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[3/3] arm64: Kconfig: Add support for the Perf NMI

Message ID 20200516124857.75004-4-lecopzer@gmail.com (mailing list archive)
State New, archived
Headers show
Series arm64: perf: Add support for Perf NMI interrupts | expand

Commit Message

Lecopzer Chen May 16, 2020, 12:48 p.m. UTC 
This is an extending function for Pseudo NMI that registering
Perf events interrupts as NMI.

It's helpful for sampling irq-off context when using perf.

Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
---
 arch/arm64/Kconfig | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 40fb05d96c60..f89c169771a0 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1679,6 +1679,16 @@  config ARM64_PSEUDO_NMI
 	  If unsure, say N
 
 if ARM64_PSEUDO_NMI
+config ARM64_PSEUDO_NMI_PERF
+	bool "Register Perf interrupts as Pseudo NMI"
+	depends on HW_PERF_EVENTS
+	depends on ARM_PMU
+	select HAVE_PERF_EVENTS_NMI
+	help
+	  This registers Perf interrupts to NMI when Pseudo NMI is active.
+	  This option is helpful when you need to debug any context disabled
+	  irq and get more inforamtion.
+
+	  If unsure, say N
+
 config ARM64_DEBUG_PRIORITY_MASKING
 	bool "Debug interrupt priority masking"
 	help