From patchwork Thu Nov 22 17:15:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 1001904 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4315rh4T8gz9rxp for ; Fri, 23 Nov 2018 04:23:48 +1100 (AEDT) Received: from localhost ([::1]:48156 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gPshd-0002im-O5 for incoming@patchwork.ozlabs.org; Thu, 22 Nov 2018 12:23:45 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49368) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gPsb0-0005Lw-N6 for qemu-devel@nongnu.org; Thu, 22 Nov 2018 12:16:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gPsat-0006HJ-9n for qemu-devel@nongnu.org; Thu, 22 Nov 2018 12:16:54 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39126) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gPsaY-0005u3-SK; Thu, 22 Nov 2018 12:16:28 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B651030014CF; Thu, 22 Nov 2018 17:16:23 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-235.ams2.redhat.com [10.36.116.235]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6F5A660610; Thu, 22 Nov 2018 17:16:21 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, mst@redhat.com, jean-philippe.brucker@arm.com Date: Thu, 22 Nov 2018 18:15:29 +0100 Message-Id: <20181122171538.12359-9-eric.auger@redhat.com> In-Reply-To: <20181122171538.12359-1-eric.auger@redhat.com> References: <20181122171538.12359-1-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.40]); Thu, 22 Nov 2018 17:16:23 +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 v9 08/17] 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: tn@semihalf.com, kevin.tian@intel.com, bharat.bhushan@nxp.com, peterx@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This patch implements virtio_iommu_map/unmap. Signed-off-by: Eric Auger --- v5 -> v6: - use new v0.6 fields - replace error_report by qemu_log_mask v3 -> v4: - implement unmap semantics as specified in v0.4 --- hw/virtio/trace-events | 3 ++ hw/virtio/virtio-iommu.c | 94 +++++++++++++++++++++++++++++++++++++++- 2 files changed, 95 insertions(+), 2 deletions(-) diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events index 4b15086872..b3c5c2604e 100644 --- a/hw/virtio/trace-events +++ b/hw/virtio/trace-events @@ -65,3 +65,6 @@ virtio_iommu_get_endpoint(uint32_t ep_id) "Alloc endpoint=%d" virtio_iommu_put_endpoint(uint32_t ep_id) "Free endpoint=%d" virtio_iommu_get_domain(uint32_t domain_id) "Alloc domain=%d" virtio_iommu_put_domain(uint32_t domain_id) "Free domain=%d" +virtio_iommu_unmap_left_interval(uint64_t low, uint64_t high, uint64_t next_low, uint64_t next_high) "Unmap left [0x%"PRIx64",0x%"PRIx64"], new interval=[0x%"PRIx64",0x%"PRIx64"]" +virtio_iommu_unmap_right_interval(uint64_t low, uint64_t high, uint64_t next_low, uint64_t next_high) "Unmap right [0x%"PRIx64",0x%"PRIx64"], new interval=[0x%"PRIx64",0x%"PRIx64"]" +virtio_iommu_unmap_inc_interval(uint64_t low, uint64_t high) "Unmap inc [0x%"PRIx64",0x%"PRIx64"]" diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 5c231f865c..23f7dc6f7f 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -18,6 +18,7 @@ */ #include "qemu/osdep.h" +#include "qemu/log.h" #include "qemu/iov.h" #include "qemu-common.h" #include "hw/virtio/virtio.h" @@ -57,6 +58,13 @@ typedef struct viommu_interval { uint64_t high; } viommu_interval; +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); @@ -244,10 +252,37 @@ static int virtio_iommu_map(VirtIOIOMMU *s, uint64_t virt_start = le64_to_cpu(req->virt_start); uint64_t virt_end = le64_to_cpu(req->virt_end); uint32_t flags = le32_to_cpu(req->flags); + viommu_domain *domain; + viommu_interval *interval; + viommu_mapping *mapping; + + interval = g_malloc0(sizeof(*interval)); + + interval->low = virt_start; + interval->high = virt_end; + + domain = g_tree_lookup(s->domains, GUINT_TO_POINTER(domain_id)); + if (!domain) { + return VIRTIO_IOMMU_S_NOENT; + } + + mapping = g_tree_lookup(domain->mappings, (gpointer)interval); + if (mapping) { + g_free(interval); + return VIRTIO_IOMMU_S_INVAL; + } trace_virtio_iommu_map(domain_id, virt_start, virt_end, phys_start, flags); - return VIRTIO_IOMMU_S_UNSUPP; + mapping = g_malloc0(sizeof(*mapping)); + mapping->virt_addr = virt_start; + mapping->phys_addr = phys_start; + mapping->size = virt_end - virt_start + 1; + mapping->flags = flags; + + g_tree_insert(domain->mappings, interval, mapping); + + return VIRTIO_IOMMU_S_OK; } static int virtio_iommu_unmap(VirtIOIOMMU *s, @@ -256,10 +291,65 @@ static int virtio_iommu_unmap(VirtIOIOMMU *s, uint32_t domain_id = le32_to_cpu(req->domain); uint64_t virt_start = le64_to_cpu(req->virt_start); uint64_t virt_end = le64_to_cpu(req->virt_end); + uint64_t size = virt_end - virt_start + 1; + viommu_mapping *mapping; + viommu_interval interval; + viommu_domain *domain; trace_virtio_iommu_unmap(domain_id, virt_start, virt_end); - return VIRTIO_IOMMU_S_UNSUPP; + domain = g_tree_lookup(s->domains, GUINT_TO_POINTER(domain_id)); + if (!domain) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: no domain\n", __func__); + return VIRTIO_IOMMU_S_NOENT; + } + interval.low = virt_start; + interval.high = virt_end; + + mapping = g_tree_lookup(domain->mappings, (gpointer)(&interval)); + + while (mapping) { + viommu_interval current; + uint64_t low = mapping->virt_addr; + uint64_t high = mapping->virt_addr + mapping->size - 1; + + current.low = low; + current.high = high; + + if (low == interval.low && size >= mapping->size) { + g_tree_remove(domain->mappings, (gpointer)(¤t)); + interval.low = high + 1; + trace_virtio_iommu_unmap_left_interval(current.low, current.high, + interval.low, interval.high); + } else if (high == interval.high && size >= mapping->size) { + trace_virtio_iommu_unmap_right_interval(current.low, current.high, + interval.low, interval.high); + g_tree_remove(domain->mappings, (gpointer)(¤t)); + interval.high = low - 1; + } else if (low > interval.low && high < interval.high) { + trace_virtio_iommu_unmap_inc_interval(current.low, current.high); + g_tree_remove(domain->mappings, (gpointer)(¤t)); + } else { + break; + } + if (interval.low >= interval.high) { + return VIRTIO_IOMMU_S_OK; + } else { + mapping = g_tree_lookup(domain->mappings, (gpointer)(&interval)); + } + } + + if (mapping) { + qemu_log_mask(LOG_GUEST_ERROR, + "****** %s: Unmap 0x%"PRIx64" size=0x%"PRIx64 + " from 0x%"PRIx64" size=0x%"PRIx64" is not supported\n", + __func__, interval.low, size, + mapping->virt_addr, mapping->size); + } else { + return VIRTIO_IOMMU_S_OK; + } + + return VIRTIO_IOMMU_S_INVAL; } #define get_payload_size(req) (\