From patchwork Mon Apr 4 12:42:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 556048 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 2AA21C433FE for ; Mon, 4 Apr 2022 12:43:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229683AbiDDMpK (ORCPT ); Mon, 4 Apr 2022 08:45:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52836 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233970AbiDDMpK (ORCPT ); Mon, 4 Apr 2022 08:45:10 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7A55A3C4B8 for ; Mon, 4 Apr 2022 05:43:14 -0700 (PDT) Received: from fraeml740-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KX9PN5ZRBz686RQ; Mon, 4 Apr 2022 20:41:12 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml740-chm.china.huawei.com (10.206.15.221) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 4 Apr 2022 14:43:12 +0200 Received: from A2006125610.china.huawei.com (10.47.93.34) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 4 Apr 2022 13:43:04 +0100 From: Shameer Kolothum To: , , CC: , , , , , , , , , , , , Subject: [PATCH v9 02/11] iommu: Introduce a union to struct iommu_resv_region Date: Mon, 4 Apr 2022 13:42:00 +0100 Message-ID: <20220404124209.1086-3-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20220404124209.1086-1-shameerali.kolothum.thodi@huawei.com> References: <20220404124209.1086-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.93.34] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org A union is introduced to struct iommu_resv_region to hold any firmware specific data. This is in preparation to add support for IORT RMR reserve regions and the union now holds the RMR specific information. Signed-off-by: Shameer Kolothum --- include/linux/iommu.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 9208eca4b0d1..733f46b14ac8 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -127,6 +127,11 @@ enum iommu_resv_type { IOMMU_RESV_SW_MSI, }; +struct iommu_iort_rmr_data { + const u32 *sids; /* Stream IDs associated with IORT RMR entry */ + u32 num_sids; +}; + /** * struct iommu_resv_region - descriptor for a reserved memory region * @list: Linked list pointers @@ -134,6 +139,7 @@ enum iommu_resv_type { * @length: Length of the region in bytes * @prot: IOMMU Protection flags (READ/WRITE/...) * @type: Type of the reserved region + * @fw_data: Firmware-specific data */ struct iommu_resv_region { struct list_head list; @@ -141,6 +147,9 @@ struct iommu_resv_region { size_t length; int prot; enum iommu_resv_type type; + union { + struct iommu_iort_rmr_data rmr; + } fw_data; }; /**