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: 12800154 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 D0E5CC433EF for ; Mon, 4 Apr 2022 12:44:23 +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=8lUxrdvwAypzDGE9J/guP4S5hu1QO1dzHxouiDISz4Y=; b=TFjuPeA8/5hYt/ iki3c3v8cQu8Thjrif3GOy2nAjV0Mu13x7w5bJezlapGJFJwD6jW+lP9xkKNvd65sxEd/CH5X2w1V TD53ElMffu/XL+Lp5obUHmipHillZAqJtMmnDzkB9csiXi0bGdlokj1Q3Z75EABtdPukVr9giGXxN oVEuVPWI6nJ0fCPiHWYeD4etLg+NPeZ0lRZI1Gk6ONDrAsOIkq287aWxziv5ohZLlXEcS2m7rosrL kGEDFlKHyDI5+pWzNmwTAaJs+Rgg64AlXZ+96VkN7n+y/F9ntGgyq2+wlRo0IDhJHRa3crxI05V7+ UIUCcDKyAo6zRV0Fwd3A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbM3I-00EvY3-UX; Mon, 04 Apr 2022 12:43:25 +0000 Received: from frasgout.his.huawei.com ([185.176.79.56]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbM38-00EvU5-Gw for linux-arm-kernel@lists.infradead.org; Mon, 04 Apr 2022 12:43:15 +0000 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220404_054314_763330_0DCF0F35 X-CRM114-Status: UNSURE ( 9.87 ) X-CRM114-Notice: Please train this message. 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 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; }; /**