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Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev table if translation pre-enabled

From Joerg Roedel <jroedel@suse.de>
Newsgroups linux.kernel
Subject Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev table if translation pre-enabled
Date 2017-07-28 13:20 +0200
Message-ID <u8btf-2ZD-3@gated-at.bofh.it> (permalink)
References <u5BWV-2C2-5@gated-at.bofh.it> <u5BWV-2C2-3@gated-at.bofh.it> <u7TmF-7Yc-3@gated-at.bofh.it> <u89rs-1IQ-29@gated-at.bofh.it>
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On Fri, Jul 28, 2017 at 05:06:19PM +0800, Baoquan He wrote:
> Do you mean the allocation of amd_iommu_dev_table in
> early_amd_iommu_init() also need be addressed for 1st kernel? Seems we
> don't make sure that for 1st kernel, like adding GFP_DMA32 flag when
> allocate amd_iommu_dev_table in amd_iommu_dev_table
> early_amd_iommu_init().

Yes, exactly, the first device table also needs to be allocated with
GFP_DMA32 so that it ends up below 4GB.

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Thread

[PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev table if translation pre-enabled Baoquan He <bhe@redhat.com> - 2017-07-21 11:00 +0200
  Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Joerg Roedel <jroedel@suse.de> - 2017-07-27 18:00 +0200
    Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Baoquan He <bhe@redhat.com> - 2017-07-28 11:10 +0200
      Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Joerg Roedel <jroedel@suse.de> - 2017-07-28 13:20 +0200
        Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Baoquan He <bhe@redhat.com> - 2017-07-28 13:30 +0200
      Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Baoquan He <bhe@redhat.com> - 2017-07-28 13:20 +0200
      Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Joerg Roedel <jroedel@suse.de> - 2017-07-28 13:20 +0200
      Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Baoquan He <bhe@redhat.com> - 2017-07-31 12:20 +0200
        Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Baoquan He <bhe@redhat.com> - 2017-07-31 12:30 +0200
        Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev  table if translation pre-enabled Joerg Roedel <jroedel@suse.de> - 2017-07-31 12:30 +0200

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