linux-kernel - Re: [PATCH v14 12/19] x86/sgx: Add data structures for tracking the EPC pages

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Message-ID: <20180927131114.GA5436@linux.intel.com>
Date:   Thu, 27 Sep 2018 16:11:14 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        dave.hansen@...el.com, sean.j.christopherson@...el.com,
        nhorman@...hat.com, npmccallum@...hat.com, serge.ayoun@...el.com,
        shay.katz-zamir@...el.com, linux-sgx@...r.kernel.org,
        andriy.shevchenko@...ux.intel.com,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Suresh Siddha <suresh.b.siddha@...el.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v14 12/19] x86/sgx: Add data structures for tracking the
 EPC pages

On Tue, Sep 25, 2018 at 01:00:42PM -0700, Randy Dunlap wrote:
> On 9/25/18 6:06 AM, Jarkko Sakkinen wrote:
> > Add data structures to track Enclave Page Cache (EPC) pages.  EPC is
> > divided into multiple banks (1-N) of which addresses and sizes can be
> > enumerated with CPUID by the OS.
> > 
> > On NUMA systems a node can have at most bank. A bank can be at most part of
> > two nodes. SGX supports both nodes with a single memory controller and also
> > sub-cluster nodes with severals memory controllers on a single die.
> > 
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> > Co-developed-by: Serge Ayoun <serge.ayoun@...el.com>
> > Co-developed-by: Sean Christopherson <sean.j.christopherson@...el.com>
> > Signed-off-by: Serge Ayoun <serge.ayoun@...el.com>
> > Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> > ---
> >  arch/x86/include/asm/sgx.h      |  55 +++++++++++++++
> >  arch/x86/kernel/cpu/intel_sgx.c | 115 ++++++++++++++++++++++++++++++++
> >  2 files changed, 170 insertions(+)
> 
> Hi,
> 
> Several comment blocks begin with "/**" but they are either not intended
> to be kernel-doc notation or they are incomplete kernel-doc notation.

I'll enumerate them through.

Thank you for the feedback.

/Jarkko