Re: [PATCH 07/10] iommu/amd: copy old dev tables and do not touch dev tables

From	Joerg Roedel <joro@8bytes.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 07/10] iommu/amd: copy old dev tables and do not touch dev tables
Date	2015-09-29 18:10 +0200
Message-ID	<qe5DB-2XB-25@gated-at.bofh.it> (permalink)
References	<qc8md-3vB-3@gated-at.bofh.it> <qc8me-3vB-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Sep 24, 2015 at 02:37:33PM +0800, Baoquan He wrote:
> +		 if ( !translation_pre_enabled() ) {
> +			iommu_disable(iommu);
> +			iommu_init_flags(iommu);
> +			iommu_set_device_table(iommu);
> +			iommu_enable_command_buffer(iommu);
> +			iommu_enable_event_buffer(iommu);
> +			iommu_set_exclusion_range(iommu);
> +			iommu_enable(iommu);
> +			iommu_flush_all_caches(iommu);
> +		} else {
> +			copy_dev_tables();
> +			copy_command_buffer();
> +			copy_event_buffer();
> +		}

Hmm, this leaves the old device-table in place and removes flushing the
iommu-caches in kdump kernel, right?


	Joerg

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[PATCH 07/10] iommu/amd: copy old dev tables and do not touch dev tables Baoquan He <bhe@redhat.com> - 2015-09-24 08:40 +0200
  Re: [PATCH 07/10] iommu/amd: copy old dev tables and do not touch  dev tables Joerg Roedel <joro@8bytes.org> - 2015-09-29 18:10 +0200

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