Messages in this thread | | | Date | Wed, 16 Sep 2020 11:41:59 +0200 | From | Cornelia Huck <> | Subject | Re: [PATCH v3] vfio iommu: Add dma available capability |
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On Tue, 15 Sep 2020 15:05:18 -0400 Matthew Rosato <mjrosato@linux.ibm.com> wrote:
> Commit 492855939bdb ("vfio/type1: Limit DMA mappings per container") > added the ability to limit the number of memory backed DMA mappings. > However on s390x, when lazy mapping is in use, we use a very large > number of concurrent mappings. Let's provide the current allowable > number of DMA mappings to userspace via the IOMMU info chain so that > userspace can take appropriate mitigation. > > Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> > --- > drivers/vfio/vfio_iommu_type1.c | 17 +++++++++++++++++ > include/uapi/linux/vfio.h | 15 +++++++++++++++ > 2 files changed, 32 insertions(+)
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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