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 1CAD9C5AD4E for ; Mon, 10 Aug 2026 09:33:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F0D686B0096; Mon, 10 Aug 2026 05:33:28 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EE4AB6B0098; Mon, 10 Aug 2026 05:33:28 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DACA46B0099; Mon, 10 Aug 2026 05:33:28 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id ABD756B0096 for ; Mon, 10 Aug 2026 05:33:28 -0400 (EDT) Received: from smtpin08.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id D9014A0410 for ; Mon, 10 Aug 2026 09:33:08 +0000 (UTC) X-FDA: 85084846056.08.8DFF7A8 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf18.hostedemail.com (Postfix) with ESMTP id 0B5691C000C for ; Mon, 10 Aug 2026 09:33:06 +0000 (UTC) Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=CFiZ73qw; spf=pass (imf18.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@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=1786354387; b=oVa0apAL99WeT13kXpAcbqCASCzeJhIt8IfprJukzx1MGfF9jpLhQYHW843AWmeo5FA8F7 YEf9GX3+qu4ontH6egX3EjlybEmUF7SGgb3Zg9KxFcbwIPr0wp/A4lJ93uGfCa64vCZfQF Ksj6yCSj6hBHWC6WdVFilFkjON8fgwc= ARC-Authentication-Results: i=1; imf18.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=CFiZ73qw; spf=pass (imf18.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@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=1786354387; 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=puBatuzKpdITG9/LirLMSAY4o6mBGHBdHb4a5q1RtgY=; b=1Z0JAB9EX8k7uYwDBUs+jrRPNReZlDqW1ZfW2QzOSHJs87hk97VxG7B7L0vE/uWKVt9/jb C4VR0WRKVWFAx73uCPm7SqUGDiua0kZgpdpB8Hq/TiozWss/7/dJo1p29HhRsYCsPa9JWx VV3lvSBRk+BJV2vYaLThA1+Hoty//B8= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 1358C431D0; Mon, 10 Aug 2026 09:33:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 237D61F000E9; Mon, 10 Aug 2026 09:32:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786354385; bh=puBatuzKpdITG9/LirLMSAY4o6mBGHBdHb4a5q1RtgY=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=CFiZ73qwlmdLBwOq0EF9s3+3mq69NpHgrowj1UkIuK9sjUNhZkM2D9QmAG0wujV/1 k7jgB948Mw1Gd1Aty/UekqvJswDyZX4WVeT7cWQA4x83t6GWQqFuKAuJXIc3nT+bXb q9CDlfm5UXlj+3yW/ivOAKboC9UIr07TdDGVhTtfh5jGzFaLNHHpK+ee0xzyCCUyCP la6FjR1ssQobEPVnL2PoMPWL1uadslzCNU5fMFI6MY9Dp6D3dcWl5Du2vc5Vb2zgu4 oHWmiK4HAQt0ZxRSfWd8DWlG8ptVNG5wMTjojS2BF4K1EU/ofhOgRKLJ+Dp8WQ+PEU 4VCGIRMhkbJLQ== Message-ID: Date: Mon, 10 Aug 2026 11:32:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 19/41] KVM: Move KVM_VM_MEMORY_ATTRIBUTES config definition to x86 To: ackerleytng@google.com, aik@amd.com, andrew.jones@linux.dev, binbin.wu@linux.intel.com, brauner@kernel.org, chao.p.peng@linux.intel.com, jmattson@google.com, jthoughton@google.com, michael.roth@amd.com, oupton@kernel.org, pankaj.gupta@amd.com, qperret@google.com, rick.p.edgecombe@intel.com, rientjes@google.com, shivankg@amd.com, steven.price@arm.com, tabba@google.com, willy@infradead.org, wyihan@google.com, yan.y.zhao@intel.com, forkloop@google.com, pratyush@kernel.org, suzuki.poulose@arm.com, aneesh.kumar@kernel.org, liam@infradead.org, Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Andrew Morton , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Baoquan He , Jason Gunthorpe , John Hubbard , Peter Xu , tarunsahu@google.com, Vlastimil Babka Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, Xiaoyao Li References: <20260807-gmem-inplace-conversion-v10-0-2fc18ee6d3ba@google.com> <20260807-gmem-inplace-conversion-v10-19-2fc18ee6d3ba@google.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20260807-gmem-inplace-conversion-v10-19-2fc18ee6d3ba@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 0B5691C000C X-Stat-Signature: ktwudrhbh8uxj5gn3z5gc7tuegyaxatq X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1786354386-471408 X-HE-Meta: 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 tYwUFSWW dPT3dU/mcdaS5bMahsQKExJn3RbcYcvnqWaAGYYCcQc+7H/vKJ6WsBj5guqeGzIMpktjAsxhBYZe0EyslP3eyGlDvzQRbtbbwkGwjFGvikc1SFiYeCb4UF1iV1AcJs+dnbaHUy7rbcoivV2XJftpjIjqKnA+WCl1iZ4bI2BA0DSNO9n0mF2TCVpkfYHWYavqcBwBMfsOOQJR28KUgaWXzYSt55amf2vquOUlTaIFYNcGF9GFiyc+3B7qiF6RctjRih4Aq3QWVHJqv4dKMMJZVX5tV5YcRcKr0CZIso4cgB99n8cWk9xX8rMvbPxJlBieoXNfYEM4ARIIglzhD6ngO1LjoOiiXG8ruYU42TeFfuyI3Ulthx4+N67VuewoeoXzf61G1d0CQjNw6k3iviODOYlMy7A== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/7/26 23:52, Ackerley Tng via B4 Relay wrote: > From: Sean Christopherson > > Bury KVM_VM_MEMORY_ATTRIBUTES in x86 to discourage other architectures > from adding support for per-VM memory attributes, because tracking private > vs. shared memory on a per-VM basis is now deprecated in favor of tracking > on a per-guest_memfd basis, and while RWX memory attributes are on the > horizon, they too are expected to be x86-only. > > This will also allow modifying KVM_VM_MEMORY_ATTRIBUTES to be > user-selectable (in x86) without creating weirdness in KVM's Kconfigs. > Now that guest_memfd supports in-place conversions, it's entirely possible > to run x86 CoCo VMs without support for KVM_VM_MEMORY_ATTRIBUTES. > > Leave the code itself in common KVM so that it's trivial to undo this > change if new per-VM attributes do come along. > > Signed-off-by: Sean Christopherson > Reviewed-by: Fuad Tabba > Reviewed-by: Xiaoyao Li > Reviewed-by: Binbin Wu > Tested-by: Shivank Garg > Signed-off-by: Ackerley Tng > --- Reviewed-by: David Hildenbrand (Arm) -- Cheers, David