From f78069253ccf25c64e19e9889b98e499336f6c6e Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Fri, 3 Jul 2020 16:59:41 +0100 Subject: qdev: Introduce DEFINE_PROP_RESERVED_REGION Introduce a new property defining a reserved region: ::. 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 Reviewed-by: Markus Armbruster Reviewed-by: Michael S. Tsirkin Message-id: 20200629070404.10969-2-eric.auger@redhat.com Signed-off-by: Peter Maydell --- include/exec/memory.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/exec') 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. */ -- cgit v1.2.3-55-g7522