arm/arm64: KVM: Check that IDMAP doesn't intersect with VA range
authorMarc Zyngier <marc.zyngier@arm.com>
Thu, 30 Jun 2016 17:40:50 +0000 (18:40 +0100)
committerChristoffer Dall <christoffer.dall@linaro.org>
Sun, 3 Jul 2016 21:41:27 +0000 (23:41 +0200)
commiteac378a9ceb7196b776a965d915e02995fb8ba55
tree207965331a3cb620ebcd081ac61b1580a2a7cf90
parentf7bec68d2faed8180d7172cdbd69d99e3cad1387
arm/arm64: KVM: Check that IDMAP doesn't intersect with VA range

This is more of a safety measure than anything else: If we end-up
with an idmap page that intersect with the range picked for the
the HYP VA space, abort the KVM setup, as it is unsafe to go
further.

I cannot imagine it happening on 64bit (we have a mechanism to
work around it), but could potentially occur on a 32bit system with
the kernel loaded high enough in memory so that in conflicts with
the kernel VA.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
arch/arm/kvm/mmu.c