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Re: Summary of LPC guest MSI discussion in Santa Fe

From	Joerg Roedel <joro@8bytes.org>
Newsgroups	linux.kernel
Subject	Re: Summary of LPC guest MSI discussion in Santa Fe
Date	2016-11-10 16:30 +0100
Message-ID	<sBZsB-7Yu-7@gated-at.bofh.it> (permalink)
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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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[RFC 0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II) Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  [RFC 2/8] iommu/iova: fix __alloc_and_insert_iova_range Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  [RFC 4/8] iommu: Add a list of iommu_reserved_region in iommu_domain Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  [RFC 5/8] vfio/type1: Introduce RESV_IOVA_RANGE capability Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  [RFC 3/8] iommu/dma: Allow MSI-only cookies Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  [RFC 7/8] iommu/vt-d: Implement add_reserved_regions callback Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  [RFC 1/8] vfio: fix vfio_info_cap_add/shift Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  [RFC 6/8] iommu: Handle the list of reserved regions Eric Auger <eric.auger@redhat.com> - 2016-11-03 22:50 +0100
  Re: [RFC 0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II) Alex Williamson <alex.williamson@redhat.com> - 2016-11-04 05:10 +0100
    Summary of LPC guest MSI discussion in Santa Fe (was: Re: [RFC 0/8]  KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II)) Will Deacon <will.deacon@arm.com> - 2016-11-08 03:50 +0100
      Re: Summary of LPC guest MSI discussion in Santa Fe Auger Eric <eric.auger@redhat.com> - 2016-11-08 15:30 +0100
        Re: Summary of LPC guest MSI discussion in Santa Fe Will Deacon <will.deacon@arm.com> - 2016-11-08 19:00 +0100
          Re: Summary of LPC guest MSI discussion in Santa Fe Don Dutile <ddutile@redhat.com> - 2016-11-08 20:10 +0100
            Re: Summary of LPC guest MSI discussion in Santa Fe Will Deacon <will.deacon@arm.com> - 2016-11-08 20:20 +0100
            Re: Summary of LPC guest MSI discussion in Santa Fe Auger Eric <eric.auger@redhat.com> - 2016-11-09 08:50 +0100
      Re: Summary of LPC guest MSI discussion in Santa Fe Don Dutile <ddutile@redhat.com> - 2016-11-08 17:10 +0100
      Re: Summary of LPC guest MSI discussion in Santa Fe (was: Re: [RFC  0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II)) Christoffer Dall <christoffer.dall@linaro.org> - 2016-11-08 21:30 +0100
        Re: Summary of LPC guest MSI discussion in Santa Fe (was: Re: [RFC  0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II)) Alex Williamson <alex.williamson@redhat.com> - 2016-11-09 00:40 +0100
          Re: Summary of LPC guest MSI discussion in Santa Fe Don Dutile <ddutile@redhat.com> - 2016-11-09 04:00 +0100
            Re: Summary of LPC guest MSI discussion in Santa Fe Will Deacon <will.deacon@arm.com> - 2016-11-09 18:10 +0100
              Re: Summary of LPC guest MSI discussion in Santa Fe Don Dutile <ddutile@redhat.com> - 2016-11-09 20:00 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Christoffer Dall <christoffer.dall@linaro.org> - 2016-11-09 20:30 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-09 21:10 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Joerg Roedel <joro@8bytes.org> - 2016-11-10 15:50 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-10 18:10 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Will Deacon <will.deacon@arm.com> - 2016-11-09 21:40 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-09 23:20 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Will Deacon <will.deacon@arm.com> - 2016-11-09 23:30 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-10 00:30 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Will Deacon <will.deacon@arm.com> - 2016-11-10 00:40 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-10 01:10 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Auger Eric <eric.auger@redhat.com> - 2016-11-10 01:20 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-10 02:00 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Will Deacon <will.deacon@arm.com> - 2016-11-10 03:10 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Auger Eric <eric.auger@redhat.com> - 2016-11-10 12:20 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-10 18:50 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Joerg Roedel <joro@8bytes.org> - 2016-11-11 12:20 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-11 17:00 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Alex Williamson <alex.williamson@redhat.com> - 2016-11-11 17:10 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Don Dutile <ddutile@redhat.com> - 2016-11-11 17:30 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Don Dutile <ddutile@redhat.com> - 2016-11-11 17:10 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Joerg Roedel <joro@8bytes.org> - 2016-11-10 16:00 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Robin Murphy <robin.murphy@arm.com> - 2016-11-09 21:20 +0100
                Re: Summary of LPC guest MSI discussion in Santa Fe Joerg Roedel <joro@8bytes.org> - 2016-11-10 16:30 +0100

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