Re: [PATCH v1 01/15] nitro_enclaves: Add ioctl interface definition

[Paolo Bonzini]

On 21/04/20 20:47, Randy Dunlap wrote:
>> +
>> +/**
>> + * The command is used to trigger enclave start after the enclave resources,
>> + * such as memory and CPU, have been set.
>> + *
>> + * The enclave start metadata is an in / out data structure. It includes
>> + * provided info by the caller - enclave cid and flags - and returns the
>> + * slot uid and the cid (if input cid is 0).
>> + */
>> +#define NE_ENCLAVE_START _IOWR('B', 0x1, struct enclave_start_metadata)
> Please document ioctl major ('B' in this case) and range used in
> Documentation/userspace-api/ioctl/ioctl-number.rst.
> 

Since it's really just a couple ioctls, I can "donate" part of the KVM
space, for example major 0xAE minor 0x20-0x3f.

Paolo