Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Gleb Natapov:
 "Highlights of the updates are:

  general:
   - new emulated device API
   - legacy device assignment is now optional
   - irqfd interface is more generic and can be shared between arches

  x86:
   - VMCS shadow support and other nested VMX improvements
   - APIC virtualization and Posted Interrupt hardware support
   - Optimize mmio spte zapping

  ppc:
    - BookE: in-kernel MPIC emulation with irqfd support
    - Book3S: in-kernel XICS emulation (incomplete)
    - Book3S: HV: migration fixes
    - BookE: more debug support preparation
    - BookE: e6500 support

  ARM:
   - reworking of Hyp idmaps

  s390:
   - ioeventfd for virtio-ccw

  And many other bug fixes, cleanups and improvements"

* tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (204 commits)
  kvm: Add compat_ioctl for device control API
  KVM: x86: Account for failing enable_irq_window for NMI window request
  KVM: PPC: Book3S: Add API for in-kernel XICS emulation
  kvm/ppc/mpic: fix missing unlock in set_base_addr()
  kvm/ppc: Hold srcu lock when calling kvm_io_bus_read/write
  kvm/ppc/mpic: remove users
  kvm/ppc/mpic: fix mmio region lists when multiple guests used
  kvm/ppc/mpic: remove default routes from documentation
  kvm: KVM_CAP_IOMMU only available with device assignment
  ARM: KVM: iterate over all CPUs for CPU compatibility check
  KVM: ARM: Fix spelling in error message
  ARM: KVM: define KVM_ARM_MAX_VCPUS unconditionally
  KVM: ARM: Fix API documentation for ONE_REG encoding
  ARM: KVM: promote vfp_host pointer to generic host cpu context
  ARM: KVM: add architecture specific hook for capabilities
  ARM: KVM: perform HYP initilization for hotplugged CPUs
  ARM: KVM: switch to a dual-step HYP init code
  ARM: KVM: rework HYP page table freeing
  ARM: KVM: enforce maximum size for identity mapped code
  ARM: KVM: move to a KVM provided HYP idmap
  ...

1 files changed, 112 insertions, 54 deletions

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index c13958251927..f0eea07d2c2b 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -117,14 +117,13 @@ static inline bool is_error_page(struct page *page)
 #define KVM_REQ_APF_HALT          12
 #define KVM_REQ_STEAL_UPDATE      13
 #define KVM_REQ_NMI               14
-#define KVM_REQ_IMMEDIATE_EXIT    15
-#define KVM_REQ_PMU               16
-#define KVM_REQ_PMI               17
-#define KVM_REQ_WATCHDOG          18
-#define KVM_REQ_MASTERCLOCK_UPDATE 19
-#define KVM_REQ_MCLOCK_INPROGRESS 20
-#define KVM_REQ_EPR_EXIT          21
-#define KVM_REQ_EOIBITMAP         22
+#define KVM_REQ_PMU               15
+#define KVM_REQ_PMI               16
+#define KVM_REQ_WATCHDOG          17
+#define KVM_REQ_MASTERCLOCK_UPDATE 18
+#define KVM_REQ_MCLOCK_INPROGRESS 19
+#define KVM_REQ_EPR_EXIT          20
+#define KVM_REQ_SCAN_IOAPIC       21
 
 #define KVM_USERSPACE_IRQ_SOURCE_ID             0
 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID        1
@@ -133,6 +132,9 @@ struct kvm;
 struct kvm_vcpu;
 extern struct kmem_cache *kvm_vcpu_cache;
 
+extern raw_spinlock_t kvm_lock;
+extern struct list_head vm_list;
+
 struct kvm_io_range {
         gpa_t addr;
         int len;
@@ -149,6 +151,7 @@ struct kvm_io_bus {
 enum kvm_bus {
         KVM_MMIO_BUS,
         KVM_PIO_BUS,
+        KVM_VIRTIO_CCW_NOTIFY_BUS,
         KVM_NR_BUSES
 };
 
@@ -252,6 +255,7 @@ struct kvm_vcpu {
                 bool dy_eligible;
         } spin_loop;
 #endif
+        bool preempted;
         struct kvm_vcpu_arch arch;
 };
 
@@ -285,7 +289,8 @@ struct kvm_kernel_irq_routing_entry {
         u32 gsi;
         u32 type;
         int (*set)(struct kvm_kernel_irq_routing_entry *e,
-                   struct kvm *kvm, int irq_source_id, int level);
+                   struct kvm *kvm, int irq_source_id, int level,
+                   bool line_status);
         union {
                 struct {
                         unsigned irqchip;
@@ -296,10 +301,10 @@ struct kvm_kernel_irq_routing_entry {
         struct hlist_node link;
 };
 
-#ifdef __KVM_HAVE_IOAPIC
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 
 struct kvm_irq_routing_table {
-        int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
+        int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
         struct kvm_kernel_irq_routing_entry *rt_entries;
         u32 nr_rt_entries;
         /*
@@ -385,6 +390,7 @@ struct kvm {
         long mmu_notifier_count;
 #endif
         long tlbs_dirty;
+        struct list_head devices;
 };
 
 #define kvm_err(fmt, ...) \
@@ -424,6 +430,19 @@ void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 void vcpu_put(struct kvm_vcpu *vcpu);
 
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+int kvm_irqfd_init(void);
+void kvm_irqfd_exit(void);
+#else
+static inline int kvm_irqfd_init(void)
+{
+        return 0;
+}
+
+static inline void kvm_irqfd_exit(void)
+{
+}
+#endif
 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
                   struct module *module);
 void kvm_exit(void);
@@ -452,24 +471,39 @@ id_to_memslot(struct kvm_memslots *slots, int id)
         return slot;
 }
 
+/*
+ * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
+ * - create a new memory slot
+ * - delete an existing memory slot
+ * - modify an existing memory slot
+ *   -- move it in the guest physical memory space
+ *   -- just change its flags
+ *
+ * Since flags can be changed by some of these operations, the following
+ * differentiation is the best we can do for __kvm_set_memory_region():
+ */
+enum kvm_mr_change {
+        KVM_MR_CREATE,
+        KVM_MR_DELETE,
+        KVM_MR_MOVE,
+        KVM_MR_FLAGS_ONLY,
+};
+
 int kvm_set_memory_region(struct kvm *kvm,
-                          struct kvm_userspace_memory_region *mem,
-                          bool user_alloc);
+                          struct kvm_userspace_memory_region *mem);
 int __kvm_set_memory_region(struct kvm *kvm,
-                            struct kvm_userspace_memory_region *mem,
-                            bool user_alloc);
+                            struct kvm_userspace_memory_region *mem);
 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
                            struct kvm_memory_slot *dont);
 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
 int kvm_arch_prepare_memory_region(struct kvm *kvm,
                                 struct kvm_memory_slot *memslot,
-                                struct kvm_memory_slot old,
                                 struct kvm_userspace_memory_region *mem,
-                                bool user_alloc);
+                                enum kvm_mr_change change);
 void kvm_arch_commit_memory_region(struct kvm *kvm,
                                 struct kvm_userspace_memory_region *mem,
-                                struct kvm_memory_slot old,
-                                bool user_alloc);
+                                const struct kvm_memory_slot *old,
+                                enum kvm_mr_change change);
 bool kvm_largepages_enabled(void);
 void kvm_disable_largepages(void);
 /* flush all memory translations */
@@ -539,7 +573,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 void kvm_flush_remote_tlbs(struct kvm *kvm);
 void kvm_reload_remote_mmus(struct kvm *kvm);
 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
-void kvm_make_update_eoibitmap_request(struct kvm *kvm);
+void kvm_make_scan_ioapic_request(struct kvm *kvm);
 
 long kvm_arch_dev_ioctl(struct file *filp,
                         unsigned int ioctl, unsigned long arg);
@@ -555,10 +589,9 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
                                 struct kvm_dirty_log *log);
 
 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
-                                   struct
-                                   kvm_userspace_memory_region *mem,
-                                   bool user_alloc);
-int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
+                                   struct kvm_userspace_memory_region *mem);
+int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
+                        bool line_status);
 long kvm_arch_vm_ioctl(struct file *filp,
                        unsigned int ioctl, unsigned long arg);
 
@@ -632,7 +665,6 @@ static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
 
 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
 void kvm_arch_destroy_vm(struct kvm *kvm);
-void kvm_free_all_assigned_devices(struct kvm *kvm);
 void kvm_arch_sync_events(struct kvm *kvm);
 
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
@@ -684,15 +716,11 @@ void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
                              bool mask);
 
-#ifdef __KVM_HAVE_IOAPIC
-void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
-                                   union kvm_ioapic_redirect_entry *entry,
-                                   unsigned long *deliver_bitmask);
-#endif
-int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
+int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
+                bool line_status);
 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
-                int irq_source_id, int level);
+                int irq_source_id, int level, bool line_status);
 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 void kvm_register_irq_ack_notifier(struct kvm *kvm,
@@ -705,7 +733,7 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 /* For vcpu->arch.iommu_flags */
 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 
-#ifdef CONFIG_IOMMU_API
+#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 int kvm_iommu_map_guest(struct kvm *kvm);
@@ -714,7 +742,7 @@ int kvm_assign_device(struct kvm *kvm,
                       struct kvm_assigned_dev_kernel *assigned_dev);
 int kvm_deassign_device(struct kvm *kvm,
                         struct kvm_assigned_dev_kernel *assigned_dev);
-#else /* CONFIG_IOMMU_API */
+#else
 static inline int kvm_iommu_map_pages(struct kvm *kvm,
                                       struct kvm_memory_slot *slot)
 {
@@ -726,28 +754,11 @@ static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
 {
 }
 
-static inline int kvm_iommu_map_guest(struct kvm *kvm)
-{
-        return -ENODEV;
-}
-
 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 {
         return 0;
 }
-
-static inline int kvm_assign_device(struct kvm *kvm,
-                struct kvm_assigned_dev_kernel *assigned_dev)
-{
-        return 0;
-}
-
-static inline int kvm_deassign_device(struct kvm *kvm,
-                struct kvm_assigned_dev_kernel *assigned_dev)
-{
-        return 0;
-}
-#endif /* CONFIG_IOMMU_API */
+#endif
 
 static inline void __guest_enter(void)
 {
@@ -921,7 +932,7 @@ static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
 }
 #endif
 
-#ifdef KVM_CAP_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 
 #define KVM_MAX_IRQ_ROUTES 1024
 
@@ -930,6 +941,9 @@ int kvm_set_irq_routing(struct kvm *kvm,
                         const struct kvm_irq_routing_entry *entries,
                         unsigned nr,
                         unsigned flags);
+int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
+                          struct kvm_kernel_irq_routing_entry *e,
+                          const struct kvm_irq_routing_entry *ue);
 void kvm_free_irq_routing(struct kvm *kvm);
 
 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
@@ -998,11 +1012,13 @@ static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
 
 #endif
 
-#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
+#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
 
 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
                                   unsigned long arg);
 
+void kvm_free_all_assigned_devices(struct kvm *kvm);
+
 #else
 
 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
@@ -1011,6 +1027,8 @@ static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
         return -ENOTTY;
 }
 
+static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
+
 #endif
 
 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
@@ -1028,6 +1046,46 @@ static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
         }
 }
 
+extern bool kvm_rebooting;
+
+struct kvm_device_ops;
+
+struct kvm_device {
+        struct kvm_device_ops *ops;
+        struct kvm *kvm;
+        void *private;
+        struct list_head vm_node;
+};
+
+/* create, destroy, and name are mandatory */
+struct kvm_device_ops {
+        const char *name;
+        int (*create)(struct kvm_device *dev, u32 type);
+
+        /*
+         * Destroy is responsible for freeing dev.
+         *
+         * Destroy may be called before or after destructors are called
+         * on emulated I/O regions, depending on whether a reference is
+         * held by a vcpu or other kvm component that gets destroyed
+         * after the emulated I/O.
+         */
+        void (*destroy)(struct kvm_device *dev);
+
+        int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
+        int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
+        int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
+        long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
+                      unsigned long arg);
+};
+
+void kvm_device_get(struct kvm_device *dev);
+void kvm_device_put(struct kvm_device *dev);
+struct kvm_device *kvm_device_from_filp(struct file *filp);
+
+extern struct kvm_device_ops kvm_mpic_ops;
+extern struct kvm_device_ops kvm_xics_ops;
+
 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 
 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)