]> git.baikalelectronics.ru Git - kernel.git/commit
arm64: KVM: force cache clean on page fault when caches are off
authorMarc Zyngier <marc.zyngier@arm.com>
Tue, 14 Jan 2014 19:13:10 +0000 (19:13 +0000)
committerMarc Zyngier <marc.zyngier@arm.com>
Mon, 3 Mar 2014 01:15:20 +0000 (01:15 +0000)
commitd51ace9e18d6b94c7ed8836f627221c7f0d74112
treeedd6af8c4b9f314684b372712babfb8abb323450
parent90382b2e9672a3086c42418669edae38114e1a10
arm64: KVM: force cache clean on page fault when caches are off

In order for the guest with caches off 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_icache_guest_page
function and flush the region if the guest SCTLR_EL1
register doesn't show the MMU  and caches as being enabled.
The function also get renamed to coherent_cache_guest_page.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
arch/arm/include/asm/kvm_mmu.h
arch/arm/kvm/mmu.c
arch/arm64/include/asm/kvm_mmu.h