From patchwork Thu Apr 11 06:48:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liao Chang X-Patchwork-Id: 13625476 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C4D0FCD128A for ; Thu, 11 Apr 2024 06:55:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=EA21vhInJzK1SMlIgyyev2edMBa4xxwcfAvZ4X9ie4c=; b=YZ83ex7jVvOqcA ODon4dsafKEVc5FBmxkPLsl+DnxzBEi0vxA8VB0blzRP5j9zhUFsCOOwgqPq/5uU++RDtYfXKrbnK 6YaVei76yCq6d93F5DkDNSvQmiNfq8QBOH0BAJeo97xfkUsRzbzEm2mlfR/Ocw1nsLwjxtQTnCjnj RdfMbxP6T1DOfYPnS172hDHqjgVxoNmSuOVss8exrZ/pzXiGNtem91Hw2d70YSAD4r5/lnVrnHEBR ZDOyhlRGerv6Cnc19YvfPLYJXEr3hQcTKEC1mIWfv8Feyfr2C2tw4NGlhGRZfzRzYoImr+jls0ig1 VXISY1/HFSrYV6oxDomw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1ruoLK-0000000AgfC-3TkO; Thu, 11 Apr 2024 06:55:30 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1ruoLE-0000000AgX3-33Y6 for linux-arm-kernel@lists.infradead.org; Thu, 11 Apr 2024 06:55:27 +0000 Received: from mail.maildlp.com (unknown [172.19.88.163]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4VFVkK334mz2NW77; Thu, 11 Apr 2024 14:52:25 +0800 (CST) Received: from kwepemd200013.china.huawei.com (unknown [7.221.188.133]) by mail.maildlp.com (Postfix) with ESMTPS id D39C9180063; Thu, 11 Apr 2024 14:55:17 +0800 (CST) Received: from huawei.com (10.67.174.28) by kwepemd200013.china.huawei.com (7.221.188.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Thu, 11 Apr 2024 14:55:16 +0800 From: Liao Chang To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , Subject: [PATCH v2 3/9] arm64/nmi: Add Kconfig for NMI Date: Thu, 11 Apr 2024 06:48:52 +0000 Message-ID: <20240411064858.3232574-4-liaochang1@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240411064858.3232574-1-liaochang1@huawei.com> References: <20240411064858.3232574-1-liaochang1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.174.28] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemd200013.china.huawei.com (7.221.188.133) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240410_235525_254567_5537C8A4 X-CRM114-Status: UNSURE ( 9.52 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Mark Brown Since NMI handling is in some fairly hot paths we provide a Kconfig option which allows support to be compiled out when not needed. Signed-off-by: Mark Brown Signed-off-by: Liao Chang --- arch/arm64/Kconfig | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 7b11c98b3e84..c7d00d0cae9e 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -2095,6 +2095,23 @@ config ARM64_EPAN if the cpu does not implement the feature. endmenu # "ARMv8.7 architectural features" +menu "ARMv8.8 architectural features" + +config ARM64_NMI + bool "Enable support for Non-maskable Interrupts (NMI)" + default y + help + Non-maskable interrupts are an architecture and GIC feature + which allow the system to configure some interrupts to be + configured to have superpriority, allowing them to be handled + before other interrupts and masked for shorter periods of time. + + The feature is detected at runtime, and will remain disabled + if the cpu does not implement the feature. It will also be + disabled if pseudo NMIs are enabled at runtime. + +endmenu # "ARMv8.8 architectural features" + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y