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Date:   Tue, 10 May 2022 20:15:45 -0700
From:   Kees Cook <keescook@chromium.org>
To:     "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
Cc:     "Weiny, Ira" <ira.weiny@intel.com>,
        "hpa@zytor.com" <hpa@zytor.com>,
        "Williams, Dan J" <dan.j.williams@intel.com>,
        "Shankar, Ravi V" <ravi.v.shankar@intel.com>,
        "Yu, Fenghua" <fenghua.yu@intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
        "linux-hardening@vger.kernel.org" <linux-hardening@vger.kernel.org>
Subject: Re: [PATCH V10 14/44] mm/pkeys: Introduce pks_set_readwrite()
Message-ID: <202205102008.88C15972@keescook>
References: <20220419170649.1022246-1-ira.weiny@intel.com>
 <20220419170649.1022246-15-ira.weiny@intel.com>
 <202205091304.434A9B45@keescook>
 <YnraD8URWxWtaltF@iweiny-desk3>
 <202205101504.5B5C693F7C@keescook>
 <76ee55622592d531c82cb42b96d4bb27deb26287.camel@intel.com>
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On Tue, May 10, 2022 at 10:26:43PM +0000, Edgecombe, Rick P wrote:
> v2: 
> https://lore.kernel.org/lkml/20210830235927.6443-1-rick.p.edgecombe@intel.com/#r
> 
> Mostly it fit together pretty easily, but there was memory overhead
> required to protect the page tables that map the direct map fully
> (unless a better solution can be found).

Oh my, I totally missed this. Yay for Too Much Email Every Day. ;)

I'll give this a read; thanks for working on it!

Also, can you speak to the schedule of availability for PKS?

-- 
Kees Cook