diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2018-11-06 23:07:10 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-12-17 14:54:07 -0300 |
| commit | ec1891afae740be581ecf5abc8bda74c4549203f (patch) | |
| tree | c149a4b9797127900933cab6b20b09841660e510 /tools/perf/arch/common.h | |
| parent | 804234f27180dcf9a25cb98a88d5212f65b7f3fd (diff) | |
| download | lwn-ec1891afae740be581ecf5abc8bda74c4549203f.tar.gz lwn-ec1891afae740be581ecf5abc8bda74c4549203f.zip | |
perf machine: Record if a arch has a single user/kernel address space
Some architectures have a single address space for kernel and user
addresses, which makes it possible to determine if an address is in
kernel space or user space. Some don't, e.g.: sparc.
Cache that info in perf_env so that, for instance, code needing to
fallback failed symbol lookups at the kernel space in single address
space arches can lookup at userspace.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: stable@vger.kernel.org # 4.19
Link: http://lkml.kernel.org/r/20181106210712.12098-2-adrian.hunter@intel.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch/common.h')
| -rw-r--r-- | tools/perf/arch/common.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/arch/common.h b/tools/perf/arch/common.h index 2167001b18c5..c298a446d1f6 100644 --- a/tools/perf/arch/common.h +++ b/tools/perf/arch/common.h @@ -5,5 +5,6 @@ #include "../util/env.h" int perf_env__lookup_objdump(struct perf_env *env, const char **path); +bool perf_env__single_address_space(struct perf_env *env); #endif /* ARCH_PERF_COMMON_H */ |