From patchwork Thu Sep 14 18:37:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Ogness X-Patchwork-Id: 13386063 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 333A4EEAA78 for ; Thu, 14 Sep 2023 21:10:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=swnXCfzyp8G1+YUvlrAls6D/aGcDIIU4Y2lQ9HJuGJU=; b=IeWYgXEDOlyMO3 c9fy1XEE7wdGxJ385viyIbqIzYVDmmF0DtdjfIq7KP7EzPamndeOPiHUUffiaSraZZG3YT8BKuNyP fHdriliWWjtPE65HVlGyULbqRKAepdkFrOuMJBkic7R8dnB9XSpBcoocq2ceot25tSFQZV+//n9WP Cx3vl17Hfy7yydwvcfWRgrZKG2V1JUe4vxrCwQ87eznsoy9rpUJApqiyz9KRRyk6qDSy7OYBINcBl m1JjkXfQjBK4r/wnez1Scn0IvYswD1P1D4ntds2btPE/YFzpvNE6btIU+2Uq4iqkvOc+D/WEs6Bpn 7/IBp+7HPFx5elYeTTaA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qgtbX-009I0R-2y; Thu, 14 Sep 2023 21:10:27 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qgrEt-0094k0-0v; Thu, 14 Sep 2023 18:38:58 +0000 From: John Ogness DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1694716719; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=aQcu0Tj+ffJBWZVQ9fNZPj8/IhtyreTS7DJJKIPF900=; b=Z8UeMKj4Fav9MLhk6d+JmpTi5nJHEpVJNO1ur5Ad3vBiVWCnoe9Eog0Qg33XlH6id3FWbz S8l2Lt2jSbU2XHwf8xi9UIitF4+b8K7paGx1bjjYr5t2rdTDVV0Fim6UAKFi2CtuZ1mb3L E0TJN4HYA+tWtKTLOiVDx3F+jVsGlfsYYAnFZvFt3iKUUrP7SkGJJcZ1UIkJ/UqIQ0831V SMEuLB8ZIcl+FG04i7hT9/QWq5F02SyOTdFIc9j7ps1+LHHwMSHMPuADoGutw3ZHkUAICp RXxdloN+Gh4cSEl07/GwEgsU+m8aqlGccQ2NbBYv7A5wSEzPoJaqC36jkiHDjg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1694716719; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=aQcu0Tj+ffJBWZVQ9fNZPj8/IhtyreTS7DJJKIPF900=; b=6i/Rykkl4Rl5SBtIHP9RIQNQNOB8Crkkj2AcFISLN8Dmxq51odZMyUMI6Usmo7xHPgkuGu 8OGeRMSrDoYZsqCg== To: Greg Kroah-Hartman Subject: [PATCH tty v1 00/74] serial: wrappers for uart port lock Date: Thu, 14 Sep 2023 20:43:17 +0206 Message-Id: <20230914183831.587273-1-john.ogness@linutronix.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230914_113855_627177_99EEF4C5 X-CRM114-Status: GOOD ( 15.88 ) X-Mailman-Approved-At: Thu, 14 Sep 2023 14:10:24 -0700 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Geert Uytterhoeven , Alim Akhtar , Peter Korsgaard , linux-stm32@st-md-mailman.stormreply.com, Karol Gugala , Jerome Brunet , linux-samsung-soc@vger.kernel.org, Kevin Hilman , Hugo Villeneuve , Christophe Leroy , Hammer Hsieh , Jiamei Xie , NXP Linux Team , Vineet Gupta , Thierry Reding , Petr Mladek , Arend van Spriel , Sascha Hauer , Nicholas Piggin , linux-unisoc@lists.infradead.org, Thomas Gleixner , Andrew Jeffery , linux-kernel@vger.kernel.org, Richard Genoud , Pengutronix Kernel Team , Andrew Morton , "Maciej W. Rozycki" , Alexandre Belloni , linux-aspeed@lists.ozlabs.org, Laxman Dewangan , Dmitry Rokosov , Xiongfeng Wang , Matthias Schiffer , delisun , Fabio Estevam , Ruan Jinjie , Matthew Howell , Jonathan Hunter , Gabriel Somlo , Hongyu Xie , Tobias Klauser , Yangtao Li , Martin Blumenstingl , linux-arm-msm@vger.kernel.org, linux-actions@lists.infradead.org, Biju Das , linux-amlogic@lists.infradead.org, Michal Simek , Sherry Sun , Neil Armstrong , Chunyan Zhang , "David S. Miller" , Kumaravel Thiagarajan , Lukas Wunner , Sergey Organov , Mukesh Ojha , Maxime Coquelin , Michael Ellerman , =?utf-8?q?Pali_Roh=C3=A1r?= , Lino Sanfilippo , Tom Rix , Lorenzo Pieralisi , Al Cooper , Yuan Can , Isaac True , linux-tegra@vger.kernel.org, Jiri Slaby , Rob Herring , Florian Fainelli , Mateusz Holenko , Kevin Cernekee , Andy Shevchenko , Shenwei Wang , Broadcom internal kernel review list , Joel Stanley , Chen-Yu Tsai , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , linux-snps-arc@lists.infradead.org, Patrice Chotard , Jacky Huang , Arnd Bergmann , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , Vladimir Zapolskiy , Baolin Wang , Orson Zhai , Tharun Kumar P , Timur Tabi , Claudiu Beznea , Konrad Dybcio , Thierry Reding , Sudeep Holla , Shawn Guo , =?utf-8?q?Andreas_F=C3=A4rber?= , Baruch Siach , Valentin Caron , Tony Lindgren , Sebastian Andrzej Siewior , Liviu Dudau , Alexandre Torgue , sparclinux@vger.kernel.org, Shan-Chun Hung , linux-riscv@lists.infradead.org, Marek Vasut , Lech Perczak , Russell King , Nick Hu , Andy Gross , linux-serial@vger.kernel.org, Lukas Bulwahn , Manivannan Sadhasivam , Johan Hovold , linux-mediatek@lists.infradead.org, Paul Walmsley , Matthias Brugger , Andy Shevchenko , AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, Taichi Sugaya , Bjorn Andersson , Nicolas Ferre , Lucas Tanure , Andrew Davis , Krzysztof Kozlowski , Palmer Dabbelt , Takao Orito , linuxppc-dev@lists.ozlabs.org Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org When a serial port is used for kernel console output, then all modifications to the UART registers which are done from other contexts, e.g. getty, termios, are interference points for the kernel console. So far this has been ignored and the printk output is based on the principle of hope. The rework of the console infrastructure which aims to support threaded and atomic consoles, requires to mark sections which modify the UART registers as unsafe. This allows the atomic write function to make informed decisions and eventually to restore operational state. It also allows to prevent the regular UART code from modifying UART registers while printk output is in progress. All modifications of UART registers are guarded by the UART port lock, which provides an obvious synchronization point with the console infrastructure. Provide and use wrapper functions for spin_[un]lock*(port->lock) invocations so that the console mechanics can be applied later on at a single place and does not require to copy the same logic all over the drivers. Patch 1 adds the wrapper functions. Patches 2-74 switch all uart port locking call sites to use the new wrappers. These patches were automatically generated using coccinelle. The 2 used coccinelle scripts are included below and executed as follows: $ spatch --sp-file uartlock-1.cocci $FILE $ spatch --sp-file uartlock-2.cocci --recursive-includes $FILE This series brings no functional change. Patches 2-74 contain identical commit message bodies. Feel free to fold them into a single commit if that seems more reasonable. Thomas Gleixner (74): serial: core: Provide port lock wrappers serial: core: Use lock wrappers serial: 21285: Use port lock wrappers serial: 8250_aspeed_vuart: Use port lock wrappers serial: 8250_bcm7271: Use port lock wrappers serial: 8250: Use port lock wrappers serial: 8250_dma: Use port lock wrappers serial: 8250_dw: Use port lock wrappers serial: 8250_exar: Use port lock wrappers serial: 8250_fsl: Use port lock wrappers serial: 8250_mtk: Use port lock wrappers serial: 8250_omap: Use port lock wrappers serial: 8250_pci1xxxx: Use port lock wrappers serial: altera_jtaguart: Use port lock wrappers serial: altera_uart: Use port lock wrappers serial: amba-pl010: Use port lock wrappers serial: amba-pl011: Use port lock wrappers serial: apb: Use port lock wrappers serial: ar933x: Use port lock wrappers serial: arc_uart: Use port lock wrappers serial: atmel: Use port lock wrappers serial: bcm63xx-uart: Use port lock wrappers serial: cpm_uart: Use port lock wrappers serial: digicolor: Use port lock wrappers serial: dz: Use port lock wrappers serial: linflexuart: Use port lock wrappers serial: fsl_lpuart: Use port lock wrappers serial: icom: Use port lock wrappers serial: imx: Use port lock wrappers serial: ip22zilog: Use port lock wrappers serial: jsm: Use port lock wrappers serial: liteuart: Use port lock wrappers serial: lpc32xx_hs: Use port lock wrappers serial: ma35d1: Use port lock wrappers serial: mcf: Use port lock wrappers serial: men_z135_uart: Use port lock wrappers serial: meson: Use port lock wrappers serial: milbeaut_usio: Use port lock wrappers serial: mpc52xx: Use port lock wrappers serial: mps2-uart: Use port lock wrappers serial: msm: Use port lock wrappers serial: mvebu-uart: Use port lock wrappers serial: omap: Use port lock wrappers serial: owl: Use port lock wrappers serial: pch: Use port lock wrappers serial: pic32: Use port lock wrappers serial: pmac_zilog: Use port lock wrappers serial: pxa: Use port lock wrappers serial: qcom-geni: Use port lock wrappers serial: rda: Use port lock wrappers serial: rp2: Use port lock wrappers serial: sa1100: Use port lock wrappers serial: samsung_tty: Use port lock wrappers serial: sb1250-duart: Use port lock wrappers serial: sc16is7xx: Use port lock wrappers serial: tegra: Use port lock wrappers serial: core: Use port lock wrappers serial: mctrl_gpio: Use port lock wrappers serial: txx9: Use port lock wrappers serial: sh-sci: Use port lock wrappers serial: sifive: Use port lock wrappers serial: sprd: Use port lock wrappers serial: st-asc: Use port lock wrappers serial: stm32: Use port lock wrappers serial: sunhv: Use port lock wrappers serial: sunplus-uart: Use port lock wrappers serial: sunsab: Use port lock wrappers serial: sunsu: Use port lock wrappers serial: sunzilog: Use port lock wrappers serial: timbuart: Use port lock wrappers serial: uartlite: Use port lock wrappers serial: ucc_uart: Use port lock wrappers serial: vt8500: Use port lock wrappers serial: xilinx_uartps: Use port lock wrappers drivers/tty/serial/21285.c | 8 +- drivers/tty/serial/8250/8250_aspeed_vuart.c | 6 +- drivers/tty/serial/8250/8250_bcm7271.c | 28 +++--- drivers/tty/serial/8250/8250_core.c | 12 +-- drivers/tty/serial/8250/8250_dma.c | 8 +- drivers/tty/serial/8250/8250_dw.c | 8 +- drivers/tty/serial/8250/8250_exar.c | 4 +- drivers/tty/serial/8250/8250_fsl.c | 6 +- drivers/tty/serial/8250/8250_mtk.c | 8 +- drivers/tty/serial/8250/8250_omap.c | 52 +++++----- drivers/tty/serial/8250/8250_pci1xxxx.c | 8 +- drivers/tty/serial/8250/8250_port.c | 100 ++++++++++---------- drivers/tty/serial/altera_jtaguart.c | 28 +++--- drivers/tty/serial/altera_uart.c | 20 ++-- drivers/tty/serial/amba-pl010.c | 20 ++-- drivers/tty/serial/amba-pl011.c | 72 +++++++------- drivers/tty/serial/apbuart.c | 8 +- drivers/tty/serial/ar933x_uart.c | 26 ++--- drivers/tty/serial/arc_uart.c | 16 ++-- drivers/tty/serial/atmel_serial.c | 24 ++--- drivers/tty/serial/bcm63xx_uart.c | 22 ++--- drivers/tty/serial/cpm_uart.c | 8 +- drivers/tty/serial/digicolor-usart.c | 18 ++-- drivers/tty/serial/dz.c | 32 +++---- drivers/tty/serial/fsl_linflexuart.c | 26 ++--- drivers/tty/serial/fsl_lpuart.c | 88 ++++++++--------- drivers/tty/serial/icom.c | 26 ++--- drivers/tty/serial/imx.c | 84 ++++++++-------- drivers/tty/serial/ip22zilog.c | 36 +++---- drivers/tty/serial/jsm/jsm_neo.c | 4 +- drivers/tty/serial/jsm/jsm_tty.c | 16 ++-- drivers/tty/serial/liteuart.c | 20 ++-- drivers/tty/serial/lpc32xx_hs.c | 26 ++--- drivers/tty/serial/ma35d1_serial.c | 22 ++--- drivers/tty/serial/mcf.c | 20 ++-- drivers/tty/serial/men_z135_uart.c | 8 +- drivers/tty/serial/meson_uart.c | 30 +++--- drivers/tty/serial/milbeaut_usio.c | 16 ++-- drivers/tty/serial/mpc52xx_uart.c | 12 +-- drivers/tty/serial/mps2-uart.c | 16 ++-- drivers/tty/serial/msm_serial.c | 38 ++++---- drivers/tty/serial/mvebu-uart.c | 18 ++-- drivers/tty/serial/omap-serial.c | 38 ++++---- drivers/tty/serial/owl-uart.c | 26 ++--- drivers/tty/serial/pch_uart.c | 10 +- drivers/tty/serial/pic32_uart.c | 20 ++-- drivers/tty/serial/pmac_zilog.c | 52 +++++----- drivers/tty/serial/pxa.c | 30 +++--- drivers/tty/serial/qcom_geni_serial.c | 8 +- drivers/tty/serial/rda-uart.c | 34 +++---- drivers/tty/serial/rp2.c | 20 ++-- drivers/tty/serial/sa1100.c | 20 ++-- drivers/tty/serial/samsung_tty.c | 50 +++++----- drivers/tty/serial/sb1250-duart.c | 12 +-- drivers/tty/serial/sc16is7xx.c | 40 ++++---- drivers/tty/serial/serial-tegra.c | 32 +++---- drivers/tty/serial/serial_core.c | 88 ++++++++--------- drivers/tty/serial/serial_mctrl_gpio.c | 4 +- drivers/tty/serial/serial_port.c | 4 +- drivers/tty/serial/serial_txx9.c | 26 ++--- drivers/tty/serial/sh-sci.c | 68 ++++++------- drivers/tty/serial/sifive.c | 16 ++-- drivers/tty/serial/sprd_serial.c | 30 +++--- drivers/tty/serial/st-asc.c | 18 ++-- drivers/tty/serial/stm32-usart.c | 38 ++++---- drivers/tty/serial/sunhv.c | 28 +++--- drivers/tty/serial/sunplus-uart.c | 26 ++--- drivers/tty/serial/sunsab.c | 34 +++---- drivers/tty/serial/sunsu.c | 46 ++++----- drivers/tty/serial/sunzilog.c | 42 ++++---- drivers/tty/serial/timbuart.c | 8 +- drivers/tty/serial/uartlite.c | 18 ++-- drivers/tty/serial/ucc_uart.c | 4 +- drivers/tty/serial/vt8500_serial.c | 8 +- drivers/tty/serial/xilinx_uartps.c | 56 +++++------ include/linux/serial_core.h | 91 ++++++++++++++++-- 76 files changed, 1086 insertions(+), 1007 deletions(-) base-commit: 0bb80ecc33a8fb5a682236443c1e740d5c917d1d Signed-off-by: John Ogness