From patchwork Tue Nov 15 13:09:17 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 9429673 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 31F0E60755 for ; Tue, 15 Nov 2016 13:10:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D9BE287C3 for ; Tue, 15 Nov 2016 13:10:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1260828859; Tue, 15 Nov 2016 13:10:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5D0BD287CB for ; Tue, 15 Nov 2016 13:10:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754359AbcKONJu (ORCPT ); Tue, 15 Nov 2016 08:09:50 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46798 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753003AbcKONJq (ORCPT ); Tue, 15 Nov 2016 08:09:46 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2373034AA; Tue, 15 Nov 2016 13:09:46 +0000 (UTC) Received: from localhost.redhat.com (vpn1-6-12.ams2.redhat.com [10.36.6.12]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uAFD9Pre022488; Tue, 15 Nov 2016 08:09:42 -0500 From: Eric Auger To: eric.auger@redhat.com, eric.auger.pro@gmail.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org Cc: kvm@vger.kernel.org, drjones@redhat.com, linux-kernel@vger.kernel.org, pranav.sawargaonkar@gmail.com, iommu@lists.linux-foundation.org, punit.agrawal@arm.com, diana.craciun@nxp.com Subject: [RFC v3 04/10] iommu: iommu_alloc_resv_region Date: Tue, 15 Nov 2016 13:09:17 +0000 Message-Id: <1479215363-2898-5-git-send-email-eric.auger@redhat.com> In-Reply-To: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> References: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 15 Nov 2016 13:09:46 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce a new helper serving the purpose to allocate a reserved region. This will be used in iommu driver implementing reserved region callbacks. Signed-off-by: Eric Auger --- drivers/iommu/iommu.c | 16 ++++++++++++++++ include/linux/iommu.h | 8 ++++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index c7ed334..6ee529f 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1562,6 +1562,22 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list) ops->put_resv_regions(dev, list); } +struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start, + size_t length, + unsigned int prot) +{ + struct iommu_resv_region *region; + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) + return NULL; + + region->start = start; + region->length = length; + region->prot = prot; + return region; +} + /* Request that a device is direct mapped by the IOMMU */ int iommu_request_dm_for_dev(struct device *dev) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 02cf565..0aea877 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -241,6 +241,8 @@ 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 int iommu_request_dm_for_dev(struct device *dev); +extern struct iommu_resv_region * +iommu_alloc_resv_region(phys_addr_t start, size_t length, unsigned int prot); extern int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group); @@ -454,6 +456,12 @@ static inline void iommu_put_resv_regions(struct device *dev, { } +static inline struct iommu_resv_region * +iommu_alloc_resv_region(phys_addr_t start, size_t length, unsigned int prot) +{ + return NULL; +} + static inline int iommu_request_dm_for_dev(struct device *dev) { return -ENODEV;