Re: [PATCH v2 2/2] x86/sgx: Add sgx_nr_{all, free}_pages to the debugfs

[Borislav Petkov]

On Thu, Apr 08, 2021 at 11:52:40AM +0300, Jarkko Sakkinen wrote:
> I think these attributes are quite useful information to have available so
> I'd go actually doing sysfs attributes and create
> Documentation/ABI/stable/sysfs-driver-sgx to document them.

  testing/
        This directory documents interfaces that are felt to be stable,
        as the main development of this interface has been completed.

This sounds better for a start. From Documentation/ABI/README.

> Given that they would go then to the sysfs directory of the driver, then
> probably the legit names for the attributes ought to be:
> 
> - nr_all_epc_pages
> - nr_free_epc_pages
> 
> What do you think?

Sounds ok to me.

> PS. One useful case that I forgot to mention is that I use these to give
> idea what I gave EPC size in the BIOS. Now my EPC is set to 32 MB, and
> these report 20 MB of EPC pages. It's because other metadata (e.g. EPCM
> containing page attributes) is also stored in this area.

Just remember to put yourself in the user's shoes and think whether they
make sense to her/him.

Thx.

-- 
Regards/Gruss,
    Boris.

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