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charset="utf-8" Split the 64-bit register accesses if 64-bit access is not supported by the PMU. Signed-off-by: Ilkka Koskinen --- drivers/perf/arm_cspmu/arm_cspmu.c | 8 ++++++-- drivers/perf/arm_cspmu/arm_cspmu.h | 1 + 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/ar= m_cspmu.c index a3f1c410b417..88547a2b73e6 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -701,8 +701,12 @@ static void arm_cspmu_write_counter(struct perf_event = *event, u64 val) =20 if (use_64b_counter_reg(cspmu)) { offset =3D counter_offset(sizeof(u64), event->hw.idx); - - writeq(val, cspmu->base1 + offset); + if (!cspmu->impl.split_64bit_access) { + writeq(val, cspmu->base1 + offset); + } else { + writel(lower_32_bits(val), cspmu->base1 + offset); + writel(upper_32_bits(val), cspmu->base1 + offset + 4); + } } else { offset =3D counter_offset(sizeof(u32), event->hw.idx); =20 diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/ar= m_cspmu.h index 51323b175a4a..c0412cf2bd97 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -110,6 +110,7 @@ struct arm_cspmu_impl_ops { /* Vendor/implementer descriptor. */ struct arm_cspmu_impl { u32 pmiidr; 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charset="utf-8" Some of the PMUs may share the interrupt. Support them by setting IRQF_SHARED Signed-off-by: Ilkka Koskinen --- drivers/perf/arm_cspmu/arm_cspmu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/ar= m_cspmu.c index 88547a2b73e6..cc5204d1b5fb 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -1067,8 +1067,8 @@ static int arm_cspmu_request_irq(struct arm_cspmu *cs= pmu) return irq; =20 ret =3D devm_request_irq(dev, irq, arm_cspmu_handle_irq, - IRQF_NOBALANCING | IRQF_NO_THREAD, dev_name(dev), - cspmu); + IRQF_NOBALANCING | IRQF_NO_THREAD | IRQF_SHARED, + dev_name(dev), cspmu); if (ret) { dev_err(dev, "Could not request IRQ %d\n", irq); return ret; --=20 2.40.1 From nobody Sat Feb 7 23:22:52 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 100F1C7EE24 for ; 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charset="utf-8" Generic filters aren't used in all the platforms. Instead, the platforms may use different means to filter events. Add support for implementation specific filters. Signed-off-by: Ilkka Koskinen --- drivers/perf/arm_cspmu/arm_cspmu.c | 8 ++++++-- drivers/perf/arm_cspmu/arm_cspmu.h | 4 ++++ 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/ar= m_cspmu.c index cc5204d1b5fb..b4c4ef81c719 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -122,6 +122,9 @@ =20 static unsigned long arm_cspmu_cpuhp_state; =20 +static void arm_cspmu_set_ev_filter(struct arm_cspmu *cspmu, + struct hw_perf_event *hwc, u32 filter); + /* * In CoreSight PMU architecture, all of the MMIO registers are 32-bit exc= ept * counter register. The counter register can be implemented as 32-bit or = 64-bit @@ -432,6 +435,7 @@ static int arm_cspmu_init_impl_ops(struct arm_cspmu *cs= pmu) CHECK_DEFAULT_IMPL_OPS(impl_ops, event_type); CHECK_DEFAULT_IMPL_OPS(impl_ops, event_filter); CHECK_DEFAULT_IMPL_OPS(impl_ops, event_attr_is_visible); + CHECK_DEFAULT_IMPL_OPS(impl_ops, set_ev_filter); =20 return 0; } @@ -799,7 +803,7 @@ static inline void arm_cspmu_set_event(struct arm_cspmu= *cspmu, writel(hwc->config, cspmu->base0 + offset); } =20 -static inline void arm_cspmu_set_ev_filter(struct arm_cspmu *cspmu, +static void arm_cspmu_set_ev_filter(struct arm_cspmu *cspmu, struct hw_perf_event *hwc, u32 filter) { @@ -833,7 +837,7 @@ static void arm_cspmu_start(struct perf_event *event, i= nt pmu_flags) arm_cspmu_set_cc_filter(cspmu, filter); } else { arm_cspmu_set_event(cspmu, hwc); - arm_cspmu_set_ev_filter(cspmu, hwc, filter); + cspmu->impl.ops.set_ev_filter(cspmu, hwc, filter); } =20 hwc->state =3D 0; diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/ar= m_cspmu.h index c0412cf2bd97..4a29b921f7e8 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -102,6 +102,10 @@ struct arm_cspmu_impl_ops { u32 (*event_type)(const struct perf_event *event); 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charset="utf-8" Some platforms may use e.g. different filtering mechanism and, thus, may need different way to validate the events. Signed-off-by: Ilkka Koskinen --- drivers/perf/arm_cspmu/arm_cspmu.c | 4 ++++ drivers/perf/arm_cspmu/arm_cspmu.h | 2 ++ 2 files changed, 6 insertions(+) diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/ar= m_cspmu.c index b4c4ef81c719..a26f484e06b1 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -593,6 +593,10 @@ static int arm_cspmu_get_event_idx(struct arm_cspmu_hw= _events *hw_events, if (idx >=3D cspmu->num_logical_ctrs) return -EAGAIN; =20 + if (cspmu->impl.ops.validate_event && + !cspmu->impl.ops.validate_event(cspmu, event)) + return -EAGAIN; + set_bit(idx, hw_events->used_ctrs); =20 return idx; diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/ar= m_cspmu.h index 4a29b921f7e8..0e5c316c96f9 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -106,6 +106,8 @@ struct arm_cspmu_impl_ops { void (*set_ev_filter)(struct arm_cspmu *cspmu, struct hw_perf_event *hwc, u32 filter); 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Thu, 1 Jun 2023 03:02:51 +0000 From: Ilkka Koskinen To: Jonathan Corbet , Will Deacon , Mark Rutland , Besar Wicaksono , Suzuki K Poulose , Robin Murphy Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Ilkka Koskinen Subject: [PATCH v2 5/5] perf: arm_cspmu: ampere_cspmu: Add support for Ampere SoC PMU Date: Wed, 31 May 2023 20:01:44 -0700 Message-Id: <20230601030144.3458136-6-ilkka@os.amperecomputing.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230601030144.3458136-1-ilkka@os.amperecomputing.com> References: <20230601030144.3458136-1-ilkka@os.amperecomputing.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: CH0PR08CA0015.namprd08.prod.outlook.com (2603:10b6:610:33::20) To DM5PR0102MB3590.prod.exchangelabs.com (2603:10b6:4:a4::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR0102MB3590:EE_|CO1PR01MB6709:EE_ X-MS-Office365-Filtering-Correlation-Id: 16f52922-5a1b-4fa3-9855-08db624cb016 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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charset="utf-8" Ampere SoC PMU follows CoreSight PMU architecture. It uses implementation specific registers to filter events rather than PMEVFILTnR registers. Signed-off-by: Ilkka Koskinen --- .../admin-guide/perf/ampere_cspmu.rst | 30 +++ drivers/perf/arm_cspmu/Makefile | 2 +- drivers/perf/arm_cspmu/ampere_cspmu.c | 232 ++++++++++++++++++ drivers/perf/arm_cspmu/ampere_cspmu.h | 17 ++ drivers/perf/arm_cspmu/arm_cspmu.c | 7 + 5 files changed, 287 insertions(+), 1 deletion(-) create mode 100644 Documentation/admin-guide/perf/ampere_cspmu.rst create mode 100644 drivers/perf/arm_cspmu/ampere_cspmu.c create mode 100644 drivers/perf/arm_cspmu/ampere_cspmu.h diff --git a/Documentation/admin-guide/perf/ampere_cspmu.rst b/Documentatio= n/admin-guide/perf/ampere_cspmu.rst new file mode 100644 index 000000000000..8da877f2a8c3 --- /dev/null +++ b/Documentation/admin-guide/perf/ampere_cspmu.rst @@ -0,0 +1,30 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +Ampere SoC Performance Monitoring Unit (PMU) +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +Ampere SoC PMU is a generic PMU IP that follows Arm CoreSight PMU architec= ture. +Therefore, the driver is implemented as a submodule of arm_cspmu driver. A= t the +first phase it's used for counting MCU events on AmpereOne. + + +MCU PMU events +-------------- + +The PMU driver supports setting filters for "rank", "bank", and "threshold= ". +Note, that the filters are per PMU instance rather than per event. To enab= le +filters, one needs to set "filter_enable=3D1". + + +Example for perf tool use:: + + / # perf list ampere + + ampere_mcu_pmu_0/act_sent/ [Kernel PMU event] + <...> + ampere_mcu_pmu_1/rd_sent/ [Kernel PMU event] + <...> + + / # perf stat -a -e ampere_mcu_pmu_0/act_sent,filter_enable=3D3,bank=3D5= ,rank=3D3,threshold=3D2/,ampere_mcu_pmu_1/rd_sent/ \ + sleep 1 diff --git a/drivers/perf/arm_cspmu/Makefile b/drivers/perf/arm_cspmu/Makef= ile index fedb17df982d..b80a8bd8da54 100644 --- a/drivers/perf/arm_cspmu/Makefile +++ b/drivers/perf/arm_cspmu/Makefile @@ -3,4 +3,4 @@ # SPDX-License-Identifier: GPL-2.0 =20 obj-$(CONFIG_ARM_CORESIGHT_PMU_ARCH_SYSTEM_PMU) +=3D arm_cspmu_module.o -arm_cspmu_module-y :=3D arm_cspmu.o nvidia_cspmu.o +arm_cspmu_module-y :=3D arm_cspmu.o nvidia_cspmu.o ampere_cspmu.o diff --git a/drivers/perf/arm_cspmu/ampere_cspmu.c b/drivers/perf/arm_cspmu= /ampere_cspmu.c new file mode 100644 index 000000000000..9101e0446a68 --- /dev/null +++ b/drivers/perf/arm_cspmu/ampere_cspmu.c @@ -0,0 +1,232 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Ampere SoC PMU (Performance Monitor Unit) + * + * Copyright (c) 2023, Ampere Computing LLC + */ + +#include "ampere_cspmu.h" + +#define PMAUXR0 0xD80 +#define PMAUXR1 0xD84 +#define PMAUXR2 0xD88 +#define PMAUXR3 0xD8C + +#define to_ampere_cspmu_ctx(cspmu) ((struct ampere_cspmu_ctx *)(cspmu->imp= l.ctx)) + +struct ampere_cspmu_ctx { + const char *name; + struct attribute **event_attr; + struct attribute **format_attr; +}; + +#define SOC_PMU_EVENT_ATTR_EXTRACTOR(_name, _config, _start, _end) \ + static inline u32 get_##_name(const struct perf_event *event) \ + { \ + return FIELD_GET(GENMASK_ULL(_end, _start), \ + event->attr._config); \ + } \ + +SOC_PMU_EVENT_ATTR_EXTRACTOR(event, config, 0, 8); +SOC_PMU_EVENT_ATTR_EXTRACTOR(threshold, config1, 0, 7); +SOC_PMU_EVENT_ATTR_EXTRACTOR(rank, config1, 8, 23); +SOC_PMU_EVENT_ATTR_EXTRACTOR(bank, config2, 0, 31); +SOC_PMU_EVENT_ATTR_EXTRACTOR(filter_enable, config2, 32, 32); + +static struct attribute *ampereone_mcu_pmu_event_attrs[] =3D { + ARM_CSPMU_EVENT_ATTR(cycle_count, 0x00), + ARM_CSPMU_EVENT_ATTR(act_sent, 0x01), + ARM_CSPMU_EVENT_ATTR(pre_sent, 0x02), + ARM_CSPMU_EVENT_ATTR(rd_sent, 0x03), + ARM_CSPMU_EVENT_ATTR(rda_sent, 0x04), + ARM_CSPMU_EVENT_ATTR(wr_sent, 0x05), + ARM_CSPMU_EVENT_ATTR(wra_sent, 0x06), + ARM_CSPMU_EVENT_ATTR(pd_entry_vld, 0x07), + ARM_CSPMU_EVENT_ATTR(sref_entry_vld, 0x08), + ARM_CSPMU_EVENT_ATTR(prea_sent, 0x09), + ARM_CSPMU_EVENT_ATTR(pre_sb_sent, 0x0a), + ARM_CSPMU_EVENT_ATTR(ref_sent, 0x0b), + ARM_CSPMU_EVENT_ATTR(rfm_sent, 0x0c), + ARM_CSPMU_EVENT_ATTR(ref_sb_sent, 0x0d), + ARM_CSPMU_EVENT_ATTR(rfm_sb_sent, 0x0e), + ARM_CSPMU_EVENT_ATTR(rd_rda_sent, 0x0f), + ARM_CSPMU_EVENT_ATTR(wr_wra_sent, 0x10), + ARM_CSPMU_EVENT_ATTR(raw_hazard, 0x11), + ARM_CSPMU_EVENT_ATTR(war_hazard, 0x12), + ARM_CSPMU_EVENT_ATTR(waw_hazard, 0x13), + ARM_CSPMU_EVENT_ATTR(rar_hazard, 0x14), + ARM_CSPMU_EVENT_ATTR(raw_war_waw_hazard, 0x15), + ARM_CSPMU_EVENT_ATTR(hprd_lprd_wr_req_vld, 0x16), + ARM_CSPMU_EVENT_ATTR(lprd_req_vld, 0x17), + ARM_CSPMU_EVENT_ATTR(hprd_req_vld, 0x18), + ARM_CSPMU_EVENT_ATTR(hprd_lprd_req_vld, 0x19), + ARM_CSPMU_EVENT_ATTR(prefetch_tgt, 0x1a), + ARM_CSPMU_EVENT_ATTR(wr_req_vld, 0x1b), + ARM_CSPMU_EVENT_ATTR(partial_wr_req_vld, 0x1c), + ARM_CSPMU_EVENT_ATTR(rd_retry, 0x1d), + ARM_CSPMU_EVENT_ATTR(wr_retry, 0x1e), + ARM_CSPMU_EVENT_ATTR(retry_gnt, 0x1f), + ARM_CSPMU_EVENT_ATTR(rank_change, 0x20), + ARM_CSPMU_EVENT_ATTR(dir_change, 0x21), + ARM_CSPMU_EVENT_ATTR(rank_dir_change, 0x22), + ARM_CSPMU_EVENT_ATTR(rank_active, 0x23), + ARM_CSPMU_EVENT_ATTR(rank_idle, 0x24), + ARM_CSPMU_EVENT_ATTR(rank_pd, 0x25), + ARM_CSPMU_EVENT_ATTR(rank_sref, 0x26), + ARM_CSPMU_EVENT_ATTR(queue_fill_gt_thresh, 0x27), + ARM_CSPMU_EVENT_ATTR(queue_rds_gt_thresh, 0x28), + ARM_CSPMU_EVENT_ATTR(queue_wrs_gt_thresh, 0x29), + ARM_CSPMU_EVENT_ATTR(phy_updt_complt, 0x2a), + ARM_CSPMU_EVENT_ATTR(tz_fail, 0x2b), + ARM_CSPMU_EVENT_ATTR(dram_errc, 0x2c), + ARM_CSPMU_EVENT_ATTR(dram_errd, 0x2d), + ARM_CSPMU_EVENT_ATTR(read_data_return, 0x32), + ARM_CSPMU_EVENT_ATTR(chi_wr_data_delta, 0x33), + ARM_CSPMU_EVENT_ATTR(zq_start, 0x34), + ARM_CSPMU_EVENT_ATTR(zq_latch, 0x35), + ARM_CSPMU_EVENT_ATTR(wr_fifo_full, 0x36), + ARM_CSPMU_EVENT_ATTR(info_fifo_full, 0x37), + ARM_CSPMU_EVENT_ATTR(cmd_fifo_full, 0x38), + ARM_CSPMU_EVENT_ATTR(dfi_nop, 0x39), + ARM_CSPMU_EVENT_ATTR(dfi_cmd, 0x3a), + ARM_CSPMU_EVENT_ATTR(rd_run_len, 0x3b), + ARM_CSPMU_EVENT_ATTR(wr_run_len, 0x3c), + + ARM_CSPMU_EVENT_ATTR(cycles, ARM_CSPMU_EVT_CYCLES_DEFAULT), + NULL, +}; + +static struct attribute *ampereone_mcu_format_attrs[] =3D { + ARM_CSPMU_FORMAT_EVENT_ATTR, + ARM_CSPMU_FORMAT_ATTR(threshold, "config1:0-7"), + ARM_CSPMU_FORMAT_ATTR(rank, "config1:8-23"), + ARM_CSPMU_FORMAT_ATTR(bank, "config2:0-31"), + ARM_CSPMU_FORMAT_ATTR(filter_enable, "config2:32"), + NULL, +}; + +static struct attribute ** +ampere_cspmu_get_event_attrs(const struct arm_cspmu *cspmu) +{ + const struct ampere_cspmu_ctx *ctx =3D to_ampere_cspmu_ctx(cspmu); + + return ctx->event_attr; +} + +static struct attribute ** +ampere_cspmu_get_format_attrs(const struct arm_cspmu *cspmu) +{ + const struct ampere_cspmu_ctx *ctx =3D to_ampere_cspmu_ctx(cspmu); + + return ctx->format_attr; +} + +static const char * +ampere_cspmu_get_name(const struct arm_cspmu *cspmu) +{ + const struct ampere_cspmu_ctx *ctx =3D to_ampere_cspmu_ctx(cspmu); + + return ctx->name; +} + +static u32 ampere_cspmu_event_filter(const struct perf_event *event) +{ + return 0; +} + +static void ampere_cspmu_set_ev_filter(struct arm_cspmu *cspmu, + struct hw_perf_event *hwc, + u32 filter) +{ + struct perf_event *event; + unsigned int idx; + u32 threshold =3D 0, rank =3D 0, bank =3D 0; + + /* + * At this point, all the events have the same filter settings. + * Therefore, take the first event and use its configuration. + */ + idx =3D find_first_bit(cspmu->hw_events.used_ctrs, + cspmu->cycle_counter_logical_idx); + + event =3D cspmu->hw_events.events[idx]; + if (get_filter_enable(event)) { + threshold =3D get_threshold(event); + rank =3D get_rank(event); + bank =3D get_bank(event); + } + + writel(threshold, cspmu->base0 + PMAUXR0); + writel(rank, cspmu->base0 + PMAUXR1); + writel(bank, cspmu->base0 + PMAUXR2); +} + +static bool ampere_cspmu_validate_event(struct arm_cspmu *cspmu, + struct perf_event *new) +{ + struct perf_event *curr; + unsigned int idx; + u32 threshold =3D 0, rank =3D 0, bank =3D 0; + + /* We compare the global filter settings to existing events */ + idx =3D find_first_bit(cspmu->hw_events.used_ctrs, + cspmu->cycle_counter_logical_idx); + + /* This is the first event */ + if (idx =3D=3D cspmu->cycle_counter_logical_idx) + return true; + + curr =3D cspmu->hw_events.events[idx]; + + if (get_filter_enable(new)) { + threshold =3D get_threshold(new); + rank =3D get_rank(new); + bank =3D get_bank(new); + } + + if (get_filter_enable(new) !=3D get_filter_enable(curr) || + get_threshold(curr) !=3D threshold || + get_rank(curr) !=3D rank || + get_bank(curr) !=3D bank) + return false; + + return true; +} + +static char *ampere_cspmu_format_name(const struct arm_cspmu *cspmu, + const char *name_pattern) +{ + struct device *dev =3D cspmu->dev; + static atomic_t pmu_generic_idx =3D {0}; + + return devm_kasprintf(dev, GFP_KERNEL, name_pattern, + atomic_fetch_inc(&pmu_generic_idx)); +} + +int ampere_cspmu_init_ops(struct arm_cspmu *cspmu) +{ + struct device *dev =3D cspmu->dev; + struct ampere_cspmu_ctx *ctx; + struct arm_cspmu_impl_ops *impl_ops =3D &cspmu->impl.ops; + + ctx =3D devm_kzalloc(dev, sizeof(struct ampere_cspmu_ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + + ctx->event_attr =3D ampereone_mcu_pmu_event_attrs; + ctx->format_attr =3D ampereone_mcu_format_attrs; + ctx->name =3D ampere_cspmu_format_name(cspmu, + "ampere_mcu_pmu_%u"); + cspmu->impl.ctx =3D ctx; + cspmu->impl.split_64bit_access =3D true; + + impl_ops->event_filter =3D ampere_cspmu_event_filter; + impl_ops->set_ev_filter =3D ampere_cspmu_set_ev_filter; + impl_ops->validate_event =3D ampere_cspmu_validate_event; + impl_ops->get_name =3D ampere_cspmu_get_name; + impl_ops->get_event_attrs =3D ampere_cspmu_get_event_attrs; + impl_ops->get_format_attrs =3D ampere_cspmu_get_format_attrs; + + return 0; +} diff --git a/drivers/perf/arm_cspmu/ampere_cspmu.h b/drivers/perf/arm_cspmu= /ampere_cspmu.h new file mode 100644 index 000000000000..9b3e1628d1d6 --- /dev/null +++ b/drivers/perf/arm_cspmu/ampere_cspmu.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * Ampere SoC PMU (Performance Monitor Unit) + * + * Copyright (c) 2023, Ampere Computing LLC + */ + +#ifndef __AMPERE_CSPMU_H__ +#define __AMPERE_CSPMU_H__ + +#include "arm_cspmu.h" + +/* Allocate AMPERE descriptor. */ +int ampere_cspmu_init_ops(struct arm_cspmu *cspmu); + +#endif /* __AMPERE_CSPMU_H__ */ diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/ar= m_cspmu.c index a26f484e06b1..42b57f353777 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -30,6 +30,7 @@ #include #include =20 +#include "ampere_cspmu.h" #include "arm_cspmu.h" #include "nvidia_cspmu.h" =20 @@ -119,6 +120,7 @@ =20 /* JEDEC-assigned JEP106 identification code */ #define ARM_CSPMU_IMPL_ID_NVIDIA 0x36B +#define ARM_CSPMU_IMPL_ID_AMPERE 0xA16 =20 static unsigned long arm_cspmu_cpuhp_state; =20 @@ -394,6 +396,11 @@ static const struct impl_match impl_match[] =3D { .mask =3D ARM_CSPMU_PMIIDR_IMPLEMENTER, .impl_init_ops =3D nv_cspmu_init_ops }, + { + .pmiidr =3D ARM_CSPMU_IMPL_ID_AMPERE, + .mask =3D ARM_CSPMU_PMIIDR_IMPLEMENTER, + .impl_init_ops =3D ampere_cspmu_init_ops + }, {} }; =20 --=20 2.40.1