Add the KVM capability KVM_CAP_GUEST_MEMFD_MAPPABLE, which is
true if mapping guest memory is supported by the host.
Signed-off-by: Fuad Tabba <tabba@xxxxxxxxxx>
---
include/uapi/linux/kvm.h | 3 ++-
virt/kvm/kvm_main.c | 4 ++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index d03842abae57..783d0c3f4cb1 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -916,7 +916,8 @@ struct kvm_enable_cap {
#define KVM_CAP_MEMORY_FAULT_INFO 232
#define KVM_CAP_MEMORY_ATTRIBUTES 233
#define KVM_CAP_GUEST_MEMFD 234
-#define KVM_CAP_VM_TYPES 235
+#define KVM_CAP_GUEST_MEMFD_MAPPABLE 235
+#define KVM_CAP_VM_TYPES 236
struct kvm_irq_routing_irqchip {
__u32 irqchip;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index ec6255c7325e..485c39fc373c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5077,6 +5077,10 @@ static int kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
#ifdef CONFIG_KVM_PRIVATE_MEM
case KVM_CAP_GUEST_MEMFD:
return !kvm || kvm_arch_has_private_mem(kvm);
+#endif
+#ifdef CONFIG_KVM_PRIVATE_MEM_MAPPABLE
+ case KVM_CAP_GUEST_MEMFD_MAPPABLE:
+ return !kvm || kvm_arch_has_private_mem(kvm);
#endif
default:
break;
--
2.46.0.rc1.232.g9752f9e123-goog
