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 BC98A2B9B7; Wed, 18 Mar 2026 16:17:00 +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=1773850620; cv=none; b=HAg4bTOcXD+qLswI4kDLj+8R/GorTcbf24NLbCunHgUDaIN1YxvpV9WRYENqp+gjX663PtYgqKmSOtkByoow+wtVKC1PuMBA6pcawwFsQtdAfbnYzmReBPT4ux9mh9ZpYxk5EgIiMwwiGKaZENgmjZlPlAzQpXx9ccDwPqvJlJc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773850620; c=relaxed/simple; bh=nikIQ5WWnDkcra9ZrAZlo2ANEg12v0c7OcUhEbKbnwY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BgByypk0B8CiuOY7HZ0AM+FsGB4XbP7yG/nCS696py4klpBBHnwqfZFIVWCvVm2HEuqkyanoYGYKhug+3gRugqtznC4F2mCQ2MAluy+Hg0IuTn7Y271PMCbaVxm2kbSHSWHDg/i7yXRTKWI89RcgLvPdVZj2YWBtyFz+PESZaQU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Bni1YBeq; 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="Bni1YBeq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7C60EC19421; Wed, 18 Mar 2026 16:16:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773850620; bh=nikIQ5WWnDkcra9ZrAZlo2ANEg12v0c7OcUhEbKbnwY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Bni1YBeq1vKGJn8qKlbC2ZRHfOoGozjeHyAb8KJHT8zrj6WfMGd4XOC63MnvVJjoV lLYca6AOPbPNifuc4WB1U8+a03zgkTrzhkJLb/CeOrcyg+Q2vX1SVUXHB7ShOh0+jX RSrFRmgOpIuoQNVaxgC4nII2XCg8hF0u95tNGYHEhx2fC12rmz9V4Ek3PgqRLlZe+E XC69PXrJT71NkTa48c0KaJD47QhYNdTWZOCIwLA024VFv5vqGvlxTJa7JrzQbloxLr QXpehjD1L6BSy2NiBxjPOgBg7+Q7mmHFQEPoP+68W8bFFotXjC22pMm9F0q2r8f9MO efYRLEpNN8Cwg== Date: Wed, 18 Mar 2026 09:15:58 -0700 From: Eric Biggers To: Dave Hansen Cc: Marvin =?iso-8859-1?Q?H=E4user?= , Jann Horn , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H . Peter Anvin" , x86@kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Peter Zijlstra , Roxana Bradescu , Adam Langley , Ard Biesheuvel , "Jason A . Donenfeld" Subject: Re: [PATCH] x86: enable Data Operand Independent Timing Mode Message-ID: <20260318161558.GA2255@sol> References: <8b2771ce-9cfa-54cc-de6b-e80ce7af0a93@intel.com> <16e3217b-1561-51ea-7514-014e27240402@intel.com> <851920c5-31c9-ddd9-3e2d-57d379aa0671@intel.com> <33E64985-BE38-49D6-AB1C-CD7CFC1D08F1@rptu.de> <7dfb5fe7-295f-4a29-a633-c2907a1fdb60@intel.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org 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: <7dfb5fe7-295f-4a29-a633-c2907a1fdb60@intel.com> On Wed, Mar 18, 2026 at 08:44:05AM -0700, Dave Hansen wrote: > On 3/18/26 08:33, Marvin Häuser wrote: > > As I haven’t found any news on the list or the tree, I'd like to > > inquire whether there’s been any updates on the situation. > > I'd summarize it like this: lots of meetings, no updates. > > IMNHO (and not speaking for my employer) DOITM itself is dead. There's > almost no chance of Linux ever doing anything with the existing, public > DOITM architecture. Doesn't DOITM still need to be enabled by default for now, given that data-dependent timing is a backwards compatibility break and code hasn't been updated to account for it yet? - Eric