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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 83B1BC531D0 for ; Mon, 27 Jul 2026 10:16:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=aPvuz+aL88c21S8YC4GLGVYZg37SgTBgz+cPgSwl5YY=; b=XOIsaJ5vLW9QKOBgVMhKsWB2cz 39wqXxh6Nvah7oTsVrsNqHY3Oz4tskZUWFnnKZFlFCZfjeSAQS324agmJXjUNhV0HoIV1utCx8GDa Ll0gyUX4BwejpaSzJQK4NHCTvHIelkweUK06qurSs/QRTbOjcx+ZVbKleuc4uS4FEzqFsIArmnNJR Y3lNgJzP6q37TEBU/1CYQy6K2zhhpHX00mPEP7QoR+poWWxbgw80mssB75jF5g99UUFlRkF+izSsq xXZFAA2qmOcx6SGFospepKZWi8xrSmn7653/BNVyhWXIUUeeJmyzX6b7UAjGYKv0mg7I5RjtDzyMs EWfpD51g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1woINd-00000002SRS-1T3s; Mon, 27 Jul 2026 10:16:17 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1woINc-00000002SRE-3eY1; Mon, 27 Jul 2026 10:16:16 +0000 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-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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.