From patchwork Tue Jan 31 16:55:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1734969 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20210112 header.b=GvyuAwIE; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4P5rmB1MM3z1yhq for ; Wed, 1 Feb 2023 03:56:10 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4P5rmB0LH7z3cg0 for ; Wed, 1 Feb 2023 03:56:10 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20210112 header.b=GvyuAwIE; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::62d; helo=mail-pl1-x62d.google.com; envelope-from=npiggin@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20210112 header.b=GvyuAwIE; dkim-atps=neutral Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4P5rln6xCHz3bW2 for ; Wed, 1 Feb 2023 03:55:48 +1100 (AEDT) Received: by mail-pl1-x62d.google.com with SMTP id k13so15764381plg.0 for ; Tue, 31 Jan 2023 08:55:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=vnlVaRgsae3nqVZuJIAVJLLNiUe7NfzgzUJTWm08nRs=; b=GvyuAwIEjOByHmmBVKf4dIz1HFngrLxwisUIOr6Ofax3/aPM+bKNPZOKXhqe9/UiiM fTvKeqhD1j9lSU6S+qpfVF/w0F+Uh6o0Ps02UAQlK+lv5jhuu7kO4WjppCiek8NXMTnt xi8J/xdVi4mf3ozWZJkUNkF+1/P/LqDajBAXqlpS6uxV2fC+YMgKP6PZbIwfMQhKvQ5T 8PttI0JmAhMX2xadHE9MFciPKHP4lJxdDKU+6Qdq1H44iulK4o0pSWUIIosVbj6ZeF5J N/UYfoVnxx8n9ih1X76HVnJSzC+iNYMI/r6HsxJAPrtqH3w4THefj6HU+kLRhy/RMoel RxqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=vnlVaRgsae3nqVZuJIAVJLLNiUe7NfzgzUJTWm08nRs=; b=1rHgKOjsmY7xr4eUqO8/LA+Yg+dBr/Bh4T6L9jeSTVtLkqQCKs4PfsBtYzE3aRyVXT ljnlHHItDKBxsLlQ9ITQA3tA5Cxxa7G7LU7NuaHLEThIsTvx/5dgOSKyKJUlzu9uFsjh oxEb9Y9BuvDc4dZKGJ+okVP02gPebTIuehoXH0JSDer96WWIuybHjmXbpAIKFn5NUlSW OUcjWxClCSVVVdTW0waoa18GSh5QMs0J2oUi1hA9HXVD4rb8iuToNTr9QzPVRpJfGq5k Z1HijVjnYLKo1pct5XhfaVD1gTpTp0hcj5l3VCB6lUrKMiMXII1vhEHQPvzWlqPt6BNd sYFw== X-Gm-Message-State: AFqh2koz460Kys5aBD4rpxftf3JvrbP1TUjA12TfIIcWMCMnMHMD2Pbk H7oM5ZxUcBtipIaye/K7+1KBKEp2DX0= X-Google-Smtp-Source: AMrXdXtCX5B7p5HXJ5SCnqbI6aQO3yLEYKdKPV8qhyYtRq1uvn6dy9B052cfV8kkQSMCAT2CCXhdUg== X-Received: by 2002:a17:90a:528e:b0:229:eae4:bef9 with SMTP id w14-20020a17090a528e00b00229eae4bef9mr46149902pjh.43.1675184142206; Tue, 31 Jan 2023 08:55:42 -0800 (PST) Received: from bobo.ozlabs.ibm.com ([203.194.37.234]) by smtp.gmail.com with ESMTPSA id bk7-20020a17090b080700b00223f495dc28sm9029371pjb.14.2023.01.31.08.55.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Jan 2023 08:55:41 -0800 (PST) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 0/8] powerpc: improve copy_thread Date: Wed, 1 Feb 2023 02:55:26 +1000 Message-Id: <20230131165534.601490-1-npiggin@gmail.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The way copy_thread works, particularly with kernel threads and kernel created user threads is a bit muddled and confusing. This series tries to straighten things out a bit. Thanks, Nick Nicholas Piggin (8): powerpc: copy_thread remove unused pkey code powerpc: copy_thread make ret_from_fork register setup consistent powerpc: use switch frame for ret_from_kernel_thread parameters powerpc/64: ret_from_fork avoid restoring regs twice powerpc: copy_thread differentiate kthreads and user mode threads powerpc: differentiate kthread from user kernel thread start powerpc: copy_thread don't set _TIF_RESTOREALL powerpc: copy_thread don't set ppr in user interrupt frame regs arch/powerpc/kernel/entry_32.S | 23 +++++- arch/powerpc/kernel/interrupt_64.S | 28 ++++++- arch/powerpc/kernel/process.c | 121 ++++++++++++++++------------- 3 files changed, 110 insertions(+), 62 deletions(-)