From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Wed, 17 Sep 2014 21:56:19 +0000 (-0700)
Subject: ARM: kvm: define PAGE_S2_DEVICE as read-only by default
X-Git-Tag: fixes-against-v3.18-rc2~42^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=903ed3a54df2f6234c50f696b8a3db78c26ea119;p=pandora-kernel.git

ARM: kvm: define PAGE_S2_DEVICE as read-only by default

Now that we support read-only memslots, we need to make sure that
pass-through device mappings are not mapped writable if the guest
has requested them to be read-only. The existing implementation
already honours this by calling kvm_set_s2pte_writable() on the new
pte in case of writable mappings, so all we need to do is define
the default pgprot_t value used for devices to be PTE_S2_RDONLY.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
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