Re: [PATCH v17 07/23] x86/mm: x86/sgx: Add new 'PF_SGX' page fault error code bit

[Dave Hansen]

On 11/15/18 5:01 PM, Jarkko Sakkinen wrote:
> The SGX bit is set in the #PF error code if and only if the fault is
> detected by the Enclave Page Cache Map (EPCM), a hardware-managed
> table that enforces the paging permissions defined by the enclave,
> e.g. to prevent the kernel from changing the permissions of an
> enclave's page(s).

This should probably also mention that, despite being a page fault,
X86_PF_SGX has nothing to do with paging itself.