cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kvm-stat.c (3016B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Arch specific functions for perf kvm stat.
      4 *
      5 * Copyright 2014 IBM Corp.
      6 * Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
      7 */
      8
      9#include <errno.h>
     10#include <string.h>
     11#include "../../util/kvm-stat.h"
     12#include "../../util/evsel.h"
     13#include <asm/sie.h>
     14
     15define_exit_reasons_table(sie_exit_reasons, sie_intercept_code);
     16define_exit_reasons_table(sie_icpt_insn_codes, icpt_insn_codes);
     17define_exit_reasons_table(sie_sigp_order_codes, sigp_order_codes);
     18define_exit_reasons_table(sie_diagnose_codes, diagnose_codes);
     19define_exit_reasons_table(sie_icpt_prog_codes, icpt_prog_codes);
     20
     21const char *vcpu_id_str = "id";
     22const int decode_str_len = 40;
     23const char *kvm_exit_reason = "icptcode";
     24const char *kvm_entry_trace = "kvm:kvm_s390_sie_enter";
     25const char *kvm_exit_trace = "kvm:kvm_s390_sie_exit";
     26
     27static void event_icpt_insn_get_key(struct evsel *evsel,
     28				    struct perf_sample *sample,
     29				    struct event_key *key)
     30{
     31	unsigned long insn;
     32
     33	insn = evsel__intval(evsel, sample, "instruction");
     34	key->key = icpt_insn_decoder(insn);
     35	key->exit_reasons = sie_icpt_insn_codes;
     36}
     37
     38static void event_sigp_get_key(struct evsel *evsel,
     39			       struct perf_sample *sample,
     40			       struct event_key *key)
     41{
     42	key->key = evsel__intval(evsel, sample, "order_code");
     43	key->exit_reasons = sie_sigp_order_codes;
     44}
     45
     46static void event_diag_get_key(struct evsel *evsel,
     47			       struct perf_sample *sample,
     48			       struct event_key *key)
     49{
     50	key->key = evsel__intval(evsel, sample, "code");
     51	key->exit_reasons = sie_diagnose_codes;
     52}
     53
     54static void event_icpt_prog_get_key(struct evsel *evsel,
     55				    struct perf_sample *sample,
     56				    struct event_key *key)
     57{
     58	key->key = evsel__intval(evsel, sample, "code");
     59	key->exit_reasons = sie_icpt_prog_codes;
     60}
     61
     62static struct child_event_ops child_events[] = {
     63	{ .name = "kvm:kvm_s390_intercept_instruction",
     64	  .get_key = event_icpt_insn_get_key },
     65	{ .name = "kvm:kvm_s390_handle_sigp",
     66	  .get_key = event_sigp_get_key },
     67	{ .name = "kvm:kvm_s390_handle_diag",
     68	  .get_key = event_diag_get_key },
     69	{ .name = "kvm:kvm_s390_intercept_prog",
     70	  .get_key = event_icpt_prog_get_key },
     71	{ NULL, NULL },
     72};
     73
     74static struct kvm_events_ops exit_events = {
     75	.is_begin_event = exit_event_begin,
     76	.is_end_event = exit_event_end,
     77	.child_ops = child_events,
     78	.decode_key = exit_event_decode_key,
     79	.name = "VM-EXIT"
     80};
     81
     82const char *kvm_events_tp[] = {
     83	"kvm:kvm_s390_sie_enter",
     84	"kvm:kvm_s390_sie_exit",
     85	"kvm:kvm_s390_intercept_instruction",
     86	"kvm:kvm_s390_handle_sigp",
     87	"kvm:kvm_s390_handle_diag",
     88	"kvm:kvm_s390_intercept_prog",
     89	NULL,
     90};
     91
     92struct kvm_reg_events_ops kvm_reg_events_ops[] = {
     93	{ .name = "vmexit", .ops = &exit_events },
     94	{ NULL, NULL },
     95};
     96
     97const char * const kvm_skip_events[] = {
     98	"Wait state",
     99	NULL,
    100};
    101
    102int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
    103{
    104	if (strstr(cpuid, "IBM")) {
    105		kvm->exit_reasons = sie_exit_reasons;
    106		kvm->exit_reasons_isa = "SIE";
    107	} else
    108		return -ENOTSUP;
    109
    110	return 0;
    111}