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GET /api/1.2/patches/2225806/?format=api
{ "id": 2225806, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2225806/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/800e4e5b-b41e-c8b8-1bef-57159952bd87@e124511.cambridge.arm.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.2/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<800e4e5b-b41e-c8b8-1bef-57159952bd87@e124511.cambridge.arm.com>", "list_archive_url": null, "date": "2026-04-21T15:59:54", "name": "[v2,5/6] aarch64: Extend comment about saving/restoring zt0", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "923e3c2db653893174aaf1977c33e63534de7e89", "submitter": { "id": 90594, "url": "http://patchwork.ozlabs.org/api/1.2/people/90594/?format=api", "name": "Alice Carlotti", "email": "alice.carlotti@arm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/800e4e5b-b41e-c8b8-1bef-57159952bd87@e124511.cambridge.arm.com/mbox/", "series": [ { "id": 500843, "url": "http://patchwork.ozlabs.org/api/1.2/series/500843/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500843", "date": "2026-04-21T15:57:04", "name": "aarch64: SME ZA/ZT0 fixes", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/500843/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225806/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225806/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=selector1 header.b=rukHcuv3;\n\tdkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com\n header.a=rsa-sha256 header.s=selector1 header.b=rukHcuv3;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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dkim=pass (signature was verified)\n header.d=arm.com;dmarc=pass action=none header.from=arm.com;", "Received-SPF": "Pass (protection.outlook.com: domain of arm.com designates\n 4.158.2.129 as permitted sender) receiver=protection.outlook.com;\n client-ip=4.158.2.129; helo=outbound-uk1.az.dlp.m.darktrace.com; pr=C", "Authentication-Results-Original": "dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=arm.com;", "Date": "Tue, 21 Apr 2026 16:59:54 +0100", "From": "Alice Carlotti <alice.carlotti@arm.com>", "To": "gcc-patches@gcc.gnu.org", "Cc": "Richard Sandiford <richard.sandiford@arm.com>,\n Richard Earnshaw <richard.earnshaw@arm.com>,\n Tamar Christina <tamar.christina@arm.com>,\n Kyrylo Tkachov <ktkachov@nvidia.com>, Alex Coplan <alex.coplan@arm.com>,\n Andrew Pinski <andrew.pinski@oss.qualcomm.com>,\n Wilco Dijkstra <wilco.dijkstra@arm.com>", "Subject": "[PATCH v2 5/6] aarch64: Extend comment about saving/restoring zt0", "Message-ID": "<800e4e5b-b41e-c8b8-1bef-57159952bd87@e124511.cambridge.arm.com>", "References": "<9587777e-dc1e-51c2-0c33-d1192dfc568d@e124511.cambridge.arm.com>", "Content-Type": "text/plain; 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Ip=[4.158.2.129];\n Helo=[outbound-uk1.az.dlp.m.darktrace.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n AM4PEPF00025F98.EURPRD83.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "Explain why aarch64_start_call_args only needs to save and restore zt0\nif the callee shares ZA state.\n\ngcc/ChangeLog:\n\n\t* config/aarch64/aarch64.cc (aarch64_start_call_args): Extend\n\tcomment.", "diff": "diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc\nindex 8c75e4d396feb83cfe7832256023d33490a6e3c2..f6e070da126a8677d70f3e9a85b7dffb714ce67f 100644\n--- a/gcc/config/aarch64/aarch64.cc\n+++ b/gcc/config/aarch64/aarch64.cc\n@@ -12212,7 +12212,8 @@ aarch64_start_call_args (cumulative_args_t ca_v)\n emit_insn (gen_aarch64_start_private_za_call ());\n \n /* If this is a call to a shared-ZA function that doesn't share ZT0,\n- save and restore ZT0 around the call. */\n+ save and restore ZT0 around the call. If ZA is not shared, then the\n+ save/restore is instead emitted by aarch64_mode_emit_local_sme_state. */\n if (aarch64_cfun_has_state (\"zt0\")\n && (ca->isa_mode & AARCH64_ISA_MODE_ZA_ON)\n && ca->shared_zt0_flags == 0)\n", "prefixes": [ "v2", "5/6" ] }