From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) (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 929F9313D63 for ; Fri, 19 Sep 2025 14:22:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758291763; cv=none; b=cZB+6NmFT64drSCyxKfKgUPDv64gdjukBkbPrjRlYGds3aafihP1yEn/L4uFOznuiiqnEpC+ArKj3FqizXyLHinO0S96hl/OiQnVFqVnjEhcS0LsRU0qi6wTWc9Tq+lEkZxyFsEBVYgFnMyUUtyW/q/pQHv1Gjqur7dhVIuRgYw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758291763; c=relaxed/simple; bh=saISOgy/aY12ahSOh6X8gb4rifF/7Y+GG05FwdQ7B30=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jNzgjyo1Ge6nvCINpcFq06xFSWfHhrPBNn3dDALJkf3mAMy2mCGCymATQVQiEIEg5jrYbapBsApZi/yffULbEneL/c26t/whHsSPF4pG/nt65q3EyOPp+0gk46lN1yuEWM4Wp2RkLrSImdP0TLrsfnWy8N66O56ye8VKUvDfdZI= 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=AzDuq716; arc=none smtp.client-ip=192.198.163.15 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="AzDuq716" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1758291761; x=1789827761; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=saISOgy/aY12ahSOh6X8gb4rifF/7Y+GG05FwdQ7B30=; b=AzDuq716TW4lOQABTKdCag8UUNrOvle5LbCP0Rw8Z1yWGd3dSeK4RRCV Jqc3V37cMhaSYaG361ou3abBhYO0aVTKzhL/qR5H2q28TlRk8eWQwtCpD rYr16OthsN/EChOB4NVEjwvos9LzQTRta/m4T2+Fwd68zhKzBM53dRZ93 AF8AUqvK3kXSB2JCt2r2a0IaWCI3ZYsopq7w5kP6ZFIe3PIAJeCxro4Dq RfMjLGeQlcoXSJJpzvf+Khw/9/WvZdyFje5uy7QDwORkgZgK3404a179T mrhYjuCoiF0ryNQDZ3UqwPA0XbK+Drihi5RwtE2D4hOghxHHvh2Nc7IOv A==; X-CSE-ConnectionGUID: umftGrmeTMKS1ZsYM48ADg== X-CSE-MsgGUID: sItjXN0wSVyGen2JUlyz5w== X-IronPort-AV: E=McAfee;i="6800,10657,11557"; a="60750524" X-IronPort-AV: E=Sophos;i="6.18,278,1751266800"; d="scan'208";a="60750524" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Sep 2025 07:22:37 -0700 X-CSE-ConnectionGUID: S94gtCVEQMKJAUMFEzcR8w== X-CSE-MsgGUID: TqZdYQRRTZC/6DUTGycz/A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,278,1751266800"; d="scan'208";a="176655010" Received: from dwillia2-desk.jf.intel.com ([10.88.27.145]) by fmviesa010.fm.intel.com with ESMTP; 19 Sep 2025 07:22:37 -0700 From: Dan Williams To: linux-coco@lists.linux.dev, linux-pci@vger.kernel.org Cc: xin@zytor.com, chao.gao@intel.com, Xu Yilun Subject: [RFC PATCH 07/27] TODO: x86/virt/tdx: Read TDX global metadata for TDX Module Extensions Date: Fri, 19 Sep 2025 07:22:16 -0700 Message-ID: <20250919142237.418648-8-dan.j.williams@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250919142237.418648-1-dan.j.williams@intel.com> References: <20250919142237.418648-1-dan.j.williams@intel.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Xu Yilun Add the global metadata for TDX core to enable extensions. They are: - "memory_pool_required_pages" Specify the required number of memory pool pages for the present extensions. - "ext_required" Specify if TDX.EXT.INIT is required. Note for these 2 fields, a value of 0 doesn't mean extensions are not supported. It means no need to call TDX.EXT.MEM.ADD or TDX.EXT.INIT. ---- TODO: This patch should be auto-generated by script but for now the TDX Connect part is not published in global_metadata.json so make the patch manually. The correct way should be: The code change is auto-generated by re-running the script in [1] after uncommenting the "td_conf" and "td_ctrl" part to regenerate the tdx_global_metadata.{hc} and update them to the existing ones in the kernel. #python tdx.py global_metadata.json tdx_global_metadata.h \ tdx_global_metadata.c The 'global_metadata.json' can be fetched from [1]. Link: https://cdrdv2.intel.com/v1/dl/getContent/795381 [1] Signed-off-by: Xu Yilun Signed-off-by: Dan Williams --- arch/x86/include/asm/tdx_global_metadata.h | 6 ++++++ arch/x86/virt/vmx/tdx/tdx_global_metadata.c | 14 ++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/arch/x86/include/asm/tdx_global_metadata.h b/arch/x86/include/asm/tdx_global_metadata.h index 060a2ad744bf..2aa741190b93 100644 --- a/arch/x86/include/asm/tdx_global_metadata.h +++ b/arch/x86/include/asm/tdx_global_metadata.h @@ -34,11 +34,17 @@ struct tdx_sys_info_td_conf { u64 cpuid_config_values[128][2]; }; +struct tdx_sys_info_ext { + u16 memory_pool_required_pages; + u8 ext_required; +}; + struct tdx_sys_info { struct tdx_sys_info_features features; struct tdx_sys_info_tdmr tdmr; struct tdx_sys_info_td_ctrl td_ctrl; struct tdx_sys_info_td_conf td_conf; + struct tdx_sys_info_ext ext; }; #endif diff --git a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c index 13ad2663488b..69be16c1e6ec 100644 --- a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c +++ b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c @@ -85,6 +85,19 @@ static int get_tdx_sys_info_td_conf(struct tdx_sys_info_td_conf *sysinfo_td_conf return ret; } +static int get_tdx_sys_info_ext(struct tdx_sys_info_ext *sysinfo_ext) +{ + int ret = 0; + u64 val; + + if (!ret && !(ret = read_sys_metadata_field(0x3100000100000000, &val))) + sysinfo_ext->memory_pool_required_pages = val; + if (!ret && !(ret = read_sys_metadata_field(0x3100000100000001, &val))) + sysinfo_ext->ext_required = val; + + return ret; +} + static int get_tdx_sys_info(struct tdx_sys_info *sysinfo) { int ret = 0; @@ -93,6 +106,7 @@ static int get_tdx_sys_info(struct tdx_sys_info *sysinfo) ret = ret ?: get_tdx_sys_info_tdmr(&sysinfo->tdmr); ret = ret ?: get_tdx_sys_info_td_ctrl(&sysinfo->td_ctrl); ret = ret ?: get_tdx_sys_info_td_conf(&sysinfo->td_conf); + ret = ret ?: get_tdx_sys_info_ext(&sysinfo->ext); return ret; } -- 2.51.0