From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 EE6F03C1412; Mon, 27 Jul 2026 10:16:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785147376; cv=none; b=M1pLUty4kWcjpXbT7rEtuT2rboDTlPEXcqV6LmPVLBDkohaPEg2nfFXn78U6WsA9kIFxCNU5Ne0ywPEWj+FRb2QPuDYuFsSQwrNCeOIzIyQVkZpjzGEMi4wO8fJukoyEpri/k3PAC45Y+hAONZ+JmrgyPAQ1OygH8BvsoD4o+lM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785147376; c=relaxed/simple; bh=XDd9sD3kB3qr/D6VjaQq8a2zEi+DCyljxrHDR/C5+xI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=haQh6U6KpBo6JhMBfi/jM0RcL27WPr9Uy7LdlCj7oo1ww/ruDSTC9tCUoFJfHmQpOagjxMKg3zIT6G8hR/do96AbGwBzQra/C5bH0QOTH2JvRYtlsS+48/h7qyRnXiPf6bEFNqYf8yFkq+Vno6pRUihIAsMXphJZi5T5LP+jvPM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aeXLGKxn; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aeXLGKxn" 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> Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: 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. 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 17A45C53219 for ; Mon, 27 Jul 2026 10:16:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To: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=5K/pttMcpx/vqI3RkcfW6XFrNRg/+vbPNIacUUZTza8=; b=Tu7dXhUMIytv4i JYB6ubxPX4HeVLDWPMA6Mm2bQhRb5ynvCu0tOP7dT1gi/Ye7IgJat2XqDpByWzmJwTF9X5rYa/jOV 9aDCdGvJlpWBsVqqWBcdq81fqDvRAsQY2tnx8Ryncoq8NrFtH3ma6RLCGJhVLSsQK5s7oViQcITt7 p5qDBAT9Yohss5YlwRR+6L147IGABM/ONgKv6n4Wu6BkBGhIk0NReF+YxUEikLWZ1mcgkOQlI42yv ARA1swdK58RfFkm2Gf2B/w1C1OJNVjyRloJiwT8p7rqeQ4dw6B6Zzvvr8JOt7iEoVA5BVo+RPH8cP v/ZeJET2NzA5onIaeIEQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1woINe-00000002SS1-1qB9; Mon, 27 Jul 2026 10:16:18 +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-Disposition: inline In-Reply-To: X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org SGkgQWRyaWFuLAoKT24gV2VkLCBKdWwgMjIsIDIwMjYgYXQgMDM6MTc6MTlQTSArMDAwMCwgQWRy aWFuIEJhcm5hxZsgd3JvdGU6Cj4gT24gVHVlLCBKdWwgMjEsIDIwMjYgYXQgMDc6MjM6MjNQTSAr MDMwMCwgTWlrZSBSYXBvcG9ydCAoTWljcm9zb2Z0KSB3cm90ZToKPiAKPiBIaSBNaWtlLAo+IAo+ ID4gT25jZSB0aGlzIHNldHRsZXMsIHRoZSBuZXh0IHN0ZXAgSSdtIHBsYW5uaW5nIGlzIHRvIGNv bnZlcnQgYXJtNjQuIFRoaXMKPiA+IHdvdWxkIGJlIG11Y2ggbW9yZSBpbnZvbHZlZCB0aGFuIGxv b25nYXJjaCBhbmQgcmlzY3YgdG9nZXRoZXIsIHNvIEkKPiA+IGRpZG4ndCBldmVuIGFzcGlyZSB0 byBpbmNsdWRlIGFybTY0IGluIHRoZSBmaXJzdCBSRkMuIFRoYXQgc2FpZCwgSSBoYXZlCj4gPiBh IHZlcnkgdWdseSBhcm02NCBwcm90b3R5cGUgdGhhdCByZXdyaXRlcyBhcmNoL2FybTY0L3BhZ2Vh dHRyLmMgdG8gdXNlCj4gPiB0aGUgZ2VuZXJpYyBDUEEgaW5mcmFzdHJ1Y3R1cmUgYW5kIHJlcGxh Y2VzIHRoZSBleGlzdGluZyBpbXBsZW1lbnRhdGlvbgo+ID4gb2YgcGFnZSB0YWJsZSBzcGxpdHMg Zm9yIHN5c3RlbXMgdGhhdCBzdXBwb3J0IGJibWwyLiBCdXQgdGhlcmUncyBhIGxvdAo+ID4gb2Yg eWFrIHNoYXZpbmcgdGhlcmUgdG8gZ2V0IGZyb20gYSBQb0MgdG8gYWN0dWFsIHBhdGNoZXMuCj4g Cj4gQ291bGQgeW91IHNoYXJlIHlvdXIgUG9DIGZvciBBUk02NC4gSSBjYW4gaGVscCB5b3Ugd2l0 aCB0aGF0IGFuZCBhbGlnbiBteQo+IGV4ZWNtZW0gcm94IGNhY2hlIGZvciBBUk02NCAgY2hhbmdl cyB0byB0aGUgZGVzaXJlZCBzaGFwZSBvZiB0aGlzIEFQSS4KCkl0J3MgdG9vIHVnbHkgYW5kIG1v cmUgaW1wb3J0YW50bHkgaXQgY3V0cyB0b28gbWFueSBlZGdlcy4gCkknbGwgdHJ5IHRvIGJyaW5n IGl0IGludG8gYSBiZXR0ZXIgc2hhcGUgYW5kIHdpbGwgc2hhcmUgdGhlbiBSZWFsbHkgU29vbiA6 KQogCj4gQmVzdCByZWdhcmRzLAo+IEFkcmlhbgoKLS0gClNpbmNlcmVseSB5b3VycywKTWlrZS4K Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LXJp c2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9s aXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK