From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 390C2C53219 for ; Mon, 27 Jul 2026 10:16:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 147036B00A9; Mon, 27 Jul 2026 06:16:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0F86A6B00AB; Mon, 27 Jul 2026 06:16:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F28FB6B00AC; Mon, 27 Jul 2026 06:16:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id CBDE36B00A9 for ; Mon, 27 Jul 2026 06:16:18 -0400 (EDT) Received: from smtpin02.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 44CF31206AC for ; Mon, 27 Jul 2026 10:16:18 +0000 (UTC) X-FDA: 85034151636.02.9DCD0C5 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf04.hostedemail.com (Postfix) with ESMTP id A3B7D40002 for ; Mon, 27 Jul 2026 10:16:16 +0000 (UTC) Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=aeXLGKxn; spf=pass (imf04.hostedemail.com: domain of rppt@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1785147376; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=aPvuz+aL88c21S8YC4GLGVYZg37SgTBgz+cPgSwl5YY=; b=ltSS7qnjSS03SDh/+IrImpUEK5EjKLZPn6hMbTXApAm4RdAgUDx1rc1TbtEkuS3kmA3J4N Iwq+GHJgIOzs212ESJUx5HgoTfY0Y/cEEKGl78WjCb3sGsVcJl39rPlpqwYft0Hv3ouAwB eI9cUSLcR8WWUlyrcWI41COWKyQF1YY= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=aeXLGKxn; spf=pass (imf04.hostedemail.com: domain of rppt@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785147376; b=5ZPvShrzNjj5Jw4/L0XhU4rHMmi1XCMCCJtEZYPwtONzpXcOhb0563P04nJXGGtXyye8MV Lb8cUyYxv4yyWaA5lbKMKi0e+tDr1VkGjyWOeK+lnEPrQbKiOAh8vBiFkAUUBPuCd2zRKk 4mb4UBKksWMZSk4mudDS+JE8C30tYsE= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 2746F601ED; Mon, 27 Jul 2026 10:16:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE0021F000E9; Mon, 27 Jul 2026 10:16:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785147375; bh=aPvuz+aL88c21S8YC4GLGVYZg37SgTBgz+cPgSwl5YY=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=aeXLGKxn+RhuEpjDFbt/ECV2BxYK5diVi7xVn6tULU7vDF7IK7Nil1nVqd/uTLs0a j54JY+fifjoQHmXB9CR+jCM4rvP6pUcAJpAIgW91yTz1VWA8cFXD1DZoURmpEUqlBo Tq8KvwKyQ4fOEXf51Jdb/5lt35sWrjNBv7X3ON5nEjg++ndjFL8fdwh7RQt7DAiufK NEu++wGQ+modaUWU4wmPBGb6eEqXBiiWFcOGq4t079CkA4z0301GVt3RVtw+hHhHy4 jlT37q6tmmybvVR0a4m6cIFpSFH0potJvfTJYgzoIW0uyrUmfcVfT1diLwjHu9fMt5 gbvr2kjjgFHYQ== Date: Mon, 27 Jul 2026 13:16:01 +0300 From: Mike Rapoport To: Adrian =?utf-8?Q?Barna=C5=9B?= Cc: linux-mm@kvack.org, Albert Ou , Andrew Morton , Andy Lutomirski , Borislav Petkov , Brendan Jackman , Catalin Marinas , Dave Hansen , David Hildenbrand , Huacai Chen , Ingo Molnar , Ingo Molnar , Kevin Brodsky , "Liam R. Howlett" , Lorenzo Stoakes , Michal Hocko , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , "H. Peter Anvin" , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, loongarch@lists.linux.dev, x86@kernel.org, Dave Hansen , Juergen Gross Subject: Re: [PATCH RFC 00/18] arch, mm: create a generic set_memory/change_page_attr core Message-ID: References: <20260721-generic-set-memory-v0-1-v1-0-2c1fc62306b3@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: A3B7D40002 X-Stat-Signature: onoyikhgdochngkhsjz9zwtkhhddbhbn X-HE-Tag: 1785147376-768706 X-HE-Meta: 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 KtSDFe4r Y24mPnnIdLTlkflIQ8WH7x6358B1ITYVbli4V4LbTkfd+GwJPcwWcZbVOAIYmyt5NAnXlENtL+Z/qFOo6VXFO5s9yo20LTpEtT5bP7l8NrpTC5fLfymX4Lbq5xb7O0qEsjq+SbuI74BBw7SwB5A4JfeHJm7bZ7G+0wH/WLzzaRZoxShtfesmhQj7tGfLn7m6Z9UHXMb2FkTcw+Tl2ENse+ic3Om/Ln28rjy3nF98V1QoubQ7kv9iAfSBPhYMaXm8oayJx5QsN9a3eJhJkAmC/g8GlEvuN0oqFsbtZqGJI2NrKadPu56uL97QcDeNS8sTRfPP0rvjqvM8foAw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Adrian, On Wed, Jul 22, 2026 at 03:17:19PM +0000, Adrian Barnaś wrote: > On Tue, Jul 21, 2026 at 07:23:23PM +0300, Mike Rapoport (Microsoft) wrote: > > Hi Mike, > > > Once this settles, the next step I'm planning is to convert arm64. This > > would be much more involved than loongarch and riscv together, so I > > didn't even aspire to include arm64 in the first RFC. That said, I have > > a very ugly arm64 prototype that rewrites arch/arm64/pageattr.c to use > > the generic CPA infrastructure and replaces the existing implementation > > of page table splits for systems that support bbml2. But there's a lot > > of yak shaving there to get from a PoC to actual patches. > > Could you share your PoC for ARM64. I can help you with that and align my > execmem rox cache for ARM64 changes to the desired shape of this API. It's too ugly and more importantly it cuts too many edges. I'll try to bring it into a better shape and will share then Really Soon :) > Best regards, > Adrian -- Sincerely yours, Mike.