Messages in this thread | | | Date | Thu, 10 Nov 2016 16:18:48 +0100 | From | Joerg Roedel <> | Subject | Re: Summary of LPC guest MSI discussion in Santa Fe |
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On Wed, Nov 09, 2016 at 08:11:16PM +0000, Robin Murphy wrote: > When we *are* in full control of the IOVA space, we just carve out what > we can find as best we can - see iova_reserve_pci_windows() in > dma-iommu.c, which isn't really all that different to what x86 does > (e.g. init_reserved_iova_ranges() in amd-iommu.c).
Yeah, that code was actually written with a look at what the Intel driver does. I don't really like that it goes over all resources and reserves them individually (not only because it is not hotplug-safe).
I have to check whether there is a nice and generic way to find out the root-bridge windows and just reserve them in the iova-space. That would be easier and more reliable.
Joerg
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