct perf_sample *sample __maybe_unused,67 struct event_key *key __maybe_unused)68{69 /*70 * LoongArch kvm is different with other architectures71 *72 * There is kvm:kvm_reenter or kvm:kvm_enter event adjacent with73 * kvm:kvm_exit event.74 * kvm:kvm_enter means returning to vmm and then to guest75 * kvm:kvm_reenter means returning to guest immediately76 */77 return evsel__name_is(evsel, kvm_entry_trace) || evsel__name_is(evsel, kvm_reenter_trace);78}79 80static void event_gspr_get_key(struct evsel *evsel,81 struct perf_sample *sample, struct event_key *key)82{83 unsigned int insn;84 85 key->key = LOONGARCH_EXCEPTION_OTHERS;86 insn = evsel__intval(evsel, sample, "inst_word");87 88 switch (insn >> 24) {89 case 0:90 /* CPUCFG inst trap */91 if ((insn >> 10) == 0x1b)92 key->key = LOONGARCH_EXCEPTION_CPUCFG;93 break;94 case 4:95 /* CSR inst trap */96 key->key = LOONGARCH_EXCEPTION_CSR;97 break;98 case 6:99 /* IOCSR inst trap */100 if ((insn >> 15) == 0xc90)101 key->key = LOONGARCH_EXCEPTION_IOCSR;102 else if ((insn >> 15) == 0xc91)103 /* Idle inst trap */104 key->key = LOONGARCH_EXCEPTION_IDLE;105 break;106 default:107 key->key = LOONGARCH_EXCEPTION_OTHERS;108 break;109 }110}111 112static struct child_event_ops child_events[] = {113 { .name = "kvm:kvm_exit_gspr", .get_key = event_gspr_get_key },114 { NULL, NULL },115};116 117static struct kvm_events_ops exit_events = {118 .is_begin_event = event_begin,119 .is_end_event = event_end,120 .child_ops = child_events,121 .decode_key = exit_event_decode_key,122 .name = "VM-EXIT"123};124 125struct kvm_reg_events_ops kvm_reg_events_ops[] = {126 { .name = "vmexit", .ops = &exit_events, },127 { NULL, NULL },128};129 130const char * const kvm_skip_events[] = {131 NULL,132};133 134int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused)135{136 kvm->exit_reasons_isa = "loongarch64";137 kvm->exit_reasons = loongarch_exit_reasons;138 return 0;139}140