From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE5C5C3A59F for ; Thu, 29 Aug 2019 11:18:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 93BFC20674 for ; Thu, 29 Aug 2019 11:18:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="QK7F3ESU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727233AbfH2LR7 (ORCPT ); Thu, 29 Aug 2019 07:17:59 -0400 Received: from mail-ed1-f67.google.com ([209.85.208.67]:45724 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725782AbfH2LR6 (ORCPT ); Thu, 29 Aug 2019 07:17:58 -0400 Received: by mail-ed1-f67.google.com with SMTP id x19so3589630eda.12 for ; Thu, 29 Aug 2019 04:17:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=fWFDdsSRIYNKrRBdDSN7KSj6FUeTwnbHluq8rixbTiU=; b=QK7F3ESU41SJHkKfAxVhUhnoObCMRcjDeVy8XBXAejYxpeOt+AeNnLB5DhxnGzPZTP 2SVCtoiYV0imTE3QaoiCdK93Uwz0ghTmT7C4bje7vpBjSbEj461Af+y8MbSZYrnR6OJc 90jH6lwG2R68n8P70gZi9ZMrBnrrvn3X/lr7gT8ZcpnVRJWvoUB3IsrVky/rmi5AEBSW uWKkPfVSMlrHQs78MPEAgySdqXX9uf6SRW4UXQWzrh58WYWx7THUHN3dpksbqXawdh+D SVcbZtPGdWRnNhIS7772iNUia2YtTK4d3vb0INvBEj7VNgQecAAkl7abEQ0zMCnH3ec2 RGpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=fWFDdsSRIYNKrRBdDSN7KSj6FUeTwnbHluq8rixbTiU=; b=LZ7KK78cwJPMvntQ8a4ZJwhq+iMDoSNfvnEqY9j3GjaEYh9VYr16qJpK0lYAcJ0VFO sB5+HyggJZ22lW8yTHy/GgO+4r6APGnKNvsjIwBIHw6hvi5DXZHTPwW1UQHm1siYAGHZ HhwoyfqC7HSjJgooOeJa8yY3ryCjTnU9qEOEqpk24qfEFuDx3Mx2KlqIEYG9YOPCchpt FQp6+4CoSmRNIupg3sVHxOlvzK7U0bxKoX2drWs4bpIzoQ8fpnsXWPIQZ7Jw816E4efs up/x3R71O1+O7BhRLFzZIhy0FKqtf8NG1kqUK3TOkmYNlypzb6urkCfZa4laOWJBSok5 3mtw== X-Gm-Message-State: APjAAAUN8pN7+3dYu7RP1uzE/Z6qywnpitdU0z8nevJHJ3jvPTX420wD dTc+0A0r2laJaXWJAwuKQ0c= X-Google-Smtp-Source: APXvYqwUQQWr7opeC82ffN614dN4qfpRwQm9wEqpQ2QRcIIdZGIO8kDGPJZeUP/x70eq+7DhXC+pxw== X-Received: by 2002:a50:c19a:: with SMTP id m26mr9023066edf.184.1567077476308; Thu, 29 Aug 2019 04:17:56 -0700 (PDT) Received: from localhost (pD9E51890.dip0.t-ipconnect.de. [217.229.24.144]) by smtp.gmail.com with ESMTPSA id a16sm341890ejr.10.2019.08.29.04.17.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Aug 2019 04:17:54 -0700 (PDT) From: Thierry Reding To: Joerg Roedel Cc: Will Deacon , Robin Murphy , David Woodhouse , Jean-Philippe Brucker , iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/5] iommu: Implement iommu_put_resv_regions_simple() Date: Thu, 29 Aug 2019 13:17:48 +0200 Message-Id: <20190829111752.17513-2-thierry.reding@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190829111752.17513-1-thierry.reding@gmail.com> References: <20190829111752.17513-1-thierry.reding@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thierry Reding Implement a generic function for removing reserved regions. This can be used by drivers that don't do anything fancy with these regions other than allocating memory for them. Signed-off-by: Thierry Reding --- drivers/iommu/iommu.c | 19 +++++++++++++++++++ include/linux/iommu.h | 2 ++ 2 files changed, 21 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 0f585b614657..73a2a6b13507 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2170,6 +2170,25 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list) ops->put_resv_regions(dev, list); } +/** + * iommu_put_resv_regions_simple - Reserved region driver helper + * @dev: device for which to free reserved regions + * @list: reserved region list for device + * + * IOMMU drivers can use this to implement their .put_resv_regions() callback + * for simple reservations. Memory allocated for each reserved region will be + * freed. If an IOMMU driver allocates additional resources per region, it is + * going to have to implement a custom callback. + */ +void iommu_put_resv_regions_simple(struct device *dev, struct list_head *list) +{ + struct iommu_resv_region *entry, *next; + + list_for_each_entry_safe(entry, next, list, list) + kfree(entry); +} +EXPORT_SYMBOL(iommu_put_resv_regions_simple); + struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, enum iommu_resv_type type) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 29bac5345563..d9c91e37ac2e 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -434,6 +434,8 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); +extern void iommu_put_resv_regions_simple(struct device *dev, + struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); extern int iommu_request_dma_domain_for_dev(struct device *dev); extern void iommu_set_default_passthrough(bool cmd_line); -- 2.22.0