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

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Message-ID: <48296e78-5979-a22f-c337-633deccf30bf@intel.com>
Date:   Tue, 3 Jul 2018 12:03:48 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>, x86@...nel.org,
        platform-driver-x86@...r.kernel.org
Cc:     sean.j.christopherson@...el.com, nhorman@...hat.com,
        npmccallum@...hat.com, linux-sgx@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        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 07/03/2018 11:19 AM, Jarkko Sakkinen wrote:
> This commit adds a database of EPC banks for kernel to easily access the
> available EPC pages. On UMA architectures there is a singe bank of EPC
> pages. On NUMA architectures there is an EPC bank for each node.

Is this universally true?  What about Sub-NUMA-Clustering/Cluster-on-Die
systems?