KVM: PPC: Validate all tces before updating tables
authorAlexey Kardashevskiy <aik@ozlabs.ru>
Mon, 10 Sep 2018 08:29:08 +0000 (18:29 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 2 Oct 2018 13:09:26 +0000 (23:09 +1000)
commite199ad2bf5cf7a6d15747a97da4ec1084bd6aae1
tree63f4857c8f033bbe7e76576a3561c1f7962c6cdc
parentb66081e25e2865464e3101bcc4a071bcc4e47dbb
KVM: PPC: Validate all tces before updating tables

The KVM TCE handlers are written in a way so they fail when either
something went horribly wrong or the userspace did some obvious mistake
such as passing a misaligned address.

We are going to enhance the TCE checker to fail on attempts to map bigger
IOMMU page than the underlying pinned memory so let's valitate TCE
beforehand.

This should cause no behavioral change.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kvm/book3s_64_vio.c
arch/powerpc/kvm/book3s_64_vio_hv.c