[PATCH v3 06/11] ARM: KVM: force cache clean on page fault when caches are off

[Catalin Marinas]

On Wed, Feb 05, 2014 at 07:55:46PM +0000, Marc Zyngier wrote:
> In order for a guest with caches disabled to observe data written
> contained in a given page, we need to make sure that page is
> committed to memory, and not just hanging in the cache (as guest
> accesses are completely bypassing the cache until it decides to
> enable it).
> 
> For this purpose, hook into the coherent_cache_guest_page
> function and flush the region if the guest SCTLR
> register doesn't show the MMU and caches as being enabled.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
> Reviewed-by: Christoffer Dall <christoffer.dall at linaro.org>

Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>