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 D058324EF8C for ; Mon, 17 Nov 2025 02:38:20 +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=1763347102; cv=none; b=ZwF4SP3NkAU8zuPaBP9VKHYyWHp/Gko6+7b8rW8+AKKD8NhaV35vUbYLSE/XvTZdZ4k1coUWjAClE9Z6CCwTJDVKXqvFxycjk/wBXgMkrWzQt3qD2k6EvVoMWPXkXXHziB6uhMWkHJXKKx2901r3Ooj+RgjYzm4pZhngMOeF3yE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763347102; c=relaxed/simple; bh=CUfitXBEKhWWRq7ue5rb8F5I+c8tczv8PbchN0QVA4M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=LXTjYwyinRiqZoJHBDdK1LMJgDfmNHmS+drKGv6PRllGGa0ddjFauvjjl/hlbtKwTiJLNMUzSQ5iLQNF6MVTzeRqFFty2ZXbwqhTI89DLjlVnqjVkSDSGcu6wU6oYS9VDqPkNq1zw8ZP3hCZn/gbCcydr4csGftuvL5Wbq3xdks= 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=RjT7IoAW; arc=none smtp.client-ip=198.175.65.10 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="RjT7IoAW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763347101; x=1794883101; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=CUfitXBEKhWWRq7ue5rb8F5I+c8tczv8PbchN0QVA4M=; b=RjT7IoAWlC1kKwz3o2g32Ntz7dEGu7F+xUWpjDoNbyYiOZjs8ZVO1dEe XwVwB2xhkQMPlDN+6Kf+xYQVrlRJhAaLdpq4VvwUiEcbIVUy4x3TPKWv1 GKrfgkDJ7eyFj/4BrMHL2QevqgyheVIzCyukKh6sqc2wUEfFLHum6sx6V 3t+488y4hHNGn8dxZRmvnkj9KYfx+NEZJdz9K/fmmBIap1Vc1i47vVhrp xivvyUnGZkjOsXTFCs10YVCzXZ4Yhga/n3Fs/1DuZB5szHWbvl7tAej5s rwr3rTbl76snRgHzh4blMqo9ndxXee+BQmEkyXTG+YtIalkuR4N9jGoVw g==; X-CSE-ConnectionGUID: ZNsuOzAqRj+AgnXCgVlk8A== X-CSE-MsgGUID: 9W1buF9DQrWb/Ms5k9TkqA== X-IronPort-AV: E=McAfee;i="6800,10657,11615"; a="82729523" X-IronPort-AV: E=Sophos;i="6.19,310,1754982000"; d="scan'208";a="82729523" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Nov 2025 18:38:21 -0800 X-CSE-ConnectionGUID: wtwdRdzEQ+e55Insjy9eSg== X-CSE-MsgGUID: SExPnkMySVmvUbr67t4qzg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,310,1754982000"; d="scan'208";a="227658225" Received: from yilunxu-optiplex-7050.sh.intel.com ([10.239.159.165]) by orviesa001.jf.intel.com with ESMTP; 16 Nov 2025 18:38:17 -0800 From: Xu Yilun To: linux-coco@lists.linux.dev, linux-pci@vger.kernel.org Cc: chao.gao@intel.com, dave.jiang@intel.com, baolu.lu@linux.intel.com, yilun.xu@linux.intel.com, yilun.xu@intel.com, zhenzhong.duan@intel.com, kvm@vger.kernel.org, rick.p.edgecombe@intel.com, dave.hansen@linux.intel.com, dan.j.williams@intel.com, kas@kernel.org, x86@kernel.org Subject: [PATCH v1 07/26] x86/virt/tdx: Read TDX global metadata for TDX Module Extensions Date: Mon, 17 Nov 2025 10:22:51 +0800 Message-Id: <20251117022311.2443900-8-yilun.xu@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251117022311.2443900-1-yilun.xu@linux.intel.com> References: <20251117022311.2443900-1-yilun.xu@linux.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 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. 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 360963bc9328..c3b2e2748b3e 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 __init int get_tdx_sys_info_td_conf(struct tdx_sys_info_td_conf *sysinfo_ return ret; } +static __init 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 __init int get_tdx_sys_info(struct tdx_sys_info *sysinfo) { int ret = 0; @@ -93,6 +106,7 @@ static __init 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; } -- 2.25.1