linux-kernel - Re: [PATCH V8 02/44] Documentation/protection-keys: Clean up documentation for User Space pkeys

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Message-ID: <6d6866d3-fd1b-c232-0e4f-72dd9845026b@intel.com>
Date:   Fri, 28 Jan 2022 14:39:10 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     ira.weiny@...el.com, Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dan Williams <dan.j.williams@...el.com>
Cc:     Fenghua Yu <fenghua.yu@...el.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V8 02/44] Documentation/protection-keys: Clean up
 documentation for User Space pkeys

On 1/27/22 09:54, ira.weiny@...el.com wrote:
> +PKeys Userspace (PKU) is a feature which is found on Intel's Skylake "Scalable
> +Processor" Server CPUs and later.  And it will be available in future
> +non-server Intel parts and future AMD processors.

The non-server parts are quite available these days.  I'm typing on one
right now:

	model name	: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz

This can probably say:

Protection Keys for Userspace (PKU) can be found on:
 * Intel server CPUs, Skylake and later
 * Intel client CPUs, Tiger Lake (11th Gen Core) and later
 * Future AMD CPUs

It would be great if the AMD folks can elaborate on that a bit, but I
understand it might not be possible if the CPUs aren't out yet.