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 6B8DED1119B for ; Wed, 26 Nov 2025 22:32:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BF3D26B0006; Wed, 26 Nov 2025 17:32:02 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id BCB806B0022; Wed, 26 Nov 2025 17:32:02 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B07CA6B0024; Wed, 26 Nov 2025 17:32:02 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id A27846B0006 for ; Wed, 26 Nov 2025 17:32:02 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 47AA78A4BE for ; Wed, 26 Nov 2025 22:32:02 +0000 (UTC) X-FDA: 84154207284.08.BCD87A3 Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) by imf09.hostedemail.com (Postfix) with ESMTP id D602C14000C for ; Wed, 26 Nov 2025 22:31:59 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=alien8.de header.s=alien8 header.b=FKCD5IxZ; spf=pass (imf09.hostedemail.com: domain of bp@alien8.de designates 65.109.113.108 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=pass (policy=none) header.from=alien8.de ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1764196320; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=OCGX52XkArpHRB0malEGuxEN88kirZhyxtG2hjA3Tq0=; b=doPwv7AmGkF3t+hDjc+Y5k1tUkHyWQyZ5Biu9Qgy8JKEq5S46JJooIc1GlMfCyOqsBt/fw FjMqt2fvli7mP6nTrpmZIBaPlnkH8qcRsgXYAn6aFssU4h+Hu4lEVqu8oVcxdogPPuV0ht iYAcgP8oumMg404s+9RfXgL6GwOWNOs= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=pass header.d=alien8.de header.s=alien8 header.b=FKCD5IxZ; spf=pass (imf09.hostedemail.com: domain of bp@alien8.de designates 65.109.113.108 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=pass (policy=none) header.from=alien8.de ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1764196320; a=rsa-sha256; cv=none; b=MvA0+hmvInqUpCMmmqm+sH6cTnmNb23bTh/r6jyvRrBo9lCTaEIRxeDe6fuFBTLjh0Qxtf caez+x0Js6K4vcMZfj866nTOwsMH3h74vIB0WlUbEU7Ktrv+Lr58KqVvayjyo7YMCHpLq0 KwvwgVerFO+5z5xDeNIWHDn/NUDzPJI= Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 5D96040E0200; Wed, 26 Nov 2025 22:31:56 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Received: from mail.alien8.de ([127.0.0.1]) by localhost (mail.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 78zWO8m3eFdW; Wed, 26 Nov 2025 22:31:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1764196310; bh=OCGX52XkArpHRB0malEGuxEN88kirZhyxtG2hjA3Tq0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FKCD5IxZ9QnWpJ6q9qf720njFD3v3xcOuhp5akzBOPGn6LfBpD4pj0ZRi215bvnVd rKEuDt62gtO0ZqxVH2oUTEnSjivuz2c5IgvYkFx5NADGFttr8SDsZljG7VXKm0n1Ki 4ZAlNYITs7YAbfwbdT9Ylcfo3LXCtUC+6avsoBBVWULZ+cAt3eFZBLWcKM3jvyXxHy av9ayYWfs3vN6OBlkiYz59JuXysW9VOO0SbTilZ4AfAfpzh2H9kpFQafx7VfPQzn2g 7PaxTQ7lDppVk2FXZIeGEwWDrcuz01l1Wya8Q/cG2hBII2Ua0+YTJzLBy912OBy58s ibqqNlyXL4kcshkVFPIz7cy7+oZfFi5c7x8tSDMo0F3n6SnePE3SLI4wbX/BjtepN5 eCTagNmjXqK80RWzpUjNdYE475JTEyMkWyu8cjqAHGhT99lbonn8ztHu3fq5KGVBKy MQRG/ovQYMfx3yKxblEa/XgnKAOQyg3c7u+ZqwvzOe60qEyxxlRVBc2bzCiJvEONz6 10t+lqAl0vM6B6lllVejc/uCvaJpOI/H/BW25LegEM2ut6aoXvZ+cKflFwt13yvb9/ AUbFn2SRxndw4kmPfncF0MmlINuHIdLn6DvLTdPNqq8rUFgGh+wnbsgGwSdULm3881 zPwSiP/GKjKYduli36CePJ0k= Received: from zn.tnic (p57969402.dip0.t-ipconnect.de [87.150.148.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with UTF8SMTPSA id 021BF40E01CD; Wed, 26 Nov 2025 22:31:33 +0000 (UTC) Date: Wed, 26 Nov 2025 23:31:27 +0100 From: Borislav Petkov To: Kiryl Shutsemau Cc: "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, david@redhat.com, osalvador@suse.de, thomas.lendacky@amd.com, michael.roth@amd.com Subject: Re: [RFC PATCH 2/4] mm: Add support for unaccepted memory hotplug Message-ID: <20251126223127.GIaSd_v7juUkaW4RTA@fat_crate.local> References: <20251125175753.1428857-1-prsampat@amd.com> <20251125175753.1428857-3-prsampat@amd.com> <66ylzwknm4ftd6utn3nqr63jmhl2ccvcdvyi5fechfnvmfxivu@37pckhjixayh> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <66ylzwknm4ftd6utn3nqr63jmhl2ccvcdvyi5fechfnvmfxivu@37pckhjixayh> X-Rspamd-Queue-Id: D602C14000C X-Rspamd-Server: rspam02 X-Stat-Signature: ybptk85og833zfhdy6nzmeq6w5b3o84r X-Rspam-User: X-HE-Tag: 1764196319-135900 X-HE-Meta: U2FsdGVkX1+Ic4OLieuwa4T2rO/8E5QkXrA1ygbiT8fnn2GPKNKOL0Sc9YGecwYKgXuvSg1RugLCYi5bOE9TTIdOEX4Wh2gVtb50NsO5MpVjDNeQA/ezGASIK7wW9ivBbFLbKMIN9l3B1fX1sqLG9WMFggl9O43y37phMGq7QCmw6JYnA5BZJ0RbSMIZWJFU9nGukJlwdWjSNbtbAGvc6DTc0xVHkXGs0j0vqdqQTb8S0x85VL7zGhVeRDCh/exlLBgSRDNgp1MVKunr7kVlau69RsUT7yt9uxMJMo1pslPZ90t5HC0j21VwfuYmWE8l1JbiiNVS+4S+10pdO4pyDEv7yV7NJjzJlnZo5qkeNal8VFLprHCVPg2IfdoLb/Lwb9tJZVPCaoKpz6uc244OHikmlvPxQuLLIAWYrnCF5Jke5FRDv7DalBkdKWVh0YBP7s1ntR23TFAwWyq+jAxwuqZTABFo7Qn+vChJFob6L15zQiLUNfMkoxsXMSsMd+sUN0136X/YV/ONYwOktPG9DmJtTQcZlWWMfotz5LTjEOJ9hMfy5nbZj/7pyqp/cnqQJGNoswKX92LnQhtxazkcgWwovDp4ANaCqi9HjzGFPhxCdnjPn4a7UNe/pnmTwXXRYZNzGfYc3Jri7Ww+808aoEK8+xOM3o5r3agbfyeJ15wNJ/DRk0o09zDyEeL63HI9KJmXpXMkvUBAUDstWAp1Hk/uvmNiflKqtLsfoJmdVqHUd5OuSlL36Erh8iRXItRZv4Qpknd8mkHs9E8+rTUhLkF1iUzjNqgLaLZ8ed8EWXoYD5inQxvegJCSp7SOEU7TSheI3WEFNxCLFSpOhddfIPFVzymHq/talXQwdJ7PheIzrZT0cwLheFn/uwkSmQINdtISHwtJ9QXdoieM8NipA1C3/D+jhD3CKrA2Q6o62I3CcGl/DSSLUnhNcbwSBm1Dsn9ddCt17EWK4dFCwhY yQ65hc52 w57Lg+ATa0C9Xpio5XDiJEzQ+q4MZDSvjDV0G1CPk7ujszcufLiRuex+6+rywFJmSsHyVh1z4Inrxezoh2xtKZP0alqk98kKze7UGKRnzW/YwQZ8KpenRDB5s5X9RXeRDANolGUIGeT2yCs+aZxEwnquqUGUnK7etvFC6S2TXmVTTNUMqwo52u6B7QZMgqWJfyOUYCa+Lm39YvDZ8dzKNf8dkB437xQ6S66E/DO9YaI3LGZA= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Nov 26, 2025 at 11:12:13AM +0000, Kiryl Shutsemau wrote: > > diff --git a/arch/x86/boot/compressed/efi.h b/arch/x86/boot/compressed/efi.h > > index 4f7027f33def..a220a1966cae 100644 > > --- a/arch/x86/boot/compressed/efi.h > > +++ b/arch/x86/boot/compressed/efi.h > > @@ -102,6 +102,7 @@ struct efi_unaccepted_memory { > > u32 unit_size; > > u64 phys_base; > > u64 size; > > + bool mem_reserved; > > unsigned long *bitmap; > > }; > > > > Again, this is ABI break for kexec. ABI break for kexec? Is that a thing? Since when do we enforce ABI compatibility for kexec and where are we documenting that? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette