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

[Jarkko Sakkinen]

On Fri, Nov 16, 2018 at 03:33:35PM -0800, Dave Hansen wrote:
> 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.

A valid point.

/Jarkko