Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...

[karo-tx-linux.git] / include / linux / kvm_host.h

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ca1b153585d3e6e2196f5d5c147d965c6bd84f14..665a260c7e09948fa3b5e3516efca2890edef840 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -172,11 +172,6 @@ static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
  */
 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 
-struct kvm_lpage_info {
-       unsigned long rmap_pde;
-       int write_count;
-};
-
 struct kvm_memory_slot {
        gfn_t base_gfn;
        unsigned long npages;
@@ -185,7 +180,7 @@ struct kvm_memory_slot {
        unsigned long *dirty_bitmap;
        unsigned long *dirty_bitmap_head;
        unsigned long nr_dirty_pages;
-       struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
+       struct kvm_arch_memory_slot arch;
        unsigned long userspace_addr;
        int user_alloc;
        int id;
@@ -377,6 +372,9 @@ int kvm_set_memory_region(struct kvm *kvm,
 int __kvm_set_memory_region(struct kvm *kvm,
                            struct kvm_userspace_memory_region *mem,
                            int user_alloc);
+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,
@@ -386,6 +384,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
                                struct kvm_userspace_memory_region *mem,
                                struct kvm_memory_slot old,
                                int user_alloc);
+bool kvm_largepages_enabled(void);
 void kvm_disable_largepages(void);
 void kvm_arch_flush_shadow(struct kvm *kvm);
 
@@ -451,6 +450,7 @@ long kvm_arch_dev_ioctl(struct file *filp,
                        unsigned int ioctl, unsigned long arg);
 long kvm_arch_vcpu_ioctl(struct file *filp,
                         unsigned int ioctl, unsigned long arg);
+int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
 
 int kvm_dev_ioctl_check_extension(long ext);
 
@@ -521,7 +521,7 @@ static inline void kvm_arch_free_vm(struct kvm *kvm)
 }
 #endif
 
-int kvm_arch_init_vm(struct kvm *kvm);
+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);
@@ -547,6 +547,7 @@ struct kvm_assigned_dev_kernel {
        unsigned int entries_nr;
        int host_irq;
        bool host_irq_disabled;
+       bool pci_2_3;
        struct msix_entry *host_msix_entries;
        int guest_irq;
        struct msix_entry *guest_msix_entries;
@@ -556,6 +557,7 @@ struct kvm_assigned_dev_kernel {
        struct pci_dev *dev;
        struct kvm *kvm;
        spinlock_t intx_lock;
+       spinlock_t intx_mask_lock;
        char irq_name[32];
        struct pci_saved_state *pci_saved_state;
 };
@@ -651,11 +653,43 @@ static inline void kvm_guest_exit(void)
        current->flags &= ~PF_VCPU;
 }
 
+/*
+ * search_memslots() and __gfn_to_memslot() are here because they are
+ * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
+ * gfn_to_memslot() itself isn't here as an inline because that would
+ * bloat other code too much.
+ */
+static inline struct kvm_memory_slot *
+search_memslots(struct kvm_memslots *slots, gfn_t gfn)
+{
+       struct kvm_memory_slot *memslot;
+
+       kvm_for_each_memslot(memslot, slots)
+               if (gfn >= memslot->base_gfn &&
+                     gfn < memslot->base_gfn + memslot->npages)
+                       return memslot;
+
+       return NULL;
+}
+
+static inline struct kvm_memory_slot *
+__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
+{
+       return search_memslots(slots, gfn);
+}
+
 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 {
        return gfn_to_memslot(kvm, gfn)->id;
 }
 
+static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
+{
+       /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
+       return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
+               (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
+}
+
 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
                                               gfn_t gfn)
 {
@@ -702,12 +736,16 @@ static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_se
        if (unlikely(vcpu->kvm->mmu_notifier_count))
                return 1;
        /*
-        * Both reads happen under the mmu_lock and both values are
-        * modified under mmu_lock, so there's no need of smb_rmb()
-        * here in between, otherwise mmu_notifier_count should be
-        * read before mmu_notifier_seq, see
-        * mmu_notifier_invalidate_range_end write side.
+        * Ensure the read of mmu_notifier_count happens before the read
+        * of mmu_notifier_seq.  This interacts with the smp_wmb() in
+        * mmu_notifier_invalidate_range_end to make sure that the caller
+        * either sees the old (non-zero) value of mmu_notifier_count or
+        * the new (incremented) value of mmu_notifier_seq.
+        * PowerPC Book3s HV KVM calls this under a per-page lock
+        * rather than under kvm->mmu_lock, for scalability, so
+        * can't rely on kvm->mmu_lock to keep things ordered.
         */
+       smp_rmb();
        if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
                return 1;
        return 0;
@@ -770,6 +808,13 @@ static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 {
        return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 }
+
+bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
+
+#else
+
+static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
+
 #endif
 
 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT