KVM: PPC: Validate all tces before updating tables

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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>

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Alexey Kardashevskiy 2018-09-10 18:29:08 +10:00 • committed by Michael Ellerman

parent b66081e25e

commit e199ad2bf5

2 changed files with 22 additions and 0 deletions

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18

arch/powerpc/kvm/book3s_64_vio.c

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4

arch/powerpc/kvm/book3s_64_vio_hv.c

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