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[35.201.239.118]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3548633616csm177520a91.17.2026.02.03.09.08.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Feb 2026 09:08:36 -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, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-pm@vger.kernel.org, Kuan-Wei Chiu Subject: [PATCH v2 0/2] Add QEMU virt-ctrl driver and update m68k virt Date: Tue, 3 Feb 2026 17:08:22 +0000 Message-ID: <20260203170824.2968045-1-visitorckw@gmail.com> X-Mailer: git-send-email 2.53.0.rc1.225.gd81095ad13-goog Precedence: bulk X-Mailing-List: linux-kernel@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)' and 'reboot(LINUX_REBOOT_CMD_POWER_OFF)' from userspace. Link: https://gitlab.com/qemu-project/qemu/-/blob/v10.2.0/hw/misc/virt_ctrl.c [1] --- 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. 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/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 | 89 ++++++++++++++++++++++++++++ 6 files changed, 124 insertions(+), 44 deletions(-) create mode 100644 drivers/power/reset/qemu-virt-ctrl.c -- 2.53.0.rc1.225.gd81095ad13-goog