From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C008C24466C; Wed, 8 Apr 2026 07:05:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775631936; cv=none; b=nkiTjN5YMpd4tt+/5FDdIz/pLqfyi6OTsJ8GgsciwHIC3Mv8a/4UZvxIRMkxkVk1cbRfF1T+Lykv+HmwuzY2YHnCp4P3QeexMB+NLoDAaKpgVGRUYXoNfGI/Js0KMZllIOyFE/6JTcnbTaUQhR9/v+nvy8L91WAbMNrmisAAOKM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775631936; c=relaxed/simple; bh=M8XYGEoCkMLxD3pn8ODjvHiw55anXKWJ1M6byHgjkgA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ayKf4tznqunZpQvSvdtlW7TgFPBwTy1Kx+lDRMNJP0OMk47Uz3yV0W5dydhXySWw+pf85PIaMCwwfF8W2Uu/3u1Hb//QHycQAI8W8vZc39PruKm6JLpUNh1IlFlruCENz8A+fvNrrxD8X+QHOjBgocidY4MXdeL7nIYXC8vB3AE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LH0ocdHc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LH0ocdHc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC029C19424; Wed, 8 Apr 2026 07:05:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775631936; bh=M8XYGEoCkMLxD3pn8ODjvHiw55anXKWJ1M6byHgjkgA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; 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 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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