diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2014-01-14 19:13:10 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2014-03-03 01:15:20 +0000 |
| commit | 2d58b733c87689d3d5144e4ac94ea861cc729145 (patch) | |
| tree | edd6af8c4b9f314684b372712babfb8abb323450 /arch/arm/include/asm | |
| parent | 1b385cbdd74aa803e966e01e5fe49490d6044e30 (diff) | |
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>
Diffstat (limited to 'arch/arm/include/asm')
| -rw-r--r-- | arch/arm/include/asm/kvm_mmu.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h index 2d122adcdb2..6d0f3d3023b 100644 --- a/arch/arm/include/asm/kvm_mmu.h +++ b/arch/arm/include/asm/kvm_mmu.h @@ -116,8 +116,8 @@ static inline void kvm_set_s2pmd_writable(pmd_t *pmd) struct kvm; -static inline void coherent_icache_guest_page(struct kvm *kvm, hva_t hva, - unsigned long size) +static inline void coherent_cache_guest_page(struct kvm_vcpu *vcpu, hva_t hva, + unsigned long size) { /* * If we are going to insert an instruction page and the icache is |