[11/11] KVM: convert slots_lock to a mutex

Message ID	20091223114439.053464145@redhat.com (mailing list archive)
State	New, archived
Headers	show Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.2) with ESMTP id nBNBkLup013009 for <patchwork-kvm@patchwork.kernel.org>; Wed, 23 Dec 2009 11:46:22 GMT Message-Id: <20091223114439.053464145@redhat.com> User-Agent: quilt/0.47-1 Date: Wed, 23 Dec 2009 09:38:44 -0200 From: Marcelo Tosatti <mtosatti@redhat.com> To: kvm@vger.kernel.org Cc: avi@redhat.com, Marcelo Tosatti <mtosatti@redhat.com> Subject: [patch 11/11] KVM: convert slots_lock to a mutex References: <20091223113833.742662117@redhat.com> Content-Disposition: inline; filename=convert-slotslock-to-mutex Sender: kvm-owner@vger.kernel.org Precedence: bulk

Index: kvm/arch/x86/kvm/vmx.c =================================================================== --- kvm.orig/arch/x86/kvm/vmx.c +++ kvm/arch/x86/kvm/vmx.c @@ -2227,7 +2227,7 @@ static int alloc_apic_access_page(struct struct kvm_userspace_memory_region kvm_userspace_mem; int r = 0; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); if (kvm->arch.apic_access_page) goto out; kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; @@ -2240,7 +2240,7 @@ static int alloc_apic_access_page(struct kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); out: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return r; } @@ -2249,7 +2249,7 @@ static int alloc_identity_pagetable(stru struct kvm_userspace_memory_region kvm_userspace_mem; int r = 0; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); if (kvm->arch.ept_identity_pagetable) goto out; kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; @@ -2264,7 +2264,7 @@ static int alloc_identity_pagetable(stru kvm->arch.ept_identity_pagetable = gfn_to_page(kvm, kvm->arch.ept_identity_map_addr >> PAGE_SHIFT); out: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return r; } Index: kvm/arch/x86/kvm/x86.c =================================================================== --- kvm.orig/arch/x86/kvm/x86.c +++ kvm/arch/x86/kvm/x86.c @@ -2209,14 +2209,14 @@ static int kvm_vm_ioctl_set_nr_mmu_pages if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) return -EINVAL; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); spin_lock(&kvm->mmu_lock); kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; spin_unlock(&kvm->mmu_lock); - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return 0; } @@ -2293,7 +2293,7 @@ static int kvm_vm_ioctl_set_memory_alias if (!aliases) goto out; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); /* invalidate any gfn reference in case of deletion/shrinking */ memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases)); @@ -2329,7 +2329,7 @@ static int kvm_vm_ioctl_set_memory_alias r = 0; out_unlock: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); out: return r; } @@ -2463,7 +2463,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kv unsigned long is_dirty = 0; unsigned long *dirty_bitmap = NULL; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); r = -EINVAL; if (log->slot >= KVM_MEMORY_SLOTS) @@ -2513,7 +2513,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kv out_free: vfree(dirty_bitmap); out: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return r; } @@ -2626,7 +2626,7 @@ long kvm_arch_vm_ioctl(struct file *filp sizeof(struct kvm_pit_config))) goto out; create_pit: - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); r = -EEXIST; if (kvm->arch.vpit) goto create_pit_unlock; @@ -2635,7 +2635,7 @@ long kvm_arch_vm_ioctl(struct file *filp if (kvm->arch.vpit) r = 0; create_pit_unlock: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); break; case KVM_IRQ_LINE_STATUS: case KVM_IRQ_LINE: { Index: kvm/include/linux/kvm_host.h =================================================================== --- kvm.orig/include/linux/kvm_host.h +++ kvm/include/linux/kvm_host.h @@ -161,7 +161,7 @@ struct kvm_memslots { struct kvm { spinlock_t mmu_lock; spinlock_t requests_lock; - struct rw_semaphore slots_lock; + struct mutex slots_lock; struct mm_struct *mm; /* userspace tied to this vm */ struct kvm_memslots *memslots; struct srcu_struct srcu; Index: kvm/virt/kvm/coalesced_mmio.c =================================================================== --- kvm.orig/virt/kvm/coalesced_mmio.c +++ kvm/virt/kvm/coalesced_mmio.c @@ -110,9 +110,9 @@ int kvm_coalesced_mmio_init(struct kvm * dev->kvm = kvm; kvm->coalesced_mmio_dev = dev; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, &dev->dev); - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); if (ret < 0) goto out_free_dev; @@ -140,16 +140,16 @@ int kvm_vm_ioctl_register_coalesced_mmio if (dev == NULL) return -EINVAL; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); if (dev->nb_zones >= KVM_COALESCED_MMIO_ZONE_MAX) { - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return -ENOBUFS; } dev->zone[dev->nb_zones] = *zone; dev->nb_zones++; - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return 0; } @@ -163,7 +163,7 @@ int kvm_vm_ioctl_unregister_coalesced_mm if (dev == NULL) return -EINVAL; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); i = dev->nb_zones; while(i) { @@ -181,7 +181,7 @@ int kvm_vm_ioctl_unregister_coalesced_mm i--; } - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return 0; } Index: kvm/virt/kvm/eventfd.c =================================================================== --- kvm.orig/virt/kvm/eventfd.c +++ kvm/virt/kvm/eventfd.c @@ -496,7 +496,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, st else p->wildcard = true; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); /* Verify that there isnt a match already */ if (ioeventfd_check_collision(kvm, p)) { @@ -512,12 +512,12 @@ kvm_assign_ioeventfd(struct kvm *kvm, st list_add_tail(&p->list, &kvm->ioeventfds); - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return 0; unlock_fail: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); fail: kfree(p); @@ -539,7 +539,7 @@ kvm_deassign_ioeventfd(struct kvm *kvm, if (IS_ERR(eventfd)) return PTR_ERR(eventfd); - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) { bool wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH); @@ -559,7 +559,7 @@ kvm_deassign_ioeventfd(struct kvm *kvm, break; } - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); eventfd_ctx_put(eventfd); Index: kvm/virt/kvm/ioapic.c =================================================================== --- kvm.orig/virt/kvm/ioapic.c +++ kvm/virt/kvm/ioapic.c @@ -372,9 +372,9 @@ int kvm_ioapic_init(struct kvm *kvm) kvm_ioapic_reset(ioapic); kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops); ioapic->kvm = kvm; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, &ioapic->dev); - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); if (ret < 0) kfree(ioapic); Index: kvm/virt/kvm/kvm_main.c =================================================================== --- kvm.orig/virt/kvm/kvm_main.c +++ kvm/virt/kvm/kvm_main.c @@ -420,7 +420,7 @@ static struct kvm *kvm_create_vm(void) kvm_eventfd_init(kvm); mutex_init(&kvm->lock); mutex_init(&kvm->irq_lock); - init_rwsem(&kvm->slots_lock); + mutex_init(&kvm->slots_lock); atomic_set(&kvm->users_count, 1); spin_lock(&kvm_lock); list_add(&kvm->vm_list, &vm_list); @@ -751,9 +751,9 @@ int kvm_set_memory_region(struct kvm *kv { int r; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); r = __kvm_set_memory_region(kvm, mem, user_alloc); - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return r; } EXPORT_SYMBOL_GPL(kvm_set_memory_region); @@ -1985,7 +1985,7 @@ int kvm_io_bus_read(struct kvm *kvm, enu return -EOPNOTSUPP; } -/* Caller must have write lock on slots_lock. */ +/* Caller must hold slots_lock. */ int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, struct kvm_io_device *dev) { @@ -2007,7 +2007,7 @@ int kvm_io_bus_register_dev(struct kvm * return 0; } -/* Caller must have write lock on slots_lock. */ +/* Caller must hold slots_lock. */ int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, struct kvm_io_device *dev) { Index: kvm/arch/ia64/kvm/kvm-ia64.c =================================================================== --- kvm.orig/arch/ia64/kvm/kvm-ia64.c +++ kvm/arch/ia64/kvm/kvm-ia64.c @@ -1831,7 +1831,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kv struct kvm_memory_slot *memslot; int is_dirty = 0; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); spin_lock(&kvm->arch.dirty_log_lock); r = kvm_ia64_sync_dirty_log(kvm, log); @@ -1851,7 +1851,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kv } r = 0; out: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); spin_unlock(&kvm->arch.dirty_log_lock); return r; } Index: kvm/arch/x86/kvm/i8254.c =================================================================== --- kvm.orig/arch/x86/kvm/i8254.c +++ kvm/arch/x86/kvm/i8254.c @@ -602,7 +602,7 @@ static const struct kvm_io_device_ops sp .write = speaker_ioport_write, }; -/* Caller must have writers lock on slots_lock */ +/* Caller must hold slots_lock */ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags) { struct kvm_pit *pit; Index: kvm/arch/x86/kvm/i8259.c =================================================================== --- kvm.orig/arch/x86/kvm/i8259.c +++ kvm/arch/x86/kvm/i8259.c @@ -533,9 +533,9 @@ struct kvm_pic *kvm_create_pic(struct kv * Initialize PIO device */ kvm_iodevice_init(&s->dev, &picdev_ops); - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, &s->dev); - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); if (ret < 0) { kfree(s); return NULL;

[11/11] KVM: convert slots_lock to a mutex

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