From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965773AbeEYJxB (ORCPT ); Fri, 25 May 2018 05:53:01 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:57632 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966133AbeEYJur (ORCPT ); Fri, 25 May 2018 05:50:47 -0400 From: Julien Thierry To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, daniel.thompson@linaro.org, joel@joelfernandes.org, marc.zyngier@arm.com, mark.rutland@arm.com, christoffer.dall@arm.com, james.morse@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, Julien Thierry Subject: [PATCH v4 21/26] arm64: Add build option for IRQ masking via priority Date: Fri, 25 May 2018 10:49:27 +0100 Message-Id: <1527241772-48007-22-git-send-email-julien.thierry@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1527241772-48007-1-git-send-email-julien.thierry@arm.com> References: <1527241772-48007-1-git-send-email-julien.thierry@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide a build option to enable using GICv3 priorities to enable/disable interrupts. Signed-off-by: Julien Thierry Suggested-by: Daniel Thompson Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/Kconfig | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index eb2cf49..ab214b9 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -938,6 +938,21 @@ config HARDEN_EL2_VECTORS If unsure, say Y. +config USE_ICC_SYSREGS_FOR_IRQFLAGS + bool "Use ICC system registers for IRQ masking" + select CONFIG_ARM_GIC_V3 + help + Using the ICC system registers for IRQ masking makes it possible + to simulate NMI on ARM64 systems. This allows several interesting + features (especially debug features) to be used on these systems. + + Say Y here to implement IRQ masking using ICC system + registers when the GIC System Registers are available. The changes + are applied dynamically using the alternatives system so it is safe + to enable this option on systems with older interrupt controllers. + + If unsure, say N + menuconfig ARMV8_DEPRECATED bool "Emulate deprecated/obsolete ARMv8 instructions" depends on COMPAT -- 1.9.1