From nobody Mon Feb 9 03:13:05 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1516374761780571.6603922779293; Fri, 19 Jan 2018 07:12:41 -0800 (PST) Received: from localhost ([::1]:54442 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ecYLR-0006qX-3Q for importer@patchew.org; Fri, 19 Jan 2018 10:12:41 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48556) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ecYBr-0006VA-9c for qemu-devel@nongnu.org; Fri, 19 Jan 2018 10:02:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ecYBq-00076q-9N for qemu-devel@nongnu.org; Fri, 19 Jan 2018 10:02:47 -0500 Received: from mx1.redhat.com ([209.132.183.28]:55928) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ecYBl-00073F-IM; Fri, 19 Jan 2018 10:02:41 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 91705C05678E; Fri, 19 Jan 2018 15:02:40 +0000 (UTC) Received: from AMD.redhat.com (ovpn-116-129.ams2.redhat.com [10.36.116.129]) by smtp.corp.redhat.com (Postfix) with ESMTP id 252455C1B7; Fri, 19 Jan 2018 15:02:08 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, peter.maydell@linaro.org, alex.williamson@redhat.com, mst@redhat.com, qemu-arm@nongnu.org, qemu-devel@nongnu.org, jean-philippe.brucker@arm.com Date: Fri, 19 Jan 2018 14:49:04 +0000 Message-Id: <1516373355-305-12-git-send-email-eric.auger@redhat.com> In-Reply-To: <1516373355-305-1-git-send-email-eric.auger@redhat.com> References: <1516373355-305-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 19 Jan 2018 15:02:40 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC v5 11/22] virtio-iommu: Implement map/unmap X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wei@redhat.com, kevin.tian@intel.com, marc.zyngier@arm.com, tn@semihalf.com, will.deacon@arm.com, drjones@redhat.com, peterx@redhat.com, linuc.decode@gmail.com, bharat.bhushan@nxp.com, christoffer.dall@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This patch implements virtio_iommu_map/unmap. Signed-off-by: Eric Auger --- v3 -> v4: - implement unmap semantics as specified in v0.4 --- hw/virtio/trace-events | 3 ++ hw/virtio/virtio-iommu.c | 91 ++++++++++++++++++++++++++++++++++++++++++++= ++-- 2 files changed, 92 insertions(+), 2 deletions(-) diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events index 59c75da..3ce9b82 100644 --- a/hw/virtio/trace-events +++ b/hw/virtio/trace-events @@ -42,3 +42,6 @@ virtio_iommu_get_endpoint(uint32_t ep_id) "Alloc endpoint= =3D%d" virtio_iommu_put_endpoint(uint32_t ep_id) "Free endpoint=3D%d" virtio_iommu_get_domain(uint32_t domain_id) "Alloc domain=3D%d" virtio_iommu_put_domain(uint32_t domain_id) "Free domain=3D%d" +virtio_iommu_unmap_left_interval(uint64_t low, uint64_t high, uint64_t nex= t_low, uint64_t next_high) "Unmap left [0x%"PRIx64",0x%"PRIx64"], new inter= val=3D[0x%"PRIx64",0x%"PRIx64"]" +virtio_iommu_unmap_right_interval(uint64_t low, uint64_t high, uint64_t ne= xt_low, uint64_t next_high) "Unmap right [0x%"PRIx64",0x%"PRIx64"], new int= erval=3D[0x%"PRIx64",0x%"PRIx64"]" +virtio_iommu_unmap_inc_interval(uint64_t low, uint64_t high) "Unmap inc [0= x%"PRIx64",0x%"PRIx64"]" diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index b30d761..f530eca 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -58,6 +58,13 @@ typedef struct viommu_interval { uint64_t high; } viommu_interval; =20 +typedef struct viommu_mapping { + uint64_t virt_addr; + uint64_t phys_addr; + uint64_t size; + uint32_t flags; +} viommu_mapping; + static inline uint16_t virtio_iommu_get_sid(IOMMUDevice *dev) { return PCI_BUILD_BDF(pci_bus_num(dev->bus), dev->devfn); @@ -253,10 +260,37 @@ static int virtio_iommu_map(VirtIOIOMMU *s, uint64_t virt_addr =3D le64_to_cpu(req->virt_addr); uint64_t size =3D le64_to_cpu(req->size); uint32_t flags =3D le32_to_cpu(req->flags); + viommu_domain *domain; + viommu_interval *interval; + viommu_mapping *mapping; + + interval =3D g_malloc0(sizeof(*interval)); + + interval->low =3D virt_addr; + interval->high =3D virt_addr + size - 1; + + domain =3D g_tree_lookup(s->domains, GUINT_TO_POINTER(domain_id)); + if (!domain) { + return VIRTIO_IOMMU_S_NOENT; + } + + mapping =3D g_tree_lookup(domain->mappings, (gpointer)interval); + if (mapping) { + g_free(interval); + return VIRTIO_IOMMU_S_INVAL; + } =20 trace_virtio_iommu_map(domain_id, phys_addr, virt_addr, size, flags); =20 - return VIRTIO_IOMMU_S_UNSUPP; + mapping =3D g_malloc0(sizeof(*mapping)); + mapping->virt_addr =3D virt_addr; + mapping->phys_addr =3D phys_addr; + mapping->size =3D size; + mapping->flags =3D flags; + + g_tree_insert(domain->mappings, interval, mapping); + + return VIRTIO_IOMMU_S_OK; } =20 static int virtio_iommu_unmap(VirtIOIOMMU *s, @@ -265,10 +299,63 @@ static int virtio_iommu_unmap(VirtIOIOMMU *s, uint32_t domain_id =3D le32_to_cpu(req->domain); uint64_t virt_addr =3D le64_to_cpu(req->virt_addr); uint64_t size =3D le64_to_cpu(req->size); + viommu_mapping *mapping; + viommu_interval interval; + viommu_domain *domain; =20 trace_virtio_iommu_unmap(domain_id, virt_addr, size); =20 - return VIRTIO_IOMMU_S_UNSUPP; + domain =3D g_tree_lookup(s->domains, GUINT_TO_POINTER(domain_id)); + if (!domain) { + error_report("%s: no domain", __func__); + return VIRTIO_IOMMU_S_NOENT; + } + interval.low =3D virt_addr; + interval.high =3D virt_addr + size - 1; + + mapping =3D g_tree_lookup(domain->mappings, (gpointer)(&interval)); + + while (mapping) { + viommu_interval current; + uint64_t low =3D mapping->virt_addr; + uint64_t high =3D mapping->virt_addr + mapping->size - 1; + + current.low =3D low; + current.high =3D high; + + if (low =3D=3D interval.low && size >=3D mapping->size) { + g_tree_remove(domain->mappings, (gpointer)(¤t)); + interval.low =3D high + 1; + trace_virtio_iommu_unmap_left_interval(current.low, current.hi= gh, + interval.low, interval.high); + } else if (high =3D=3D interval.high && size >=3D mapping->size) { + trace_virtio_iommu_unmap_right_interval(current.low, current.h= igh, + interval.low, interval.high); + g_tree_remove(domain->mappings, (gpointer)(¤t)); + interval.high =3D low - 1; + } else if (low > interval.low && high < interval.high) { + trace_virtio_iommu_unmap_inc_interval(current.low, current.hig= h); + g_tree_remove(domain->mappings, (gpointer)(¤t)); + } else { + break; + } + if (interval.low >=3D interval.high) { + return VIRTIO_IOMMU_S_OK; + } else { + mapping =3D g_tree_lookup(domain->mappings, (gpointer)(&interv= al)); + } + } + + if (mapping) { + error_report("****** %s: Unmap 0x%"PRIx64" size=3D0x%"PRIx64 + " from 0x%"PRIx64" size=3D0x%"PRIx64" is not supporte= d", + __func__, interval.low, size, + mapping->virt_addr, mapping->size); + } else { + return VIRTIO_IOMMU_S_OK; + } + + return VIRTIO_IOMMU_S_INVAL; } =20 #define get_payload_size(req) (\ --=20 1.9.1