diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_mmu_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_hv.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index d95d11322a1599..c8d5fd19bb590f 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -40,6 +40,8 @@ /* Power architecture requires HPT is at least 256kB */ #define PPC_MIN_HPT_ORDER 18 +static void kvmppc_rmap_reset(struct kvm *kvm); + long kvmppc_alloc_hpt(struct kvm *kvm, u32 *htab_orderp) { unsigned long hpt; @@ -137,6 +139,10 @@ long kvmppc_alloc_reset_hpt(struct kvm *kvm, u32 *htab_orderp) /* Set the entire HPT to 0, i.e. invalid HPTEs */ memset((void *)kvm->arch.hpt_virt, 0, 1ul << order); /* + * Reset all the reverse-mapping chains for all memslots + */ + kvmppc_rmap_reset(kvm); + /* * Set the whole last_vcpu array to an invalid vcpu number. * This ensures that each vcpu will flush its TLB on next entry. */ @@ -756,6 +762,25 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, goto out_put; } +static void kvmppc_rmap_reset(struct kvm *kvm) +{ + struct kvm_memslots *slots; + struct kvm_memory_slot *memslot; + int srcu_idx; + + srcu_idx = srcu_read_lock(&kvm->srcu); + slots = kvm->memslots; + kvm_for_each_memslot(memslot, slots) { + /* + * This assumes it is acceptable to lose reference and + * change bits across a reset. + */ + memset(memslot->arch.rmap, 0, + memslot->npages * sizeof(*memslot->arch.rmap)); + } + srcu_read_unlock(&kvm->srcu, srcu_idx); +} + static int kvm_handle_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, |