Merge tag 'perf-tools-2020-12-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools updates from Arnaldo Carvalho de Melo:
 "perf record:
   - Fix memory leak when using '--user-regs=?' to list registers

  aarch64 support:
   - Add aarch64 registers to 'perf record's' --user-regs command line
     option

  aarch64 hw tracing support:
   - Decode memory tagging properties
   - Improve ARM's auxtrace support
   - Add support for ARMv8.3-SPE

  perf kvm:
   - Add kvm-stat for arm64

  perf stat:
   - Add --quiet option

  Cleanups:
   - Fixup function names wrt what is in libperf and what is in
     tools/perf

  Build:
   - Allow building without libbpf in older systems

  New kernel features:
   - Initial support for data/code page size sample type, more to come

  perf annotate:
   - Support MIPS instruction extended support

  perf stack unwinding:
   - Fix separate debug info files when using elfutils' libdw's unwinder

  perf vendor events:
   - Update Intel's Skylake client events to v50
   - Add JSON metrics for ARM's imx8mm DDR Perf
   - Support printing metric groups for system PMUs

  perf build id:
   - Prep work for supporting having the build id provided by the kernel
     in PERF_RECORD_MMAP2 metadata events

  perf stat:
   - Support regex pattern in --for-each-cgroup

  pipe mode:
   - Allow to use stdio functions for pipe mode
   - Support 'perf report's' --header-only for pipe mode
   - Support pipe mode display in 'perf evlist'

  Documentation:
   - Update information about CAP_PERFMON"

* tag 'perf-tools-2020-12-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (134 commits)
  perf mem: Factor out a function to generate sort order
  perf sort: Add sort option for data page size
  perf script: Support data page size
  tools headers UAPI: Update asm-generic/unistd.h
  tools headers cpufeatures: Sync with the kernel sources
  tools headers UAPI: Sync linux/prctl.h with the kernel sources
  tools headers UAPI: Sync linux/fscrypt.h with the kernel sources
  tools headers UAPI: Sync linux/const.h with the kernel headers
  tools arch x86: Sync the msr-index.h copy with the kernel sources
  perf trace beauty: Update copy of linux/socket.h with the kernel sources
  tools headers: Update linux/ctype.h with the kernel sources
  tools headers: Add conditional __has_builtin()
  tools headers: Get tools's linux/compiler.h closer to the kernel's
  tools headers UAPI: Sync linux/stat.h with the kernel sources
  tools headers: Syncronize linux/build_bug.h with the kernel sources
  perf tools: Reformat record's control fd man text
  perf config: Fix example command in manpage to conform to syntax specified in the SYNOPSIS section.
  perf test: Make sample-parsing test aware of PERF_SAMPLE_{CODE,DATA}_PAGE_SIZE
  perf tools: Add support to read build id from compressed elf
  perf debug: Add debug_set_file function
  ...

1 files changed, 29 insertions, 16 deletions

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 55c11e854fe4..d786cf6b0cfa 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -11,8 +11,10 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
+#ifdef HAVE_LIBBPF_SUPPORT
 #include <bpf/libbpf.h>
 #include "bpf-event.h"
+#endif
 #include "compress.h"
 #include "env.h"
 #include "namespaces.h"
@@ -277,18 +279,12 @@ bool dso__needs_decompress(struct dso *dso)
 		dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
 }
 
-static int decompress_kmodule(struct dso *dso, const char *name,
-			      char *pathname, size_t len)
+int filename__decompress(const char *name, char *pathname,
+			 size_t len, int comp, int *err)
 {
 	char tmpbuf[] = KMOD_DECOMP_NAME;
 	int fd = -1;
 
-	if (!dso__needs_decompress(dso))
-		return -1;
-
-	if (dso->comp == COMP_ID__NONE)
-		return -1;
-
 	/*
 	 * We have proper compression id for DSO and yet the file
 	 * behind the 'name' can still be plain uncompressed object.
@@ -302,17 +298,17 @@ static int decompress_kmodule(struct dso *dso, const char *name,
 	 * To keep this transparent, we detect this and return the file
 	 * descriptor to the uncompressed file.
 	 */
-	if (!compressions[dso->comp].is_compressed(name))
+	if (!compressions[comp].is_compressed(name))
 		return open(name, O_RDONLY);
 
 	fd = mkstemp(tmpbuf);
 	if (fd < 0) {
-		dso->load_errno = errno;
+		*err = errno;
 		return -1;
 	}
 
-	if (compressions[dso->comp].decompress(name, fd)) {
-		dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE;
+	if (compressions[comp].decompress(name, fd)) {
+		*err = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE;
 		close(fd);
 		fd = -1;
 	}
@@ -326,6 +322,19 @@ static int decompress_kmodule(struct dso *dso, const char *name,
 	return fd;
 }
 
+static int decompress_kmodule(struct dso *dso, const char *name,
+			      char *pathname, size_t len)
+{
+	if (!dso__needs_decompress(dso))
+		return -1;
+
+	if (dso->comp == COMP_ID__NONE)
+		return -1;
+
+	return filename__decompress(name, pathname, len, dso->comp,
+				    &dso->load_errno);
+}
+
 int dso__decompress_kmodule_fd(struct dso *dso, const char *name)
 {
 	return decompress_kmodule(dso, name, NULL, 0);
@@ -728,6 +737,7 @@ bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
 	return false;
 }
 
+#ifdef HAVE_LIBBPF_SUPPORT
 static ssize_t bpf_read(struct dso *dso, u64 offset, char *data)
 {
 	struct bpf_prog_info_node *node;
@@ -765,6 +775,7 @@ static int bpf_size(struct dso *dso)
 	dso->data.file_size = node->info_linear->info.jited_prog_len;
 	return 0;
 }
+#endif // HAVE_LIBBPF_SUPPORT
 
 static void
 dso_cache__free(struct dso *dso)
@@ -894,10 +905,12 @@ static struct dso_cache *dso_cache__populate(struct dso *dso,
 		*ret = -ENOMEM;
 		return NULL;
 	}
-
+#ifdef HAVE_LIBBPF_SUPPORT
 	if (dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO)
 		*ret = bpf_read(dso, cache_offset, cache->data);
-	else if (dso->binary_type == DSO_BINARY_TYPE__OOL)
+	else
+#endif
+	if (dso->binary_type == DSO_BINARY_TYPE__OOL)
 		*ret = DSO__DATA_CACHE_SIZE;
 	else
 		*ret = file_read(dso, machine, cache_offset, cache->data);
@@ -1018,10 +1031,10 @@ int dso__data_file_size(struct dso *dso, struct machine *machine)
 
 	if (dso->data.status == DSO_DATA_STATUS_ERROR)
 		return -1;
-
+#ifdef HAVE_LIBBPF_SUPPORT
 	if (dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO)
 		return bpf_size(dso);
-
+#endif
 	return file_size(dso, machine);
 }