Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put callbacks

From	Joerg Roedel <joro@8bytes.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put callbacks
Date	2017-01-06 13:50 +0100
Message-ID	<sWC81-20x-7@gated-at.bofh.it> (permalink)
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On Fri, Jan 06, 2017 at 12:45:54PM +0100, Auger Eric wrote:
> On 06/01/2017 12:01, Joerg Roedel wrote:
> > On Thu, Jan 05, 2017 at 07:04:36PM +0000, Eric Auger wrote:

> > That is different from what AMD does, can you also report the RMRR
> > regions for the device here (as direct-map regions)?
> 
> if I return RMRR regions as direct mapped regions,
> iommu_group_create_direct_mappings will perform the 1-1 mapping.

No, this will not happen until the Intel IOMMU driver returns valid
IOMMU_DOMAIN_DMA type domains.

> I am not familiar with the intel-iommu code but I guess this job
> currently is done in the intel driver:
> iommu_prepare_rmrr_dev -> iommu_prepare_identity_map
> ->domain_prepare_identity_map -> iommu_domain_identity_map?

Right, this is done in the Intel driver atm.



	Joerg

Thread

[PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put callbacks Eric Auger <eric.auger@redhat.com> - 2017-01-05 20:10 +0100
  Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put  callbacks Joerg Roedel <joro@8bytes.org> - 2017-01-06 12:10 +0100
    Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put  callbacks Auger Eric <eric.auger@redhat.com> - 2017-01-06 13:20 +0100
      Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put  callbacks Joerg Roedel <joro@8bytes.org> - 2017-01-06 13:50 +0100
        Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put  callbacks Auger Eric <eric.auger@redhat.com> - 2017-01-06 14:10 +0100

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