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-rw-r--r--virt/kvm/arm/mmu.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 91aaf73b00df..111a660be3be 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1860,13 +1860,20 @@ static int kvm_set_spte_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *data
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
{
unsigned long end = hva + PAGE_SIZE;
+ kvm_pfn_t pfn = pte_pfn(pte);
pte_t stage2_pte;
if (!kvm->arch.pgd)
return;
trace_kvm_set_spte_hva(hva);
- stage2_pte = pfn_pte(pte_pfn(pte), PAGE_S2);
+
+ /*
+ * We've moved a page around, probably through CoW, so let's treat it
+ * just like a translation fault and clean the cache to the PoC.
+ */
+ clean_dcache_guest_page(pfn, PAGE_SIZE);
+ stage2_pte = pfn_pte(pfn, PAGE_S2);
handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &stage2_pte);
}