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GET /api/patches/2217067/?format=api
{ "id": 2217067, "url": "http://patchwork.ozlabs.org/api/patches/2217067/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260327160132.2946114-21-yilun.xu@linux.intel.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260327160132.2946114-21-yilun.xu@linux.intel.com>", "list_archive_url": null, "date": "2026-03-27T16:01:21", "name": "[v2,20/31] x86/virt/tdx: Add a helper to loop on TDX_INTERRUPTED_RESUMABLE", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "475b6995f3f7b543638ab3108463d6d2a8e95fca", "submitter": { "id": 87470, "url": "http://patchwork.ozlabs.org/api/people/87470/?format=api", "name": "Xu Yilun", "email": "yilun.xu@linux.intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260327160132.2946114-21-yilun.xu@linux.intel.com/mbox/", "series": [ { "id": 497793, "url": "http://patchwork.ozlabs.org/api/series/497793/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=497793", "date": "2026-03-27T16:01:02", "name": "PCI/TSM: PCIe Link Encryption Establishment via TDX platform services", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/497793/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217067/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217067/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-51306-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256\n header.s=Intel header.b=lCsZM/kr;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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a=\"79565638\"", "E=Sophos;i=\"6.23,144,1770624000\";\n d=\"scan'208\";a=\"79565638\"", "E=Sophos;i=\"6.23,144,1770624000\";\n d=\"scan'208\";a=\"220516321\"" ], "X-ExtLoop1": "1", "From": "Xu Yilun <yilun.xu@linux.intel.com>", "To": "linux-coco@lists.linux.dev,\n\tlinux-pci@vger.kernel.org,\n\tdan.j.williams@intel.com,\n\tx86@kernel.org", "Cc": "chao.gao@intel.com,\n\tdave.jiang@intel.com,\n\tbaolu.lu@linux.intel.com,\n\tyilun.xu@linux.intel.com,\n\tyilun.xu@intel.com,\n\tzhenzhong.duan@intel.com,\n\tkvm@vger.kernel.org,\n\trick.p.edgecombe@intel.com,\n\tdave.hansen@linux.intel.com,\n\tkas@kernel.org,\n\txiaoyao.li@intel.com,\n\tvishal.l.verma@intel.com,\n\tlinux-kernel@vger.kernel.org", "Subject": "[PATCH v2 20/31] x86/virt/tdx: Add a helper to loop on\n TDX_INTERRUPTED_RESUMABLE", "Date": "Sat, 28 Mar 2026 00:01:21 +0800", "Message-Id": "<20260327160132.2946114-21-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-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit" }, "content": "Add a helper to handle SEAMCALL return code TDX_INTERRUPTED_RESUMABLE.\n\nSEAMCALL returns TDX_INTERRUPTED_RESUMABLE to avoid stalling host for\nlong time. After host has handled the interrupt, it calls the\ninterrupted SEAMCALL again and TDX Module continues to execute. TDX\nModule made progress in this case and would eventually finish. An\ninfinite loop in host should be safe.\n\nThe helper is for SEAMCALL wrappers which output information by using\nseamcall_ret() or seamcall_saved_ret(). The 2 functions overwrite input\narguments by outputs but much SEAMCALLs expect the same inputs to\nresume.\n\nThe helper is not for special cases where the SEAMCALL expects modified\ninputs to resume. The helper is also not for SEAMCALLs with no output,\ndo {...} while (r == TDX_INTERRUPTED_RESUMABLE) just works.\n\nSigned-off-by: Xu Yilun <yilun.xu@linux.intel.com>\n---\n arch/x86/virt/vmx/tdx/tdx.c | 23 +++++++++++++++++++++++\n 1 file changed, 23 insertions(+)", "diff": "diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c\nindex cd0948794b6c..294f36048c03 100644\n--- a/arch/x86/virt/vmx/tdx/tdx.c\n+++ b/arch/x86/virt/vmx/tdx/tdx.c\n@@ -2084,6 +2084,29 @@ static inline u64 tdx_tdr_pa(struct tdx_td *td)\n \treturn page_to_phys(td->tdr_page);\n }\n \n+static u64 __maybe_unused __seamcall_ir_resched(sc_func_t sc_func, u64 fn,\n+\t\t\t\t\t\tstruct tdx_module_args *args)\n+{\n+\tstruct tdx_module_args _args;\n+\tu64 r;\n+\n+\twhile (1) {\n+\t\t_args = *(args);\n+\t\tr = sc_retry(sc_func, fn, &_args);\n+\t\tif (r != TDX_INTERRUPTED_RESUMABLE)\n+\t\t\tbreak;\n+\n+\t\tcond_resched();\n+\t}\n+\n+\t*args = _args;\n+\n+\treturn r;\n+}\n+\n+#define seamcall_ret_ir_resched(fn, args)\t\\\n+\t__seamcall_ir_resched(__seamcall_ret, fn, args)\n+\n noinstr u64 tdh_vp_enter(struct tdx_vp *td, struct tdx_module_args *args)\n {\n \targs->rcx = td->tdvpr_pa;\n", "prefixes": [ "v2", "20/31" ] }