[RFC PATCH 09/12] perf tools: Add RISC-V trace PMU record capabilities
Bo Gan
ganboing at gmail.com
Tue Apr 14 16:31:35 PDT 2026
NACK. The file is largely copied from tools/perf/arch/x86/util/intel-pt.c
There's even markers like "Intel Processor Trace" in file auxtrace.c.
There's no mentioning of authorship, but instead Spacemit claming its
copyright over it.
Bo
On 4/13/26 20:41, Zane Leung wrote:
> From: liangzhen <zhen.liang at spacemit.com>
>
> Introduce the required auxiliary API functions allowing
> the perf core to interact with RISC-V trace perf driver.
>
> Signed-off-by: liangzhen <zhen.liang at spacemit.com>
> ---
> tools/perf/arch/riscv/util/Build | 2 +-
> tools/perf/arch/riscv/util/auxtrace.c | 489 ++++++++++++++++++++++++++
> tools/perf/util/auxtrace.c | 1 +
> tools/perf/util/auxtrace.h | 1 +
> tools/perf/util/rvtrace.h | 38 ++
> 5 files changed, 530 insertions(+), 1 deletion(-)
> create mode 100644 tools/perf/arch/riscv/util/auxtrace.c
> create mode 100644 tools/perf/util/rvtrace.h
>
> diff --git a/tools/perf/arch/riscv/util/Build b/tools/perf/arch/riscv/util/Build
> index 748068a3a5c5..10f41f97bc2e 100644
> --- a/tools/perf/arch/riscv/util/Build
> +++ b/tools/perf/arch/riscv/util/Build
> @@ -1,3 +1,3 @@
> perf-util-y += header.o
>
> -perf-util-y += pmu.o
> +perf-util-y += pmu.o auxtrace.o
> diff --git a/tools/perf/arch/riscv/util/auxtrace.c b/tools/perf/arch/riscv/util/auxtrace.c
> new file mode 100644
> index 000000000000..5feee198ef97
> --- /dev/null
> +++ b/tools/perf/arch/riscv/util/auxtrace.c
> @@ -0,0 +1,489 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright(C) 2026 Spacemit Limited. All rights reserved.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/types.h>
> +#include <linux/bitops.h>
> +#include <linux/log2.h>
> +#include <linux/zalloc.h>
> +#include <linux/string.h>
> +#include <time.h>
> +
> +#include <internal/lib.h> // page_size
> +#include "../../../util/auxtrace.h"
> +#include "../../../util/cpumap.h"
> +#include "../../../util/debug.h"
> +#include "../../../util/event.h"
> +#include "../../../util/evlist.h"
> +#include "../../../util/evsel.h"
> +#include "../../../util/rvtrace.h"
> +#include "../../../util/pmu.h"
> +#include "../../../util/record.h"
> +#include "../../../util/session.h"
> +#include "../../../util/tsc.h"
> +#include "../../../util/evsel_config.h"
> +
> +#define RVTRACE_PMU_NAME "rvtrace"
> +#define KiB(x) ((x) * 1024)
> +#define MiB(x) ((x) * 1024 * 1024)
> +
> +static const char * const metadata_encoder_ro[] = {
> + [RVTRACE_ENCODER_FORMAT] = "control/format",
> + [RVTRACE_ENCODER_CONTEXT] = "control/context",
> + [RVTRACE_ENCODER_INHB_SRC] = "control/inhb_src",
> + [RVTRACE_ENCODER_SRCBITS] = "features/srcb",
> + [RVTRACE_ENCODER_SRCID] = "features/srcid"
> +};
> +
> +struct rvtrace_recording {
> + struct auxtrace_record itr;
> + struct perf_pmu *rvtrace_pmu;
> + struct evlist *evlist;
> + bool snapshot_mode;
> + size_t snapshot_size;
> +};
> +
> +static int rvtrace_parse_snapshot_options(struct auxtrace_record *itr,
> + struct record_opts *opts,
> + const char *str)
> +{
> + struct rvtrace_recording *ptr =
> + container_of(itr, struct rvtrace_recording, itr);
> + unsigned long long snapshot_size = 0;
> + char *endptr;
> +
> + if (str) {
> + snapshot_size = strtoull(str, &endptr, 0);
> + if (*endptr || snapshot_size > SIZE_MAX)
> + return -1;
> + }
> +
> + opts->auxtrace_snapshot_mode = true;
> + opts->auxtrace_snapshot_size = snapshot_size;
> + ptr->snapshot_size = snapshot_size;
> +
> + return 0;
> +}
> +
> +static size_t rvtrace_info_priv_size(struct auxtrace_record *itr __maybe_unused,
> + struct evlist *evlist __maybe_unused)
> +{
> + int encoder;
> + struct perf_cpu_map *event_cpus = evlist->core.user_requested_cpus;
> + struct perf_cpu_map *intersect_cpus;
> +
> + if (!perf_cpu_map__has_any_cpu(event_cpus)) {
> + /* cpu map is not "any" CPU , we have specific CPUs to work with */
> + struct perf_cpu_map *online_cpus = perf_cpu_map__new_online_cpus();
> +
> + intersect_cpus = perf_cpu_map__intersect(event_cpus, online_cpus);
> + perf_cpu_map__put(online_cpus);
> + } else {
> + /* Event can be "any" CPU so count all online CPUs. */
> + intersect_cpus = perf_cpu_map__new_online_cpus();
> + }
> +
> + encoder = perf_cpu_map__nr(intersect_cpus);
> + perf_cpu_map__put(intersect_cpus);
> +
> + return (RVTRACE_HEADER_SIZE + encoder * RVTRACE_ENCODER_PRIV_SIZE);
> +}
> +
> +static int rvtrace_get_ro(struct perf_pmu *pmu, struct perf_cpu cpu, const char *path, __u64 *val)
> +{
> + char pmu_path[PATH_MAX];
> + int scan;
> +
> + /* Get RO metadata from sysfs */
> + snprintf(pmu_path, PATH_MAX, "cpu%d/%s", cpu.cpu, path);
> +
> + scan = perf_pmu__scan_file(pmu, pmu_path, "%llx", val);
> + if (scan != 1) {
> + pr_err("%s: error reading: %s\n", __func__, pmu_path);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static void rvtrace_get_metadata(struct perf_cpu cpu, u32 *offset,
> + struct auxtrace_record *itr,
> + struct perf_record_auxtrace_info *info)
> +{
> + struct rvtrace_recording *ptr = container_of(itr, struct rvtrace_recording, itr);
> + struct perf_pmu *rvtrace_pmu = ptr->rvtrace_pmu;
> +
> + info->priv[*offset + RVTRACE_ENCODER_CPU] = cpu.cpu;
> + info->priv[*offset + RVTRACE_ENCODER_NR_TRC_PARAMS] = RVTRACE_ENCODER_NR_TRC_PARAMS_LENGTH;
> +
> + /* Get read-only information from sysFS */
> + rvtrace_get_ro(rvtrace_pmu, cpu, metadata_encoder_ro[RVTRACE_ENCODER_FORMAT],
> + &info->priv[*offset + RVTRACE_ENCODER_FORMAT]);
> + rvtrace_get_ro(rvtrace_pmu, cpu, metadata_encoder_ro[RVTRACE_ENCODER_CONTEXT],
> + &info->priv[*offset + RVTRACE_ENCODER_CONTEXT]);
> + rvtrace_get_ro(rvtrace_pmu, cpu, metadata_encoder_ro[RVTRACE_ENCODER_INHB_SRC],
> + &info->priv[*offset + RVTRACE_ENCODER_INHB_SRC]);
> + rvtrace_get_ro(rvtrace_pmu, cpu, metadata_encoder_ro[RVTRACE_ENCODER_SRCBITS],
> + &info->priv[*offset + RVTRACE_ENCODER_SRCBITS]);
> + rvtrace_get_ro(rvtrace_pmu, cpu, metadata_encoder_ro[RVTRACE_ENCODER_SRCID],
> + &info->priv[*offset + RVTRACE_ENCODER_SRCID]);
> +
> + /* Where the next CPU entry should start from */
> + *offset += RVTRACE_ENCODER_PRIV_MAX;
> +}
> +
> +static int rvtrace_info_fill(struct auxtrace_record *itr, struct perf_session *session,
> + struct perf_record_auxtrace_info *auxtrace_info, size_t priv_size)
> +{
> + int i;
> + u32 offset;
> + u64 nr_cpu, type;
> + struct perf_cpu_map *cpu_map;
> + struct perf_cpu_map *event_cpus = session->evlist->core.user_requested_cpus;
> + struct perf_cpu_map *online_cpus = perf_cpu_map__new_online_cpus();
> + struct rvtrace_recording *ptr = container_of(itr, struct rvtrace_recording, itr);
> + struct perf_pmu *rvtrace_pmu = ptr->rvtrace_pmu;
> + struct perf_cpu cpu;
> +
> + if (priv_size != rvtrace_info_priv_size(itr, session->evlist))
> + return -EINVAL;
> +
> + if (!session->evlist->core.nr_mmaps)
> + return -EINVAL;
> +
> + /* If the cpu_map has the "any" CPU all online CPUs are involved */
> + if (perf_cpu_map__has_any_cpu(event_cpus)) {
> + cpu_map = online_cpus;
> + } else {
> + /* Make sure all specified CPUs are online */
> + perf_cpu_map__for_each_cpu(cpu, i, event_cpus) {
> + if (!perf_cpu_map__has(online_cpus, cpu))
> + return -EINVAL;
> + }
> +
> + cpu_map = event_cpus;
> + }
> +
> + nr_cpu = perf_cpu_map__nr(cpu_map);
> + type = rvtrace_pmu->type;
> +
> + /* First fill out the session header */
> + auxtrace_info->type = PERF_AUXTRACE_RISCV_TRACE;
> + auxtrace_info->priv[RVTRACE_PMU_TYPE_CPUS] = type << 32;
> + auxtrace_info->priv[RVTRACE_PMU_TYPE_CPUS] |= nr_cpu;
> +
> + offset = RVTRACE_HEADER_MAX;
> +
> + perf_cpu_map__for_each_cpu(cpu, i, cpu_map) {
> + assert(offset < priv_size);
> + rvtrace_get_metadata(cpu, &offset, itr, auxtrace_info);
> + }
> +
> + perf_cpu_map__put(online_cpus);
> +
> + return 0;
> +}
> +
> +static int rvtrace_set_sink_attr(struct perf_pmu *pmu,
> + struct evsel *evsel)
> +{
> + char msg[BUFSIZ], path[PATH_MAX], *sink;
> + struct evsel_config_term *term;
> + int ret = -EINVAL;
> + u32 hash;
> +
> + if (evsel->core.attr.config2 & GENMASK(31, 0))
> + return 0;
> +
> + list_for_each_entry(term, &evsel->config_terms, list) {
> + if (term->type != EVSEL__CONFIG_TERM_DRV_CFG)
> + continue;
> +
> + sink = term->val.str;
> + snprintf(path, PATH_MAX, "sinks/%s", sink);
> +
> + ret = perf_pmu__scan_file(pmu, path, "%x", &hash);
> + if (ret != 1) {
> + if (errno == ENOENT)
> + pr_err("Couldn't find sink \"%s\" on event %s\n"
> + "Missing kernel or device support?\n\n"
> + "Hint: An appropriate sink will be picked automatically if one isn't specified.\n",
> + sink, evsel__name(evsel));
> + else
> + pr_err("Failed to set sink \"%s\" on event %s with %d (%s)\n",
> + sink, evsel__name(evsel), errno,
> + str_error_r(errno, msg, sizeof(msg)));
> + return ret;
> + }
> +
> + evsel->core.attr.config2 |= hash;
> + return 0;
> + }
> +
> + /*
> + * No sink was provided on the command line - allow the CoreSight
> + * system to look for a default
> + */
> + return 0;
> +}
> +
> +static int rvtrace_recording_options(struct auxtrace_record *itr, struct evlist *evlist,
> + struct record_opts *opts)
> +{
> + struct rvtrace_recording *ptr = container_of(itr, struct rvtrace_recording, itr);
> + struct perf_pmu *rvtrace_pmu = ptr->rvtrace_pmu;
> + struct evsel *evsel, *rvtrace_evsel = NULL;
> + struct perf_cpu_map *cpus = evlist->core.user_requested_cpus;
> + bool privileged = perf_event_paranoid_check(-1);
> + struct evsel *tracking_evsel;
> + int err;
> +
> + ptr->evlist = evlist;
> + ptr->snapshot_mode = opts->auxtrace_snapshot_mode;
> + evlist__for_each_entry(evlist, evsel) {
> + if (evsel->core.attr.type == rvtrace_pmu->type) {
> + if (rvtrace_evsel) {
> + pr_err("There may be only one " RVTRACE_PMU_NAME "x event\n");
> + return -EINVAL;
> + }
> + evsel->core.attr.freq = 0;
> + evsel->core.attr.sample_period = 1;
> + evsel->needs_auxtrace_mmap = true;
> + rvtrace_evsel = evsel;
> + opts->full_auxtrace = true;
> + }
> + }
> +
> + if (!opts->full_auxtrace)
> + return 0;
> +
> + err = rvtrace_set_sink_attr(rvtrace_pmu, rvtrace_evsel);
> + if (err)
> + return err;
> +
> + /* we are in snapshot mode */
> + if (opts->auxtrace_snapshot_mode) {
> + /*
> + * No size were given to '-S' or '-m,', so go with
> + * the default
> + */
> + if (!opts->auxtrace_snapshot_size && !opts->auxtrace_mmap_pages) {
> + if (privileged) {
> + opts->auxtrace_mmap_pages = MiB(4) / page_size;
> + } else {
> + opts->auxtrace_mmap_pages = KiB(128) / page_size;
> + if (opts->mmap_pages == UINT_MAX)
> + opts->mmap_pages = KiB(256) / page_size;
> + }
> + } else if (!opts->auxtrace_mmap_pages && !privileged &&
> + opts->mmap_pages == UINT_MAX) {
> + opts->mmap_pages = KiB(256) / page_size;
> + }
> +
> + /*
> + * '-m,xyz' was specified but no snapshot size, so make the
> + * snapshot size as big as the auxtrace mmap area.
> + */
> + if (!opts->auxtrace_snapshot_size) {
> + opts->auxtrace_snapshot_size =
> + opts->auxtrace_mmap_pages * (size_t)page_size;
> + }
> +
> + /*
> + * -Sxyz was specified but no auxtrace mmap area, so make the
> + * auxtrace mmap area big enough to fit the requested snapshot
> + * size.
> + */
> + if (!opts->auxtrace_mmap_pages) {
> + size_t sz = opts->auxtrace_snapshot_size;
> +
> + sz = round_up(sz, page_size) / page_size;
> + opts->auxtrace_mmap_pages = roundup_pow_of_two(sz);
> + }
> +
> + /* Snapshot size can't be bigger than the auxtrace area */
> + if (opts->auxtrace_snapshot_size >
> + opts->auxtrace_mmap_pages * (size_t)page_size) {
> + pr_err("Snapshot size %zu must not be greater than AUX area tracing mmap size %zu\n",
> + opts->auxtrace_snapshot_size,
> + opts->auxtrace_mmap_pages * (size_t)page_size);
> + return -EINVAL;
> + }
> +
> + /* Something went wrong somewhere - this shouldn't happen */
> + if (!opts->auxtrace_snapshot_size || !opts->auxtrace_mmap_pages) {
> + pr_err("Failed to calculate default snapshot size and/or AUX area tracing mmap pages\n");
> + return -EINVAL;
> + }
> +
> + pr_debug2("%s snapshot size: %zu\n", RVTRACE_PMU_NAME,
> + opts->auxtrace_snapshot_size);
> + }
> +
> + /* Buffer sizes weren't specified with '-m,xyz' so give some defaults */
> + if (!opts->auxtrace_mmap_pages) {
> + if (privileged) {
> + opts->auxtrace_mmap_pages = MiB(4) / page_size;
> + } else {
> + opts->auxtrace_mmap_pages = KiB(128) / page_size;
> + if (opts->mmap_pages == UINT_MAX)
> + opts->mmap_pages = KiB(256) / page_size;
> + }
> + }
> +
> + /* Validate auxtrace_mmap_pages */
> + if (opts->auxtrace_mmap_pages) {
> + size_t sz = opts->auxtrace_mmap_pages * (size_t)page_size;
> + size_t min_sz;
> +
> + if (opts->auxtrace_snapshot_mode)
> + min_sz = KiB(4);
> + else
> + min_sz = KiB(8);
> +
> + if (sz < min_sz || !is_power_of_2(sz)) {
> + pr_err("Invalid mmap size for Intel Processor Trace: must be at least %zuKiB and a power of 2\n",
> + min_sz / 1024);
> + return -EINVAL;
> + }
> + }
> +
> + /*
> + * To obtain the auxtrace buffer file descriptor, the auxtrace event
> + * must come first.
> + */
> + evlist__to_front(evlist, rvtrace_evsel);
> +
> + /*
> + * get the CPU on the sample - need it to associate trace ID in the
> + * AUX_OUTPUT_HW_ID event, and the AUX event for per-cpu mmaps.
> + */
> + evsel__set_sample_bit(rvtrace_evsel, CPU);
> +
> + /* Add dummy event to keep tracking */
> + err = parse_event(evlist, "dummy:u");
> + if (err)
> + return err;
> +
> + tracking_evsel = evlist__last(evlist);
> + evlist__set_tracking_event(evlist, tracking_evsel);
> +
> + tracking_evsel->core.attr.freq = 0;
> + tracking_evsel->core.attr.sample_period = 1;
> +
> + /* In per-cpu case, always need the time of mmap events etc */
> + if (!perf_cpu_map__is_any_cpu_or_is_empty(cpus))
> + evsel__set_sample_bit(tracking_evsel, TIME);
> +
> + return 0;
> +}
> +
> +static int rvtrace_snapshot_start(struct auxtrace_record *itr)
> +{
> + struct rvtrace_recording *ptr =
> + container_of(itr, struct rvtrace_recording, itr);
> + struct evsel *evsel;
> +
> + evlist__for_each_entry(ptr->evlist, evsel) {
> + if (evsel->core.attr.type == ptr->rvtrace_pmu->type)
> + return evsel__disable(evsel);
> + }
> + return -EINVAL;
> +}
> +
> +static int rvtrace_snapshot_finish(struct auxtrace_record *itr)
> +{
> + struct rvtrace_recording *ptr =
> + container_of(itr, struct rvtrace_recording, itr);
> + struct evsel *evsel;
> +
> + evlist__for_each_entry(ptr->evlist, evsel) {
> + if (evsel->core.attr.type == ptr->rvtrace_pmu->type)
> + return evsel__enable(evsel);
> + }
> + return -EINVAL;
> +}
> +
> +static u64 rvtrace_reference(struct auxtrace_record *itr __maybe_unused)
> +{
> + return rdtsc();
> +}
> +
> +static void rvtrace_recording_free(struct auxtrace_record *itr)
> +{
> + struct rvtrace_recording *ptr =
> + container_of(itr, struct rvtrace_recording, itr);
> +
> + free(ptr);
> +}
> +
> +static struct auxtrace_record *rvtrace_recording_init(int *err, struct perf_pmu *rvtrace_pmu)
> +{
> + struct rvtrace_recording *ptr;
> +
> + if (!rvtrace_pmu) {
> + *err = -ENODEV;
> + return NULL;
> + }
> +
> + ptr = zalloc(sizeof(*ptr));
> + if (!ptr) {
> + *err = -ENOMEM;
> + return NULL;
> + }
> +
> + ptr->rvtrace_pmu = rvtrace_pmu;
> + ptr->itr.parse_snapshot_options = rvtrace_parse_snapshot_options;
> + ptr->itr.recording_options = rvtrace_recording_options;
> + ptr->itr.info_priv_size = rvtrace_info_priv_size;
> + ptr->itr.info_fill = rvtrace_info_fill;
> + ptr->itr.snapshot_start = rvtrace_snapshot_start;
> + ptr->itr.snapshot_finish = rvtrace_snapshot_finish;
> + ptr->itr.free = rvtrace_recording_free;
> + ptr->itr.reference = rvtrace_reference;
> + ptr->itr.read_finish = auxtrace_record__read_finish;
> + ptr->itr.alignment = 0;
> +
> + *err = 0;
> + return &ptr->itr;
> +}
> +
> +static struct perf_pmu *find_pmu_for_event(struct perf_pmu **pmus,
> + int pmu_nr, struct evsel *evsel)
> +{
> + int i;
> +
> + if (!pmus)
> + return NULL;
> +
> + for (i = 0; i < pmu_nr; i++) {
> + if (evsel->core.attr.type == pmus[i]->type)
> + return pmus[i];
> + }
> +
> + return NULL;
> +}
> +
> +struct auxtrace_record *auxtrace_record__init(struct evlist *evlist, int *err)
> +{
> + struct perf_pmu *rvtrace_pmu = NULL;
> + struct perf_pmu *found_rvtrace = NULL;
> + struct evsel *evsel;
> +
> + if (!evlist)
> + return NULL;
> +
> + rvtrace_pmu = perf_pmus__find(RVTRACE_PMU_NAME);
> + evlist__for_each_entry(evlist, evsel) {
> + if (rvtrace_pmu && !found_rvtrace)
> + found_rvtrace = find_pmu_for_event(&rvtrace_pmu, 1, evsel);
> + }
> +
> + if (found_rvtrace)
> + return rvtrace_recording_init(err, rvtrace_pmu);
> +
> + *err = 0;
> + return NULL;
> +}
> diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
> index a224687ffbc1..944a43d48739 100644
> --- a/tools/perf/util/auxtrace.c
> +++ b/tools/perf/util/auxtrace.c
> @@ -1411,6 +1411,7 @@ int perf_event__process_auxtrace_info(const struct perf_tool *tool __maybe_unuse
> case PERF_AUXTRACE_VPA_DTL:
> err = powerpc_vpadtl_process_auxtrace_info(event, session);
> break;
> + case PERF_AUXTRACE_RISCV_TRACE:
> case PERF_AUXTRACE_UNKNOWN:
> default:
> return -EINVAL;
> diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h
> index 6947f3f284c0..4f4714c1b53f 100644
> --- a/tools/perf/util/auxtrace.h
> +++ b/tools/perf/util/auxtrace.h
> @@ -46,6 +46,7 @@ enum auxtrace_type {
> PERF_AUXTRACE_S390_CPUMSF,
> PERF_AUXTRACE_HISI_PTT,
> PERF_AUXTRACE_VPA_DTL,
> + PERF_AUXTRACE_RISCV_TRACE,
> };
>
> enum itrace_period_type {
> diff --git a/tools/perf/util/rvtrace.h b/tools/perf/util/rvtrace.h
> new file mode 100644
> index 000000000000..1e48ed989dd7
> --- /dev/null
> +++ b/tools/perf/util/rvtrace.h
> @@ -0,0 +1,38 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright(C) 2026 Spacemit Limited. All rights reserved.
> + */
> +
> +#ifndef INCLUDE__UTIL_PERF_RVTRACE_H__
> +#define INCLUDE__UTIL_PERF_RVTRACE_H__
> +
> +#include "debug.h"
> +#include "auxtrace.h"
> +#include "util/event.h"
> +#include "util/session.h"
> +#include <linux/bits.h>
> +
> +enum {
> + /* PMU->type (32 bit), total # of CPUs (32 bit) */
> + RVTRACE_PMU_TYPE_CPUS,
> + RVTRACE_HEADER_MAX,
> +};
> +
> +/* Trace Encoder metadata */
> +enum {
> + RVTRACE_ENCODER_CPU,
> + RVTRACE_ENCODER_NR_TRC_PARAMS,
> + RVTRACE_ENCODER_FORMAT,
> + RVTRACE_ENCODER_CONTEXT,
> + RVTRACE_ENCODER_INHB_SRC,
> + RVTRACE_ENCODER_SRCBITS,
> + RVTRACE_ENCODER_SRCID,
> + RVTRACE_ENCODER_PRIV_MAX,
> +};
> +
> +#define RVTRACE_ENCODER_NR_TRC_PARAMS_LENGTH (RVTRACE_ENCODER_PRIV_MAX - RVTRACE_ENCODER_FORMAT)
> +
> +#define RVTRACE_HEADER_SIZE (RVTRACE_HEADER_MAX * sizeof(u64))
> +#define RVTRACE_ENCODER_PRIV_SIZE (RVTRACE_ENCODER_PRIV_MAX * sizeof(u64))
> +
> +#endif
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