Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Mon, 24 Dec 2018 14:01:19 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To:     Andy Lutomirski <luto@kernel.org>
Cc:     Sean Christopherson <sean.j.christopherson@intel.com>,
        Jethro Beekman <jethro@fortanix.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "x86@kernel.org" <x86@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
        Josh Triplett <josh@joshtriplett.org>,
        Haitao Huang <haitao.huang@linux.intel.com>,
        "Dr . Greg Wettstein" <greg@enjellic.com>
Subject: Re: x86/sgx: uapi change proposal
Message-ID: <20181224120119.GE10971@linux.intel.com>
References: <7706b2aa71312e1f0009958bcab24e1e9d8d1237.camel@linux.intel.com>
 <598cd050-f0b5-d18c-96a0-915f02525e3e@fortanix.com>
 <20181219091148.GA5121@linux.intel.com>
 <613c6814-4e71-38e5-444a-545f0e286df8@fortanix.com>
 <20181219144515.GA30909@linux.intel.com>
 <CALCETrW_8LnitFamYUU7POHFOJFxLO7ESFUdS=aeG_SOvHVPkw@mail.gmail.com>
 <20181221162825.GB26865@linux.intel.com>
 <CALCETrX+KisMCbptrnPSO79-YF4E3nR1XHt+a7hCs1GXsxAbtw@mail.gmail.com>
 <20181221182454.GA27371@linux.intel.com>
 <CALCETrVYJmutVEemMZRc=neFT4Ph+JUgapTWy5JS6KTH9eamHA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <CALCETrVYJmutVEemMZRc=neFT4Ph+JUgapTWy5JS6KTH9eamHA@mail.gmail.com>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
User-Agent: Mutt/1.10.1 (2018-07-13)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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