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From 5ce65934798e5c87e465f30ad08f24b76429ee7c Mon Sep 17 00:00:00 2001
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From: Peter Xu <peterx@redhat.com>
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Date: Tue, 6 Feb 2018 08:21:19 +0100
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Subject: [PATCH 20/20] virtio-gpu: disallow vIOMMU
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Peter Xu <peterx@redhat.com>
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Message-id: <20180206082119.9246-1-peterx@redhat.com>
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Patchwork-id: 78903
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O-Subject: [RHEL-7.5 qemu-kvm-rhev PATCH] virtio-gpu: disallow vIOMMU
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Bugzilla: 1540182
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RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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RH-Acked-by: Marc-André Lureau <mlureau@redhat.com>
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virtio-gpu has special code path that bypassed vIOMMU protection. So
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for now let's disable iommu_platform for the device until we fully
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support that (if needed).
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After the patch, both virtio-vga and virtio-gpu won't allow to boot with
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iommu_platform parameter set.
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CC: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Peter Xu <peterx@redhat.com>
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Message-id: 20180131040401.3550-1-peterx@redhat.com
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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(cherry picked from commit 34e304e97576a9e17680c868c00ff524a981007b)
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Signed-off-by: Peter Xu <peterx@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/display/virtio-gpu-pci.c | 8 +++++++-
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hw/display/virtio-gpu.c | 5 +++++
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2 files changed, 12 insertions(+), 1 deletion(-)
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diff --git a/hw/display/virtio-gpu-pci.c b/hw/display/virtio-gpu-pci.c
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index ef92c4a..3519dc8 100644
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--- a/hw/display/virtio-gpu-pci.c
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+++ b/hw/display/virtio-gpu-pci.c
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@@ -28,10 +28,16 @@ static void virtio_gpu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
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VirtIOGPU *g = &vgpu->vdev;
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DeviceState *vdev = DEVICE(&vgpu->vdev);
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int i;
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+ Error *local_error = NULL;
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qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
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virtio_pci_force_virtio_1(vpci_dev);
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- object_property_set_bool(OBJECT(vdev), true, "realized", errp);
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+ object_property_set_bool(OBJECT(vdev), true, "realized", &local_error);
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+
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+ if (local_error) {
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+ error_propagate(errp, local_error);
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+ return;
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+ }
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for (i = 0; i < g->conf.max_outputs; i++) {
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object_property_set_link(OBJECT(g->scanout[i].con),
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diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
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index 4e66535..db53e0b 100644
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--- a/hw/display/virtio-gpu.c
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+++ b/hw/display/virtio-gpu.c
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@@ -1109,6 +1109,11 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
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Error *local_err = NULL;
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int i;
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+ if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
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+ error_setg(errp, "virtio-gpu does not support vIOMMU yet");
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+ return;
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+ }
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+
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if (g->conf.max_outputs > VIRTIO_GPU_MAX_SCANOUTS) {
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error_setg(errp, "invalid max_outputs > %d", VIRTIO_GPU_MAX_SCANOUTS);
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return;
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--
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1.8.3.1
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