arm/arm64: KVM: Check that IDMAP doesn't intersect with VA range

Browse source

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>

...

This commit is contained in:

Marc Zyngier 2016-06-30 18:40:50 +01:00 • committed by Christoffer Dall

parent f7bec68d2f

commit eac378a9ce

1 changed files with 15 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

15

arch/arm/kvm/mmu.c

View file