From patchwork Tue Aug 28 15:51:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Thierry X-Patchwork-Id: 10578833 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C7A46920 for ; Tue, 28 Aug 2018 16:10:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B3A192A6F7 for ; Tue, 28 Aug 2018 16:10:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B157B2A717; Tue, 28 Aug 2018 16:10:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 331732A72E for ; Tue, 28 Aug 2018 16:10:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=dbXBylB9SRP08S6S4ODWrHaxm+POl8PPlSmh8iS8TSU=; b=BN9rs0mVLH9qW2Q/xJDAN88tI8 ndV5X5DMzH/TFCm9x/UAoaIY+W2EJNlckaWIHBiap7RT9SORw/q2AGZUb+A17H92OGAnS6HMcCCgb DkuNE6FsIX/J2R3EORMhcEq1yLX8IcRBdgBX3vjzP9YNT99mkQnLlnIHsa2vWuDE8mdmXzsuWmkkR JQTuKQtBszm/81G8Hcyox/UcOqB0iFJ2L4GTkxNl8pc1kQHmJWnA/brHZ7wcC/DNU04GO/DDPaRiG 2kLAB+xnbfWue54SPz1OG04vzfvRJ90Y8zIcwSp8ZJ0tyLuXud703Lo/A15H1nqpozZESwsDHxIPL 1AyK5L2g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fugZj-0000nA-Cy; Tue, 28 Aug 2018 16:10:39 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fugIY-0005RZ-Sc for linux-arm-kernel@lists.infradead.org; Tue, 28 Aug 2018 15:53:08 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 40CAA1684; Tue, 28 Aug 2018 08:52:40 -0700 (PDT) Received: from e112298-lin.Emea.Arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 52A6E3F557; Tue, 28 Aug 2018 08:52:38 -0700 (PDT) From: Julien Thierry To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 22/27] arm64: Add build option for IRQ masking via priority Date: Tue, 28 Aug 2018 16:51:32 +0100 Message-Id: <1535471497-38854-23-git-send-email-julien.thierry@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1535471497-38854-1-git-send-email-julien.thierry@arm.com> References: <1535471497-38854-1-git-send-email-julien.thierry@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180828_085255_116672_94F3BB26 X-CRM114-Status: GOOD ( 12.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, daniel.thompson@linaro.org, Julien Thierry , marc.zyngier@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, christoffer.dall@arm.com, james.morse@arm.com, joel@joelfernandes.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Provide a build option to enable using GICv3 priorities to enable/disable interrupts. Tested-by: Daniel Thompson Signed-off-by: Julien Thierry Suggested-by: Daniel Thompson Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/Kconfig | 15 +++++++++++++++ 1 file changed, 15 insertions(+) -- 1.9.1 diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 29e75b4..d09c6ff 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -944,6 +944,21 @@ config ARM64_SSBD 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