150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include <memory.h>
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#include <dwarf-regs.h>
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#include "../kvm-stat.h"
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#include "../parse-events.h"
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#include "../debug.h"
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#include "../evsel.h"
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#include "../evlist.h"
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#include "../pmus.h"
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#define LOONGARCH_EXCEPTION_INT 0
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#define LOONGARCH_EXCEPTION_PIL 1
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#define LOONGARCH_EXCEPTION_PIS 2
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#define LOONGARCH_EXCEPTION_PIF 3
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#define LOONGARCH_EXCEPTION_PME 4
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#define LOONGARCH_EXCEPTION_FPD 15
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#define LOONGARCH_EXCEPTION_SXD 16
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#define LOONGARCH_EXCEPTION_ASXD 17
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#define LOONGARCH_EXCEPTION_GSPR 22
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#define LOONGARCH_EXCEPTION_CPUCFG 100
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#define LOONGARCH_EXCEPTION_CSR 101
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#define LOONGARCH_EXCEPTION_IOCSR 102
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#define LOONGARCH_EXCEPTION_IDLE 103
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#define LOONGARCH_EXCEPTION_OTHERS 104
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#define LOONGARCH_EXCEPTION_HVC 23
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#define loongarch_exception_type \
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{LOONGARCH_EXCEPTION_INT, "Interrupt" }, \
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{LOONGARCH_EXCEPTION_PIL, "Mem Read" }, \
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{LOONGARCH_EXCEPTION_PIS, "Mem Store" }, \
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{LOONGARCH_EXCEPTION_PIF, "Inst Fetch" }, \
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{LOONGARCH_EXCEPTION_PME, "Mem Modify" }, \
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{LOONGARCH_EXCEPTION_FPD, "FPU" }, \
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{LOONGARCH_EXCEPTION_SXD, "LSX" }, \
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{LOONGARCH_EXCEPTION_ASXD, "LASX" }, \
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{LOONGARCH_EXCEPTION_GSPR, "Privilege Error" }, \
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{LOONGARCH_EXCEPTION_HVC, "Hypercall" }, \
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{LOONGARCH_EXCEPTION_CPUCFG, "CPUCFG" }, \
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{LOONGARCH_EXCEPTION_CSR, "CSR" }, \
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{LOONGARCH_EXCEPTION_IOCSR, "IOCSR" }, \
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{LOONGARCH_EXCEPTION_IDLE, "Idle" }, \
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{LOONGARCH_EXCEPTION_OTHERS, "Others" }
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define_exit_reasons_table(loongarch_exit_reasons, loongarch_exception_type);
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static const char *kvm_reenter_trace = "kvm:kvm_reenter";
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static const char * const __kvm_events_tp[] = {
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"kvm:kvm_enter",
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"kvm:kvm_reenter",
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"kvm:kvm_exit",
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"kvm:kvm_exit_gspr",
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NULL,
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};
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static bool event_begin(struct perf_sample *sample, struct event_key *key)
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{
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return exit_event_begin(sample, key);
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}
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static bool event_end(struct perf_sample *sample,
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struct event_key *key __maybe_unused)
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{
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/*
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* LoongArch kvm is different with other architectures
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*
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* There is kvm:kvm_reenter or kvm:kvm_enter event adjacent with
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* kvm:kvm_exit event.
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* kvm:kvm_enter means returning to vmm and then to guest
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* kvm:kvm_reenter means returning to guest immediately
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*/
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return evsel__name_is(sample->evsel, kvm_entry_trace(EM_LOONGARCH)) ||
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evsel__name_is(sample->evsel, kvm_reenter_trace);
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}
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static void event_gspr_get_key(struct perf_sample *sample, struct event_key *key)
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{
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unsigned int insn;
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key->key = LOONGARCH_EXCEPTION_OTHERS;
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insn = perf_sample__intval(sample, "inst_word");
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switch (insn >> 24) {
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case 0:
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/* CPUCFG inst trap */
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if ((insn >> 10) == 0x1b)
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key->key = LOONGARCH_EXCEPTION_CPUCFG;
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break;
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case 4:
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/* CSR inst trap */
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key->key = LOONGARCH_EXCEPTION_CSR;
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break;
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case 6:
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/* IOCSR inst trap */
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if ((insn >> 15) == 0xc90)
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key->key = LOONGARCH_EXCEPTION_IOCSR;
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else if ((insn >> 15) == 0xc91)
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/* Idle inst trap */
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key->key = LOONGARCH_EXCEPTION_IDLE;
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break;
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default:
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key->key = LOONGARCH_EXCEPTION_OTHERS;
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break;
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}
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}
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static const struct child_event_ops child_events[] = {
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{ .name = "kvm:kvm_exit_gspr", .get_key = event_gspr_get_key },
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{ NULL, NULL },
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};
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static const struct kvm_events_ops exit_events = {
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.is_begin_event = event_begin,
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.is_end_event = event_end,
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.child_ops = child_events,
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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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static const struct kvm_reg_events_ops __kvm_reg_events_ops[] = {
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{ .name = "vmexit", .ops = &exit_events, },
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{ NULL, NULL },
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};
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static const char * const __kvm_skip_events[] = {
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NULL,
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};
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int __cpu_isa_init_loongarch(struct perf_kvm_stat *kvm)
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{
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kvm->exit_reasons_isa = "loongarch64";
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kvm->exit_reasons = loongarch_exit_reasons;
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return 0;
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}
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const char * const *__kvm_events_tp_loongarch(void)
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{
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return __kvm_events_tp;
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}
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const struct kvm_reg_events_ops *__kvm_reg_events_ops_loongarch(void)
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{
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return __kvm_reg_events_ops;
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}
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const char * const *__kvm_skip_events_loongarch(void)
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{
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return __kvm_skip_events;
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}
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