[PATCH for-4.15 0/4] xen/iommu: Collection of bug fixes for IOMMU teadorwn

[Julien Grall <julien@xxxxxxx>]

From: Julien Grall <jgrall@xxxxxxxxxx>

Hi all,

This series is a collection of bug fixes for the IOMMU teardown code.
All of them are candidate for 4.15 as they can either leak memory or
lead to host crash/host corruption.

This is sent directly on xen-devel because all the issues were either
introduced in 4.15 or happen in the domain creation code.

Cheers,

Julien Grall (4):
  xen/iommu: Check if the IOMMU was initialized before tearing down
  xen/iommu: x86: Free the IOMMU page-tables with the pgtables.lock held
  [RFC] xen/iommu: x86: Clear the root page-table before freeing the
    page-tables
  xen/iommu: x86: Don't leak the IOMMU page-tables

 xen/arch/x86/domain.c               |  2 +-
 xen/drivers/passthrough/iommu.c     | 10 +++++-
 xen/drivers/passthrough/x86/iommu.c | 47 +++++++++++++++++++++++++++--
 xen/include/asm-x86/iommu.h         |  2 +-
 4 files changed, 56 insertions(+), 5 deletions(-)

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2.17.1