From: Marc Zyngier <marc.zyngier@arm.com>
Date: Tue, 8 Jul 2014 11:09:04 +0000 (+0100)
Subject: arm/arm64: KVM: vgic: handle out-of-range MMIO accesses
X-Git-Tag: fixes-for-v3.18-merge-window~23^2~3^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3c918361adcceb816c92b21dd95d2b46fb96a8f;p=pandora-kernel.git

arm/arm64: KVM: vgic: handle out-of-range MMIO accesses

Now that we can (almost) dynamically size the number of interrupts,
we're facing an interesting issue:

We have to evaluate at runtime whether or not an access hits a valid
register, based on the sizing of this particular instance of the
distributor. Furthermore, the GIC spec says that accessing a reserved
register is RAZ/WI.

For this, add a new field to our range structure, indicating the number
of bits a single interrupts uses. That allows us to find out whether or
not the access is in range.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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