From nobody Thu Apr 2 17:10:29 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (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 44001401A30; Fri, 27 Mar 2026 16:24:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628647; cv=none; b=ssk2EtSQA3Hd7MfRqJlPFDLMhtKocDcIgX4IGfbIpNSU2L95TlW0diuZ+g9OWW57bhUik8lkG/m+AQP+gdTVOS6Jr8C7zWAR6vG6GkXUVD4hjIBYMLU7AVQFdQulm6EUGdpyA3RNnNBijQQuqlrXo3yhSqj7tgNYynvz4JuxAnk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628647; c=relaxed/simple; bh=d5v7kombDkpimMLhqFIFaDnGOds7NdDu5NS7qDGKkQQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=GJb9flL6xva3WJtF1vHe5xRr/NtQ3oCNM0rutGYHS9EIufu6zKgQlkpzOmlRfbAjmnIWolcay4u73xzUCKSSXQGu2fv2nvMs5F2T/2ntcBWVtWMotg6eCAVgh/wg674svs5H/FwcVlrjIFlZJ5/qjhE0izDSzHBfJmkbkT2dprI= 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=cItCTTno; arc=none smtp.client-ip=198.175.65.14 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="cItCTTno" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774628646; x=1806164646; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=d5v7kombDkpimMLhqFIFaDnGOds7NdDu5NS7qDGKkQQ=; b=cItCTTno3cWJQBKSSyco1N9pQ12QOIO6n7k4ZTTZNp8QEvzzXFBv8vbN J4kbhUTBld5M9MWkQr8hD8xWs6k21bxE61YTJGG0k7jKwWntjubXjCcJN If1PT6y18djYE6cb2nFXkxKvc33DM/lLPuVkwO5b7+nfWbLBI9ar0HcEF /cQmSGXeRRjBzv5fybldDQHafntyIfKEmU/n8DeGGWkFsMiQ/rzTzW+W8 9MYxaqeA7F6+BL9MRJKY9FWjAt0eqLYw4yhE/L61YPypKrwk9DndjGV13 lI6yyQD5uULGi0X1bcoay6OV0t7pnCD+QY7aKB9VH1nT5yqLrWyb/kMUG g==; X-CSE-ConnectionGUID: E5CfgM7CQH23y/CaAlNTSA== X-CSE-MsgGUID: loGfHvF6TUyUKha8c4Fk5A== X-IronPort-AV: E=McAfee;i="6800,10657,11741"; a="79565666" X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="79565666" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 09:24:05 -0700 X-CSE-ConnectionGUID: uPp5MI4jQcKo/WTcMstNsw== X-CSE-MsgGUID: fmhf5p5NSIGthkwPzkRFIw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="220516357" Received: from yilunxu-optiplex-7050.sh.intel.com ([10.239.159.165]) by fmviesa006.fm.intel.com with ESMTP; 27 Mar 2026 09:24:02 -0700 From: Xu Yilun To: linux-coco@lists.linux.dev, linux-pci@vger.kernel.org, dan.j.williams@intel.com, x86@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, kas@kernel.org, xiaoyao.li@intel.com, vishal.l.verma@intel.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 25/31] x86/virt/tdx: Add SEAMCALL wrappers for SPDM management Date: Sat, 28 Mar 2026 00:01:26 +0800 Message-Id: <20260327160132.2946114-26-yilun.xu@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260327160132.2946114-1-yilun.xu@linux.intel.com> References: <20260327160132.2946114-1-yilun.xu@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Zhenzhong Duan Add several SEAMCALL wrappers for SPDM management. TDX Module requires HPA_ARRAY_T structure as input/output parameters for these SEAMCALLs. So use tdx_page_array for these wrappers. - TDH.SPDM.CREATE creates SPDM session metadata buffers for TDX Module. - TDH.SPDM.DELETE destroys SPDM session metadata and returns these buffers to host, after checking no reference attached to the metadata. - TDH.SPDM.CONNECT establishes a new SPDM session with the device. - TDH.SPDM.DISCONNECT tears down the SPDM session with the device. - TDH.SPDM.MNG supports three SPDM runtime operations: HEARTBEAT, KEY_UPDATE and DEV_INFO_RECOLLECTION. Co-developed-by: Xu Yilun Signed-off-by: Xu Yilun Signed-off-by: Zhenzhong Duan --- arch/x86/include/asm/tdx.h | 13 ++++ arch/x86/virt/vmx/tdx/tdx.h | 5 ++ arch/x86/virt/vmx/tdx/tdx.c | 114 +++++++++++++++++++++++++++++++++++- 3 files changed, 130 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h index a59e0e43e465..8abdad084972 100644 --- a/arch/x86/include/asm/tdx.h +++ b/arch/x86/include/asm/tdx.h @@ -247,6 +247,19 @@ u64 tdh_phymem_page_wbinvd_tdr(struct tdx_td *td); u64 tdh_phymem_page_wbinvd_hkid(u64 hkid, struct page *page); u64 tdh_iommu_setup(u64 vtbar, struct tdx_page_array *iommu_mt, u64 *iommu= _id); u64 tdh_iommu_clear(u64 iommu_id, struct tdx_page_array *iommu_mt); +u64 tdh_spdm_create(u64 func_id, struct tdx_page_array *spdm_mt, u64 *spdm= _id); +u64 tdh_spdm_delete(u64 spdm_id, struct tdx_page_array *spdm_mt, + unsigned int *nr_released, u64 *released_hpa); +u64 tdh_exec_spdm_connect(u64 spdm_id, struct page *spdm_conf, + struct page *spdm_rsp, struct page *spdm_req, + struct tdx_page_array *spdm_out, + u64 *spdm_req_or_out_len); +u64 tdh_exec_spdm_disconnect(u64 spdm_id, struct page *spdm_rsp, + struct page *spdm_req, u64 *spdm_req_len); +u64 tdh_exec_spdm_mng(u64 spdm_id, u64 spdm_op, struct page *spdm_param, + struct page *spdm_rsp, struct page *spdm_req, + struct tdx_page_array *spdm_out, + u64 *spdm_req_or_out_len); #else static inline void tdx_init(void) { } static inline int tdx_cpu_enable(void) { return -ENODEV; } diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h index b25c418f6e61..4784db2d1d92 100644 --- a/arch/x86/virt/vmx/tdx/tdx.h +++ b/arch/x86/virt/vmx/tdx/tdx.h @@ -64,6 +64,11 @@ #define TDH_EXT_MEM_ADD 61 #define TDH_IOMMU_SETUP 128 #define TDH_IOMMU_CLEAR 129 +#define TDH_SPDM_CREATE 130 +#define TDH_SPDM_DELETE 131 +#define TDH_SPDM_CONNECT 142 +#define TDH_SPDM_DISCONNECT 143 +#define TDH_SPDM_MNG 144 =20 /* TDX page types */ #define PT_NDA 0x0 diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index 790713881f1f..02882c2ad177 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -654,7 +654,7 @@ static u64 hpa_list_info_assign_raw(struct tdx_page_arr= ay *array) #define HPA_ARRAY_T_PFN GENMASK_U64(51, 12) #define HPA_ARRAY_T_SIZE GENMASK_U64(63, 55) =20 -static u64 __maybe_unused hpa_array_t_assign_raw(struct tdx_page_array *ar= ray) +static u64 hpa_array_t_assign_raw(struct tdx_page_array *array) { unsigned long pfn; =20 @@ -667,7 +667,7 @@ static u64 __maybe_unused hpa_array_t_assign_raw(struct= tdx_page_array *array) FIELD_PREP(HPA_ARRAY_T_SIZE, array->nents - 1); } =20 -static u64 __maybe_unused hpa_array_t_release_raw(struct tdx_page_array *a= rray) +static u64 hpa_array_t_release_raw(struct tdx_page_array *array) { if (array->nents =3D=3D 1) return 0; @@ -2107,6 +2107,15 @@ static u64 __seamcall_ir_resched(sc_func_t sc_func, = u64 fn, #define seamcall_ret_ir_resched(fn, args) \ __seamcall_ir_resched(__seamcall_ret, fn, args) =20 +/* + * seamcall_ret_ir_exec() aliases seamcall_ret_ir_resched() for + * documentation purposes. It documents the TDX Module extension + * seamcalls that are long running / hard-irq preemptible flows that + * generate events. The calls using seamcall_ret_ir_resched() are long + * running flows, that periodically yield. + */ +#define seamcall_ret_ir_exec seamcall_ret_ir_resched + noinstr u64 tdh_vp_enter(struct tdx_vp *td, struct tdx_module_args *args) { args->rcx =3D td->tdvpr_pa; @@ -2506,3 +2515,104 @@ u64 tdh_iommu_clear(u64 iommu_id, struct tdx_page_a= rray *iommu_mt) return seamcall_ret_ir_resched(TDH_IOMMU_CLEAR, &args); } EXPORT_SYMBOL_FOR_MODULES(tdh_iommu_clear, "tdx-host"); + +u64 tdh_spdm_create(u64 func_id, struct tdx_page_array *spdm_mt, u64 *spdm= _id) +{ + struct tdx_module_args args =3D { + .rcx =3D func_id, + .rdx =3D hpa_array_t_assign_raw(spdm_mt) + }; + u64 r; + + tdx_clflush_page_array(spdm_mt); + + r =3D seamcall_ret(TDH_SPDM_CREATE, &args); + + *spdm_id =3D args.rcx; + + return r; +} +EXPORT_SYMBOL_FOR_MODULES(tdh_spdm_create, "tdx-host"); + +u64 tdh_spdm_delete(u64 spdm_id, struct tdx_page_array *spdm_mt, + unsigned int *nr_released, u64 *released_hpa) +{ + struct tdx_module_args args =3D { + .rcx =3D spdm_id, + .rdx =3D hpa_array_t_release_raw(spdm_mt), + }; + u64 r; + + r =3D seamcall_ret(TDH_SPDM_DELETE, &args); + if (r !=3D TDX_SUCCESS) + return r; + + *nr_released =3D FIELD_GET(HPA_ARRAY_T_SIZE, args.rcx) + 1; + *released_hpa =3D FIELD_GET(HPA_ARRAY_T_PFN, args.rcx) << PAGE_SHIFT; + + return r; +} +EXPORT_SYMBOL_FOR_MODULES(tdh_spdm_delete, "tdx-host"); + +u64 tdh_exec_spdm_connect(u64 spdm_id, struct page *spdm_conf, + struct page *spdm_rsp, struct page *spdm_req, + struct tdx_page_array *spdm_out, + u64 *spdm_req_or_out_len) +{ + struct tdx_module_args args =3D { + .rcx =3D spdm_id, + .rdx =3D page_to_phys(spdm_conf), + .r8 =3D page_to_phys(spdm_rsp), + .r9 =3D page_to_phys(spdm_req), + .r10 =3D hpa_array_t_assign_raw(spdm_out), + }; + u64 r; + + r =3D seamcall_ret_ir_exec(TDH_SPDM_CONNECT, &args); + + *spdm_req_or_out_len =3D args.rcx; + + return r; +} +EXPORT_SYMBOL_FOR_MODULES(tdh_exec_spdm_connect, "tdx-host"); + +u64 tdh_exec_spdm_disconnect(u64 spdm_id, struct page *spdm_rsp, + struct page *spdm_req, u64 *spdm_req_len) +{ + struct tdx_module_args args =3D { + .rcx =3D spdm_id, + .rdx =3D page_to_phys(spdm_rsp), + .r8 =3D page_to_phys(spdm_req), + }; + u64 r; + + r =3D seamcall_ret_ir_exec(TDH_SPDM_DISCONNECT, &args); + + *spdm_req_len =3D args.rcx; + + return r; +} +EXPORT_SYMBOL_FOR_MODULES(tdh_exec_spdm_disconnect, "tdx-host"); + +u64 tdh_exec_spdm_mng(u64 spdm_id, u64 spdm_op, struct page *spdm_param, + struct page *spdm_rsp, struct page *spdm_req, + struct tdx_page_array *spdm_out, + u64 *spdm_req_or_out_len) +{ + struct tdx_module_args args =3D { + .rcx =3D spdm_id, + .rdx =3D spdm_op, + .r8 =3D spdm_param ? page_to_phys(spdm_param) : -1, + .r9 =3D page_to_phys(spdm_rsp), + .r10 =3D page_to_phys(spdm_req), + .r11 =3D spdm_out ? hpa_array_t_assign_raw(spdm_out) : -1, + }; + u64 r; + + r =3D seamcall_ret_ir_exec(TDH_SPDM_MNG, &args); + + *spdm_req_or_out_len =3D args.rcx; + + return r; +} +EXPORT_SYMBOL_FOR_MODULES(tdh_exec_spdm_mng, "tdx-host"); --=20 2.25.1