From f146c7bc85a51f95c05e0f8173d484eb301ece78 Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Thu, 13 Aug 2026 18:52:04 +0200 Subject: PCI: Add pci_irq_type() to query the allocated interrupt type Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX based on the interrupt type the PCI core selected after pci_alloc_irq_vectors(). Several drivers already open-code this check against pdev->msix_enabled and pdev->msi_enabled, or even open code this helper [1]. A common helper avoids the duplication and keeps drivers from accessing the bitfield directly (see also [2]). Acked-by: Bjorn Helgaas Tested-by: John Hubbard Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1] Inspired-by: John Hubbard Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2] Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org [ Add missing pci_irq_type() stub for CONFIG_PCI=n. ] Signed-off-by: Danilo Krummrich --- tools/perf/tests/openat-syscall-tp-fields.c | 163 ++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 tools/perf/tests/openat-syscall-tp-fields.c (limited to 'tools/perf/tests/openat-syscall-tp-fields.c') diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c new file mode 100644 index 000000000..9ff8caff9 --- /dev/null +++ b/tools/perf/tests/openat-syscall-tp-fields.c @@ -0,0 +1,163 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include "evlist.h" +#include "evsel.h" +#include "thread_map.h" +#include "record.h" +#include "tests.h" +#include "debug.h" +#include "util/mmap.h" +#include +#include +#include "util/sample.h" + +#ifndef O_DIRECTORY +#define O_DIRECTORY 00200000 +#endif +#ifndef AT_FDCWD +#define AT_FDCWD -100 +#endif + +static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + struct record_opts opts = { + .target = { + .uses_mmap = true, + }, + .no_buffering = true, + .freq = 1, + .mmap_pages = 256, + .raw_samples = true, + }; + const char *filename = "/etc/passwd"; + int flags = O_RDONLY | O_DIRECTORY; + struct evlist *evlist = evlist__new(); + struct evsel *evsel; + int ret = TEST_FAIL, err, i, nr_events = 0, nr_polls = 0; + char sbuf[STRERR_BUFSIZE]; + + if (evlist == NULL) { + pr_debug("%s: evlist__new\n", __func__); + goto out; + } + + evsel = evsel__newtp("syscalls", "sys_enter_openat"); + if (IS_ERR(evsel)) { + pr_debug("%s: evsel__newtp\n", __func__); + ret = PTR_ERR(evsel) == -EACCES ? TEST_SKIP : TEST_FAIL; + goto out_delete_evlist; + } + + evlist__add(evlist, evsel); + + err = evlist__create_maps(evlist, &opts.target); + if (err < 0) { + pr_debug("%s: evlist__create_maps\n", __func__); + goto out_delete_evlist; + } + + evsel__config(evsel, &opts, NULL); + + perf_thread_map__set_pid(evlist->core.threads, 0, getpid()); + + err = evlist__open(evlist); + if (err < 0) { + pr_debug("perf_evlist__open: %s\n", + str_error_r(errno, sbuf, sizeof(sbuf))); + goto out_delete_evlist; + } + + err = evlist__mmap(evlist, UINT_MAX); + if (err < 0) { + pr_debug("evlist__mmap: %s\n", + str_error_r(errno, sbuf, sizeof(sbuf))); + goto out_delete_evlist; + } + + evlist__enable(evlist); + + /* + * Generate the event: + */ + openat(AT_FDCWD, filename, flags); + + while (1) { + int before = nr_events; + + for (i = 0; i < evlist->core.nr_mmaps; i++) { + union perf_event *event; + struct mmap *md; + + md = &evlist->mmap[i]; + if (perf_mmap__read_init(&md->core) < 0) + continue; + + while ((event = perf_mmap__read_event(&md->core)) != NULL) { + const u32 type = event->header.type; + int tp_flags; + struct perf_sample sample; + + ++nr_events; + + if (type != PERF_RECORD_SAMPLE) { + perf_mmap__consume(&md->core); + continue; + } + + perf_sample__init(&sample, /*all=*/false); + err = evsel__parse_sample(evsel, event, &sample); + if (err) { + pr_debug("Can't parse sample, err = %d\n", err); + perf_sample__exit(&sample); + goto out_delete_evlist; + } + + tp_flags = perf_sample__intval(&sample, "flags"); + perf_sample__exit(&sample); + /* C library wrapper may set additional flags, + access mode must be unchanged */ + if ((tp_flags & O_ACCMODE) != (flags & O_ACCMODE) || + (tp_flags & flags) != flags) { + pr_debug("%s: Expected flags=%#x, got %#x\n", + __func__, flags, tp_flags); + goto out_delete_evlist; + } + + goto out_ok; + } + perf_mmap__read_done(&md->core); + } + + if (nr_events == before) + evlist__poll(evlist, 10); + + if (++nr_polls > 5) { + pr_debug("%s: no events!\n", __func__); + goto out_delete_evlist; + } + } +out_ok: + ret = TEST_OK; +out_delete_evlist: + evlist__delete(evlist); +out: + return ret; +} + +static struct test_case tests__syscall_openat_tp_fields[] = { + TEST_CASE_REASON("syscalls:sys_enter_openat event fields", + syscall_openat_tp_fields, + "permissions"), + { .name = NULL, } +}; + +struct test_suite suite__syscall_openat_tp_fields = { + .desc = "syscalls:sys_enter_openat event fields", + .test_cases = tests__syscall_openat_tp_fields, +}; -- cgit v1.3.1