From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f170.google.com (mail-pg1-f170.google.com [209.85.215.170]) (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 6E81D79CD for ; Sun, 22 Feb 2026 17:32:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771781562; cv=none; b=jG0V8Yrzapf4svyXvTl+fbz2Cl5dYu7bSQlzQ3xoFIxrjMnSi4NfKUXSRQRdRrbFHkwaUR85COBglzjjlErzZnWSLquhBtorN0EEQDqBVjYPCtZakezsIKKRbuHLSsdUrDhv7z0BttIvRdQn7zyn1PxLC6QkY/GJurLYy1DEeQU= 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=Sf1tgrXw; arc=none smtp.client-ip=209.85.215.170 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="Sf1tgrXw" Received: by mail-pg1-f170.google.com with SMTP id 41be03b00d2f7-c6e72d7a4d7so2346769a12.0 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=lists.linux-m68k.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=Sf1tgrXw1PyI98U6mrq/NS8HC89r2MkshTM7w/kTEgGj5+RWlYQIFE+piDmh0bQiNh qVydwd+oCIAYcXWQGiW6RsA0/k2U/J15ZAIbdEcY5wyPE7NLrRs7zgWmaT9mOWiN4q6z I/RWszstSwZb92Tq7xB+am6tpUz/mzr35WYdMXtoFB65YsLGGbsm0vOLDFAorENsuHC+ KmEvZwGuYKpqV6yYl34Wt9ppUVQa/E+yrAp7Na/zGMv24XV8xf7H98QSxEeZWTAeEu1z iw+GGJblZ+AYSMhpNtaoEMglZvLFc9b2ca2bnSVYzUQqecy5K0rpgp4VmVopS6iT4ID4 buow== 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=WiYe1nfG2ipfPcryvF822SfX20gIVYGVm8qoH6wRj2uUT+AQghkXEryOFTJQabr5m4 gjIaIvo0P+8sIVwAQVhRd0RdcCB7Ue2XXHreUeJM4gL5UeWO/KUxXaiNAJ5DeQKi16f/ mKgr4uwXvEFIe9u4zsAA0VMAWVuqQP4325FDVgHf55o+2DXXcWLQrMavC/laKDDicIlL aVPq8N1gZPASEFBTaguhBwgy+DwqcUx4IeLRSSloAl516wjIDWRJRjvKLcahiLQ/Q8Zv dBKYq0KK9rMFq4rLVmCf0GEdRTnomTCliiHnSkyLLcW26qT2ElluC7oC0qWqD77mHH2A XbTA== X-Forwarded-Encrypted: i=1; AJvYcCU13J4ScWzbgPMIFbJ5qwyS4jUKlW4zwjKlziAQHFRJiOcOIz+yY2koTr9jckX837tTW/JGN9l3ZxvH@lists.linux-m68k.org X-Gm-Message-State: AOJu0YwenEdtWuCES8szp8d0vYXw/GegBqEHzjhqBiG3XLV/7gKlo1hT lkVg1MbjE7Q1DFAujTwSLh7aAaVRLqCHcicY0TDkEJE11fM0qRyFvS7u X-Gm-Gg: AZuq6aIGUZTo6X720x1h0zkRCsfubBx1ARVBPPzf1f2+VBNALni2ic0daJ9okHL4H6+ JoFrr0quUs/ICBwKDH7RPYuoe3N9Xh5tyddHwElghmeGB1tz0wEfVusuwdyoCB31d/aesCeDi6l geiwrC96IIImdp5+sdAxpsr69X4u3tiyZvpXxIrAPLEsGwJNmS2H9pHLUDodhcx4lkOTif1K7ei Gsbbm92HFfMStsh6TjC3NFqj0OQLJyyvEirccnG+tLgHxuk8VlLmGaVe/hoFpVV4yPbqr+rl6Db TVuI/psCl1PPjew38++Hwu7nGNXoZ7hji0jrPKJ2votJ4FQar0pVNOu6E+AerD1ndCVrnakw2uP ZxtjZoy6fNw23Ofk67Fu84JmxO+PnrwS+d1jqX+DJDk9CYalGxwrqgA005YMmaZnvlqTu4zcVsD dJs977Kdeizv5V9VyzMpLAHolzKdIuq6z/inPjZTrkNsopul0cv9YPLLRoKhsVDat1XdjDwj6yz 3vj7YfAYD4TYUI2m+e0gW8Rx1vBc7M0JSSJ 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-m68k@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