linux-kernel - Re: [PATCH v12 07/13] x86/sgx: data structures for tracking available EPC pages

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Message-ID: <20180704173612.GK6724@linux.intel.com>
Date:   Wed, 4 Jul 2018 20:36:12 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        platform-driver-x86@...r.kernel.org, dave.hansen@...el.com,
        sean.j.christopherson@...el.com, nhorman@...hat.com,
        npmccallum@...hat.com, linux-sgx@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v12 07/13] x86/sgx: data structures for tracking
 available EPC pages

On Tue, Jul 03, 2018 at 01:26:11PM -0700, Randy Dunlap wrote:
> On 07/03/18 12:46, Thomas Gleixner wrote:
> > On Tue, 3 Jul 2018, Jarkko Sakkinen wrote:
> > 
> >> SGX has a set of data structures to maintain information about the enclaves
> >> and their security properties. BIOS reserves a fixed size region of
> >> physical memory for these structures by setting Processor Reserved Memory
> >> Range Registers (PRMRR). This memory area is called Enclave Page Cache
> >> (EPC).
> >>
> >> This commit adds a database of EPC banks for kernel to easily access the
> 
> what kind of database?  How does one query it?

Have to think of a better word. Thanks!

/Jarkko