From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7366E23AB8D for ; Sun, 22 Feb 2026 17:32:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771781562; cv=none; b=c8RiRY00tVzpx/TfGEyRWY3ZWAwTbP9QyYQONiAKjxjEsbFVmypUGZf+9KZzjuFzmC3nl3PIxiPw4qXkOunXRFk7EgRLlyJO8XgdGNHGLU6tA0HXgHdHCUHPo53Z9Xx7ev1+21XuJqqTzM/vf7bF1hYdYlJRlJCrlruc70din0o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771781562; c=relaxed/simple; bh=84RpaymkYjedYJkOTZPTM2j0/+tI4Ix62BDTCGBRBsE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Wswvt/gq/j6vwDC5a+jfhpF2//Cq+hYsIJzPzTu5BTuGUukioY0meEWi3E7/O3mdehRkmjJpqsVUSw06/JGLl5nlxBzv196xWVM/ZUVwWvOoOZt0FZ2OK4EbhdYCxVFSyQv2k1BtE8Vw9jnY4LDE9fDLvfaPCKOpmHtyAqgrWzs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=SmDQuE2U; arc=none smtp.client-ip=209.85.210.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="SmDQuE2U" Received: by mail-pf1-f179.google.com with SMTP id d2e1a72fcca58-824b5f015bcso3518136b3a.1 for ; Sun, 22 Feb 2026 09:32:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1771781561; x=1772386361; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=0C5225Erxu+gYNOcbLKnNHNXfo0Dpl+lzsBtZrdkm/8=; b=SmDQuE2UVw2NML8XELMybI7XwqNpcqvEKKHxeJEt0tohG2lpe6+fiuG10te8a8GE+U oqjyk6jpj9kFtk1j3gy8Cv3quNG56hs22Ul974Owbirjzdvn9iHv+1ESCgQNk07HfxR4 Hf6KwqhlGpk6Gfm7hpvfvss8w2JrKTtpVFD9adsMy5hAdB9HHt4f1YyyVtoYAT3lWPu3 j7OijO+w/iXsaXA7OYeKigzcgasBgTgj4nkef+dTVLsrVdjMNE6NLaRy4DafDAq4TPDH pWdxiXLiOQFbnfM33HEd5W9wijGNfFBKwme8gzmaemtkm/7BKjQjYdps9voe/IHzoosX JYTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771781561; x=1772386361; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=0C5225Erxu+gYNOcbLKnNHNXfo0Dpl+lzsBtZrdkm/8=; b=LPhtq9CUI1HGhZaGP/r2HtdHqXRHXrfNcf0migIpFbCK3nGjWwdJPXQm6jhGxDQPh5 CepCm9Be59qbH8e29cKkcr4Xbj1l38+whQlmei3+i0HWwPfsZJQup+P5d63l85reH7Kc u11IFE7KL4uHxyt8XA+161sxYjlAJeRhmGw/oP2B1yp6PIpkdqAO42LKcxtMAMWbeiCY a0qTc3kLJIQoNOPmG2JSEPKVVHP38TbJpZ+iK5Sb/eS3+BZ1IH+YMCI0usGvaCebgtih kqrbK8X6Jo+jmyYHQEDuJUfoD080K4eJCoodWNiwlnmQC0yFhpkrwbCrlddGEJpB9Rfo P9Eg== X-Forwarded-Encrypted: i=1; AJvYcCWRwOx7mdKxQ/7n/xAAJRtnoncS4fWBKrdkdhvBSpxAkmFl1wDsdJwGdyC4gyjS7k5Tp86nZAcgAg==@vger.kernel.org X-Gm-Message-State: AOJu0Yxt2k/cgpIjVQumN9/hAQitaKoGRmDb1c5j9BVIwpL9NMa+C9uH Ze5MS9RcX4krRqT2Q1sRpytkLltGN9L3UdzbTpP6vIWIevd0wxvEmr6U X-Gm-Gg: AZuq6aJRiqw5mNycdHOcTpVySNFY/DUxg6e7wPu1jLuaTW14o2YNmg+HaD1uXQ69qcv oXuI+2K6mLgQBBVfQrXPEz06eVarUNGlLL/fOB7pMfYKy/DWNsnw9aT30VZ7T7NA80UbcllrqG5 ADJQV+i2055XK4tp83ZywlRdY9cEOHIwMTJbBJmQPFPJpb0UZkvA4+QXCVcRAxeXiFoRLzftnH+ iviswc3XDTD+zI51z5/aoZ3ilx72d0e9Qvv10ddmIP6XpLF2ujkS3B0plSSmyRv+4jlKStc2Zv1 EIaWuDgOWsrs2IKepZVoxSB0wfRuV9cbKyYzRSyV8HKNSKE9iPnC0I4E6HNZ4CkmifO2UI6CA7A 22ILaP2IR+XQkIaG4IShZjgVC2mDvSnpUQfSXNwQgS/xAGQWV5ulu4q6oC5a78oEckVAeZJ97Qx 3sB7N601fIbIFjgVrlDx5563OC54dRFGUZtktevtjmOxqEfsCcYRMtDxngUHMLdK2Ei0MoZe+Yy 40VGOJYS/XdEdaEBP120HGAt1I5FMe4fP9Q X-Received: by 2002:a05:6a21:3389:b0:35f:46d3:f28e with SMTP id adf61e73a8af0-39545f8d743mr5588261637.43.1771781560668; Sun, 22 Feb 2026 09:32:40 -0800 (PST) Received: from visitorckw-work01.c.googlers.com.com (7.162.199.104.bc.googleusercontent.com. [104.199.162.7]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c70b726cbf2sm5275750a12.34.2026.02.22.09.32.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 09:32:39 -0800 (PST) From: Kuan-Wei Chiu To: geert@linux-m68k.org, sre@kernel.org Cc: jserv@ccns.ncku.edu.tw, eleanor15x@gmail.com, daniel@0x0f.com, laurent@vivier.eu, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-pm@vger.kernel.org, Kuan-Wei Chiu Subject: [PATCH v3 0/2] Add QEMU virt-ctrl driver and update m68k virt Date: Sun, 22 Feb 2026 17:32:23 +0000 Message-ID: <20260222173225.1105572-1-visitorckw@gmail.com> X-Mailer: git-send-email 2.53.0.345.g96ddfc5eaa-goog Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Introduce a generic platform driver for the QEMU 'virt-ctrl' device [1] and transitions the m68k 'virt' machine to use it, replacing architecture-specific hooks. The new driver ('qemu-virt-ctrl') registers a restart handler and populates the global 'pm_power_off' callback. On the m68k side, the platform initialization is updated to register the 'qemu-virt-ctrl' platform device. Additionally, the 'mach_reset' hook is bridged to 'do_kernel_restart()' to ensure the kernel's restart handler chain is correctly invoked. Verified on QEMU m68k virt. Both system reset and power-off were confirmed functional by invoking 'reboot(LINUX_REBOOT_CMD_RESTART)', 'reboot(LINUX_REBOOT_CMD_POWER_OFF)', and 'reboot(LINUX_REBOOT_CMD_HALT)' from userspace. Link: https://gitlab.com/qemu-project/qemu/-/blob/v10.2.0/hw/misc/virt_ctrl.c [1] --- Changes in v3: - Add a reboot notifier in the driver to handle LINUX_REBOOT_CMD_HALT. - Handle native endianness in the driver instead of hardcoding big-endian I/O writes. - Select POWER_RESET and POWER_RESET_QEMU_VIRT_CTRL in m68k Kconfig.machine. Changes in v2: - Use devm_register_sys_off_handler() instead of register_restart_handler() and global pm_power_off. - Switch Kconfig to tristate to support modular build. - Add .id_table to platform_driver and use MODULE_DEVICE_TABLE() to correct module auto-loading. v2: https://lore.kernel.org/lkml/20260203170824.2968045-1-visitorckw@gmail.com/ v1: https://lore.kernel.org/lkml/20260112182258.1851769-1-visitorckw@gmail.com/ Kuan-Wei Chiu (2): power: reset: Add QEMU virt-ctrl driver m68k: virt: Switch to qemu-virt-ctrl driver MAINTAINERS | 6 ++ arch/m68k/Kconfig.machine | 2 + arch/m68k/virt/config.c | 42 +-------- arch/m68k/virt/platform.c | 20 ++++- drivers/power/reset/Kconfig | 10 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/qemu-virt-ctrl.c | 122 +++++++++++++++++++++++++++ 7 files changed, 159 insertions(+), 44 deletions(-) create mode 100644 drivers/power/reset/qemu-virt-ctrl.c -- 2.53.0.345.g96ddfc5eaa-goog