From patchwork Fri Feb 26 17:35:50 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 8440231 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 33A17C0553 for ; Fri, 26 Feb 2016 17:38:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 62BF420395 for ; Fri, 26 Feb 2016 17:38:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 73FCF203B4 for ; Fri, 26 Feb 2016 17:38:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422968AbcBZRiO (ORCPT ); Fri, 26 Feb 2016 12:38:14 -0500 Received: from mail-wm0-f48.google.com ([74.125.82.48]:37290 "EHLO mail-wm0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422825AbcBZRgd (ORCPT ); Fri, 26 Feb 2016 12:36:33 -0500 Received: by mail-wm0-f48.google.com with SMTP id g62so79670002wme.0 for ; Fri, 26 Feb 2016 09:36:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=c2tmlTZFO34YuIfXdIOC8nYhWzb6H5b7vXh+03gLUc4=; b=ZQ/IvQsZpQK2dSbu8xlQom2KuKmczcVGjhfKN2j2ivJWNDAw8lIdhFC3q+jFMGaeVQ OUeKa2w37c7mCY9ljBRBKwc69k926LvSTFgnCxdZoosOwHKmYfc4aQ8W2NlXE+Kdxip9 rxr8W2RYI6NPlWRNaJFzcSGZ3Awvnb/wUwoxw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=c2tmlTZFO34YuIfXdIOC8nYhWzb6H5b7vXh+03gLUc4=; b=aZ0s/DmnFvwW2jEo5VfZq0DpaWZ73iZVzldrybV2pI3+BbmdptCug6aWByfpZFgnDe /69+JjXgDIPqQJjxq5rkUyIsgxn3jnRfY6GvvIiaaqrAqDk85tco8yuIwXwNAoGXeCzd LBLJ5NCUigZlw+RSLAkVCgXNLn5qDXMXJsjwbM6fvvKlTCSX4Qy6T5mdZ+pd5bNdZuEh NyrtSstPR31p9YZv0V2ttYMGclveBTuzNBZmnN1mw3EOQ+98zfZ+q3wglIwTBzPIVkkR p6O52Oyv7voJ8zIITmE5AwlKZi+pu6w5HNQq9+FOaLBqDNwHZuSSMqNajzmOgGPok2k0 A0yQ== X-Gm-Message-State: AD7BkJJ2rOuKkZnFoEHl0oCk4kLufgLwGnTwdDcb09eqeXJs4YR4FXyhsO6BcB2hymkM27Id X-Received: by 10.28.49.3 with SMTP id x3mr4266434wmx.4.1456508192636; Fri, 26 Feb 2016 09:36:32 -0800 (PST) Received: from new-host-8.home (LMontsouris-657-1-37-90.w80-11.abo.wanadoo.fr. [80.11.198.90]) by smtp.gmail.com with ESMTPSA id 77sm3750373wmp.18.2016.02.26.09.36.30 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 26 Feb 2016 09:36:30 -0800 (PST) From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, christoffer.dall@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: suravee.suthikulpanit@amd.com, patches@linaro.org, linux-kernel@vger.kernel.org, Manish.Jaggi@caviumnetworks.com, Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, iommu@lists.linux-foundation.org Subject: [RFC v4 10/14] vfio: introduce VFIO_IOVA_RESERVED vfio_dma type Date: Fri, 26 Feb 2016 17:35:50 +0000 Message-Id: <1456508154-2253-11-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1456508154-2253-1-git-send-email-eric.auger@linaro.org> References: <1456508154-2253-1-git-send-email-eric.auger@linaro.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We introduce a vfio_dma type since we will need to discriminate legacy vfio_dma's from new reserved ones. Since those latter are not mapped at registration, some treatments need to be reworked: removal, replay. Currently they are unplugged. In subsequent patches they will be reworked. Signed-off-by: Eric Auger --- drivers/vfio/vfio_iommu_type1.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 6f1ea3d..692e9a2 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -53,6 +53,15 @@ module_param_named(disable_hugepages, MODULE_PARM_DESC(disable_hugepages, "Disable VFIO IOMMU support for IOMMU hugepages."); +enum vfio_iova_type { + VFIO_IOVA_USER = 0, /* standard IOVA used to map user vaddr */ + /* + * IOVA reserved to map special host physical addresses, + * MSI frames for instance + */ + VFIO_IOVA_RESERVED, +}; + struct vfio_iommu { struct list_head domain_list; struct mutex lock; @@ -75,6 +84,7 @@ struct vfio_dma { unsigned long vaddr; /* Process virtual addr */ size_t size; /* Map size (bytes) */ int prot; /* IOMMU_READ/WRITE */ + enum vfio_iova_type type; /* type of IOVA */ }; struct vfio_group { @@ -395,7 +405,8 @@ static void vfio_unmap_unpin(struct vfio_iommu *iommu, struct vfio_dma *dma) static void vfio_remove_dma(struct vfio_iommu *iommu, struct vfio_dma *dma) { - vfio_unmap_unpin(iommu, dma); + if (likely(dma->type != VFIO_IOVA_RESERVED)) + vfio_unmap_unpin(iommu, dma); vfio_unlink_dma(iommu, dma); kfree(dma); } @@ -671,6 +682,10 @@ static int vfio_iommu_replay(struct vfio_iommu *iommu, dma_addr_t iova; dma = rb_entry(n, struct vfio_dma, node); + + if (unlikely(dma->type == VFIO_IOVA_RESERVED)) + continue; + iova = dma->iova; while (iova < dma->iova + dma->size) {