#ifndef __PERF_HEADER_H #define __PERF_HEADER_H #include #include #include #include #include #include "event.h" #include "env.h" enum { HEADER_RESERVED = 0, /* always cleared */ HEADER_FIRST_FEATURE = 1, HEADER_TRACING_DATA = 1, HEADER_BUILD_ID, HEADER_HOSTNAME, HEADER_OSRELEASE, HEADER_VERSION, HEADER_ARCH, HEADER_NRCPUS, HEADER_CPUDESC, HEADER_CPUID, HEADER_TOTAL_MEM, HEADER_CMDLINE, HEADER_EVENT_DESC, HEADER_CPU_TOPOLOGY, HEADER_NUMA_TOPOLOGY, HEADER_BRANCH_STACK, HEADER_PMU_MAPPINGS, HEADER_GROUP_DESC, HEADER_AUXTRACE, HEADER_STAT, HEADER_CACHE, HEADER_LAST_FEATURE, HEADER_FEAT_BITS = 256, }; enum perf_header_version { PERF_HEADER_VERSION_1, PERF_HEADER_VERSION_2, }; struct perf_file_section { u64 offset; u64 size; }; struct perf_file_header { u64 magic; u64 size; u64 attr_size; struct perf_file_section attrs; struct perf_file_section data; /* event_types is ignored */ struct perf_file_section event_types; DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); }; struct perf_pipe_file_header { u64 magic; u64 size; }; struct perf_header; int perf_file_header__read(struct perf_file_header *header, struct perf_header *ph, int fd); struct perf_header { enum perf_header_version version; bool needs_swap; u64 data_offset; u64 data_size; u64 feat_offset; DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); struct perf_env env; }; struct perf_evlist; struct perf_session; int perf_session__read_header(struct perf_session *session); int perf_session__write_header(struct perf_session *session, struct perf_evlist *evlist, int fd, bool at_exit); int perf_header__write_pipe(int fd); void perf_header__set_feat(struct perf_header *header, int feat); void perf_header__clear_feat(struct perf_header *header, int feat); bool perf_header__has_feat(const struct perf_header *header, int feat); int perf_header__set_cmdline(int argc, const char **argv); int perf_header__process_sections(struct perf_header *header, int fd, void *data, int (*process)(struct perf_file_section *section, struct perf_header *ph, int feat, int fd, void *data)); int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr, u32 ids, u64 *id, perf_event__handler_t process); int perf_event__synthesize_attrs(struct perf_tool *tool, struct perf_session *session, perf_event__handler_t process); int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__process_attr(struct perf_tool *tool, union perf_event *event, struct perf_evlist **pevlist); int perf_event__process_event_update(struct perf_tool *tool, union perf_event *event, struct perf_evlist **pevlist); size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp); int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct perf_evlist *evlist, perf_event__handler_t process); int perf_event__process_tracing_data(struct perf_tool *tool, union perf_event *event, struct perf_session *session); int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc, perf_event__handler_t process, struct machine *machine); int perf_event__process_build_id(struct perf_tool *tool, union perf_event *event, struct perf_session *session); bool is_perf_magic(u64 magic); #define NAME_ALIGN 64 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned); /* * arch specific callback */ int get_cpuid(char *buffer, size_t sz); char *get_cpuid_str(void); #endif /* __PERF_HEADER_H */ n value='9'>9space:mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /tools/perf/Documentation/perf-kvm.txt
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/perf/Documentation/perf-kvm.txt')