[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH 6/6] pc: Allow instantiating a virtio-iommu device
From: |
Jean-Philippe Brucker |
Subject: |
[PATCH 6/6] pc: Allow instantiating a virtio-iommu device |
Date: |
Tue, 10 Aug 2021 10:45:06 +0200 |
From: Eric Auger <eric.auger@redhat.com>
Add a hotplug handler for virtio-iommu on x86 and set the necessary
reserved region property. On x86, the [0xfee00000, 0xfeefffff] DMA
region is reserved for MSIs. DMA transactions to this range either
trigger IRQ remapping in the IOMMU or bypasses IOMMU translation.
Although virtio-iommu does not support IRQ remapping it must be informed
of the reserved region so that it can forward DMA transactions targeting
this region.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
hw/i386/pc.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 694fc9ce07..fb24f000e7 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1376,6 +1376,14 @@ static void pc_machine_device_pre_plug_cb(HotplugHandler
*hotplug_dev,
} else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_PMEM_PCI) ||
object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI)) {
pc_virtio_md_pci_pre_plug(hotplug_dev, dev, errp);
+ } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) {
+ /* Declare the reserved MSI region */
+ char *resv_prop_str = g_strdup_printf("0xfee00000:0xfeefffff:%d",
+ VIRTIO_IOMMU_RESV_MEM_T_MSI);
+
+ qdev_prop_set_uint32(dev, "len-reserved-regions", 1);
+ qdev_prop_set_string(dev, "reserved-regions[0]", resv_prop_str);
+ g_free(resv_prop_str);
}
}
@@ -1436,7 +1444,8 @@ static HotplugHandler
*pc_get_hotplug_handler(MachineState *machine,
if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) ||
object_dynamic_cast(OBJECT(dev), TYPE_CPU) ||
object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_PMEM_PCI) ||
- object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI)) {
+ object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI) ||
+ object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) {
return HOTPLUG_HANDLER(machine);
}
--
2.32.0
- [PATCH 0/6] virtio-iommu: Add ACPI support, Jean-Philippe Brucker, 2021/08/10
- [PATCH 1/6] acpi: Add VIOT structure definitions, Jean-Philippe Brucker, 2021/08/10
- [PATCH 3/6] hw/arm/virt-acpi-build: Add VIOT table for virtio-iommu, Jean-Philippe Brucker, 2021/08/10
- [PATCH 4/6] hw/arm/virt: Remove device tree restriction for virtio-iommu, Jean-Philippe Brucker, 2021/08/10
- [PATCH 2/6] hw/acpi: Add VIOT table, Jean-Philippe Brucker, 2021/08/10
- [PATCH 5/6] pc: Add VIOT table for virtio-iommu, Jean-Philippe Brucker, 2021/08/10
- [PATCH 6/6] pc: Allow instantiating a virtio-iommu device,
Jean-Philippe Brucker <=
- Re: [PATCH 0/6] virtio-iommu: Add ACPI support, Eric Auger, 2021/08/17