Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Mostly tooling fixes, but also a couple of updates for new Intel
  models (which are technically hw-enablement, but to users it's a fix
  to perf behavior on those new CPUs - hope this is fine), an AUX
  inheritance fix, event time-sharing fix, and a fix for lost non-perf
  NMI events on AMD systems"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  perf/x86/cstate: Add Tiger Lake CPU support
  perf/x86/msr: Add Tiger Lake CPU support
  perf/x86/intel: Add Tiger Lake CPU support
  perf/x86/cstate: Update C-state counters for Ice Lake
  perf/x86/msr: Add new CPU model numbers for Ice Lake
  perf/x86/cstate: Add Comet Lake CPU support
  perf/x86/msr: Add Comet Lake CPU support
  perf/x86/intel: Add Comet Lake CPU support
  perf/x86/amd: Change/fix NMI latency mitigation to use a timestamp
  perf/core: Fix corner case in perf_rotate_context()
  perf/core: Rework memory accounting in perf_mmap()
  perf/core: Fix inheritance of aux_output groups
  perf annotate: Don't return -1 for error when doing BPF disassembly
  perf annotate: Return appropriate error code for allocation failures
  perf annotate: Fix arch specific ->init() failure errors
  perf annotate: Propagate the symbol__annotate() error return
  perf annotate: Fix the signedness of failure returns
  perf annotate: Propagate perf_env__arch() error
  perf evsel: Fall back to global 'perf_env' in perf_evsel__env()
  perf tools: Propagate get_cpuid() error
  ...

2 files changed, 9 insertions, 6 deletions

diff --git a/tools/perf/arch/s390/annotate/instructions.c b/tools/perf/arch/s390/annotate/instructions.c
index 89bb8f2c54ce..a50e70baf918 100644
--- a/tools/perf/arch/s390/annotate/instructions.c
+++ b/tools/perf/arch/s390/annotate/instructions.c
@@ -164,8 +164,10 @@ static int s390__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
 	if (!arch->initialized) {
 		arch->initialized = true;
 		arch->associate_instruction_ops = s390__associate_ins_ops;
-		if (cpuid)
-			err = s390__cpuid_parse(arch, cpuid);
+		if (cpuid) {
+			if (s390__cpuid_parse(arch, cpuid))
+				err = SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_CPUID_PARSING;
+		}
 	}
 
 	return err;
diff --git a/tools/perf/arch/s390/util/header.c b/tools/perf/arch/s390/util/header.c
index 8b0b018d896a..7933f6871c81 100644
--- a/tools/perf/arch/s390/util/header.c
+++ b/tools/perf/arch/s390/util/header.c
@@ -8,6 +8,7 @@
  */
 
 #include <sys/types.h>
+#include <errno.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <string.h>
@@ -54,7 +55,7 @@ int get_cpuid(char *buffer, size_t sz)
 
 	sysinfo = fopen(SYSINFO, "r");
 	if (sysinfo == NULL)
-		return -1;
+		return errno;
 
 	while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
 		if (!strncmp(line, SYSINFO_MANU, strlen(SYSINFO_MANU))) {
@@ -89,7 +90,7 @@ int get_cpuid(char *buffer, size_t sz)
 
 	/* Missing manufacturer, type or model information should not happen */
 	if (!manufacturer[0] || !type[0] || !model[0])
-		return -1;
+		return EINVAL;
 
 	/*
 	 * Scan /proc/service_levels and return the CPU-MF counter facility
@@ -133,14 +134,14 @@ skip_sysinfo:
 	else
 		nbytes = snprintf(buffer, sz, "%s,%s,%s", manufacturer, type,
 				  model);
-	return (nbytes >= sz) ? -1 : 0;
+	return (nbytes >= sz) ? ENOBUFS : 0;
 }
 
 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
 {
 	char *buf = malloc(128);
 
-	if (buf && get_cpuid(buf, 128) < 0)
+	if (buf && get_cpuid(buf, 128))
 		zfree(&buf);
 	return buf;
 }