4.14-stable review patch. If anyone has any objections, please let me know.
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From: Andi Kleen ak@linux.intel.com
commit 58ba4d5a25579e5c7e312bd359c95f3a9a0a242c upstream.
0day testing reported a perf test regression on Haswell systems without RTM. Commit a5df70c35 hides the in_tx/in_tx_cp attributes when RTM is not available, but the TSX events are still available in sysfs. Due to the missing attributes the event parser fails on those files.
Don't show the TSX events in sysfs when RTM is not available on Haswell/Broadwell/Skylake.
Fixes: a5df70c354c2 (perf/x86: Only show format attributes when supported) Reported-by: kernel test robot xiaolong.ye@intel.com Tested-by: Jin Yao yao.jin@linux.intel.com Signed-off-by: Andi Kleen ak@linux.intel.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Acked-by: Peter Zijlstra peterz@infradead.org Link: https://lkml.kernel.org/r/20171109000718.14137-1-andi@firstfloor.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/events/intel/core.c | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-)
--- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -3730,6 +3730,19 @@ EVENT_ATTR_STR(cycles-t, cycles_t, "even EVENT_ATTR_STR(cycles-ct, cycles_ct, "event=0x3c,in_tx=1,in_tx_cp=1");
static struct attribute *hsw_events_attrs[] = { + EVENT_PTR(mem_ld_hsw), + EVENT_PTR(mem_st_hsw), + EVENT_PTR(td_slots_issued), + EVENT_PTR(td_slots_retired), + EVENT_PTR(td_fetch_bubbles), + EVENT_PTR(td_total_slots), + EVENT_PTR(td_total_slots_scale), + EVENT_PTR(td_recovery_bubbles), + EVENT_PTR(td_recovery_bubbles_scale), + NULL +}; + +static struct attribute *hsw_tsx_events_attrs[] = { EVENT_PTR(tx_start), EVENT_PTR(tx_commit), EVENT_PTR(tx_abort), @@ -3742,18 +3755,16 @@ static struct attribute *hsw_events_attr EVENT_PTR(el_conflict), EVENT_PTR(cycles_t), EVENT_PTR(cycles_ct), - EVENT_PTR(mem_ld_hsw), - EVENT_PTR(mem_st_hsw), - EVENT_PTR(td_slots_issued), - EVENT_PTR(td_slots_retired), - EVENT_PTR(td_fetch_bubbles), - EVENT_PTR(td_total_slots), - EVENT_PTR(td_total_slots_scale), - EVENT_PTR(td_recovery_bubbles), - EVENT_PTR(td_recovery_bubbles_scale), NULL };
+static __init struct attribute **get_hsw_events_attrs(void) +{ + return boot_cpu_has(X86_FEATURE_RTM) ? + merge_attr(hsw_events_attrs, hsw_tsx_events_attrs) : + hsw_events_attrs; +} + static ssize_t freeze_on_smi_show(struct device *cdev, struct device_attribute *attr, char *buf) @@ -4182,7 +4193,7 @@ __init int intel_pmu_init(void)
x86_pmu.hw_config = hsw_hw_config; x86_pmu.get_event_constraints = hsw_get_event_constraints; - x86_pmu.cpu_events = hsw_events_attrs; + x86_pmu.cpu_events = get_hsw_events_attrs(); x86_pmu.lbr_double_abort = true; extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? hsw_format_attr : nhm_format_attr; @@ -4221,7 +4232,7 @@ __init int intel_pmu_init(void)
x86_pmu.hw_config = hsw_hw_config; x86_pmu.get_event_constraints = hsw_get_event_constraints; - x86_pmu.cpu_events = hsw_events_attrs; + x86_pmu.cpu_events = get_hsw_events_attrs(); x86_pmu.limit_period = bdw_limit_period; extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? hsw_format_attr : nhm_format_attr; @@ -4279,7 +4290,7 @@ __init int intel_pmu_init(void) extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? hsw_format_attr : nhm_format_attr; extra_attr = merge_attr(extra_attr, skl_format_attr); - x86_pmu.cpu_events = hsw_events_attrs; + x86_pmu.cpu_events = get_hsw_events_attrs(); intel_pmu_pebs_data_source_skl( boot_cpu_data.x86_model == INTEL_FAM6_SKYLAKE_X); pr_cont("Skylake events, ");