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[61.228.240.171]) by smtp.gmail.com with ESMTPSA id k27sm3768323pgb.30.2020.05.16.05.50.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 May 2020 05:50:14 -0700 (PDT) From: Lecopzer Chen To: linux-kernel@vger.kernel.org Cc: lecopzer.chen@mediatek.com, linux-arm-kernel@lists.infradead.org, matthias.bgg@gmail.com, catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, mingo@redhat.com, acme@kernel.org, jolsa@redhat.com, namhyung@kernel.org, linux-mediatek@lists.infradead.org, alexander.shishkin@linux.intel.com, peterz@infradead.org, yj.chiang@mediatek.com, Lecopzer Chen Subject: [PATCH 3/3] arm64: Kconfig: Add support for the Perf NMI Date: Sat, 16 May 2020 20:48:57 +0800 Message-Id: <20200516124857.75004-4-lecopzer@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200516124857.75004-1-lecopzer@gmail.com> References: <20200516124857.75004-1-lecopzer@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- arch/arm64/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) 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 -- 2.25.1