diff options
| -rw-r--r-- | arch/powerpc/kvm/e500_tlb.c | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/mmu.c | 7 | ||||
| -rw-r--r-- | arch/x86/kvm/mmu_audit.c | 4 | ||||
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 8 | ||||
| -rw-r--r-- | virt/kvm/iommu.c | 1 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 14 |
6 files changed, 14 insertions, 21 deletions
diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index c8f6c5826742..09ce5ac128f8 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -524,7 +524,6 @@ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, if (is_error_pfn(pfn)) { printk(KERN_ERR "Couldn't get real page for gfn %lx!\n", (long)gfn); - kvm_release_pfn_clean(pfn); return; } diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index d3cdf69da513..9651c2cd0005 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2496,7 +2496,9 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep, rmap_recycle(vcpu, sptep, gfn); } } - kvm_release_pfn_clean(pfn); + + if (!is_error_pfn(pfn)) + kvm_release_pfn_clean(pfn); } static void nonpaging_new_cr3(struct kvm_vcpu *vcpu) @@ -2648,7 +2650,6 @@ static void kvm_send_hwpoison_signal(unsigned long address, struct task_struct * static int kvm_handle_bad_page(struct kvm_vcpu *vcpu, gfn_t gfn, pfn_t pfn) { - kvm_release_pfn_clean(pfn); if (pfn == KVM_PFN_ERR_HWPOISON) { kvm_send_hwpoison_signal(gfn_to_hva(vcpu->kvm, gfn), current); return 0; @@ -3273,8 +3274,6 @@ static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn, if (!async) return false; /* *pfn has correct page already */ - kvm_release_pfn_clean(*pfn); - if (!prefault && can_do_async_pf(vcpu)) { trace_kvm_try_async_get_page(gva, gfn); if (kvm_find_async_pf_gfn(vcpu, gfn)) { diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c index ca403f9bb0f2..daff69e21150 100644 --- a/arch/x86/kvm/mmu_audit.c +++ b/arch/x86/kvm/mmu_audit.c @@ -116,10 +116,8 @@ static void audit_mappings(struct kvm_vcpu *vcpu, u64 *sptep, int level) gfn = kvm_mmu_page_get_gfn(sp, sptep - sp->spt); pfn = gfn_to_pfn_atomic(vcpu->kvm, gfn); - if (is_error_pfn(pfn)) { - kvm_release_pfn_clean(pfn); + if (is_error_pfn(pfn)) return; - } hpa = pfn << PAGE_SHIFT; if ((*sptep & PT64_BASE_ADDR_MASK) != hpa) diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index bb7cf01cae76..bf8c42bf50fe 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -370,10 +370,8 @@ static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, pgprintk("%s: gpte %llx spte %p\n", __func__, (u64)gpte, spte); pte_access = sp->role.access & FNAME(gpte_access)(vcpu, gpte, true); pfn = gfn_to_pfn_atomic(vcpu->kvm, gpte_to_gfn(gpte)); - if (mmu_invalid_pfn(pfn)) { - kvm_release_pfn_clean(pfn); + if (mmu_invalid_pfn(pfn)) return; - } /* * we call mmu_set_spte() with host_writable = true because that @@ -448,10 +446,8 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw, gfn = gpte_to_gfn(gpte); pfn = pte_prefetch_gfn_to_pfn(vcpu, gfn, pte_access & ACC_WRITE_MASK); - if (mmu_invalid_pfn(pfn)) { - kvm_release_pfn_clean(pfn); + if (mmu_invalid_pfn(pfn)) break; - } mmu_set_spte(vcpu, spte, sp->role.access, pte_access, 0, 0, NULL, PT_PAGE_TABLE_LEVEL, gfn, diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c index 6a67bea4019c..037cb6730e68 100644 --- a/virt/kvm/iommu.c +++ b/virt/kvm/iommu.c @@ -107,7 +107,6 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot) */ pfn = kvm_pin_pages(slot, gfn, page_size); if (is_error_pfn(pfn)) { - kvm_release_pfn_clean(pfn); gfn += 1; continue; } diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 93d3c6e063c8..eafba99d1070 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -102,9 +102,6 @@ static bool largepages_enabled = true; bool kvm_is_mmio_pfn(pfn_t pfn) { - if (is_error_pfn(pfn)) - return false; - if (pfn_valid(pfn)) { int reserved; struct page *tail = pfn_to_page(pfn); @@ -1165,10 +1162,13 @@ EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic); static struct page *kvm_pfn_to_page(pfn_t pfn) { - WARN_ON(kvm_is_mmio_pfn(pfn)); + if (is_error_pfn(pfn)) + return KVM_ERR_PTR_BAD_PAGE; - if (is_error_pfn(pfn) || kvm_is_mmio_pfn(pfn)) + if (kvm_is_mmio_pfn(pfn)) { + WARN_ON(1); return KVM_ERR_PTR_BAD_PAGE; + } return pfn_to_page(pfn); } @@ -1193,7 +1193,9 @@ EXPORT_SYMBOL_GPL(kvm_release_page_clean); void kvm_release_pfn_clean(pfn_t pfn) { - if (!is_error_pfn(pfn) && !kvm_is_mmio_pfn(pfn)) + WARN_ON(is_error_pfn(pfn)); + + if (!kvm_is_mmio_pfn(pfn)) put_page(pfn_to_page(pfn)); } EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); |