linux-kernel - Re: [PATCH v17 18/23] platform/x86: Intel SGX driver

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Message-ID: <20181119171934.GA16252@linux.intel.com>
Date:   Mon, 19 Nov 2018 19:19:34 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jethro Beekman <jethro@...tanix.com>
Cc:     "x86@...nel.org" <x86@...nel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
        "dave.hansen@...el.com" <dave.hansen@...el.com>,
        "sean.j.christopherson@...el.com" <sean.j.christopherson@...el.com>,
        "nhorman@...hat.com" <nhorman@...hat.com>,
        "npmccallum@...hat.com" <npmccallum@...hat.com>,
        "serge.ayoun@...el.com" <serge.ayoun@...el.com>,
        "shay.katz-zamir@...el.com" <shay.katz-zamir@...el.com>,
        "haitao.huang@...ux.intel.com" <haitao.huang@...ux.intel.com>,
        "andriy.shevchenko@...ux.intel.com" 
        <andriy.shevchenko@...ux.intel.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "kai.svahn@...el.com" <kai.svahn@...el.com>,
        "mark.shanahan@...el.com" <mark.shanahan@...el.com>,
        "luto@...capital.net" <luto@...capital.net>,
        Suresh Siddha <suresh.b.siddha@...el.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v17 18/23] platform/x86: Intel SGX driver

On Mon, Nov 19, 2018 at 04:22:54PM +0000, Jethro Beekman wrote:
> On 2018-11-19 20:36, Jarkko Sakkinen wrote:
> > Question: should be dissolve the driver completely and move this code to
> > arch/x86/kernel/cpu/sgx/ (and rename intel_sgx.c as main.c)? Swapping
> > patch removes the possibility to compile this as a module anyway.
> 
> No. We should keep the capability to build this as a module for other users
> of SGX. What is the swapping patch and why doesn't allow building as a
> module?

In some earlier version of the patch set the request was to remove the
callback interface to the driver so now core does direct calls to the
swapping operations.

/Jarkko