From patchwork Fri May 25 09:49:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Thierry X-Patchwork-Id: 10426871 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id EC65E601D5 for ; Fri, 25 May 2018 09:59:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E22C329622 for ; Fri, 25 May 2018 09:59:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D497029640; Fri, 25 May 2018 09:59:05 +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 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 3E24F29622 for ; Fri, 25 May 2018 09:59:05 +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=21tbCYarcAuUWAGmA5uHe5FyoSraUW7QDn3DVn1c/ow=; b=dzJXlCooubBasodjdaCdsPl0A+ BLvjhenst8/Gqi5j1AVmHnWMApTsX1cJwbPrLiM+L3GqUgn8Qs3FU0KckkcE0UZWCD6Z+uYs6xk4i Z4EJnT/bfsGQHb3/hyH6cKszn2f+HrYXKbrTNFFt9dkJLgpAS4aqAoC1nFsGV3UZCRPixKMmUt9Ld jEFj86ZYuffvZiszebFKIbw2fiq1c0r11alwvqsGNiBSDCdWmeDU2v7cd3qDRhBc4Zwl/xc/ZOvMT RXsOuJ+zj4WKHdHKCzZFnp9WwM2Y/tdeR4Mhgs/8beSevcB6nau4nE/oP8HGgHUATDzZcfDW+enuQ dn6EoDiw==; 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 1fM9Ut-000684-3l; Fri, 25 May 2018 09:58:55 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fM9N1-0007FU-6s for linux-arm-kernel@lists.infradead.org; Fri, 25 May 2018 09:50:52 +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 213DF1688; Fri, 25 May 2018 02:50:47 -0700 (PDT) Received: from e112298-lin.cambridge.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 203CB3F25D; Fri, 25 May 2018 02:50:44 -0700 (PDT) From: Julien Thierry To: linux-arm-kernel@lists.infradead.org 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180525_025047_374690_5CD7A380 X-CRM114-Status: GOOD ( 11.14 ) 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. 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