Re: [for-4.15][PATCH v4 0/2] xen/iommu: Collection of bug fixes for IOMMU teardown

[Julien Grall <julien@xxxxxxx>]

Hi all,

Please ignore this version. I forgot to CC the maintainers on it. I will 
resend a new series.
Cheers,

On 23/02/2021 12:34, Julien Grall wrote:
> 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.
>
> Major changes since v3:
>      - Remove patch #3 "xen/iommu: x86: Harden the IOMMU page-table
>      allocator" as it is not strictly necessary for 4.15.
>      - Re-order the patches to avoid on a follow-up patch to fix
>      completely the issue.
>
> Major changes since v2:
>      - patch #1 "xen/x86: p2m: Don't map the special pages in the IOMMU
>      page-tables" has been removed. This requires Jan's patch [1] to
>      fully mitigate memory leaks.
>
> Cheers,
>
> [1] <90271e69-c07e-a32c-5531-a79b10ef03dd@xxxxxxxx>
>
> Julien Grall (2):
>    xen/x86: iommu: Ignore IOMMU mapping requests when a domain is dying
>    xen/iommu: x86: Clear the root page-table before freeing the
>      page-tables
>
>   xen/drivers/passthrough/amd/iommu_map.c     | 12 +++++++++++
>   xen/drivers/passthrough/amd/pci_amd_iommu.c | 12 ++++++++++-
>   xen/drivers/passthrough/vtd/iommu.c         | 24 ++++++++++++++++++++-
>   xen/drivers/passthrough/x86/iommu.c         | 19 ++++++++++++++++
>   xen/include/xen/iommu.h                     |  1 +
>   5 files changed, 66 insertions(+), 2 deletions(-)
--
Julien Grall