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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775633987; bh=JKML08yy0dGpuo28t9vqJg2KAb5rilg3WmynEttBawc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=rOqNUi4dltOXzra1+FgfFkNRd/5pwIsWuJGItMQC259wbE+864o+qSF1LRL5816dM ikBXsGUsokZQLJ6E7R9Y3GsvJzSVmhs9aTNrofH2ZKJlNJXTIu1h95jmSClldMUlir RD6LQLMbiqCCmvXbAo/weSbFXEmgbtiQFqc21/l7MyZm/tp7U55aRx/LOeb00iLMGm dsCttTgICrEcjgmdYn4/P8tr/nQ9CIKcxHRSlvjRHQLs+3aLAUx8Vvz0DRk4KmM9kz fKrho3gfOlCpe4TJogEakgWq3+N2z4raLU7ZKv+Q2nEn1w2SCulHd8bqY0pUV0XK46 RjuI3vNqWoSdA== Message-ID: Date: Wed, 8 Apr 2026 09:39:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] docs: proc: document ProtectionKey in smaps To: Kevin Brodsky , Randy Dunlap , 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> <8a5e4afd-cd0a-400a-8624-79c1dc9e3ff3@kernel.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-Stat-Signature: su3wgimfwjb5i6dpfna4dtstkyb1r47z X-Rspamd-Queue-Id: 73402180009 X-Rspam-User: X-Rspamd-Server: rspam03 X-HE-Tag: 1775633988-627410 X-HE-Meta: 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 AeYq6nu3 vtjA9/FB8Q5f2oa2JXl+JwVGtMbZzw62nmslWqWEFO2Y23tjWc2Z9AJGGSeI+zHIRRV5g05U58zTqzVSoXVWPky9zQGYvCQwq4CxMF85Aux93nACDHJ3A36Ty73wQYklKFDjdo9UcsAs9euH3v6KSq5CgCaWYUFOsSPA0tDHxFfKmGCFNXnenI02wH3TrVYLCi0alOXkZvZw1fyTlpU7sOddTN7fKgszxTxsUoZKbbFJ405QS/SL+DLisG3IzR4khB0FJwADHg90mrUknTP81UAQS9NLftaHQD8C1 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/8/26 09:15, Kevin Brodsky wrote: > On 08/04/2026 09:05, David Hildenbrand (Arm) wrote: >>> 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 ... ? > > Of course that's also possible, "hardware" has to be interpreted in the > context of virtualisation... But granted it is possible to hide features > even on the host with the right kernel parameter, on arm64 at least. > > "If the kernel supports protection keys (pkeys) and the hardware feature > is detected"? Still vague but a little more accurate. Can we just talk about CPU support, to avoid using "system" or "hardware" ? -- Cheers, David