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 | 24 ++++++++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 92490279d65a..a4249fc88fc2 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -776,6 +776,7 @@ 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 4d965913d347..8c4bccf33c8c 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1347,6 +1347,30 @@ 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) +{ + u32 skip_mask = KVM_MEM_READONLY | KVM_MEMSLOT_INVALID; + struct kvm_memory_slot *memslot; + struct kvm_memslots *slots; + gfn_t max_gfn = 0; + int idx; + + idx = srcu_read_lock(&kvm->srcu); + spin_lock(&kvm->mmu_lock); + + slots = kvm_memslots(kvm); + kvm_for_each_memslot(memslot, slots) + if (memslot->id < KVM_USER_MEM_SLOTS && + (memslot->flags & skip_mask) == 0) + max_gfn = max(max_gfn, memslot->base_gfn + + memslot->npages); + + spin_unlock(&kvm->mmu_lock); + srcu_read_unlock(&kvm->srcu, idx); + + return max_gfn; +} + #ifndef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT /** * kvm_get_dirty_log - get a snapshot of dirty pages _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
