From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B7BAEC433E0 for ; Mon, 18 May 2020 09:12:40 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 84A2B207D8 for ; Mon, 18 May 2020 09:12:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="CoTQM3EH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 84A2B207D8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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=wGfvHood9bRsVt2lMmPDqgXPFqK/CpmO00zrrERKYA0=; b=CoTQM3EHa67YFybZAI5yRny3jd 59P4Z3J0IrVaLTiEI4iEAh1qmO5fmL9R4rdceOKqnqzTN3wZCD6sfxkb4ZO3dc12YmqgvtrlHE3jj XYnMiTsnHg7o4S+JqQWTbZDp3/cBp83HeeWrRQBHc+NRfPZygrgntZxHBj32zZRq74yxua4NKJLFi ZsKZpuWQabjk6qQMpzmC3mpAOd1SBY1HtrNnmYgXJc3b+GSNFl2eJzDkNUiH57L45fsLp478IH3Hc PhbOoywkU0L703ffMiMXpRyyImGSv27mW4oMngdzB+CVplf4sViB6UTYQ1sc80mnwtFS/sm6JLGUh 62/ButPQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jabp9-0005uy-Il; Mon, 18 May 2020 09:12:39 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jaboz-0005lA-VJ for linux-arm-kernel@lists.infradead.org; Mon, 18 May 2020 09:12:31 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 477EC11FB; Mon, 18 May 2020 02:12:29 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id ED0C93F68F; Mon, 18 May 2020 02:12:27 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 1/7] firmware: smccc: Add HAVE_ARM_SMCCC_DISCOVERY to identify SMCCC v1.1 and above Date: Mon, 18 May 2020 10:12:16 +0100 Message-Id: <20200518091222.27467-2-sudeep.holla@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200518091222.27467-1-sudeep.holla@arm.com> References: <20200518091222.27467-1-sudeep.holla@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200518_021230_048700_FBFEA9D2 X-CRM114-Status: GOOD ( 12.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Lorenzo Pieralisi , Arnd Bergmann , Catalin Marinas , linux-kernel@vger.kernel.org, Steven Price , harb@amperecomputing.com, Sudeep Holla , Will Deacon MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org SMCCC v1.0 lacked discoverability of version and features. To accelerate adoption of few mitigations and protect systems more rapidly from various vulnerability, PSCI v1.0 was updated to add SMCCC discovery mechanism though the PSCI firmware implementation of PSCI_FEATURES(SMCCC_VERSION) which returns success on firmware compliant to SMCCC v1.1 and above. This inturn makes SMCCC v1.1 and above dependent on ARM_PSCI_FW for backward compatibility. Let us introduce a new hidden config for the same to build more features on top of SMCCC v1.1 and above. While at it, also sort alphabetically the psci entry. Tested-by: Etienne Carriere Reviewed-by: Etienne Carriere Acked-by: Mark Rutland Signed-off-by: Sudeep Holla --- drivers/firmware/Kconfig | 6 ++---- drivers/firmware/smccc/Kconfig | 16 ++++++++++++++++ 2 files changed, 18 insertions(+), 4 deletions(-) create mode 100644 drivers/firmware/smccc/Kconfig diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 8007d4aa76dc..4843e94713a4 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -295,15 +295,13 @@ config TURRIS_MOX_RWTM other manufacturing data and also utilize the Entropy Bit Generator for hardware random number generation. -config HAVE_ARM_SMCCC - bool - -source "drivers/firmware/psci/Kconfig" source "drivers/firmware/broadcom/Kconfig" source "drivers/firmware/google/Kconfig" source "drivers/firmware/efi/Kconfig" source "drivers/firmware/imx/Kconfig" source "drivers/firmware/meson/Kconfig" +source "drivers/firmware/psci/Kconfig" +source "drivers/firmware/smccc/Kconfig" source "drivers/firmware/tegra/Kconfig" source "drivers/firmware/xilinx/Kconfig" diff --git a/drivers/firmware/smccc/Kconfig b/drivers/firmware/smccc/Kconfig new file mode 100644 index 000000000000..27b675d76235 --- /dev/null +++ b/drivers/firmware/smccc/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0-only +config HAVE_ARM_SMCCC + bool + help + Include support for the Secure Monitor Call (SMC) and Hypervisor + Call (HVC) instructions on Armv7 and above architectures. + +config HAVE_ARM_SMCCC_DISCOVERY + bool + depends on ARM_PSCI_FW + default y + help + SMCCC v1.0 lacked discoverability and hence PSCI v1.0 was updated + to add SMCCC discovery mechanism though the PSCI firmware + implementation of PSCI_FEATURES(SMCCC_VERSION) which returns + success on firmware compliant to SMCCC v1.1 and above. -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel