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Groups > linux.kernel > #1519104
| From | Joerg Roedel <joro@8bytes.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback |
| Date | 2016-11-10 17:20 +0100 |
| Message-ID | <sC0f0-77-9@gated-at.bofh.it> (permalink) |
| References | <szKR3-112-7@gated-at.bofh.it> <szKR3-112-23@gated-at.bofh.it> <sBZLY-871-27@gated-at.bofh.it> <sC05k-8tv-17@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Nov 10, 2016 at 04:07:08PM +0000, Robin Murphy wrote:
> On 10/11/16 15:46, Joerg Roedel wrote:
> > On Fri, Nov 04, 2016 at 11:24:06AM +0000, Eric Auger wrote:
> >> + resource_list_for_each_entry(window, &bridge->windows) {
> >> + if (resource_type(window->res) != IORESOURCE_MEM &&
> >> + resource_type(window->res) != IORESOURCE_IO)
> >> + continue;
> >
> > Why do you care about IO resources?
>
> [since this is essentially code I wrote]
>
> Because they occupy some area of the PCI address space, therefore I
> assumed that, like memory windows, they would be treated as P2P. Is that
> not the case?
No, not at all. The IO-space is completly seperate from the MEM-space.
They are two different address-spaces, addressing different things. And
the IO-space is also not translated by any IOMMU I am aware of.
Joerg
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[RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Eric Auger <eric.auger@redhat.com> - 2016-11-04 12:30 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Robin Murphy <robin.murphy@arm.com> - 2016-11-04 15:20 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Joerg Roedel <joro@8bytes.org> - 2016-11-10 16:50 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Auger Eric <eric.auger@redhat.com> - 2016-11-10 17:00 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Joerg Roedel <joro@8bytes.org> - 2016-11-10 17:20 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Auger Eric <eric.auger@redhat.com> - 2016-11-10 19:10 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Joerg Roedel <joro@8bytes.org> - 2016-11-11 12:50 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Auger Eric <eric.auger@redhat.com> - 2016-11-11 16:50 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Joerg Roedel <joro@8bytes.org> - 2016-11-11 17:30 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Auger Eric <eric.auger@redhat.com> - 2016-11-11 17:50 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Robin Murphy <robin.murphy@arm.com> - 2016-11-10 17:10 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Joerg Roedel <joro@8bytes.org> - 2016-11-10 17:20 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Robin Murphy <robin.murphy@arm.com> - 2016-11-11 15:40 +0100
Re: [RFC v2 8/8] iommu/arm-smmu: implement add_reserved_regions callback Joerg Roedel <joro@8bytes.org> - 2016-11-11 16:10 +0100
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