From 26fabd6d2ffc2812138a613bec84ec72541842e7 Mon Sep 17 00:00:00 2001 From: Nikita Shubin Date: Tue, 28 Jun 2022 14:45:55 +0300 Subject: [PATCH] drivers/perf: riscv_pmu_sbi: perf format MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Update driver to export formatting and event information to sysfs so it can be used by the perf user space tools with the syntaxes: perf stat -e cpu/event=0x05 perf stat -e cpu/event=0x05,firmware=0x1/ 63-bit is used to distinguish hardware events from firmware. Firmware events are defined by "RISC-V Supervisor Binary Interface Specification". perf stat -e cpu/event=0x05,firmware=0x1/ is equivalent to perf stat -e r8000000000000005 Suggested-by: João Mário Domingos Signed-off-by: Nikita Shubin Link: https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/riscv-sbi.adoc Link: https://lore.kernel.org/r/20220628114625.166665-2-nikita.shubin@maquefel.me Signed-off-by: Will Deacon --- drivers/perf/riscv_pmu_sbi.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index adc910e0f1e26..06fefcccf379a 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -22,6 +22,25 @@ #include #include +PMU_FORMAT_ATTR(event, "config:0-47"); +PMU_FORMAT_ATTR(firmware, "config:63"); + +static struct attribute *riscv_arch_formats_attr[] = { + &format_attr_event.attr, + &format_attr_firmware.attr, + NULL, +}; + +static struct attribute_group riscv_pmu_format_group = { + .name = "format", + .attrs = riscv_arch_formats_attr, +}; + +static const struct attribute_group *riscv_pmu_attr_groups[] = { + &riscv_pmu_format_group, + NULL, +}; + union sbi_pmu_ctr_info { unsigned long value; struct { @@ -788,6 +807,7 @@ static int pmu_sbi_device_probe(struct platform_device *pdev) pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT; pmu->pmu.capabilities |= PERF_PMU_CAP_NO_EXCLUDE; } + pmu->pmu.attr_groups = riscv_pmu_attr_groups; pmu->num_counters = num_counters; pmu->ctr_start = pmu_sbi_ctr_start; pmu->ctr_stop = pmu_sbi_ctr_stop; -- 2.30.2