linux-kernel - Re: [PATCH v26 22/22] docs: x86/sgx: Document SGX micro architecture and kernel internals

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Date:   Fri, 21 Feb 2020 20:13:02 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-sgx@...r.kernel.org
Cc:     akpm@...ux-foundation.org, dave.hansen@...el.com,
        sean.j.christopherson@...el.com, nhorman@...hat.com,
        npmccallum@...hat.com, haitao.huang@...el.com,
        andriy.shevchenko@...ux.intel.com, tglx@...utronix.de,
        kai.svahn@...el.com, bp@...en8.de, josh@...htriplett.org,
        luto@...nel.org, kai.huang@...el.com, rientjes@...gle.com,
        cedric.xing@...el.com, puiterwijk@...hat.com,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH v26 22/22] docs: x86/sgx: Document SGX micro architecture
 and kernel internals

Hi Jarkko,

One minor fix below:


On 2/9/20 1:26 PM, Jarkko Sakkinen wrote:
> Document Intel SGX micro architecture and kernel internals. The motivation
> is to make the core ideas approachable by keeping a fairly high abstraction
> level. Fine-grained micro architecture details can be looked up from Intel
> SDM Volume 3D.
> 
> Cc: Andy Lutomirski <luto@...nel.org>
> Cc: linux-doc@...r.kernel.org
> Co-developed-by: Sean Christopherson <sean.j.christopherson@...el.com>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> ---
>  Documentation/x86/index.rst |   1 +
>  Documentation/x86/sgx.rst   | 182 ++++++++++++++++++++++++++++++++++++
>  2 files changed, 183 insertions(+)
>  create mode 100644 Documentation/x86/sgx.rst
> 
> diff --git a/Documentation/x86/sgx.rst b/Documentation/x86/sgx.rst
> new file mode 100644
> index 000000000000..ccffb45b4f4d
> --- /dev/null
> +++ b/Documentation/x86/sgx.rst
> @@ -0,0 +1,182 @@
> +.. SPDX-License-Identifier: GPL-2.0
> +
> +============
> +Architecture
> +============
> +
> +Introduction
> +============
> +
> +*Software Guard eXtensions (SGX)* is a set of instructions that enable ring-3
> +applications to set aside private regions of code and data. These regions are
> +called enclaves. An enclave can be entered to a fixed set of entry points. Only
> +a CPU running inside the enclave can access its code and data.
> +
> +SGX support can be determined by
> +
> +	``grep /proc/cpuinfo``

	grep sgx /proc/cpuinfo

> +
> +Enclave Page Cache
> +==================

...

and
Acked-by: Randy Dunlap <rdunlap@...radead.org>
-- 
~Randy