linux-kernel - Re: x86/sgx: uapi change proposal

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Message-ID: <20181224120119.GE10971@linux.intel.com>
Date:   Mon, 24 Dec 2018 14:01:19 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Jethro Beekman <jethro@...tanix.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "x86@...nel.org" <x86@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Haitao Huang <haitao.huang@...ux.intel.com>,
        "Dr . Greg Wettstein" <greg@...ellic.com>
Subject: Re: x86/sgx: uapi change proposal

On Sun, Dec 23, 2018 at 12:41:49PM -0800, Andy Lutomirski wrote:
> Presumably sgx would create a bus and enumerate the devices as needed.
> Or I suppose these things could be platform or system devices. I’m not
> really a device model expert, and the one time I tried to implement a
> character device, I got so disgusted that I wrote a whole library for
> it.  It’s still in limbo somewhere.

In the driver/main.c I have a fairly good framework for device creation
so if there is any reason to add more devices it is dead easy. I just
don't see any reason for that. And I already have a bus there for SGX.
All of this has been done a long time ago.

/Jarkko