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[34.81.118.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a3e3cc794asm180981205ad.70.2026.01.12.10.23.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Jan 2026 10:23:10 -0800 (PST) From: Kuan-Wei Chiu To: geert@linux-m68k.org, sre@kernel.org Cc: jserv@ccns.ncku.edu.tw, eleanor15x@gmail.com, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-pm@vger.kernel.org, Kuan-Wei Chiu Subject: [PATCH 0/2] Add QEMU virt-ctrl driver and update m68k virt Date: Mon, 12 Jan 2026 18:22:55 +0000 Message-ID: <20260112182258.1851769-1-visitorckw@gmail.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-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)' 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] 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 | 98 ++++++++++++++++++++++++++++ 6 files changed, 133 insertions(+), 44 deletions(-) create mode 100644 drivers/power/reset/qemu-virt-ctrl.c -- 2.52.0.457.g6b5491de43-goog