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| author | Eric Auger <eric.auger@redhat.com> | 2020-07-03 16:59:41 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-07-03 16:59:41 +0100 |
| commit | f78069253ccf25c64e19e9889b98e499336f6c6e (patch) | |
| tree | 58303aadc1e9a6dc7054383ee1fd437fca082dc8 /include/exec | |
| parent | 6552bbc6a3de22f0d975091a07f180e7baf1915b (diff) | |
| download | qemu-f78069253ccf25c64e19e9889b98e499336f6c6e.zip | |
qdev: Introduce DEFINE_PROP_RESERVED_REGION
Introduce a new property defining a reserved region:
<low address>:<high address>:<type>.
This will be used to encode reserved IOVA regions.
For instance, in virtio-iommu use case, reserved IOVA regions
will be passed by the machine code to the virtio-iommu-pci
device (an array of those). The type of the reserved region
will match the virtio_iommu_probe_resv_mem subtype value:
- VIRTIO_IOMMU_RESV_MEM_T_RESERVED (0)
- VIRTIO_IOMMU_RESV_MEM_T_MSI (1)
on PC/Q35 machine, this will be used to inform the
virtio-iommu-pci device it should bypass the MSI region.
The reserved region will be: 0xfee00000:0xfeefffff:1.
On ARM, we can declare the ITS MSI doorbell as an MSI
region to prevent MSIs from being mapped on guest side.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200629070404.10969-2-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/memory.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 7207025bd4..84ee5b7a01 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -51,6 +51,12 @@ extern bool global_dirty_log; typedef struct MemoryRegionOps MemoryRegionOps; +struct ReservedRegion { + hwaddr low; + hwaddr high; + unsigned type; +}; + typedef struct IOMMUTLBEntry IOMMUTLBEntry; /* See address_space_translate: bit 0 is read, bit 1 is write. */ |