diff options
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/coalesced_mmio.c | 12 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 39 |
2 files changed, 33 insertions, 18 deletions
diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c index 9e65feb6fa58..3710342cf6ad 100644 --- a/virt/kvm/coalesced_mmio.c +++ b/virt/kvm/coalesced_mmio.c @@ -83,6 +83,7 @@ static int coalesced_mmio_write(struct kvm_vcpu *vcpu, ring->coalesced_mmio[ring->last].phys_addr = addr; ring->coalesced_mmio[ring->last].len = len; memcpy(ring->coalesced_mmio[ring->last].data, val, len); + ring->coalesced_mmio[ring->last].pio = dev->zone.pio; smp_wmb(); ring->last = (ring->last + 1) % KVM_COALESCED_MMIO_MAX; spin_unlock(&dev->kvm->ring_lock); @@ -140,6 +141,9 @@ int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm, int ret; struct kvm_coalesced_mmio_dev *dev; + if (zone->pio != 1 && zone->pio != 0) + return -EINVAL; + dev = kzalloc(sizeof(struct kvm_coalesced_mmio_dev), GFP_KERNEL); if (!dev) return -ENOMEM; @@ -149,8 +153,9 @@ int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm, dev->zone = *zone; mutex_lock(&kvm->slots_lock); - ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, zone->addr, - zone->size, &dev->dev); + ret = kvm_io_bus_register_dev(kvm, + zone->pio ? KVM_PIO_BUS : KVM_MMIO_BUS, + zone->addr, zone->size, &dev->dev); if (ret < 0) goto out_free_dev; list_add_tail(&dev->list, &kvm->coalesced_zones); @@ -174,7 +179,8 @@ int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm, list_for_each_entry_safe(dev, tmp, &kvm->coalesced_zones, list) if (coalesced_mmio_in_range(dev, zone->addr, zone->size)) { - kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &dev->dev); + kvm_io_bus_unregister_dev(kvm, + zone->pio ? KVM_PIO_BUS : KVM_MMIO_BUS, &dev->dev); kvm_iodevice_destructor(&dev->dev); } diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index f986e31fa68c..786ade1843a2 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -219,7 +219,7 @@ bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req, me = get_cpu(); kvm_for_each_vcpu(i, vcpu, kvm) { - if (!test_bit(i, vcpu_bitmap)) + if (vcpu_bitmap && !test_bit(i, vcpu_bitmap)) continue; kvm_make_request(req, vcpu); @@ -243,12 +243,10 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req) { cpumask_var_t cpus; bool called; - static unsigned long vcpu_bitmap[BITS_TO_LONGS(KVM_MAX_VCPUS)] - = {[0 ... BITS_TO_LONGS(KVM_MAX_VCPUS)-1] = ULONG_MAX}; zalloc_cpumask_var(&cpus, GFP_ATOMIC); - called = kvm_make_vcpus_request_mask(kvm, req, vcpu_bitmap, cpus); + called = kvm_make_vcpus_request_mask(kvm, req, NULL, cpus); free_cpumask_var(cpus); return called; @@ -807,20 +805,25 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) * sorted array and known changed memslot position. */ static void update_memslots(struct kvm_memslots *slots, - struct kvm_memory_slot *new) + struct kvm_memory_slot *new, + enum kvm_mr_change change) { int id = new->id; int i = slots->id_to_index[id]; struct kvm_memory_slot *mslots = slots->memslots; WARN_ON(mslots[i].id != id); - if (!new->npages) { - WARN_ON(!mslots[i].npages); - if (mslots[i].npages) - slots->used_slots--; - } else { - if (!mslots[i].npages) - slots->used_slots++; + switch (change) { + case KVM_MR_CREATE: + slots->used_slots++; + WARN_ON(mslots[i].npages || !new->npages); + break; + case KVM_MR_DELETE: + slots->used_slots--; + WARN_ON(new->npages || !mslots[i].npages); + break; + default: + break; } while (i < KVM_MEM_SLOTS_NUM - 1 && @@ -1056,7 +1059,7 @@ int __kvm_set_memory_region(struct kvm *kvm, memset(&new.arch, 0, sizeof(new.arch)); } - update_memslots(slots, &new); + update_memslots(slots, &new, change); old_memslots = install_new_memslots(kvm, as_id, slots); kvm_arch_commit_memory_region(kvm, mem, &old, &new, change); @@ -1311,8 +1314,12 @@ unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn) EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_hva); /* - * If writable is set to false, the hva returned by this function is only - * allowed to be read. + * Return the hva of a @gfn and the R/W attribute if possible. + * + * @slot: the kvm_memory_slot which contains @gfn + * @gfn: the gfn to be translated + * @writable: used to return the read/write attribute of the @slot if the hva + * is valid and @writable is not NULL */ unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn, bool *writable) @@ -2946,6 +2953,8 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) #ifdef CONFIG_KVM_MMIO case KVM_CAP_COALESCED_MMIO: return KVM_COALESCED_MMIO_PAGE_OFFSET; + case KVM_CAP_COALESCED_PIO: + return 1; #endif #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING case KVM_CAP_IRQ_ROUTING: |