tree eba4cdf8b80f67d46212e425b335214aafdeb1cf
parent 333a53ff7fb9d836ff4a2b7f266ac9b2bb85e873
author Marc Zyngier <marc.zyngier@arm.com> 1468752527 +0100
committer Marc Zyngier <marc.zyngier@arm.com> 1468862118 +0100

KVM: arm64: vgic-its: Fix L2 entry validation for indirect tables

When checking that the storage address of a device entry is valid,
it is critical to compute the actual address of the entry, rather
than relying on the beginning of the page to match a CPU page of
the same size: for example, if the guest places the table at the
last 64kB boundary of RAM, but RAM size isn't a multiple of 64kB...

Fix this by computing the actual offset of the device ID in the
L2 page, and check the corresponding GFN.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>