From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) (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 58DA6449988; Thu, 3 Sep 2026 08:12:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.8 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788423165; cv=none; b=FDf9VWwPFBZEpt/eQlaXKvtKFtgNUo1bg1JETsexf7B7D1R1qjdcGl8YsiIM+uk47+1JBShnOMewVhBrhA43itzLX5/YF/MaY/c0yFgy3CLKugwzh4j72m17izINE/JF4+36ttYuZsC6w6irf7BNojp1MhVfE2ALPdgaysgtyFo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788423165; c=relaxed/simple; bh=6w4bfji6hAGZea5dXhSgXU5mFR56zgAIYb4H+KRrPzU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=aZOtfwRvcgtTnOeeZYvfGTQOtGHJILxwW+EUZgepvCa0EOdHi50Ui3MSJDk2iep0LIam/A5uJFGr9mEW5E+EyvZO59zXgVMo7ePJVuH8VMNnQ27DgZwJxWrZkq3Clj67Rre66fCpU4Qw2VrlExupgDBtyUSy+cAKbRChujzYYBQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=FpIYV9AE; arc=none smtp.client-ip=192.198.163.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="FpIYV9AE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1788423163; x=1819959163; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=6w4bfji6hAGZea5dXhSgXU5mFR56zgAIYb4H+KRrPzU=; b=FpIYV9AEQcUhrKPbId7XqRNkm1BwG+/EJMo+vYVdLDQxJkxSP3+RKei+ 1V9z65vy++ZJ2l/nyk2eCKG/24yrYk82eivTl6NnZW1JPygQUWN0Y5kVt hTwMjBOaS20f9G0TF8uim+vZPEhMWiEY8zql2SJCDGleEzEs+7oLSdryR CjERvROhNKgKN8Y6UZgM7uZd+Zr27YOHuyNZ/R4kUMj/LyFn7xDrYjOHs MpmLBeQiHc76+CpUC4V097mBR+3rNidZlGOm2C3+HkVyiXlFb1uKLmrWH ixz4vOnW4PO8mL56lUXFU6aLui51uSyzeuZbur1l2RJDFd6n5K5osKWXD g==; X-CSE-ConnectionGUID: yX4AVdEAToqhLstZ6eODAQ== X-CSE-MsgGUID: 2ThAdPDgS5WxuNYpXN88NA== X-IronPort-AV: E=McAfee;i="6800,10657,11894"; a="106416137" X-IronPort-AV: E=Sophos;i="6.25,258,1779174000"; d="scan'208";a="106416137" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Sep 2026 01:12:43 -0700 X-CSE-ConnectionGUID: /u1yE0FgQGueLdY6JsPdsA== X-CSE-MsgGUID: eSW4BurGRs2Ih0+FrZymiw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,258,1779174000"; d="scan'208";a="307852873" Received: from unknown (HELO [10.238.2.33]) ([10.238.2.33]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Sep 2026 01:12:40 -0700 Message-ID: Date: Thu, 3 Sep 2026 16:12:37 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/4] KVM: TDX: Report CORE_CAPABILITIES as configurable To: Kishen Maloor , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: seanjc@google.com, pbonzini@redhat.com, dave.hansen@linux.intel.com, andrew.cooper3@citrix.com, nik.borisov@suse.com, kas@kernel.org, rick.p.edgecombe@intel.com, xiaoyao.li@intel.com, chao.gao@intel.com References: <20260827031837.2863609-1-binbin.wu@linux.intel.com> <20260827031837.2863609-3-binbin.wu@linux.intel.com> <73beeef9-3ecf-49fc-87e3-6fa30f8f56d3@intel.com> <0c2881c6-3352-486d-be59-e6350fda9ad7@intel.com> Content-Language: en-US From: Binbin Wu In-Reply-To: <0c2881c6-3352-486d-be59-e6350fda9ad7@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/3/2026 2:10 PM, Kishen Maloor wrote: > On 9/2/26 7:22 PM, Binbin Wu wrote: >> On 9/3/2026 1:43 AM, Kishen Maloor wrote: >>> On 8/26/26 8:18 PM, Binbin Wu wrote: >> ... >> >> Actually this is the #VE reduction on fixed-1 bit, which changes a previous fixed-1 >> bit to directly configurable. >> There are several cases of this category, i.e. MCA/MCE/MTRR/CORE_CAPABILITIES. >> However, CORE_CAPABILITIES is the only case that KVM doesn't support for non-TDX >> VMs >> I will add these info to the change log. > > > The cover letter highlights the deprecation case, but it sounds like > you hit this now due to #VE reduction. Is further #VE reduction expected? > If this is altogether rare, then yeah, added measures aren't necessary. No new #VE reductions are expected.