[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-arm] [RFC v6 16/22] virtio_iommu: Handle reserved regions in trans
From: |
Eric Auger |
Subject: |
[Qemu-arm] [RFC v6 16/22] virtio_iommu: Handle reserved regions in translation process |
Date: |
Mon, 12 Feb 2018 18:58:18 +0000 |
When translating an address we need to check if it belongs to
a reserved virtual address range. If it does, there are 2 cases:
- it belongs to a RESERVED region: the guest should neither use
this address in a MAP not instruct the end-point to DMA on
them. We report an error
- It belongs to an MSI region: we bypass the translation.
Signed-off-by: Eric Auger <address@hidden>
---
hw/virtio/virtio-iommu.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 010e8e0..a8fabef 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -752,6 +752,7 @@ static IOMMUTLBEntry
virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
viommu_mapping *mapping;
viommu_interval interval;
bool read_fault, write_fault;
+ struct virtio_iommu_probe_resv_mem *reg;
interval.low = addr;
interval.high = addr + 1;
@@ -777,6 +778,21 @@ static IOMMUTLBEntry
virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
goto unlock;
}
+ reg = g_tree_lookup(ep->reserved_regions, (gpointer)(&interval));
+ if (reg) {
+ switch (reg->subtype) {
+ case VIRTIO_IOMMU_RESV_MEM_T_MSI:
+ entry.perm = flag;
+ break;
+ case VIRTIO_IOMMU_RESV_MEM_T_RESERVED:
+ default:
+ virtio_iommu_report_fault(s, VIRTIO_IOMMU_FAULT_R_MAPPING,
+ 0, sid, addr);
+ break;
+ }
+ goto unlock;
+ }
+
if (!ep->domain) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s %02x:%02x.%01x not attached to any domain\n",
--
1.9.1
- [Qemu-arm] [RFC v6 06/22] virtio-iommu: Add skeleton, (continued)
- [Qemu-arm] [RFC v6 06/22] virtio-iommu: Add skeleton, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 07/22] virtio-iommu: Decode the command payload, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 08/22] virtio-iommu: Add the iommu regions, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 09/22] virtio-iommu: Register attached endpoints, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 10/22] virtio-iommu: Implement attach/detach command, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 11/22] virtio-iommu: Implement map/unmap, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 12/22] virtio-iommu: Implement translate, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 14/22] virtio-iommu: Add an msi_bypass property, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 13/22] virtio-iommu: Implement probe request, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 15/22] virtio-iommu: Implement fault reporting, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 16/22] virtio_iommu: Handle reserved regions in translation process,
Eric Auger <=
- [Qemu-arm] [RFC v6 17/22] hw/arm/virt: Add virtio-iommu to the virt board, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 18/22] hw/arm/virt-acpi-build: Add virtio-iommu node in IORT table, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 19/22] memory.h: Add set_page_size_mask IOMMUMemoryRegion callback, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 20/22] hw/vfio/common: Set the IOMMUMemoryRegion supported page sizes, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 21/22] virtio-iommu: Implement set_page_size_mask, Eric Auger, 2018/02/12
- [Qemu-arm] [RFC v6 22/22] hw/vfio/common: Do not print error when viommu translates into an mmio region, Eric Auger, 2018/02/12