Implement get_viommu_cap() callback and expose stage-1 capability for now.
VFIO uses it to create nested parent domain which is further used to create
nested domain in vIOMMU. All these will be implemented in following patches.
Suggested-by: Yi Liu <yi.l....@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com>
Reviewed-by: Eric Auger <eric.au...@redhat.com>
---
hw/i386/intel_iommu.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index c97953d7a1..178c15e31c 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -24,6 +24,7 @@
#include "qemu/main-loop.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
+#include "hw/iommu.h"
#include "intel_iommu_internal.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_bus.h"
@@ -4420,6 +4421,16 @@ static void vtd_dev_unset_iommu_device(PCIBus *bus, void
*opaque, int devfn)
vtd_iommu_unlock(s);
}
+static uint64_t vtd_get_viommu_cap(void *opaque)
+{
+ IntelIOMMUState *s = opaque;
+ uint64_t caps;
+
+ caps = s->flts ? VIOMMU_CAP_HW_NESTED : 0;
+
+ return caps;
+}
+
/* Unmap the whole range in the notifier's scope. */
static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n)
{
@@ -4850,6 +4861,7 @@ static PCIIOMMUOps vtd_iommu_ops = {
.register_iotlb_notifier = vtd_register_iotlb_notifier,
.unregister_iotlb_notifier = vtd_unregister_iotlb_notifier,
.ats_request_translation = vtd_ats_request_translation,
+ .get_viommu_cap = vtd_get_viommu_cap,
};
static bool vtd_decide_config(IntelIOMMUState *s, Error **errp)
--
2.47.1
