From nobody Tue Nov 26 19:48:06 2024 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=1705941479; cv=none; d=zohomail.com; s=zohoarc; b=O25+vm7djIzvK46YogrFfgZGR1AamysAcnuhmzO/Xc4C7Y6fAIp47k2o3Cka9MAmqMgnVvrmbqiU5JfCOf16K8CLTmhIJ5OyI6bn23OR4uMyQaQDAPp3ZIgnO3qE48O3LwAJ43o7tMnFz1CvEaNsfWkbPXSCabkOkqB6LuNTUj4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1705941479; 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=zbnfC/D4PDNYwfVyZ7HdEI62GO35WnzElpqTdsyXzQU=; b=OroZJvplGtYdk6kU4XuC8Xxw2aNmn75pzX35qVQf1VVoSD22L4+5zrSR913/WsjEJS4Bp9d72r4D/CvaP/nYdZjOHxDcexiJlKeG+MiL8Wd71uaWgPg7Tqwd/DY/UwqcWFrwis5UFZr8M8YievZs2RmS/NVlgd0TTBcHESFLMxk= 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 1705941479825457.0826917574474; Mon, 22 Jan 2024 08:37:59 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rRxHz-0004Dx-Op; Mon, 22 Jan 2024 11:36:47 -0500 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 1rRxHW-00048h-Ha for qemu-devel@nongnu.org; Mon, 22 Jan 2024 11:36:20 -0500 Received: from mail-wr1-x42c.google.com ([2a00:1450:4864:20::42c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rRxHQ-0001hN-Mm for qemu-devel@nongnu.org; Mon, 22 Jan 2024 11:36:16 -0500 Received: by mail-wr1-x42c.google.com with SMTP id ffacd0b85a97d-337cc8e72f5so3111806f8f.1 for ; Mon, 22 Jan 2024 08:36:11 -0800 (PST) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id e15-20020a5d530f000000b003391720fa51sm9188728wrv.60.2024.01.22.08.36.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jan 2024 08:36:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1705941370; x=1706546170; 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=zbnfC/D4PDNYwfVyZ7HdEI62GO35WnzElpqTdsyXzQU=; b=aX96wJ11TghmOeWa23BuzcsZG5wB6tO9hujD/cd/30F+dPCK0Ns2DwQGE/lGaEG4+l kF5hQuae9BYmmBNEBjS3nav7aRU+TK9LFR3qhf0NWXRsj9H0DepRgZ1izZMSPokPV0FK C84iaPDCDxbCrSs9vJ5b6XxhtN50xR0u13Ht3tlNbPVo/K+kO8z/NIzQT47FT61SQhxy SGeEoOnHEIqdJnVzJCJnnLiAajb31UqizqqUB1ovXQz/NmGUxg+xrYbHrDRY48tWnyTD 5hkjt/KGGppLgGOpNAGbZrwncisWVEzV5c4JQrw86+NsNOb5gsbSO9z46vGVlNvnPK6H ZsDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1705941370; x=1706546170; 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=zbnfC/D4PDNYwfVyZ7HdEI62GO35WnzElpqTdsyXzQU=; b=oQUDw44MQuW1PvRIiZqbbAd8RhkYL6Fb9/QT4HdXtF7GDF0IUVvfBbTAqKr4tr28FG knHYs47Epq5c+ZYRGThInYKJZE9WUwUEl/6cVuAvFWLED+mAGtudFkP7Z6x2NnrB6C0x IOZcjUDDlhpl5jMY5jRO1QV1KBAiUUj/HuAWNXlhdmKem7ZR0jBGGzIG39ojsdgozGPP ffLXxHHMkWleZA7BSioSio4ZyX5X3K39OGbbTZaSpcglTzE/ctyH7uczmcpF2vtbMgis T+2a4YcpeV1R6LOT/Tt+qfse+h1p0xHMQ27sjKhdwuB9WeHzy90bCxdA6ghsxD1s+yEZ +aAQ== X-Gm-Message-State: AOJu0YwwEru7Cb6x5aTg53gazp8czrH95yWt8f7n7JBAFk0RgczFjjzo T+3vZDohmgjTaIluA9P9e9UfZRVC287hIt/oFf8wXDLnmnVibXQDa5kPNDrUW2mbNF4L54+GsxY k X-Google-Smtp-Source: AGHT+IEknpqVv/fPdvkFaA8i5zohf5niL3IusPQMpiF0Tz2BpJmzZzL1s35IpZUEmiuJ7zIx9Xw/Hg== X-Received: by 2002:a05:6000:d88:b0:337:b9ac:97f6 with SMTP id dv8-20020a0560000d8800b00337b9ac97f6mr2393941wrb.55.1705941369834; Mon, 22 Jan 2024 08:36:09 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Bohdan Kostiv , Markus Armbruster , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Subject: [PATCH 1/2] system/vl.c: Fix handling of '-serial none -serial something' Date: Mon, 22 Jan 2024 16:36:06 +0000 Message-Id: <20240122163607.459769-2-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240122163607.459769-1-peter.maydell@linaro.org> References: <20240122163607.459769-1-peter.maydell@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=2a00:1450:4864:20::42c; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42c.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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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: 1705941481775100003 Content-Type: text/plain; charset="utf-8" Currently if the user passes multiple -serial options on the command line, we mostly treat those as applying to the different serial devices in order, so that for example -serial stdio -serial file:filename will connect the first serial port to stdio and the second to the named file. The exception to this is the '-serial none' serial device type. This means "don't allocate this serial device", but a bug means that following -serial options are not correctly handled, so that -serial none -serial stdio has the unexpected effect that stdio is connected to the first serial port, not the second. This is a very long-standing bug that dates back at least as far as commit 998bbd74b9d81 from 2009. Make the 'none' serial type move forward in the indexing of serial devices like all the other serial types, so that any subsequent -serial options are correctly handled. Note that if your commandline mistakenly had a '-serial none' that was being overridden by a following '-serial something' option, you should delete the unnecessary '-serial none'. This will give you the same behaviour as before, on QEMU versions both with and without this bug fix. Cc: qemu-stable@nongnu.org Reported-by: Bohdan Kostiv Fixes: 998bbd74b9d81 ("default devices: core code & serial lines") Signed-off-by: Peter Maydell Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Richard Henderson --- See the discussion of Bohdan's patch on the mailing list for further context: https://lore.kernel.org/qemu-devel/CAA3Sv1LQ8yDUNLCB5WqLVZjsHffrU0uSbL_YYJW= _m+Db2PhEeQ@mail.gmail.com/ --- system/vl.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/system/vl.c b/system/vl.c index 788d88ea03a..aa7953bdd7d 100644 --- a/system/vl.c +++ b/system/vl.c @@ -1439,18 +1439,22 @@ static void qemu_create_default_devices(void) static int serial_parse(const char *devname) { int index =3D num_serial_hds; - char label[32]; =20 - if (strcmp(devname, "none") =3D=3D 0) - return 0; - snprintf(label, sizeof(label), "serial%d", index); serial_hds =3D g_renew(Chardev *, serial_hds, index + 1); =20 - serial_hds[index] =3D qemu_chr_new_mux_mon(label, devname, NULL); - if (!serial_hds[index]) { - error_report("could not connect serial device" - " to character backend '%s'", devname); - return -1; + if (strcmp(devname, "none") =3D=3D 0) { + /* Don't allocate a serial device for this index */ + serial_hds[index] =3D NULL; + } else { + char label[32]; + snprintf(label, sizeof(label), "serial%d", index); + + serial_hds[index] =3D qemu_chr_new_mux_mon(label, devname, NULL); + if (!serial_hds[index]) { + error_report("could not connect serial device" + " to character backend '%s'", devname); + return -1; + } } num_serial_hds++; return 0; --=20 2.34.1