From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 0A9673ADBAF for ; Thu, 4 Jun 2026 17:14:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780593265; cv=none; b=NDmLQhkisQZNbfTpeBHHIfGeZIj6wjuYfmlLqAoq3qzvuFkZ+pDDgGE4RBVesVyXTeXmLhI7lyDaIoAOOom6bmc4Ela0HntrlippEhRYGYgvNeDpPKF2fWiFSKqU9CUKcztjUnLA6Mh3SofUoJYxB+RZo6WHQFLFha597QPmrJU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780593265; c=relaxed/simple; bh=Is4h+tK1rCLbuW3KFCxbMSU9HjKfJ8hOG/p6BWn6+ns=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=rOgRMUgEZ/mGMg4RdL5QAs8hzaymSElIfYOTK/3FTsDK+AI/eh6VMoCJS3rtDoZlAhJ+EPJG7tYVddvxrJjoeIqPpUnoJHFbS0mXDPDM60hdoSofzhTy6w94oLOIFGyZjmte5sx4hE8DnKyeBF645xz5WS1o+WXwn66gsC4HiYw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gYVF9dJx; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gYVF9dJx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 564011F00893; Thu, 4 Jun 2026 17:14:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780593264; bh=HwwGrQ3Fzu3hXrG2JwBFm+L7WF6JTxE+O6g6sL/Nxfc=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=gYVF9dJxjeIUfHo45RQ8vugLsqtmFMWWQ3j+u3fBUNmTi7BvJByZI8MMJ/6IMyIa3 XpZtM1AzodwggTMKOfCT4WZTRd7cI5lwF18p2343eM4DAjt0rd3GQw/CvaemKaTrA1 fA8bxz83hR4jQUdMp7pWyYWx3h/7WFWv+FUCpDErXpDDefxGwVC588ephd/6Qn4/+Q mtQw1E2bs6zzBFfxKl6s2LO7VLtD+/w/8/MJc0OUn1BDj62csOvSZUy+op2XCfARnh tqqed7lYWCVDareYd40at1tgZrMJT7w3Nf/sq02EEW5ESE4hn9s87jP1js14S+wWYO EQrh5n9fYdWZg== Received: from phl-compute-03.internal (phl-compute-03.internal [10.202.2.43]) by mailfauth.phl.internal (Postfix) with ESMTP id 793C7F40071; Thu, 4 Jun 2026 13:14:23 -0400 (EDT) Received: from phl-frontend-04 ([10.202.2.163]) by phl-compute-03.internal (MEProxy); Thu, 04 Jun 2026 13:14:23 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTEiECQ4MHRqDgrsgwv55MOnKX4gVy+9YgKFybarHA/KVwIk21BBtsmLPhAOt5Ys4j IaL7A+BJTmqIHdPS0Gvg8ZBt7OiMHMFEZdGw8A4LagcjRH7ZVKriGiTNNW4qTQm3txX05k RPE5LiJ0U5EsCtu/9co/h8mxTVBRgP/QDT5W3dveBZ4dLamlAyygHaWOcepNZ9QlKSp3BY 0dpoOKWnvGaHHDVg8avIis9ZzFiQGZbEIikyBkMNQ3rmsomhY30lUbAb7sK9ShJKUvaPW5 p9gQZmMY7hKCAX9AdQH7Ipb6yq4u0VCwnw6k3UE97nTvU/BcU1+bJMBKgSvFNwx/JKdiTR PjpGHUMptXKWaLxSmlxUBZAkhjfujclBKJaT09eQjieq75wrMj+gwPHPqkHeddogTq6Kze CqaOX9kNMyqAlN+KzPeuLr04O7DfblM69NP7cRbR5ZflZVkLDxsjnsWLocnGiXYvXuFh7K IwwHA1V/GyEcVKcCBK4abCgsspSPYeg70EUYajgfigeLnJlLxWOEoSI9N8mjPRojCfTaRz cHiYhM+P77o8Eir2+f/D5f7oz+p/N7LpQxToS8cV//1iT3VVqh1iGqbj7HuSwoLi+nBSx5 Afj5z9Di+J3CGkto4LEYZRqkLIqV3311GqeK2g9cQvzN5RnLNfvhWHf6/iFw X-ME-Proxy: Feedback-ID: i10464835:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 4 Jun 2026 13:14:22 -0400 (EDT) Date: Thu, 4 Jun 2026 18:14:17 +0100 From: Kiryl Shutsemau To: Rick Edgecombe Cc: bp@alien8.de, dave.hansen@intel.com, hpa@zytor.com, kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, nik.borisov@suse.com, pbonzini@redhat.com, seanjc@google.com, tglx@kernel.org, vannapurve@google.com, x86@kernel.org, chao.gao@intel.com, yan.y.zhao@intel.com, kai.huang@intel.com, "Kirill A. Shutemov" Subject: Re: [PATCH v6 10/11] x86/virt/tdx: Enable Dynamic PAMT Message-ID: References: <20260526023515.288829-1-rick.p.edgecombe@intel.com> <20260526023515.288829-11-rick.p.edgecombe@intel.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=us-ascii Content-Disposition: inline In-Reply-To: <20260526023515.288829-11-rick.p.edgecombe@intel.com> On Mon, May 25, 2026 at 07:35:14PM -0700, Rick Edgecombe wrote: > @@ -152,7 +156,12 @@ const struct tdx_sys_info *tdx_get_sysinfo(void); > > static inline bool tdx_supports_dynamic_pamt(const struct tdx_sys_info *sysinfo) > { > - return false; /* To be enabled when kernel is ready */ > + /* > + * The TDX Module's internal Dynamic PAMT tree structure can't > + * handle physical addresses with more than 48 bits. > + */ > + return sysinfo->features.tdx_features0 & TDX_FEATURES0_DYNAMIC_PAMT && > + boot_cpu_data.x86_phys_bits <= 48; Should we warn for >48? -- Kiryl Shutsemau / Kirill A. Shutemov