One flag is added to specify whether to enable INTR for emulated
IOMMU. By default, interrupt remapping is not supportted. To enable it,
we should specify something like:
$ qemu-system-x86_64 -M q35,iommu=on,intr=on
To be more clear, the following command:
$ qemu-system-x86_64 -M q35,iommu=on
Will enable IOMMU only, without interrupt remapping support.
Currently, Intel IOMMU IR only support kernel-irqchip={off|split}. We
need to specify either of it in -M as well.
Signed-off-by: Peter Xu <pet...@redhat.com>
---
hw/core/machine.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 276ad61..b00f39f 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -300,6 +300,20 @@ static void machine_set_iommu(Object *obj, bool value,
Error **errp)
ms->iommu = value;
}
+static bool machine_get_intr(Object *obj, Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+
+ return ms->iommu_intr;
+}
+
+static void machine_set_intr(Object *obj, bool value, Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+
+ ms->iommu_intr = value;
+}
+
static void machine_set_suppress_vmdesc(Object *obj, bool value, Error **errp)
{
MachineState *ms = MACHINE(obj);
@@ -480,6 +494,12 @@ static void machine_initfn(Object *obj)
object_property_set_description(obj, "iommu",
"Set on/off to enable/disable Intel IOMMU
(VT-d)",
NULL);
+ object_property_add_bool(obj, "intr", machine_get_intr,
+ machine_set_intr, NULL);
+ object_property_set_description(obj, "intr",
+ "Set on/off to enable/disable IOMMU"
+ " interrupt remapping",
+ NULL);
object_property_add_bool(obj, "suppress-vmdesc",
machine_get_suppress_vmdesc,
machine_set_suppress_vmdesc, NULL);
--
2.4.3
