Translate msi address if device is behind virtio-iommu.
This logic is similar to vSMMUv3/Intel iommu emulation.
This RFC patch does not handle the case where both vsmmuv3 and
virtio-iommu are available.
Signed-off-by: Eric Auger <eric.au...@redhat.com>
Signed-off-by: Bharat Bhushan <bharat.bhus...@nxp.com>
---
v3->v4
- No changes
target/arm/kvm.c | 27 +++++++++++++++++++++++++++
target/arm/trace-events | 3 +++
2 files changed, 30 insertions(+)
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 211a7bf..895a630 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -21,7 +21,11 @@
#include "kvm_arm.h"
#include "cpu.h"
#include "internals.h"
+#include "trace.h"
#include "hw/arm/arm.h"
+#include "hw/pci/pci.h"
+#include "hw/pci/msi.h"
+#include "hw/virtio/virtio-iommu.h"
#include "exec/memattrs.h"
#include "exec/address-spaces.h"
#include "hw/boards.h"
@@ -666,6 +670,29 @@ int kvm_arm_vgic_probe(void)
int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
uint64_t address, uint32_t data, PCIDevice *dev)
{
+ AddressSpace *as = pci_device_iommu_address_space(dev);
+ IOMMUTLBEntry entry;
+ IOMMUDevice *sdev;
+ IOMMUMemoryRegionClass *imrc;
+
+ if (as == &address_space_memory) {
+ return 0;
+ }
+
+ /* MSI doorbell address is translated by an IOMMU */
+ sdev = container_of(as, IOMMUDevice, as);
+
+ imrc = memory_region_get_iommu_class_nocheck(&sdev->iommu_mr);
+
+ entry = imrc->translate(&sdev->iommu_mr, address, IOMMU_WO);
+
+ route->u.msi.address_lo = entry.translated_addr;
+ route->u.msi.address_hi = entry.translated_addr >> 32;
+
+ trace_kvm_arm_fixup_msi_route(address, sdev->devfn,
+ sdev->iommu_mr.parent_obj.name,
+ entry.translated_addr);
+
return 0;
}
diff --git a/target/arm/trace-events b/target/arm/trace-events
index 9e37131..8b3c220 100644
--- a/target/arm/trace-events
+++ b/target/arm/trace-events
@@ -8,3 +8,6 @@ arm_gt_tval_write(int timer, uint64_t value) "gt_tval_write:
timer %d value 0x%"
arm_gt_ctl_write(int timer, uint64_t value) "gt_ctl_write: timer %d value 0x%"
PRIx64
arm_gt_imask_toggle(int timer, int irqstate) "gt_ctl_write: timer %d IMASK
toggle, new irqstate %d"
arm_gt_cntvoff_write(uint64_t value) "gt_cntvoff_write: value 0x%" PRIx64
+
+# target/arm/kvm.c
+kvm_arm_fixup_msi_route(uint64_t iova, uint32_t devid, const char *name,
uint64_t gpa) "MSI addr = 0x%"PRIx64" is translated for devfn=%d through %s
into 0x%"PRIx64
--
1.9.3
