diff options
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_host.c | 37 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_mmu_hpte.c | 14 |
3 files changed, 39 insertions, 13 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index a07bd7e7d4a4..0ec00f4fef91 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -142,6 +142,7 @@ extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr, extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte); extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu); +extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte); extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu); extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu); extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte); diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c index cc9fb89b8884..307e6e838e0d 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_host.c +++ b/arch/powerpc/kvm/book3s_64_mmu_host.c @@ -93,6 +93,13 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, int r = 0; int hpsize = MMU_PAGE_4K; bool writable; + unsigned long mmu_seq; + struct kvm *kvm = vcpu->kvm; + struct hpte_cache *cpte; + + /* used to check for invalidations in progress */ + mmu_seq = kvm->mmu_notifier_seq; + smp_rmb(); /* Get host physical address for gpa */ hpaddr = kvmppc_gfn_to_pfn(vcpu, orig_pte->raddr >> PAGE_SHIFT, @@ -143,6 +150,14 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, hash = hpt_hash(vpn, mmu_psize_defs[hpsize].shift, MMU_SEGSIZE_256M); + cpte = kvmppc_mmu_hpte_cache_next(vcpu); + + spin_lock(&kvm->mmu_lock); + if (!cpte || mmu_notifier_retry(kvm, mmu_seq)) { + r = -EAGAIN; + goto out_unlock; + } + map_again: hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP); @@ -150,7 +165,7 @@ map_again: if (attempt > 1) if (ppc_md.hpte_remove(hpteg) < 0) { r = -1; - goto out; + goto out_unlock; } ret = ppc_md.hpte_insert(hpteg, vpn, hpaddr, rflags, vflags, @@ -163,8 +178,6 @@ map_again: attempt++; goto map_again; } else { - struct hpte_cache *pte = kvmppc_mmu_hpte_cache_next(vcpu); - trace_kvm_book3s_64_mmu_map(rflags, hpteg, vpn, hpaddr, orig_pte); @@ -175,15 +188,21 @@ map_again: hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP); } - pte->slot = hpteg + (ret & 7); - pte->host_vpn = vpn; - pte->pte = *orig_pte; - pte->pfn = hpaddr >> PAGE_SHIFT; - pte->pagesize = hpsize; + cpte->slot = hpteg + (ret & 7); + cpte->host_vpn = vpn; + cpte->pte = *orig_pte; + cpte->pfn = hpaddr >> PAGE_SHIFT; + cpte->pagesize = hpsize; - kvmppc_mmu_hpte_cache_map(vcpu, pte); + kvmppc_mmu_hpte_cache_map(vcpu, cpte); + cpte = NULL; } + +out_unlock: + spin_unlock(&kvm->mmu_lock); kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT); + if (cpte) + kvmppc_mmu_hpte_cache_free(cpte); out: return r; diff --git a/arch/powerpc/kvm/book3s_mmu_hpte.c b/arch/powerpc/kvm/book3s_mmu_hpte.c index d2d280b16778..6b79bfc44ba5 100644 --- a/arch/powerpc/kvm/book3s_mmu_hpte.c +++ b/arch/powerpc/kvm/book3s_mmu_hpte.c @@ -98,6 +98,8 @@ void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte) &vcpu3s->hpte_hash_vpte_64k[index]); #endif + vcpu3s->hpte_cache_count++; + spin_unlock(&vcpu3s->mmu_lock); } @@ -131,10 +133,10 @@ static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte) #ifdef CONFIG_PPC_BOOK3S_64 hlist_del_init_rcu(&pte->list_vpte_64k); #endif + vcpu3s->hpte_cache_count--; spin_unlock(&vcpu3s->mmu_lock); - vcpu3s->hpte_cache_count--; call_rcu(&pte->rcu_head, free_pte_rcu); } @@ -331,15 +333,19 @@ struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu) struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu); struct hpte_cache *pte; - pte = kmem_cache_zalloc(hpte_cache, GFP_KERNEL); - vcpu3s->hpte_cache_count++; - if (vcpu3s->hpte_cache_count == HPTEG_CACHE_NUM) kvmppc_mmu_pte_flush_all(vcpu); + pte = kmem_cache_zalloc(hpte_cache, GFP_KERNEL); + return pte; } +void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte) +{ + kmem_cache_free(hpte_cache, pte); +} + void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu) { kvmppc_mmu_pte_flush(vcpu, 0, 0); |