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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2015-06-05 16:35:02 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-06-11 15:14:56 +1000 |
| commit | 3c56e822f8fb0105949d04bda0e549e9d08713cd (patch) | |
| tree | 61ec37ee7a4e0bf512a50547dd59e86188a03308 /drivers/vfio | |
| parent | 2d270df8f71a0fded9ef01cb9282b46fd3bc0986 (diff) | |
| download | linux-stable-3c56e822f8fb0105949d04bda0e549e9d08713cd.tar.gz linux-stable-3c56e822f8fb0105949d04bda0e549e9d08713cd.tar.bz2 linux-stable-3c56e822f8fb0105949d04bda0e549e9d08713cd.zip | |
vfio: powerpc/spapr: Disable DMA mappings on disabled container
At the moment DMA map/unmap requests are handled irrespective to
the container's state. This allows the user space to pin memory which
it might not be allowed to pin.
This adds checks to MAP/UNMAP that the container is enabled, otherwise
-EPERM is returned.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[aw: for the vfio related changes]
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/vfio_iommu_spapr_tce.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c index 6e2e15fdb0df..5bbdf378fd59 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -318,6 +318,9 @@ static long tce_iommu_ioctl(void *iommu_data, struct iommu_table *tbl = container->tbl; unsigned long tce; + if (!container->enabled) + return -EPERM; + if (!tbl) return -ENXIO; @@ -362,6 +365,9 @@ static long tce_iommu_ioctl(void *iommu_data, struct vfio_iommu_type1_dma_unmap param; struct iommu_table *tbl = container->tbl; + if (!container->enabled) + return -EPERM; + if (WARN_ON(!tbl)) return -ENXIO; |