On Mon, Nov 05, 2018 at 10:39:46PM +0200, Andy Shevchenko wrote: > On Mon, Nov 5, 2018 at 7:30 PM Jarkko Sakkinen > <jarkko.sakkinen@xxxxxxxxxxxxxxx> wrote: > > > > On Sat, Nov 03, 2018 at 03:17:35PM +0200, Andy Shevchenko wrote: > > > On Sat, Nov 3, 2018 at 1:18 AM Jarkko Sakkinen > > > <jarkko.sakkinen@xxxxxxxxxxxxxxx> wrote: > > > > > > > > ENCLS is an umbrella instruction for a variety of cpl0 SGX functions. > > > > The ENCLS function that is executed is specified in EAX, with each > > > > function potentially having more leaf-specific operands beyond EAX. > > > > ENCLS introduces its own (positive value) error codes that (some) > > > > leafs use to return failure information in EAX. Leafs that return > > > > an error code also modify RFLAGS. And finally, ENCLS generates > > > > ENCLS-specific non-fatal #GPs and #PFs, i.e. a bug-free kernel may > > > > encounter faults on ENCLS that must be handled gracefully. > > > > > > > > Because of the complexity involved in encoding ENCLS and handling its > > > > assortment of failure paths, executing any given leaf is not a simple > > > > matter of emitting ENCLS. > > > > > > > > To enable adding support for ENCLS leafs with minimal fuss, add a > > > > two-layer macro system along with an encoding scheme to allow wrappers > > > > to return trap numbers along ENCLS-specific error codes. The bottom > > > > layer of the macro system splits between the leafs that return an > > > > error code and those that do not. The second layer generates the > > > > correct input/output annotations based on the number of operands for > > > > each leaf function. > > > > > > > +/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */ > > > > > > > +/** > > > > > > I dunno if kernel-doc script still complains about this. > > > > Is there a way to ask for make htmldocs to do only a subset of docs? > > Still kind of trying to figure out what would be a good flow for > > working with Sphinx. > > What I'm telling here is about Copyright notice, which in my > understanding is not a part of kernel-doc formatting. Though I might > be mistaken. > I remember some USB code has that and I saw a warning. > > -- > With Best Regards, > Andy Shevchenko I'll remove it because I don't find it in other headers under arch/x86. /Jarkko
