From patchwork Tue Nov 5 20:58:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ard Biesheuvel X-Patchwork-Id: 11228561 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4516716B1 for ; Tue, 5 Nov 2019 21:03:53 +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 2A3D321882 for ; Tue, 5 Nov 2019 21:03:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="PQ3bfwFd"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="N4Xycdk8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2A3D321882 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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=1ONF+GO4JrLj6CSAum2sQ0BFoGBnlhPpWXPQFXsDEHw=; b=PQ3bfwFdRbZ+KTG+rl4GMS/iDB 1wQMAzR8950FiA9gKVUjaNZWirYtie7qr5EwHEHB6wfi/nR8A6J6q1qmwasSmRfKtYaqqj60GL5R5 3mxZOsjFwP+ZBrBrAo6UnPeC8TlAau4Nmmattr9OVXZ9P3PlmHTtyJB99uITdrgKuIZPy8PNqqRHc HlO+7Sv8vZnlmdfedDzPTw/si5x3A+FtApsgRJfCcVDeBlUzLMfKwWsIZpn3kZmR1DjsOFdiBZB8n LlfpufYUSK6DN7xDI9DoulDkt6YjJTXpBqaBWKGAOZitZ8Y9k3ThIZzTVCs7fcPBks/7bBNFwVCvU IyEBxJoA==; 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 1iS5zU-0002Ue-ID; Tue, 05 Nov 2019 21:03:52 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iS5vY-0005y4-7b for linux-arm-kernel@lists.infradead.org; Tue, 05 Nov 2019 20:59:49 +0000 Received: from e123331-lin.home (lfbn-mar-1-643-104.w90-118.abo.wanadoo.fr [90.118.215.104]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DDBF8222C1; Tue, 5 Nov 2019 20:59:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572987587; bh=AyPjaueM99pKJyqnu/Jc0De/5m6c6Dzg5XK9jGRjCQw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N4Xycdk8nUie2VUHrICfALBAg9S2zKY3n/NyRs9a5q3d8bJHa34X5RmCgLY+dREtw m5mDbhCbDnb4e7bTaOZ3BK0xXBBDEsFLsuDPD/z7Q7I0VRkXlLAQcYGw1EKLzLN/i2 pDEgnO/FhMe3BmV6WiJrQL0bpmUA4EhyoRbbaAJ8= From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Subject: [PATCH for-stable-v4.4 17/53] arm/arm64: smccc: Add SMCCC-specific return codes Date: Tue, 5 Nov 2019 21:58:10 +0100 Message-Id: <20191105205846.1394-18-ardb@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191105205846.1394-1-ardb@kernel.org> References: <20191105205846.1394-1-ardb@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191105_125948_324776_68B25F8C X-CRM114-Status: UNSURE ( 9.92 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender 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 , Florian Fainelli , Greg Kroah-Hartman , Tony Lindgren , Catalin Marinas , Marc Zyngier , Russell King , Marc Zyngier , Will Deacon , Ard Biesheuvel MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Marc Zyngier commit eff0e9e1078ea7dc1d794dc50e31baef984c46d7 upstream. We've so far used the PSCI return codes for SMCCC because they were extremely similar. But with the new ARM DEN 0070A specification, "NOT_REQUIRED" (-2) is clashing with PSCI's "PSCI_RET_INVALID_PARAMS". Let's bite the bullet and add SMCCC specific return codes. Users can be repainted as and when required. Acked-by: Will Deacon Reviewed-by: Mark Rutland Signed-off-by: Marc Zyngier Signed-off-by: Catalin Marinas Signed-off-by: Marc Zyngier Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ard Biesheuvel --- include/linux/arm-smccc.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index a031897fca76..c89da86de99f 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -291,5 +291,10 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, */ #define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__) +/* Return codes defined in ARM DEN 0070A */ +#define SMCCC_RET_SUCCESS 0 +#define SMCCC_RET_NOT_SUPPORTED -1 +#define SMCCC_RET_NOT_REQUIRED -2 + #endif /*__ASSEMBLY__*/ #endif /*__LINUX_ARM_SMCCC_H*/