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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: Fix loss of notification with multi-event perf, x86: Force IBS LVT offset assignment for family 10h perf, x86: Disable PEBS on SandyBridge chips trace_events_filter: Use rcu_assign_pointer() when setting ftrace_event_call->filter perf session: Fix crash with invalid CPU list perf python: Fix undefined symbol problem perf/x86: Enable raw event access to Intel offcore events perf: Don't use -ENOSPC for out of PMU resources perf: Do not set task_ctx pointer in cpuctx if there are no events in the context perf/x86: Fix PEBS instruction unwind oprofile, x86: Fix crash when unloading module (nmi timer mode) oprofile: Fix crash when unloading module (hr timer mode)
This commit is contained in:
commit
232ea34455
@ -353,15 +353,15 @@ validate_group(struct perf_event *event)
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fake_pmu.used_mask = fake_used_mask;
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if (!validate_event(&fake_pmu, leader))
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return -ENOSPC;
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return -EINVAL;
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list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
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if (!validate_event(&fake_pmu, sibling))
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return -ENOSPC;
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return -EINVAL;
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}
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if (!validate_event(&fake_pmu, event))
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return -ENOSPC;
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return -EINVAL;
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return 0;
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}
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@ -623,7 +623,7 @@ static int mipspmu_event_init(struct perf_event *event)
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if (!atomic_inc_not_zero(&active_events)) {
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if (atomic_read(&active_events) > MIPS_MAX_HWEVENTS) {
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atomic_dec(&active_events);
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return -ENOSPC;
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return -EINVAL;
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}
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mutex_lock(&pmu_reserve_mutex);
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@ -732,15 +732,15 @@ static int validate_group(struct perf_event *event)
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memset(&fake_cpuc, 0, sizeof(fake_cpuc));
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if (!validate_event(&fake_cpuc, leader))
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return -ENOSPC;
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return -EINVAL;
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list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
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if (!validate_event(&fake_cpuc, sibling))
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return -ENOSPC;
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return -EINVAL;
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}
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if (!validate_event(&fake_cpuc, event))
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return -ENOSPC;
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return -EINVAL;
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return 0;
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}
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@ -312,12 +312,8 @@ int x86_setup_perfctr(struct perf_event *event)
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return -EOPNOTSUPP;
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}
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/*
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* Do not allow config1 (extended registers) to propagate,
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* there's no sane user-space generalization yet:
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*/
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if (attr->type == PERF_TYPE_RAW)
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return 0;
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return x86_pmu_extra_regs(event->attr.config, event);
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if (attr->type == PERF_TYPE_HW_CACHE)
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return set_ext_hw_attr(hwc, event);
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@ -588,7 +584,7 @@ done:
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x86_pmu.put_event_constraints(cpuc, cpuc->event_list[i]);
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}
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}
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return num ? -ENOSPC : 0;
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return num ? -EINVAL : 0;
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}
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/*
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@ -607,7 +603,7 @@ static int collect_events(struct cpu_hw_events *cpuc, struct perf_event *leader,
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if (is_x86_event(leader)) {
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if (n >= max_count)
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return -ENOSPC;
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return -EINVAL;
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cpuc->event_list[n] = leader;
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n++;
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}
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@ -620,7 +616,7 @@ static int collect_events(struct cpu_hw_events *cpuc, struct perf_event *leader,
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continue;
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if (n >= max_count)
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return -ENOSPC;
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return -EINVAL;
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cpuc->event_list[n] = event;
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n++;
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@ -1316,7 +1312,7 @@ static int validate_event(struct perf_event *event)
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c = x86_pmu.get_event_constraints(fake_cpuc, event);
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if (!c || !c->weight)
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ret = -ENOSPC;
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ret = -EINVAL;
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if (x86_pmu.put_event_constraints)
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x86_pmu.put_event_constraints(fake_cpuc, event);
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@ -1341,7 +1337,7 @@ static int validate_group(struct perf_event *event)
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{
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struct perf_event *leader = event->group_leader;
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struct cpu_hw_events *fake_cpuc;
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int ret = -ENOSPC, n;
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int ret = -EINVAL, n;
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fake_cpuc = allocate_fake_cpuc();
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if (IS_ERR(fake_cpuc))
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@ -199,8 +199,7 @@ static int force_ibs_eilvt_setup(void)
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goto out;
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}
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pr_err(FW_BUG "using offset %d for IBS interrupts\n", offset);
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pr_err(FW_BUG "workaround enabled for IBS LVT offset\n");
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pr_info("IBS: LVT offset %d assigned\n", offset);
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return 0;
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out:
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@ -265,19 +264,23 @@ perf_ibs_cpu_notifier(struct notifier_block *self, unsigned long action, void *h
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static __init int amd_ibs_init(void)
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{
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u32 caps;
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int ret;
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int ret = -EINVAL;
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caps = __get_ibs_caps();
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if (!caps)
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return -ENODEV; /* ibs not supported by the cpu */
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if (!ibs_eilvt_valid()) {
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ret = force_ibs_eilvt_setup();
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if (ret) {
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pr_err("Failed to setup IBS, %d\n", ret);
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return ret;
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}
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}
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/*
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* Force LVT offset assignment for family 10h: The offsets are
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* not assigned by the BIOS for this family, so the OS is
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* responsible for doing it. If the OS assignment fails, fall
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* back to BIOS settings and try to setup this.
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*/
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if (boot_cpu_data.x86 == 0x10)
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force_ibs_eilvt_setup();
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if (!ibs_eilvt_valid())
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goto out;
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get_online_cpus();
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ibs_caps = caps;
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@ -287,7 +290,11 @@ static __init int amd_ibs_init(void)
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smp_call_function(setup_APIC_ibs, NULL, 1);
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put_online_cpus();
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return perf_event_ibs_init();
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ret = perf_event_ibs_init();
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out:
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if (ret)
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pr_err("Failed to setup IBS, %d\n", ret);
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return ret;
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}
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/* Since we need the pci subsystem to init ibs we can't do this earlier: */
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@ -1545,6 +1545,13 @@ static void intel_clovertown_quirks(void)
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x86_pmu.pebs_constraints = NULL;
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}
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static void intel_sandybridge_quirks(void)
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{
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printk(KERN_WARNING "PEBS disabled due to CPU errata.\n");
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x86_pmu.pebs = 0;
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x86_pmu.pebs_constraints = NULL;
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}
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__init int intel_pmu_init(void)
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{
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union cpuid10_edx edx;
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@ -1694,6 +1701,7 @@ __init int intel_pmu_init(void)
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break;
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case 42: /* SandyBridge */
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x86_pmu.quirks = intel_sandybridge_quirks;
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case 45: /* SandyBridge, "Romely-EP" */
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memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
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sizeof(hw_cache_event_ids));
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@ -493,6 +493,7 @@ static int intel_pmu_pebs_fixup_ip(struct pt_regs *regs)
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unsigned long from = cpuc->lbr_entries[0].from;
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unsigned long old_to, to = cpuc->lbr_entries[0].to;
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unsigned long ip = regs->ip;
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int is_64bit = 0;
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/*
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* We don't need to fixup if the PEBS assist is fault like
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@ -544,7 +545,10 @@ static int intel_pmu_pebs_fixup_ip(struct pt_regs *regs)
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} else
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kaddr = (void *)to;
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kernel_insn_init(&insn, kaddr);
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#ifdef CONFIG_X86_64
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is_64bit = kernel_ip(to) || !test_thread_flag(TIF_IA32);
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#endif
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insn_init(&insn, kaddr, is_64bit);
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insn_get_length(&insn);
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to += insn.length;
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} while (to < ip);
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@ -1268,7 +1268,7 @@ reserve:
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}
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done:
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return num ? -ENOSPC : 0;
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return num ? -EINVAL : 0;
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}
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static __initconst const struct x86_pmu p4_pmu = {
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@ -21,6 +21,7 @@ extern int op_nmi_timer_init(struct oprofile_operations *ops);
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extern void op_nmi_exit(void);
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extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
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static int nmi_timer;
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int __init oprofile_arch_init(struct oprofile_operations *ops)
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{
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@ -31,8 +32,9 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
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#ifdef CONFIG_X86_LOCAL_APIC
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ret = op_nmi_init(ops);
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#endif
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nmi_timer = (ret != 0);
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#ifdef CONFIG_X86_IO_APIC
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if (ret < 0)
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if (nmi_timer)
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ret = op_nmi_timer_init(ops);
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#endif
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ops->backtrace = x86_backtrace;
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@ -44,6 +46,7 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
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void oprofile_arch_exit(void)
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{
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#ifdef CONFIG_X86_LOCAL_APIC
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op_nmi_exit();
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if (!nmi_timer)
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op_nmi_exit();
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#endif
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}
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@ -239,26 +239,45 @@ int oprofile_set_ulong(unsigned long *addr, unsigned long val)
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return err;
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}
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static int timer_mode;
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static int __init oprofile_init(void)
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{
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int err;
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/* always init architecture to setup backtrace support */
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err = oprofile_arch_init(&oprofile_ops);
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if (err < 0 || timer) {
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printk(KERN_INFO "oprofile: using timer interrupt.\n");
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timer_mode = err || timer; /* fall back to timer mode on errors */
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if (timer_mode) {
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if (!err)
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oprofile_arch_exit();
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err = oprofile_timer_init(&oprofile_ops);
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if (err)
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return err;
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}
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return oprofilefs_register();
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err = oprofilefs_register();
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if (!err)
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return 0;
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/* failed */
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if (timer_mode)
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oprofile_timer_exit();
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else
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oprofile_arch_exit();
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return err;
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}
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static void __exit oprofile_exit(void)
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{
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oprofile_timer_exit();
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oprofilefs_unregister();
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oprofile_arch_exit();
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if (timer_mode)
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oprofile_timer_exit();
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else
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oprofile_arch_exit();
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}
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@ -110,6 +110,7 @@ int oprofile_timer_init(struct oprofile_operations *ops)
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ops->start = oprofile_hrtimer_start;
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ops->stop = oprofile_hrtimer_stop;
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ops->cpu_type = "timer";
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printk(KERN_INFO "oprofile: using timer interrupt.\n");
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return 0;
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}
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|
@ -822,6 +822,7 @@ struct perf_event {
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int mmap_locked;
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struct user_struct *mmap_user;
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struct ring_buffer *rb;
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struct list_head rb_entry;
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/* poll related */
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wait_queue_head_t waitq;
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|
@ -185,6 +185,9 @@ static void cpu_ctx_sched_in(struct perf_cpu_context *cpuctx,
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static void update_context_time(struct perf_event_context *ctx);
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static u64 perf_event_time(struct perf_event *event);
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static void ring_buffer_attach(struct perf_event *event,
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struct ring_buffer *rb);
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|
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void __weak perf_event_print_debug(void) { }
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||||
extern __weak const char *perf_pmu_name(void)
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@ -2173,7 +2176,8 @@ static void perf_event_context_sched_in(struct perf_event_context *ctx,
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perf_event_sched_in(cpuctx, ctx, task);
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||||
cpuctx->task_ctx = ctx;
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if (ctx->nr_events)
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cpuctx->task_ctx = ctx;
|
||||
|
||||
perf_pmu_enable(ctx->pmu);
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||||
perf_ctx_unlock(cpuctx, ctx);
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@ -3190,12 +3194,33 @@ static unsigned int perf_poll(struct file *file, poll_table *wait)
|
||||
struct ring_buffer *rb;
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||||
unsigned int events = POLL_HUP;
|
||||
|
||||
/*
|
||||
* Race between perf_event_set_output() and perf_poll(): perf_poll()
|
||||
* grabs the rb reference but perf_event_set_output() overrides it.
|
||||
* Here is the timeline for two threads T1, T2:
|
||||
* t0: T1, rb = rcu_dereference(event->rb)
|
||||
* t1: T2, old_rb = event->rb
|
||||
* t2: T2, event->rb = new rb
|
||||
* t3: T2, ring_buffer_detach(old_rb)
|
||||
* t4: T1, ring_buffer_attach(rb1)
|
||||
* t5: T1, poll_wait(event->waitq)
|
||||
*
|
||||
* To avoid this problem, we grab mmap_mutex in perf_poll()
|
||||
* thereby ensuring that the assignment of the new ring buffer
|
||||
* and the detachment of the old buffer appear atomic to perf_poll()
|
||||
*/
|
||||
mutex_lock(&event->mmap_mutex);
|
||||
|
||||
rcu_read_lock();
|
||||
rb = rcu_dereference(event->rb);
|
||||
if (rb)
|
||||
if (rb) {
|
||||
ring_buffer_attach(event, rb);
|
||||
events = atomic_xchg(&rb->poll, 0);
|
||||
}
|
||||
rcu_read_unlock();
|
||||
|
||||
mutex_unlock(&event->mmap_mutex);
|
||||
|
||||
poll_wait(file, &event->waitq, wait);
|
||||
|
||||
return events;
|
||||
@ -3496,6 +3521,49 @@ unlock:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void ring_buffer_attach(struct perf_event *event,
|
||||
struct ring_buffer *rb)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
if (!list_empty(&event->rb_entry))
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&rb->event_lock, flags);
|
||||
if (!list_empty(&event->rb_entry))
|
||||
goto unlock;
|
||||
|
||||
list_add(&event->rb_entry, &rb->event_list);
|
||||
unlock:
|
||||
spin_unlock_irqrestore(&rb->event_lock, flags);
|
||||
}
|
||||
|
||||
static void ring_buffer_detach(struct perf_event *event,
|
||||
struct ring_buffer *rb)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
if (list_empty(&event->rb_entry))
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&rb->event_lock, flags);
|
||||
list_del_init(&event->rb_entry);
|
||||
wake_up_all(&event->waitq);
|
||||
spin_unlock_irqrestore(&rb->event_lock, flags);
|
||||
}
|
||||
|
||||
static void ring_buffer_wakeup(struct perf_event *event)
|
||||
{
|
||||
struct ring_buffer *rb;
|
||||
|
||||
rcu_read_lock();
|
||||
rb = rcu_dereference(event->rb);
|
||||
list_for_each_entry_rcu(event, &rb->event_list, rb_entry) {
|
||||
wake_up_all(&event->waitq);
|
||||
}
|
||||
rcu_read_unlock();
|
||||
}
|
||||
|
||||
static void rb_free_rcu(struct rcu_head *rcu_head)
|
||||
{
|
||||
struct ring_buffer *rb;
|
||||
@ -3521,9 +3589,19 @@ static struct ring_buffer *ring_buffer_get(struct perf_event *event)
|
||||
|
||||
static void ring_buffer_put(struct ring_buffer *rb)
|
||||
{
|
||||
struct perf_event *event, *n;
|
||||
unsigned long flags;
|
||||
|
||||
if (!atomic_dec_and_test(&rb->refcount))
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&rb->event_lock, flags);
|
||||
list_for_each_entry_safe(event, n, &rb->event_list, rb_entry) {
|
||||
list_del_init(&event->rb_entry);
|
||||
wake_up_all(&event->waitq);
|
||||
}
|
||||
spin_unlock_irqrestore(&rb->event_lock, flags);
|
||||
|
||||
call_rcu(&rb->rcu_head, rb_free_rcu);
|
||||
}
|
||||
|
||||
@ -3546,6 +3624,7 @@ static void perf_mmap_close(struct vm_area_struct *vma)
|
||||
atomic_long_sub((size >> PAGE_SHIFT) + 1, &user->locked_vm);
|
||||
vma->vm_mm->pinned_vm -= event->mmap_locked;
|
||||
rcu_assign_pointer(event->rb, NULL);
|
||||
ring_buffer_detach(event, rb);
|
||||
mutex_unlock(&event->mmap_mutex);
|
||||
|
||||
ring_buffer_put(rb);
|
||||
@ -3700,7 +3779,7 @@ static const struct file_operations perf_fops = {
|
||||
|
||||
void perf_event_wakeup(struct perf_event *event)
|
||||
{
|
||||
wake_up_all(&event->waitq);
|
||||
ring_buffer_wakeup(event);
|
||||
|
||||
if (event->pending_kill) {
|
||||
kill_fasync(&event->fasync, SIGIO, event->pending_kill);
|
||||
@ -5822,6 +5901,8 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
|
||||
INIT_LIST_HEAD(&event->group_entry);
|
||||
INIT_LIST_HEAD(&event->event_entry);
|
||||
INIT_LIST_HEAD(&event->sibling_list);
|
||||
INIT_LIST_HEAD(&event->rb_entry);
|
||||
|
||||
init_waitqueue_head(&event->waitq);
|
||||
init_irq_work(&event->pending, perf_pending_event);
|
||||
|
||||
@ -6028,6 +6109,8 @@ set:
|
||||
|
||||
old_rb = event->rb;
|
||||
rcu_assign_pointer(event->rb, rb);
|
||||
if (old_rb)
|
||||
ring_buffer_detach(event, old_rb);
|
||||
ret = 0;
|
||||
unlock:
|
||||
mutex_unlock(&event->mmap_mutex);
|
||||
|
@ -22,6 +22,9 @@ struct ring_buffer {
|
||||
local_t lost; /* nr records lost */
|
||||
|
||||
long watermark; /* wakeup watermark */
|
||||
/* poll crap */
|
||||
spinlock_t event_lock;
|
||||
struct list_head event_list;
|
||||
|
||||
struct perf_event_mmap_page *user_page;
|
||||
void *data_pages[0];
|
||||
|
@ -209,6 +209,9 @@ ring_buffer_init(struct ring_buffer *rb, long watermark, int flags)
|
||||
rb->writable = 1;
|
||||
|
||||
atomic_set(&rb->refcount, 1);
|
||||
|
||||
INIT_LIST_HEAD(&rb->event_list);
|
||||
spin_lock_init(&rb->event_lock);
|
||||
}
|
||||
|
||||
#ifndef CONFIG_PERF_USE_VMALLOC
|
||||
|
@ -1686,7 +1686,7 @@ static int replace_system_preds(struct event_subsystem *system,
|
||||
* replace the filter for the call.
|
||||
*/
|
||||
filter = call->filter;
|
||||
call->filter = filter_item->filter;
|
||||
rcu_assign_pointer(call->filter, filter_item->filter);
|
||||
filter_item->filter = filter;
|
||||
|
||||
fail = false;
|
||||
@ -1741,7 +1741,7 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
|
||||
filter = call->filter;
|
||||
if (!filter)
|
||||
goto out_unlock;
|
||||
call->filter = NULL;
|
||||
RCU_INIT_POINTER(call->filter, NULL);
|
||||
/* Make sure the filter is not being used */
|
||||
synchronize_sched();
|
||||
__free_filter(filter);
|
||||
@ -1782,7 +1782,7 @@ out:
|
||||
* string
|
||||
*/
|
||||
tmp = call->filter;
|
||||
call->filter = filter;
|
||||
rcu_assign_pointer(call->filter, filter);
|
||||
if (tmp) {
|
||||
/* Make sure the call is done with the filter */
|
||||
synchronize_sched();
|
||||
|
@ -34,6 +34,16 @@ int __perf_evsel__sample_size(u64 sample_type)
|
||||
return size;
|
||||
}
|
||||
|
||||
static void hists__init(struct hists *hists)
|
||||
{
|
||||
memset(hists, 0, sizeof(*hists));
|
||||
hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
|
||||
hists->entries_in = &hists->entries_in_array[0];
|
||||
hists->entries_collapsed = RB_ROOT;
|
||||
hists->entries = RB_ROOT;
|
||||
pthread_mutex_init(&hists->lock, NULL);
|
||||
}
|
||||
|
||||
void perf_evsel__init(struct perf_evsel *evsel,
|
||||
struct perf_event_attr *attr, int idx)
|
||||
{
|
||||
|
@ -1211,13 +1211,3 @@ size_t hists__fprintf_nr_events(struct hists *hists, FILE *fp)
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void hists__init(struct hists *hists)
|
||||
{
|
||||
memset(hists, 0, sizeof(*hists));
|
||||
hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
|
||||
hists->entries_in = &hists->entries_in_array[0];
|
||||
hists->entries_collapsed = RB_ROOT;
|
||||
hists->entries = RB_ROOT;
|
||||
pthread_mutex_init(&hists->lock, NULL);
|
||||
}
|
||||
|
@ -63,8 +63,6 @@ struct hists {
|
||||
struct callchain_cursor callchain_cursor;
|
||||
};
|
||||
|
||||
void hists__init(struct hists *hists);
|
||||
|
||||
struct hist_entry *__hists__add_entry(struct hists *self,
|
||||
struct addr_location *al,
|
||||
struct symbol *parent, u64 period);
|
||||
|
@ -1333,6 +1333,10 @@ int perf_session__cpu_bitmap(struct perf_session *session,
|
||||
}
|
||||
|
||||
map = cpu_map__new(cpu_list);
|
||||
if (map == NULL) {
|
||||
pr_err("Invalid cpu_list\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
for (i = 0; i < map->nr; i++) {
|
||||
int cpu = map->map[i];
|
||||
|
Loading…
Reference in New Issue
Block a user