From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) (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 7CF342FA0DF for ; Thu, 18 Jun 2026 20:11:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=65.109.113.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781813497; cv=none; b=Szah8+vuzk2+DZbYWlBqIAs2sU3vEkhWNY1wBvWnohDhQbLO3s0gazkvpNlWJXKoE+bjragVsG+y5L1hBtBBjiFd3nPMvQAj668YQuGI8ktUOFZoKoXdgvqyVmap+waSbE66w63ZtBKK9rndA+pJi3jZCkicvFdUk7jaarlylKg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781813497; c=relaxed/simple; bh=bR6CgrTL8L9kbMWcBO10mVoLhF34gJMLuouRnWjZ564=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ju001wtmIAEnfZXL1Cv7DdpEG0QxAvIZlwd0KPWmNGPTCgaHjywo0LYMvzid1ID8XOhABAhg/MTAzDEX7ocibhhrHIUKp6AV4yW5ZsmneRvfDx6cs1J6iNLZIhXvQakVWePJEYG5OAx6qEYMRsOQ0s+QSod1yDBUS3ziRYNRjEM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de; spf=pass smtp.mailfrom=alien8.de; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b=DFsDXOVY; arc=none smtp.client-ip=65.109.113.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alien8.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b="DFsDXOVY" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 4F09840E02A2; Thu, 18 Jun 2026 20:11:34 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Authentication-Results: mail.alien8.de (amavisd-new); dkim=pass (4096-bit key) header.d=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 6gZYi2X4M_Mh; Thu, 18 Jun 2026 20:11:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1781813484; bh=WymufkYy9irEHcYu9yFQ9mnRS4Zsr6ANxKVWzHI9Ae4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=DFsDXOVY9N3yVMWpXubiXdLevyL3JPmotJBGGhpNsaC3jyA4SiPH0g1EW3gUfE2hn IjShW55ybqtjgL8Rt3kIj0PnlLyl9bhKz97huLZdhO6aZMdmtQxqk5HnSb6eqEdi/c QjG5XnRckfd4NFxJBWitnlSq7uoIEwwOFLJEJSgCwIX1uCIMtb5pfS8WANErCdEyb+ zHnvHx2Zhyuhi+xv2qW+h40lNdWbTJpE9iBw5tdA4cOJEzrLyPMKlEajNQmVP3iWHK +KFh892XDMCWZUEt0bgjutD3zh63DNo8h7jdDnq3AELf4u3bcBugJ6O2IdXWeA7vU+ pq0ctKvkUsUrldfpE5DAhtmHmPYfjENLI6ZYR4/JHVVP0CR55s7K2lL1YEtYMMlfom 2oC4tu88AjywYSrQPwbauBQtRjWR+rgni6VbbGITBXMEkTbdHZr0rugOJW3V8tcofx fBlluw+onGgQs8v4Ql8ABw4FVxmRqmnsNR/EdFt4xZtdqhV+gWF6GsxHzPaweNEo8I YHVKhgEh2ADBsXTHi6IekekoW/+MdYMcyHDwposvnTTvt0WXdqA3K93tGaZhQe3rTL loX06M5tT1rwL1EIwRU8i5TerLv3Q5lBaXKUCjRPrKpvl+Br2wLVcQpG9Baxk9f68i 6P3sRLxn7rbNldxPhQidBazw= Received: from stx.tnic (unknown [IPv6:2600:1700:38ca:c00::1a]) (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 ESMTPSA id 6E77540E01D8; Thu, 18 Jun 2026 20:10:49 +0000 (UTC) Date: Thu, 18 Jun 2026 13:10:46 -0700 From: Borislav Petkov To: "Kalra, Ashish" Cc: tglx@kernel.org, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, seanjc@google.com, peterz@infradead.org, thomas.lendacky@amd.com, herbert@gondor.apana.org.au, davem@davemloft.net, ardb@kernel.org, pbonzini@redhat.com, aik@amd.com, Michael.Roth@amd.com, KPrateek.Nayak@amd.com, Tycho.Andersen@amd.com, Nathan.Fontenot@amd.com, ackerleytng@google.com, jackyli@google.com, pgonda@google.com, rientjes@google.com, jacobhxu@google.com, xin@zytor.com, pawan.kumar.gupta@linux.intel.com, babu.moger@amd.com, dyoung@redhat.com, nikunj@amd.com, john.allen@amd.com, darwi@linutronix.de, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev Subject: Re: [PATCH v8 7/7] x86/sev: Add debugfs support for RMPOPT Message-ID: <20260618201046.GGajRQxrh8ekVMeyJS@fat_crate.local> References: <20260618180814.GCajQ0Dv0CoRMJxbP0@fat_crate.local> <5849645c-f701-4768-8cdf-1f9032e3226f@amd.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5849645c-f701-4768-8cdf-1f9032e3226f@amd.com> On Thu, Jun 18, 2026 at 02:57:45PM -0500, Kalra, Ashish wrote: > Maybe i can add a line to this patch's commit message stating it's a debug-only interface > with no stability guarantee. Sounds to me like you didn't really read that article. > We have to provide some method/interface for users to verify if RMP optimizations > are enabled for a GB range of memory. Sounds to me like this wants to be a facility which is present in the kernel and it is going to be an ABI. I am unclear on the real use case but I'm open to being persuaded otherwise. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette