linux-kernel - Re: [PATCH 00/20] iommu/amd: Use generic IOVA allocator

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Date:	Tue, 12 Jul 2016 12:55:33 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Wan Zongshun <vw@...mu.org>
Cc:	iommu@...ts.linux-foundation.org, Vincent.Wan@....com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/20] iommu/amd: Use generic IOVA allocator

Hey Vincent,

On Tue, Jul 12, 2016 at 05:03:08PM +0800, Wan Zongshun wrote:
> Currently, those patches can not work at my eCarrizo board.
> When I merged your patches, boot failed, and no any info print to me.
> I set iommu=pt, it also does not work; set iommu=soft, boot ok.
> 
> When I removed those patches, kernel boot ok.
> 
> This eCarrizo board uart doesnot work, so I can not get useful
> information from kernel by uart console, I also set 'text' in boot
> option, but still cannot print any log.

Thanks for your testing. The issue turned out to be an older bug, which
just got uncovered by these patches. I updated the branch at

	git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux.git amd-iommu-iova

This branch boots now on my Kaveri and Carrizo system. Can you please
give it a test too?

Thanks,

	Joerg