From nobody Mon Sep 8 12:49:49 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1756573588; cv=none; d=zohomail.com; s=zohoarc; b=G7qW27waevFCGkQX1z7QHZdDEWaWIvy68//RIS66vV3H+Zu9rOECjSgmhn0XYmFwrbiSPrOpMji3h8zyMVvxJy2U59JSpBNJZesR3adoGiycp2qhsvGYNcEWBt1ja8yHZ0bHBAUHZC4OUpWlmqNk90YDr10OSliBvovhJkAO4eE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1756573588; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=RrRDTwGDphkvvBtsV/mK2pHDoMT9L4tWZDtSjWVgm+E=; b=cSfaBO78PVMbYRJo4L/iX/sljgYpVwYncEKyTUkUCbJOvm1oWOchksAPnWZTkI6S3kHTBo93VpqWH9uaMMcs1rr0mfK1S2wmJqcYmoCjfcLFqQPH9bceRQHklbtpT8AI6dmWiczEjlFwpKHCQti/stLvuB7IJvEgToGXbM+8/Rs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1756573588704517.090466233021; Sat, 30 Aug 2025 10:06:28 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1usO02-0000oZ-J9; Sat, 30 Aug 2025 12:00:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1usERg-0007Zf-VL for qemu-devel@nongnu.org; Sat, 30 Aug 2025 01:48:14 -0400 Received: from mail-pl1-x629.google.com ([2607:f8b0:4864:20::629]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1usERd-00053P-Hg for qemu-devel@nongnu.org; Sat, 30 Aug 2025 01:48:12 -0400 Received: by mail-pl1-x629.google.com with SMTP id d9443c01a7336-248cb0b37dfso26143035ad.3 for ; Fri, 29 Aug 2025 22:48:07 -0700 (PDT) Received: from stoup.. (122-150-204-179.dyn.ip.vocus.au. [122.150.204.179]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2490658999fsm40852715ad.112.2025.08.29.22.48.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Aug 2025 22:48:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1756532887; x=1757137687; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=RrRDTwGDphkvvBtsV/mK2pHDoMT9L4tWZDtSjWVgm+E=; b=VODi5qWzHCHWrXyl5SvBraebE+RtyxsvCJmkYPsDbFDT5O+fNOrZvdZDhgDi6cvbX8 ZtuvOXm647teiUaM2pyEKSnwXHQXc/+79tO4nKDHHgiDvnDfTieQVnoUi9gUmga+R+aq 182YB8rQzm0f8XBHCIOKbWG6CK9gEoGtiHo/Dxb8yYKGh0TtrVH3ssv9u4Dq0f6tbr5Y vExFJ//z+aM7/B/49zjhSiZmnByaR9+VBU/HUBjqLs0QZcN+5hBTokEMSfNY26Y4NbBW 5kX/YVtuDD+h6bANfbVHbAhIvVt8jYFpCoXpLed/+6Ml8s2zoCR5QSvqtdkuXl9+CTmw E0qw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756532887; x=1757137687; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=RrRDTwGDphkvvBtsV/mK2pHDoMT9L4tWZDtSjWVgm+E=; b=ky8y+NYHAYIiD27VyvoLtFVgPlxI7twGQsbxgz4uP6mocm5SbLHmqDNiJBN6sYxMx3 OJJww5nR2Tnj2a332h8JuN9SMyUU5OTI9zTzXz8WsOmTrcMwPqoHrRbJHDx+F80zqi5/ Hjnbgtzv7kna/DH2MKi6nfJBgVuqkUHp8JaQDojG3OezmNOwkYmTk6iPjdGxn4lUCaQ2 WX7XS7WJG6C3NfBoSLbq4LXpBR8BuTSmuCW0bec+yonHa/Ehc/gW64zJNGTuKO89YiCx 75TjJRWP/jjnpEkgcbUevAf1HNO56laKW63rmp/rvRZghPNIrRKVP1thXx4I1oGM3i6z xhhA== X-Gm-Message-State: AOJu0YzhjNJzFVD9HumbeZy9IPL8xt2FEop7Hrdf1PNqe89u+6ecaiyt yiidDN70aoJXlstLgOIDngEOSpMN772HXIWDUiBe42NnTAZj03xjHpOcsQiJNjt/6zCbNh0qUl9 HaHacWtg= X-Gm-Gg: ASbGncvrRhFfEX5k+1TqqC/TBiJHCjIS3YncYahsTq/F+VVzVN5t4CltDqeJRQ/Atq1 6SjUpVxoapGCp49WASWzHSJHxnJlQHoEQ+FZwl/ldkzo0pXoGo/uza92IkWS5LFlYX/iVoX5qru Rm4sv7JdntTFK6Ge2+nvAXRkLFiHc6SwFJjpJGiOtbX+NZL/F4j95ImNZiiuk8IODoUd3FXrfu1 1P/pAMN2D7TPn+nnhbZV3yB1Px5Blan8gX05tsKUaMCeOwEcfZlU7rzuV7XgNCzAEu8rwf417If PHQoIW49IDJ2RC0rrxN5ixuasA20PD2/6qdAfv513RvyUnGxOeF63PHrcIkGg7mDLWS6ObW9aGc pf2lzrZXcgs3XGcO7LMDlb6Rhb+RQzaUUiEpuz+MrVOabZuFsLgnkXYhkBeP4IhA= X-Google-Smtp-Source: AGHT+IGoHCdK1kauU9bmFRl/SqKDamGWvYyD6nzAwFXTX6HBF0hItUjUJFLxIVqbU97cHLuXO7nYfA== X-Received: by 2002:a17:902:ce02:b0:246:a42b:a31d with SMTP id d9443c01a7336-24944ad758dmr13747515ad.44.1756532886866; Fri, 29 Aug 2025 22:48:06 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Pierrick Bouvier Subject: [PATCH v4 75/84] linux-user/aarch64: Allocate new gcs stack on clone Date: Sat, 30 Aug 2025 15:41:19 +1000 Message-ID: <20250830054128.448363-76-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250830054128.448363-1-richard.henderson@linaro.org> References: <20250830054128.448363-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::629; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x629.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1756573590659124100 Content-Type: text/plain; charset="utf-8" Allocate the new stack early, so that error reporting need not clean up other objects. Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- linux-user/syscall.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 2f1e881046..91210775ed 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6652,6 +6652,21 @@ static int do_fork(CPUArchState *env, unsigned int f= lags, abi_ulong newsp, ts =3D g_new0(TaskState, 1); init_task_state(ts); =20 +#ifdef TARGET_AARCH64 + /* + * If GCS is enabled in the parent thread, it is also enabled + * in the child thread, but with a newly allocated stack. + */ + abi_long new_gcspr =3D 0; + if (env->cp15.gcscr_el[0] & GCSCR_PCRSEL) { + new_gcspr =3D gcs_new_stack(ts); + if (new_gcspr =3D=3D -1) { + g_free(ts); + return -TARGET_ENOMEM; + } + } +#endif + /* Grab a mutex so that thread setup appears atomic. */ pthread_mutex_lock(&clone_lock); =20 @@ -6676,6 +6691,11 @@ static int do_fork(CPUArchState *env, unsigned int f= lags, abi_ulong newsp, ts->info =3D parent_ts->info; ts->signal_mask =3D parent_ts->signal_mask; =20 +#ifdef TARGET_AARCH64 + ts->gcs_el0_locked =3D parent_ts->gcs_el0_locked; + new_env->cp15.gcspr_el[0] =3D new_gcspr; +#endif + if (flags & CLONE_CHILD_CLEARTID) { ts->child_tidptr =3D child_tidptr; } --=20 2.43.0