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b=LH0ocdHcmH4RV1KL1PiXHkOvlvoCRIJqQVMTRzQlvuhEbtW0bgfkjAxMxB7Zrkyxu f5CMhbvDJERT6DOxCYAX+F5/J/4d29Jm0IPcfXoZhKjdXxNYcv/GR8CnfLtEM0zhBz i5qLy2oj39iFwqGjIDohH6FI/F+0t75CLX4LyR3KnLEdFgXATv3Trm5GuELGoILTrZ jc/eAxqVi/lOkrzhFQxbcsB8N6L9SloJtgMbupgUv82uIYu41BpT9Jx78ChAMN8cM+ Gdk4gGTbYxd2vsqwuZNvfjUzmaTKwGXEfDZhpCzCgesoeN0PFvfV7voxwslSv3yN/P rkZW+WZ9BYFyQ== Message-ID: <8a5e4afd-cd0a-400a-8624-79c1dc9e3ff3@kernel.org> Date: Wed, 8 Apr 2026 09:05:32 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] docs: proc: document ProtectionKey in smaps To: Randy Dunlap , Kevin Brodsky , Dave Hansen , linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Yury Khrustalev , Jonathan Corbet , Shuah Khan , Dave Hansen , Andrew Morton , Lorenzo Stoakes , Vlastimil Babka , Mark Rutland , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org References: <20260407125133.564182-1-kevin.brodsky@arm.com> <98880cc2-09be-4bd8-b8f4-f0f0845f939e@intel.com> <2d2aac86-2780-4a29-9eef-116c26485812@arm.com> <18e2042c-d414-40fb-8819-5e930d5b1584@infradead.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 51737C0008 X-Stat-Signature: spzjs5wwjra19nfaajjc4zotz1pyj5x1 X-Rspamd-Server: rspam06 X-HE-Tag: 1775631937-553442 X-HE-Meta: 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 08cp2FZj R08ErsTRkYmMp9r1hjUDOSeAHLXxMaHXEukHp4oBPDIWx6RoNs6S706bCWJKJ73hjvmgN2zJ6TFtEDC7UBsMCrCzBfaCi1PfmqruyKK/eTS6ws9Y4m5E0hvNAhkrF6xEFYMiHUygbzAtFzahcVvemIro1x1uskbrKw+pO1dpuL4ioaD8d+yj1VmEKKq1OIkFnhzpMmHMGMyCyn6AIVPu6tR1Z9m3Q1HJX1/mvXg7g5vU0T9deq5JhavvTZnlBtvdvHVHu Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/7/26 20:58, Randy Dunlap wrote: > > > On 4/7/26 8:12 AM, Kevin Brodsky wrote: >> On 07/04/2026 16:42, Dave Hansen wrote: >>> I think you're trying to get across the point here that the kernel needs >>> to know about protection keys, have it enabled, and be running on a CPU >>> with pkey support. >> >> Indeed. >> >>> To me "system" is a bit ambiguous here but _can_ refer to the whole >>> hardware/software system as a whole. To avoid redundancy, I'd say either: >>> >>> If both the kernel and the processor support protection keys... >>> >>> or >>> >>> If the system supports protection keys... >> >> I see your point. By "system" I essentially mean the hardware (the SoC). >> In general I would tend to avoid "processor" because not all CPUs in a >> system necessarily have the same features, and some features require >> hardware support beyond the CPU itself. Terminology is hard... >> >> Happy to replace "system" with "hardware" if that's clearer :) > > I think that "system" is too nebulous there, so I would prefer to see > "hardware" instead. What if you're running in a VM where the feature is hidden ... ? -- Cheers, David