linux-kernel - Re: [PATCH v13 2/2] x86/sgx: Add an attribute for the amount of SGX memory in a NUMA node

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Message-ID: <2da95214-8b1c-46e7-f6d1-a35ef2697c26@intel.com>
Date:   Tue, 4 Jan 2022 08:52:07 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Jarkko Sakkinen <jarkko@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>, reinette.chatre@...el.com,
        linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org
Subject: Re: [PATCH v13 2/2] x86/sgx: Add an attribute for the amount of SGX
 memory in a NUMA node

On 1/1/22 8:54 PM, Dave Hansen wrote:
> On 12/28/21 3:45 PM, Jarkko Sakkinen wrote:
>>> If I can provide any further information or testing, let me know!
>> Dave, when is the fix going to be applied [*]?
>>
>>> Cheers,
>>> Nathan
>> [*] https://lore.kernel.org/linux-sgx/YcGTePmWDMOQU1pn@iki.fi/T/#m831a01bdde347f9e0af2c973986fae0499718201
> Greg preferred hiding the file as opposed to faking a number in there.
> Any testing of the attached would be appreciated.

Well, that didn't work on real SGX hardware.  The sysfs node code calls
the ->is_visible() callback before SGX is initialized.

I'll send out and updated version shortly that uses sysfs_update_group()
instead.