From nobody Mon Apr 6 21:33:52 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9F90C54EE9 for ; Wed, 7 Sep 2022 14:53:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230181AbiIGOxa (ORCPT ); Wed, 7 Sep 2022 10:53:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230051AbiIGOxU (ORCPT ); Wed, 7 Sep 2022 10:53:20 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4191EB0B24 for ; Wed, 7 Sep 2022 07:52:58 -0700 (PDT) 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 723911477; Wed, 7 Sep 2022 07:53:04 -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 D09873F71A; Wed, 7 Sep 2022 07:52:56 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, op-tee@lists.trustedfirmware.org Cc: Sudeep Holla , Marc Bonnici , Achin Gupta , Jens Wiklander , Valentin Laurent , Lukas Hanel , Coboy Chen Subject: [PATCH v3 09/10] firmware: arm_ffa: Set up 32bit execution mode flag using partiion property Date: Wed, 7 Sep 2022 15:52:39 +0100 Message-Id: <20220907145240.1683088-10-sudeep.holla@arm.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220907145240.1683088-1-sudeep.holla@arm.com> References: <20220907145240.1683088-1-sudeep.holla@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" FF-A v1.1 adds a flag in the partition properties to indicate if the partition runs in the AArch32 or AArch64 execution state. Use the same to set-up the 32-bit execution flag mode in the ffa_dev automatically and ignore any requests to do the same from the ffa_driver. Signed-off-by: Sudeep Holla --- drivers/firmware/arm_ffa/driver.c | 13 ++++++++++++- include/linux/arm_ffa.h | 2 ++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/d= river.c index 42bc22220c69..34e12a2a98fe 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -648,11 +648,19 @@ static int ffa_partition_info_get(const char *uuid_st= r, return 0; } =20 -static void ffa_mode_32bit_set(struct ffa_device *dev) +static void _ffa_mode_32bit_set(struct ffa_device *dev) { dev->mode_32bit =3D true; } =20 +static void ffa_mode_32bit_set(struct ffa_device *dev) +{ + if (drv_info->version > FFA_VERSION_1_0) + return; + + _ffa_mode_32bit_set(dev); +} + static int ffa_sync_send_receive(struct ffa_device *dev, struct ffa_send_direct_data *data) { @@ -744,6 +752,9 @@ static void ffa_setup_partitions(void) __func__, tpbuf->id); continue; } + + if (!(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC)) + _ffa_mode_32bit_set(ffa_dev); } kfree(pbuf); } diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index 09567ffd1f49..5964b6104996 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -106,6 +106,8 @@ struct ffa_partition_info { #define FFA_PARTITION_DIRECT_SEND BIT(1) /* partition can send and receive indirect messages. */ #define FFA_PARTITION_INDIRECT_MSG BIT(2) +/* partition runs in the AArch64 execution state. */ +#define FFA_PARTITION_AARCH64_EXEC BIT(8) u32 properties; u32 uuid[4]; }; --=20 2.37.3