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authorAlexander Shishkin <alexander.shishkin@linux.intel.com>2015-01-14 14:18:12 +0200
committerIngo Molnar <mingo@kernel.org>2015-04-02 17:14:08 +0200
commit0a4e38e64f5e91ce131cc42ee5bb3925377ec840 (patch)
tree726e06adcb05c8e44e93ad072fdcba6be38450e3 /include/linux/perf_event.h
parent45bfb2e50471abbbfd83d40d28c986078b0d24ff (diff)
perf: Support high-order allocations for AUX space
Some pmus (such as BTS or Intel PT without multiple-entry ToPA capability) don't support scatter-gather and will prefer larger contiguous areas for their output regions. This patch adds a new pmu capability to request higher order allocations. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kaixu Xia <kaixu.xia@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Robert Richter <rric@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@infradead.org Cc: adrian.hunter@intel.com Cc: kan.liang@intel.com Cc: markus.t.metzger@intel.com Cc: mathieu.poirier@linaro.org Link: http://lkml.kernel.org/r/1421237903-181015-4-git-send-email-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r--include/linux/perf_event.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 5a94f6d6fa91..d5a4a8e95808 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -174,6 +174,7 @@ struct perf_event;
*/
#define PERF_PMU_CAP_NO_INTERRUPT 0x01
#define PERF_PMU_CAP_NO_NMI 0x02
+#define PERF_PMU_CAP_AUX_NO_SG 0x04
/**
* struct pmu - generic performance monitoring unit