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,USER_AGENT_GIT autolearn=ham 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 9231DC3A5A9 for ; Mon, 4 May 2020 09:30:20 +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 5CCF3206D9 for ; Mon, 4 May 2020 09:30:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gdgiYRld" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5CCF3206D9 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=obmFxcHPlKTprPtFzGIFqNUYT5jhNyLM8bKoayr53rs=; b=gdgiYRldzavARHPTo3+9oNg3l4 /F4wEyxuqfCUSD8zt/MYFWMxiAM6tpVAYjEIHbqcVDKy/E/Pr984HUVz4Wa3ZqvjLg6NpPhS7X+Yo 1w363qvEGeCV4OcELFPgsSmTWO5Ecv/KD4MNMuKnINCgxjtXsnNLALMNfJe+baSbMKBOqoIM1to3z qf6ydoMI7GHRXKnz4dThZ80/NWrn8rxha02jqCiRJqwmNnXGtG+SAfhiyioIPqEtJm4djTa9SOjpI f5lJU2ksrl20O+utjQI1gUfIOUAQoS213Ujq9JKGM+u/vLB9EEJJhilL3MEdH6u7TZBU5FWCxqoVa V+7+3hfA==; 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 1jVXQV-0003W4-Uj; Mon, 04 May 2020 09:30:16 +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 1jVXPb-0001uY-07 for linux-arm-kernel@lists.infradead.org; Mon, 04 May 2020 09:29:21 +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 6067111D4; Mon, 4 May 2020 02:29:18 -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 2C8233F305; Mon, 4 May 2020 02:29:17 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 4/5] firmware: psci: Add function to fetch SMCCC version Date: Mon, 4 May 2020 10:29:04 +0100 Message-Id: <20200504092905.10580-5-sudeep.holla@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200504092905.10580-1-sudeep.holla@arm.com> References: <20200504092905.10580-1-sudeep.holla@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200504_022919_081222_794D7C8A X-CRM114-Status: GOOD ( 10.43 ) 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 , 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 For backward compatibility reasons, PSCI maintains SMCCC version as SMCCC didn't provide ARM_SMCCC_VERSION_FUNC_ID until v1.1 Let us provide accessors to fetch the SMCCC version in PSCI so that other SMCCC v1.1+ features can use it. Signed-off-by: Sudeep Holla --- drivers/firmware/psci/psci.c | 5 +++++ include/linux/arm-smccc.h | 9 +++++++++ 2 files changed, 14 insertions(+) diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index 6a56d7196697..04426e16fee6 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -65,6 +65,11 @@ enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void) return psci_ops.conduit; } +u32 arm_smccc_get_version(void) +{ + return psci_ops.smccc_version; +} + typedef unsigned long (psci_fn)(unsigned long, unsigned long, unsigned long, unsigned long); static psci_fn *invoke_psci_fn; diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 9d9a2e42e919..d6b0f4acc707 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -98,6 +98,15 @@ enum arm_smccc_conduit { */ enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void); +/** + * arm_smccc_get_version() + * + * Returns the version to be used for SMCCCv1.1 or later. + * + * When SMCCCv1.1 or above is not present, assumes and returns SMCCCv1.0. + */ +u32 arm_smccc_get_version(void); + /** * struct arm_smccc_res - Result from SMC/HVC call * @a0-a3 result values from registers 0 to 3 -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel