Re: [PATCH v2 0/3] x86/sgx: eextend ioctl

[Jethro Beekman]

On 2021-04-12 17:36, Dave Hansen wrote:
> On 4/12/21 1:59 AM, Raoul Strackx wrote:
>> This patch set adds a new ioctl to enable userspace to execute EEXTEND
>> leaf functions per 256 bytes of enclave memory. With this patch in place,
>> Linux will be able to build all valid SGXv1 enclaves.
> 
> This didn't cover why we need a *NEW* ABI for this instead of relaxing
> the page alignment rules in the existing one.
> 

In executing the ECREATE, EADD, EEXTEND, EINIT sequence, you currently have 2 options for EADD/EEXTEND using the SGX_IOC_ENCLAVE_ADD_PAGES ioctl:
- execute EADD on any address
- execute EADD on any address followed by 16× EEXTEND for that address span

Could you be more specific on how you're suggesting that the current ioctl is modified to in addition support the following?
- execute EEXTEND on any address

--
Jethro Beekman | Fortanix

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature