linux-kernel - Re: [PATCH 00/19] Fix Intel IOMMU breakage in kdump kernel

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Date:	Thu, 25 Jun 2015 14:40:20 +0800
From:	"Li, ZhenHua" <zhen-hual@...com>
To:	Joerg Roedel <joro@...tes.org>
CC:	iommu@...ts.linux-foundation.org,
	David Woodhouse <dwmw2@...radead.org>, bhe@...hat.com,
	ddutile@...hat.com, alex.williamson@...hat.com, dyoung@...hat.com,
	linux-kernel@...r.kernel.org, jroedel@...tes.org,
	"Li, ZhenHua" <zhen-hual@...com>
Subject: Re: [PATCH 00/19] Fix Intel IOMMU breakage in kdump kernel

Hi all,
I see Joerg has backported it to sles12 in the commoent of novel
bugzilla 856382, so I will only backport it to redhat el.

Thanks
Zhenhua

On 06/13/2015 02:47 PM, Joerg Roedel wrote:
> Hi,
>
> as David Woodhouse pointed out, my fixes and cleanups for
> the original patch-set turned out to be a complete rewrite.
> So to have a cleaner history of the feature and to make
> backporting easier, here is a rewrite of my changes based on
> v4.1-rc7.
>
> Some additional issues have been fixed by this rewrite, like
> a kdump-kernel boot panic with 'iommu=pt' and support for
> copying the extended root-entry and context table formats
> has been added.
>
> I plan to rebuild the x86/vt-d branch of the iommu tree with
> these patches.
>
> Regards,
>
> 	Joerg
>
> Joerg Roedel (19):
>    iommu/vt-d: Cleanup log messages
>    iommu/vt-d: Init QI before root entry is allocated
>    iommu/vt-d: Make root entry visible for hardware right after
>      allocation
>    iommu/vt-d: Detect pre enabled translation
>    iommu/vt-d: Copy translation tables from old kernel
>    iommu/vt-d: Do not re-use domain-ids from the old kernel
>    iommu/vt-d: Mark copied context entries
>    iommu/vt-d: Allocate si_domain in init_dmars()
>    iommu/vt-d: Don't do early domain assignment if kdump kernel
>    iommu/vt-d: Don't copy translation tables if RTT bit needs to be
>      changed
>    iommu/vt-d: Don't disable translation prior to OS handover
>    iommu/vt-d: Enable Translation only if it was previously disabled
>    iommu/vt-d: Move EIM detection to intel_prepare_irq_remapping
>    iommu/vt-d: Move QI initializationt to intel_setup_irq_remapping
>    iommu/vt-d: Disable IRQ remapping in intel_prepare_irq_remapping
>    iommu/vt-d: Set IRTA in intel_setup_irq_remapping
>    iommu/vt-d: Copy IR table from old kernel when in kdump mode
>    iommu/vt-d: Make sure copied over IR entries are not reused
>    iommu/vt-d: Don't disable IR when it was previously enabled
>
>   drivers/iommu/dmar.c                |  28 +-
>   drivers/iommu/intel-iommu.c         | 495 ++++++++++++++++++++++++++++--------
>   drivers/iommu/intel_irq_remapping.c | 255 ++++++++++++-------
>   include/linux/intel-iommu.h         |   5 +
>   4 files changed, 573 insertions(+), 210 deletions(-)
>

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