KVM: use correct accessor function for __kvm_memslots

[linux-block.git] / include / linux / kvm_host.h

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 8c0664309815ff95b0308b379e863125866f31f6..648b34cabb38214e6bb957aeecbcf61e03a26d4c 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -126,6 +126,13 @@ static inline bool is_error_page(struct page *page)
 #define KVM_REQ_MMU_RELOAD        (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
 #define KVM_REQ_PENDING_TIMER     2
 #define KVM_REQ_UNHALT            3
+#define KVM_REQUEST_ARCH_BASE     8
+
+#define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
+       BUILD_BUG_ON((unsigned)(nr) >= 32 - KVM_REQUEST_ARCH_BASE); \
+       (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
+})
+#define KVM_ARCH_REQ(nr)           KVM_ARCH_REQ_FLAGS(nr, 0)
 
 #define KVM_USERSPACE_IRQ_SOURCE_ID            0
 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID       1
@@ -227,7 +234,7 @@ struct kvm_vcpu {
 
        int guest_fpu_loaded, guest_xcr0_loaded;
        struct swait_queue_head wq;
-       struct pid *pid;
+       struct pid __rcu *pid;
        int sigset_active;
        sigset_t sigset;
        struct kvm_vcpu_stat stat;
@@ -383,7 +390,7 @@ struct kvm {
        spinlock_t mmu_lock;
        struct mutex slots_lock;
        struct mm_struct *mm; /* userspace tied to this vm */
-       struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
+       struct kvm_memslots __rcu *memslots[KVM_ADDRESS_SPACE_NUM];
        struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 
        /*
@@ -397,7 +404,7 @@ struct kvm {
        int last_boosted_vcpu;
        struct list_head vm_list;
        struct mutex lock;
-       struct kvm_io_bus *buses[KVM_NR_BUSES];
+       struct kvm_io_bus __rcu *buses[KVM_NR_BUSES];
 #ifdef CONFIG_HAVE_KVM_EVENTFD
        struct {
                spinlock_t        lock;
@@ -466,6 +473,12 @@ struct kvm {
 #define vcpu_err(vcpu, fmt, ...)                                       \
        kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
 
+static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
+{
+       return srcu_dereference_check(kvm->buses[idx], &kvm->srcu,
+                                     lockdep_is_held(&kvm->slots_lock));
+}
+
 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 {
        /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
@@ -555,9 +568,8 @@ void kvm_put_kvm(struct kvm *kvm);
 
 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
 {
-       return rcu_dereference_check(kvm->memslots[as_id],
-                       srcu_read_lock_held(&kvm->srcu)
-                       || lockdep_is_held(&kvm->slots_lock));
+       return srcu_dereference_check(kvm->memslots[as_id], &kvm->srcu,
+                       lockdep_is_held(&kvm->slots_lock));
 }
 
 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
@@ -1098,6 +1110,11 @@ static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
        set_bit(req & KVM_REQUEST_MASK, &vcpu->requests);
 }
 
+static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
+{
+       return READ_ONCE(vcpu->requests);
+}
+
 static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
 {
        return test_bit(req & KVM_REQUEST_MASK, &vcpu->requests);