The KVM_MEMORY_ENCRYPT_OP ioctl
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-The main ioctl to access SEV is KVM_MEMORY_ENCRYPT_OP. If the argument
-to KVM_MEMORY_ENCRYPT_OP is NULL, the ioctl returns 0 if SEV is enabled
-and ``ENOTTY`` if it is disabled (on some older versions of Linux,
-the ioctl runs normally even with a NULL argument, and therefore will
-likely return ``EFAULT``). If non-NULL, the argument to KVM_MEMORY_ENCRYPT_OP
-must be a struct kvm_sev_cmd::
+The main ioctl to access SEV is KVM_MEMORY_ENCRYPT_OP, which operates on
+the VM file descriptor. If the argument to KVM_MEMORY_ENCRYPT_OP is NULL,
+the ioctl returns 0 if SEV is enabled and ``ENOTTY`` if it is disabled
+(on some older versions of Linux, the ioctl tries to run normally even
+with a NULL argument, and therefore will likely return ``EFAULT`` instead
+of zero if SEV is enabled). If non-NULL, the argument to
+KVM_MEMORY_ENCRYPT_OP must be a struct kvm_sev_cmd::
struct kvm_sev_cmd {
__u32 id;