| commit | 903ed3a54df2f6234c50f696b8a3db78c26ea119 | |
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | |
| Wed, 17 Sep 2014 21:56:19 +0000 (17 14:56 -0700) | ||
| committer | Christoffer Dall <christoffer.dall@linaro.org> | |
| Fri, 10 Oct 2014 11:07:37 +0000 (10 13:07 +0200) | ||
| tree | ef6dc319edb2eff96ca9790bab33c239b261c582 | treesnapshot (tar.gz zip) |
| parent | c40f2f8ff833eddc02cb599ef6e5a162223449ba | commitdiff |
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>
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>
| arch/arm/include/asm/pgtable.h | diffblobblamehistory |