KVM: Expose a version 2 architectural PMU to a guests

[mirror_ubuntu-bionic-kernel.git] / include / linux / kvm_host.h

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index d5262319997806bb6f1fdfcfb50b6cef37428b0e..900c76337e8f387b1dcf183260e43c1625536500 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -14,6 +14,7 @@
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <linux/mmu_notifier.h>
 #include <linux/preempt.h>
 #include <linux/msi.h>
 #include <linux/slab.h>
@@ -50,6 +51,9 @@
 #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_USERSPACE_IRQ_SOURCE_ID    0
 
@@ -179,6 +183,7 @@ struct kvm_memory_slot {
        unsigned long *rmap;
        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];
        unsigned long userspace_addr;
        int user_alloc;
@@ -224,11 +229,20 @@ struct kvm_irq_routing_table {};
 
 #endif
 
+#ifndef KVM_MEM_SLOTS_NUM
+#define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
+#endif
+
+/*
+ * Note:
+ * memslots are not sorted by id anymore, please use id_to_memslot()
+ * to get the memslot by its id.
+ */
 struct kvm_memslots {
-       int nmemslots;
        u64 generation;
-       struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
-                                       KVM_PRIVATE_MEM_SLOTS];
+       struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
+       /* The mapping table from slot id to the index in memslots[]. */
+       int id_to_index[KVM_MEM_SLOTS_NUM];
 };
 
 struct kvm {
@@ -239,7 +253,6 @@ struct kvm {
        struct srcu_struct srcu;
 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
        u32 bsp_vcpu_id;
-       struct kvm_vcpu *bsp_vcpu;
 #endif
        struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
        atomic_t online_vcpus;
@@ -302,6 +315,11 @@ static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
             (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
             idx++)
 
+#define kvm_for_each_memslot(memslot, slots)   \
+       for (memslot = &slots->memslots[0];     \
+             memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
+               memslot++)
+
 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 
@@ -314,6 +332,7 @@ void kvm_exit(void);
 
 void kvm_get_kvm(struct kvm *kvm);
 void kvm_put_kvm(struct kvm *kvm);
+void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
 
 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 {
@@ -322,6 +341,18 @@ static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
                        || lockdep_is_held(&kvm->slots_lock));
 }
 
+static inline struct kvm_memory_slot *
+id_to_memslot(struct kvm_memslots *slots, int id)
+{
+       int index = slots->id_to_index[id];
+       struct kvm_memory_slot *slot;
+
+       slot = &slots->memslots[index];
+
+       WARN_ON(slot->id != id);
+       return slot;
+}
+
 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }