linux-kernel - Re: [PATCH v16 18/22] platform/x86: Intel SGX driver

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Message-ID: <20181121114650.GA1638@linux.intel.com>
Date:   Wed, 21 Nov 2018 13:46:50 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        linux-sgx@...r.kernel.org, dave.hansen@...el.com,
        nhorman@...hat.com, npmccallum@...hat.com, serge.ayoun@...el.com,
        shay.katz-zamir@...el.com, haitao.huang@...el.com,
        andriy.shevchenko@...ux.intel.com, tglx@...utronix.de,
        kai.svahn@...el.com, 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 v16 18/22] platform/x86: Intel SGX driver

On Thu, Nov 15, 2018 at 10:16:25PM +0200, Jarkko Sakkinen wrote:
> This is how strongly think. I can go with VMAs for swapping *but* if
> that is the route I would recommend using vm_mmap() instead of taking
> pointer from user space. This way the way swapping is done can be always
> changed. It will be a huge lock-in to do it otherwise.

I digged out my old code and it should be easy to replace. Most of the
issues were related to exit_mm(), which have been anyway sorted in the
code base.

I'll do it for v18.

/Jarkko