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SubjectRe: [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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