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qemu: support appending a vIOMMU device

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Add a new function appendIOMMU() to the qemuArch interface
and provide an implementation on amd64 architecture.

Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
This commit is contained in:
Adrian Moreno
2020-03-04 15:35:37 +01:00
committed by Fabiano Fidêncio
parent 03735fb9ee
commit 7faaa06a52
5 changed files with 59 additions and 0 deletions
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21
src/runtime/virtcontainers/qemu_arch_base.go
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@@ -130,6 +130,9 @@ type qemuArch interface {
// appendPCIeRootPortDevice appends a pcie-root-port device to pcie.0 bus
appendPCIeRootPortDevice(devices []govmmQemu.Device, number uint32) []govmmQemu.Device
// append vIOMMU device
appendIOMMU(devices []govmmQemu.Device) ([]govmmQemu.Device, error)
}
type qemuArchBase struct {
@@ -765,4 +768,22 @@ func (q *qemuArchBase) addBridge(b types.Bridge) {
// appendPCIeRootPortDevice appends to devices the given pcie-root-port
func (q *qemuArchBase) appendPCIeRootPortDevice(devices []govmmQemu.Device, number uint32) []govmmQemu.Device {
return genericAppendPCIeRootPort(devices, number, q.machineType)
}
// appendIOMMU appends a virtual IOMMU device
func (q *qemuArchBase) appendIOMMU(devices []govmmQemu.Device) ([]govmmQemu.Device, error) {
switch q.machineType {
case QemuQ35:
iommu := govmmQemu.IommuDev{
Intremap: true,
DeviceIotlb: true,
CachingMode: true,
}
devices = append(devices, iommu)
return devices, nil
default:
return devices, fmt.Errorf("Machine Type %s does not support vIOMMU", q.machineType)
}
}