From patchwork Mon May 2 15:22:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= X-Patchwork-Id: 12834306 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 ED642C433F5 for ; Mon, 2 May 2022 15:25:13 +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=GAzT49tfFwyp61KkYj78vBTp0M7IgLjrOA3MQka/nGc=; b=JNsAOdqEciZKT+ rTDodbN+V2F7bd2MKDVsC4Va1PNnP9ko+B2pW2Pr+jjOg6+mreT8V/tAA1o7VQ/rJ9Svl3IbJuMtY mTsdXqYHOyC79BNzCYj2BzRvdB5CaaHW5owXKprCWKjg10QKU8UvpdQHpPVuzSAs/Ec34UFK6kCF0 B266DUtTyXRKjqz5UAFP4tIuHOMol1upWhiPJUTXR0bcnypRsQlg09P5wumXCM7/NV8TQB/cNjWvK kBI5HamQpdlJDNMzy1/h1d2oI0OAGy+k515IPuARTy/45Cnqjmo5LNtC4HIt5p/wrje4ZP4lRGoye RH5+lsMQQ0vw622vIjGg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nlXuG-001UO4-8E; Mon, 02 May 2022 15:24:12 +0000 Received: from relay1-d.mail.gandi.net ([2001:4b98:dc4:8::221]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nlXto-001UBf-1Y for linux-arm-kernel@lists.infradead.org; Mon, 02 May 2022 15:23:52 +0000 Received: (Authenticated sender: clement.leger@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 39548240004; Mon, 2 May 2022 15:23:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1651505017; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4TZJ67Qf5npxgRoNb/48DKjrSfSErIPD2XpuA2RT2wg=; b=EVMm6S6AgU3AzldZff9PeF8IJgqpp6sNTnF4puLTECYqHMJFbvvUOTsobpOXJ8LCeAp0lR OVif4WVfeMEpxedo3J3vTva0KoGGD7uAlMY0aM94w83frxyNElsdQ58wgvSOW4iBOCMkbb Knh/Y7K9171lJVd9G9iGbsOAM6Ty6B7ykQ3vaoNvXQ1VUtG2y1sDCUihdws6ydvy2/un+k 9nvdOPfnBsZJl80mCgnI/Am3OsmWHaa14SH6MK5d8PAVW7dlTT6EygGzjozayw/v86s03z dQIOojhuvbYr7xSGR09HCjB39ORfnEI5aZxJyW1Op85yJvSIDtyYx1yLInZR2A== From: =?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= To: Russell King , Nicolas Ferre , Alexandre Belloni , Ludovic Desroches Cc: =?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Thomas Petazzoni Subject: [PATCH v3 1/2] ARM: at91: add code to handle secure calls Date: Mon, 2 May 2022 17:22:18 +0200 Message-Id: <20220502152219.216758-2-clement.leger@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220502152219.216758-1-clement.leger@bootlin.com> References: <20220502152219.216758-1-clement.leger@bootlin.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220502_082344_416651_19BA65DD X-CRM114-Status: GOOD ( 20.26 ) 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 Since OP-TEE now has a more complete support for sama5d2, add necessary code to perform SMC calls. The detection of OP-TEE is based on a specific device-tree node path (/firmware/optee) such has done by some other SoC. A check is added to avoid doing SMC calls without having OP-TEE. Signed-off-by: Clément Léger --- arch/arm/mach-at91/Makefile | 2 +- arch/arm/mach-at91/sam_secure.c | 46 +++++++++++++++++++++++++++++++++ arch/arm/mach-at91/sam_secure.h | 14 ++++++++++ arch/arm/mach-at91/sama5.c | 2 ++ 4 files changed, 63 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-at91/sam_secure.c create mode 100644 arch/arm/mach-at91/sam_secure.h diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile index 522b680b6446..0dcc37180588 100644 --- a/arch/arm/mach-at91/Makefile +++ b/arch/arm/mach-at91/Makefile @@ -7,7 +7,7 @@ obj-$(CONFIG_SOC_AT91RM9200) += at91rm9200.o obj-$(CONFIG_SOC_AT91SAM9) += at91sam9.o obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o -obj-$(CONFIG_SOC_SAMA5) += sama5.o +obj-$(CONFIG_SOC_SAMA5) += sama5.o sam_secure.o obj-$(CONFIG_SOC_SAMA7) += sama7.o obj-$(CONFIG_SOC_SAMV7) += samv7.o diff --git a/arch/arm/mach-at91/sam_secure.c b/arch/arm/mach-at91/sam_secure.c new file mode 100644 index 000000000000..2a01f7a7d13f --- /dev/null +++ b/arch/arm/mach-at91/sam_secure.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2022, Microchip + */ + +#include +#include + +#include "sam_secure.h" + +static bool optee_available; + +#define SAM_SIP_SMC_STD_CALL_VAL(func_num) \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_SIP, (func_num)) + +struct arm_smccc_res sam_smccc_call(u32 fn, u32 arg0, u32 arg1) +{ + struct arm_smccc_res res = {.a0 = -1}; + + if (WARN_ON(!optee_available)) + return res; + + arm_smccc_smc(SAM_SIP_SMC_STD_CALL_VAL(fn), arg0, arg1, 0, 0, 0, 0, 0, + &res); + + return res; +} + +void __init sam_secure_init(void) +{ + struct device_node *np; + + /* + * We only check that the OP-TEE node is present and available. The + * OP-TEE kernel driver is not needed for the type of interaction made + * with OP-TEE here so the driver's status is not checked. + */ + np = of_find_node_by_path("/firmware/optee"); + if (np && of_device_is_available(np)) + optee_available = true; + of_node_put(np); + + if (optee_available) + pr_info("Running under OP-TEE firmware\n"); +} diff --git a/arch/arm/mach-at91/sam_secure.h b/arch/arm/mach-at91/sam_secure.h new file mode 100644 index 000000000000..360036672f52 --- /dev/null +++ b/arch/arm/mach-at91/sam_secure.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2022, Microchip + */ + +#ifndef SAM_SECURE_H +#define SAM_SECURE_H + +#include + +void __init sam_secure_init(void); +struct arm_smccc_res sam_smccc_call(u32 fn, u32 arg0, u32 arg1); + +#endif /* SAM_SECURE_H */ diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c index 89dab7cf01e8..de5dd28b392e 100644 --- a/arch/arm/mach-at91/sama5.c +++ b/arch/arm/mach-at91/sama5.c @@ -14,6 +14,7 @@ #include #include "generic.h" +#include "sam_secure.h" static void __init sama5_dt_device_init(void) { @@ -47,6 +48,7 @@ MACHINE_END static void __init sama5d2_init(void) { of_platform_default_populate(NULL, NULL, NULL); + sam_secure_init(); sama5d2_pm_init(); }