From: Ștefan Șicleru <[email protected]> This function is needed for the KVMI_VM_GET_MAX_GFN command.
Signed-off-by: Ștefan Șicleru <[email protected]> Signed-off-by: Adalbert Lazăr <[email protected]> --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 6890f0a85dba..6680592f2de1 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -765,6 +765,7 @@ struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn); void mark_page_dirty(struct kvm *kvm, gfn_t gfn); +gfn_t kvm_get_max_gfn(struct kvm *kvm); struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu); struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4c69ce5aa79c..a6eb3f8ea62f 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1175,6 +1175,29 @@ static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, return kvm_set_memory_region(kvm, mem); } +gfn_t kvm_get_max_gfn(struct kvm *kvm) +{ + struct kvm_memory_slot *memslot; + struct kvm_memslots *slots; + gfn_t max_gfn = 0; + int i, idx; + + idx = srcu_read_lock(&kvm->srcu); + spin_lock(&kvm->mmu_lock); + + for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { + slots = __kvm_memslots(kvm, i); + kvm_for_each_memslot(memslot, slots) + max_gfn = max(max_gfn, memslot->base_gfn + + memslot->npages); + } + + spin_unlock(&kvm->mmu_lock); + srcu_read_unlock(&kvm->srcu, idx); + + return max_gfn; +} + int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log, int *is_dirty) { _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
