From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D3826248F57; Mon, 1 Dec 2025 20:10:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764619842; cv=none; b=VFlw0Xc+lfwG/GMod8ULVxUQ+f8Iuv7Khliy1Ic4nf7NOMbk2vOib/D1i0ja6tqNAxisBJWdmGDE7FTAPT/8eLCT69g99Ksl7DVkzoQy8qo5zbcp1BJ5yaos3DjTvlGXBT0WFT8KkpzOZgPAeOTXY05j9WfVyFFYw7stYsB7csk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764619842; c=relaxed/simple; bh=hoZr9ZDqrSasGQq9xDqBsQud6miZ87nkO1FhX8K27vc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=mtZqg1AyvNZe3KGklOxqvWsPbzDP73WZ3lJnrilmghOsYr0jDjIhENHkhFcMpiVC1aC2++mERcggv+BMCKs9T58gQ4tnqkTPeCGUr9owgjzjnOiphu+GqR4C2XOtHKtNCvQo/jwikz8dd72JO0yu4CZ0bci9uPvIYyeYn7wgxRM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=F1QVgUHM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="F1QVgUHM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E2A0DC4CEF1; Mon, 1 Dec 2025 20:10:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764619842; bh=hoZr9ZDqrSasGQq9xDqBsQud6miZ87nkO1FhX8K27vc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=F1QVgUHMWRD99MrQdXIUYwpvo8wZMIhpPmXAQZoBiJfHgVYuQUXLMhLU17qdMQEi0 NZy1bOijLnnaFdsm89ArW2j4zCra6sxNc2nik11uGWKeTo5KwTxTnS+cOKXB3U2LR2 tjTfN/oHANb0DRigoVJ0hNLCEPkmaZbNDhagE+6nPnLByxcv/4jKfW56kF8ROYiTSP 1LEaYjIFbzKYK8LXluqCMvdB3x9GcCehti4X37rq2C1gF5ju2VYoqUuISlkOtO+1My KWOEL2xibAh6obECR7KhRg2eNpGswQtmO2brUCDPs1BrVkqdWr7VUXa4LuSrEiQOOp tZ+DtTsqQsv+w== Message-ID: Date: Mon, 1 Dec 2025 21:10:26 +0100 Precedence: bulk X-Mailing-List: linux-efi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 2/4] mm: Add support for unaccepted memory hotplug To: Borislav Petkov Cc: Kiryl Shutsemau , "Pratik R. Sampat" , linux-mm@kvack.org, linux-coco@lists.linux.dev, linux-efi@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, ardb@kernel.org, akpm@linux-foundation.org, osalvador@suse.de, thomas.lendacky@amd.com, michael.roth@amd.com References: <20251125175753.1428857-3-prsampat@amd.com> <66ylzwknm4ftd6utn3nqr63jmhl2ccvcdvyi5fechfnvmfxivu@37pckhjixayh> <20251126223127.GIaSd_v7juUkaW4RTA@fat_crate.local> <20251127181233.GBaSiUkaLzwANS_6WT@fat_crate.local> <20251128113411.GAaSmIs0kSWGhCYkaA@fat_crate.local> <47927c25-a317-488a-823f-ac0588f4eee4@kernel.org> <20251201111201.GAaS14AX18qeHN20xf@fat_crate.local> <052d7f47-edb6-4978-bc9a-c7eae469720f@kernel.org> <20251201191036.GEaS3oLBY8PEuE91Ap@fat_crate.local> From: "David Hildenbrand (Red Hat)" Content-Language: en-US In-Reply-To: <20251201191036.GEaS3oLBY8PEuE91Ap@fat_crate.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/1/25 20:10, Borislav Petkov wrote: > On Mon, Dec 01, 2025 at 07:32:38PM +0100, David Hildenbrand (Red Hat) wrote: >> I think we are in agreement: from what I recall, this software contract used to be >> rather simple and stable. > > Ok, please point me to the *explicit* document in our tree which says: "we > won't break the kernel and support kexec with any kernel version"? Just to be clear, I don't think it exist and also I don't think that it should exist. > > Something ala Documentation/process/stable-api-nonsense.rst > > Which says things like: > > "Assuming that we had a stable kernel source interface for the kernel, > a binary interface would naturally happen too, right? Wrong." > > Which I read as a "no" to the kexec question too. > > IOW, it is not about whether it works or not - it is about enforcing that. Agreed. -- Cheers David