From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 E76A23F1669 for ; Tue, 31 Mar 2026 10:25:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774952735; cv=none; b=JtyhVWR56uLnjOIcsERDJv0Br1prFd++l5It6+32hbIpsrolcE9JpVNJzvNj+fQpnLlajdZ6FjVaRgH2JB5LGEHyQK8cKPZKb0nsKjh74hEojoM334A3VEoAfLZrBIfm3RRPrlxK89JkxveKS98u/X+dmkBOoq5yfgV0FAlp6JY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774952735; c=relaxed/simple; bh=MWxD5Xud8PaQBgEl6/Iq/BRIAtIx2Iez6G4dgjXjk8c=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=F6+Pq7jDGsvh/ynhNac5QzaX86LaPCLTBDNgwz8I63mvqckcfagueKsMOCGb9TAMRXgysw/ZB5ZfSK0UU433jLE9KcBWWsnrwEr2xsZKUM45SRUHHlartqzML0A0BJPTBgLXCMoDpRjmsr/58dcZcV4YTQeOu7gQKOPpCuQ5gy4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=FqAYG12Y; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="FqAYG12Y" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774952733; x=1806488733; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=MWxD5Xud8PaQBgEl6/Iq/BRIAtIx2Iez6G4dgjXjk8c=; b=FqAYG12Ye+ctlUbyDhJKj+oiIqEN7EGhXewr8PEnMVpgm3IAe+kIFYN1 oRJajDjGNK3AqQBD761b8BC+JqtjR4bhETQIg6wsMfPp2ibaQOdsYQMpn XrMWbEsqE9ZzURiaEdw+DWx1Vme8MTvvilszkCIO8lYer9l6uuJ37wgYP O4+BpOh80Ol9NmOLbshb6ZK2tGtscMa1dYC77+gRYZZrVvo+EVM2MCcoy 6HIbNJER9me/8T138nZ8XwcMooIIUSAKL5TND9mCwtdbh/v6rquuqZQPY 85z+FvTHSbQ2d820bSBJs9ePQ5frAsVgpv/89iK30+uVU1mLb4+ns6KI1 Q==; X-CSE-ConnectionGUID: o+UTEamgTwWPRmHLr+l3KA== X-CSE-MsgGUID: saEkpMIcQrOhAyR9mfoIeg== X-IronPort-AV: E=McAfee;i="6800,10657,11744"; a="93348672" X-IronPort-AV: E=Sophos;i="6.23,151,1770624000"; d="scan'208";a="93348672" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Mar 2026 03:25:33 -0700 X-CSE-ConnectionGUID: nyYvKD0YQhWBLeGY0Hx2IQ== X-CSE-MsgGUID: iyOAf8RtTXyVfKGA1VNvtQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,151,1770624000"; d="scan'208";a="223445893" Received: from unknown (HELO [10.239.158.60]) ([10.239.158.60]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Mar 2026 03:25:27 -0700 Message-ID: <67d66d1b-8ff9-4ca8-914b-1c9d57fd892c@intel.com> Date: Tue, 31 Mar 2026 18:25:23 +0800 Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 05/22] x86/virt/seamldr: Add a helper to retrieve P-SEAMLDR information To: Chao Gao , linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, kvm@vger.kernel.org Cc: binbin.wu@linux.intel.com, dan.j.williams@intel.com, dave.hansen@linux.intel.com, ira.weiny@intel.com, kai.huang@intel.com, kas@kernel.org, nik.borisov@suse.com, paulmck@kernel.org, pbonzini@redhat.com, reinette.chatre@intel.com, rick.p.edgecombe@intel.com, sagis@google.com, seanjc@google.com, tony.lindgren@linux.intel.com, vannapurve@google.com, vishal.l.verma@intel.com, yilun.xu@linux.intel.com, yan.y.zhao@intel.com, Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" References: <20260326084448.29947-1-chao.gao@intel.com> <20260326084448.29947-6-chao.gao@intel.com> Content-Language: en-US From: Xiaoyao Li In-Reply-To: <20260326084448.29947-6-chao.gao@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 3/26/2026 4:43 PM, Chao Gao wrote: > P-SEAMLDR returns its information such as version number, in response to > the SEAMLDR.INFO SEAMCALL. > > This information is useful for userspace. For example, the admin can decide > which TDX module versions are compatible with the P-SEAMLDR according to > the P-SEAMLDR version. > > Add a helper to retrieve P-SEAMLDR information in preparation for > exposing P-SEAMLDR version and other necessary information to userspace. > Export the new kAPI for use by tdx-host.ko. > > Note that there are two distinct P-SEAMLDR APIs with similar names: > > SEAMLDR.INFO: Returns a SEAMLDR_INFO structure containing SEAMLDR > information such as version and remaining updates. > > SEAMLDR.SEAMINFO: Returns a SEAMLDR_SEAMINFO structure containing SEAM > and system information such as Convertible Memory > Regions (CMRs) and number of CPUs and sockets. > > The former is used here. > > For details, see "Intel® Trust Domain Extensions - SEAM Loader (SEAMLDR) > Interface Specification" revision 343755-003. > > Signed-off-by: Chao Gao > Reviewed-by: Kai Huang > Reviewed-by: Kiryl Shutsemau (Meta) Reviewed-by: Xiaoyao Li