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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id k2-20020a05600c1c8200b0040fafd84095sm214735wms.41.2024.02.02.07.36.41 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Feb 2024 07:36:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1706888202; x=1707493002; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=zT33TDQSpbP682JXm0Djn4kZLyqr6gakrEoe9mM4ahM=; b=mm6mWc1L1bgPHg0tfzdhYBnDCCOQ6pKKcrpkOOryFWamXhrG2ji3uRFYEBgVKyZRfO 5IJEZZHtGn0fnLNJDzOReLyh1z5WM3MB5eWVbgg+h73pTrU/rPhq0f29+bWPI4LhsFmX cVwGFIy0hsb3o/tOPREyP8RgiyapJAY8KiySCdoUnOLq8w4Ai6Ec4eAismbDOFkTH3PT wQg1Y9X5HcdXBHVZU0/bAZ/dD7VGcvH+qynGRP2NHX35tKROzMkJnglanWsOFT3kqllR 3N+FZ6wP8hdLsTXgzHvgqZvR0HqbqJ+NxEA9zH09vemP26jOHUAhOPvlvqg7Im7bUj0j e3OQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706888202; x=1707493002; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zT33TDQSpbP682JXm0Djn4kZLyqr6gakrEoe9mM4ahM=; b=l/8QvXLArPScobkvYXJ8IsaMZ7ev14sh7TEIuS/eRjNvKA4UG87OeCeMY9t/XK7gbE VOEQ0/BPL9MjXZOqa6S26OtF20nzkp3wZFaLC+Wsy6oqI9Ae1A9vfScc2pskkUBlSW9N rReRZibegjGZXTk1UbJfsB213T5pULpBNAKTGAk4IvdAQzRSyTytQKwby70FaZ+SFcBr sEVx14XR1hCmLuyoKQuv8atW2d5FWqiU651OgOLQ+kWbBa5bNQjlF0OGy/35PtYDrwyc f9Q85UalAntmytuSqb9IWP3fwIjhw7jvynYEqLIqG59IOT6winYP1y4zsn4JwVfVfBh9 iH9w== X-Gm-Message-State: AOJu0Yym8PnOFlqPS6XfS3NbnURZIeXYH9xqQH3+DAe1iJ3+NC7FacZd SUW6Q+YSoRyAGbG4qc92sZhgWsicMriOERDwaWzFwzfiYIeLuEepv0oBt30pzmshi5GG+4PM1C0 o X-Google-Smtp-Source: AGHT+IHjKEMfHHK6OQMK4cAorQm+MYbaCF9hw2XQyr9vYsc19vjLZWeqS0deCXcTTZs6h2GL5h+75w== X-Received: by 2002:a05:600c:45d1:b0:40f:b0ca:2b2d with SMTP id s17-20020a05600c45d100b0040fb0ca2b2dmr6271565wmo.1.1706888202323; Fri, 02 Feb 2024 07:36:42 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 07/36] system/vl.c: Fix handling of '-serial none -serial something' Date: Fri, 2 Feb 2024 15:36:08 +0000 Message-Id: <20240202153637.3710444-8-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240202153637.3710444-1-peter.maydell@linaro.org> References: <20240202153637.3710444-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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::336; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x336.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: 1706888315903100017 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 Signed-off-by: Peter Maydell Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Richard Henderson Message-id: 20240122163607.459769-2-peter.maydell@linaro.org Fixes: 998bbd74b9d81 ("default devices: core code & serial lines") Signed-off-by: Peter Maydell --- system/vl.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/system/vl.c b/system/vl.c index 60fd1e56b6b..bb959cbc440 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