From patchwork Thu Mar 11 21:09:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 1451537 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4DxM9N4R8jz9sPf for ; Fri, 12 Mar 2021 08:12:56 +1100 (AEDT) Received: from localhost ([::1]:39822 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lKSc2-0001HQ-M3 for incoming@patchwork.ozlabs.org; Thu, 11 Mar 2021 16:12:54 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:45656) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lKSZ9-0006rn-Rq for qemu-devel@nongnu.org; Thu, 11 Mar 2021 16:09:55 -0500 Received: from mout.kundenserver.de ([212.227.17.13]:41619) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lKSZ6-00053s-92 for qemu-devel@nongnu.org; Thu, 11 Mar 2021 16:09:55 -0500 Received: from localhost.localdomain ([82.142.6.26]) by mrelayeu.kundenserver.de (mreue109 [212.227.15.183]) with ESMTPSA (Nemesis) id 1MqrsF-1m72rX3QUT-00mwPx; Thu, 11 Mar 2021 22:09:43 +0100 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PULL 8/9] m68k: add a system controller Date: Thu, 11 Mar 2021 22:09:33 +0100 Message-Id: <20210311210934.1935587-9-laurent@vivier.eu> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210311210934.1935587-1-laurent@vivier.eu> References: <20210311210934.1935587-1-laurent@vivier.eu> MIME-Version: 1.0 X-Provags-ID: V03:K1:QSIRdpNJ6FO19xn6LfAizCbwrBdV+N3TBINhEf0qNSpX8SV/v5C lDZWjEdSI/WJM5I/9+SuzZvYcC3WSEGMT8uxD7ehiQhe4KKl3rUqA8910fZltuJQpHxjKcL IL9csZutWz4XSbpp3mYmAPS1EXgc74uJK+IGA+qGeoK03TySCY9rYE14+PRpSXyWA4cVcmD EprOKe5KgtfQ49cbgb/nQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:lMLNVK7C9GQ=:CGSK0ruNeTs4YbM96bZZf5 sKv92FpSiDpMwv0zkYbAL92+o/NT5N8rEgz1R00tTPuP+ERwGb9XrozdIQikuialXthxIFDlI ZEUXUNasGawplPNXDTzH5jUtxo0NYlVPll6LQrKtmiWxlyRJnDKU/nQluLUgeynEuXlKYzHuG X2TNmkh0azDlr2YhWJwjiFshmMzrgO44C59qbq5Biuhs2PyxPe1d0PlkdC5DFHmnB5RDnL5qx /dZnNInaBICDjEHFqVV5AYpgnTVTm1zNCVeykvD8XPbUIR0IKzvQaJ7WmBq4GpU9ukyUORTrK nepRDU5m9L2iN9zgLleODtpVTNt4/WbcAfTutwsEj2KHqILYdyRuBlOCnuiyqAF8WINDJCNwm Sy2VuW2U9gAfy0AAGrbgxLQn3K4Z6Dlc7n6io18K59hHmkWFjbOwLxMkpBFcX Received-SPF: none client-ip=212.227.17.13; envelope-from=laurent@vivier.eu; helo=mout.kundenserver.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Richard Henderson , Laurent Vivier , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Add a system controller for the m68k-virt machine. This controller allows the kernel to power off or reset the machine. Signed-off-by: Laurent Vivier Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Tested-by: Philippe Mathieu-Daudé Message-Id: <20210309195941.763896-5-laurent@vivier.eu> Signed-off-by: Laurent Vivier --- docs/specs/virt-ctlr.txt | 26 +++++++ include/hw/misc/virt_ctrl.h | 22 ++++++ hw/misc/virt_ctrl.c | 151 ++++++++++++++++++++++++++++++++++++ hw/misc/Kconfig | 3 + hw/misc/meson.build | 3 + hw/misc/trace-events | 7 ++ 6 files changed, 212 insertions(+) create mode 100644 docs/specs/virt-ctlr.txt create mode 100644 include/hw/misc/virt_ctrl.h create mode 100644 hw/misc/virt_ctrl.c diff --git a/docs/specs/virt-ctlr.txt b/docs/specs/virt-ctlr.txt new file mode 100644 index 000000000000..24d38084f7fd --- /dev/null +++ b/docs/specs/virt-ctlr.txt @@ -0,0 +1,26 @@ +Virtual System Controller +========================= + +This device is a simple interface defined for the pure virtual machine with no +hardware reference implementation to allow the guest kernel to send command +to the host hypervisor. + +The specification can evolve, the current state is defined as below. + +This is a MMIO mapped device using 256 bytes. + +Two 32bit registers are defined: + +1- the features register (read-only, address 0x00) + + This register allows the device to report features supported by the + controller. + The only feature supported for the moment is power control (0x01). + +2- the command register (write-only, address 0x04) + + This register allows the kernel to send the commands to the hypervisor. + The implemented commands are part of the power control feature and + are reset (1), halt (2) and panic (3). + A basic command, no-op (0), is always present and can be used to test the + register access. This command has no effect. diff --git a/include/hw/misc/virt_ctrl.h b/include/hw/misc/virt_ctrl.h new file mode 100644 index 000000000000..edfadc469505 --- /dev/null +++ b/include/hw/misc/virt_ctrl.h @@ -0,0 +1,22 @@ +/* + * SPDX-License-Identifer: GPL-2.0-or-later + * + * Virt system Controller + */ + +#ifndef VIRT_CTRL_H +#define VIRT_CTRL_H + +#define TYPE_VIRT_CTRL "virt-ctrl" +OBJECT_DECLARE_SIMPLE_TYPE(VirtCtrlState, VIRT_CTRL) + +struct VirtCtrlState { + SysBusDevice parent_obj; + + MemoryRegion iomem; + qemu_irq irq; + + uint32_t irq_enabled; +}; + +#endif diff --git a/hw/misc/virt_ctrl.c b/hw/misc/virt_ctrl.c new file mode 100644 index 000000000000..2ea01bd7a1f0 --- /dev/null +++ b/hw/misc/virt_ctrl.c @@ -0,0 +1,151 @@ +/* + * SPDX-License-Identifer: GPL-2.0-or-later + * + * Virt system Controller + */ + +#include "qemu/osdep.h" +#include "hw/irq.h" +#include "hw/qdev-properties.h" +#include "hw/sysbus.h" +#include "migration/vmstate.h" +#include "qemu/log.h" +#include "trace.h" +#include "sysemu/runstate.h" +#include "hw/misc/virt_ctrl.h" + +enum { + REG_FEATURES = 0x00, + REG_CMD = 0x04, +}; + +#define FEAT_POWER_CTRL 0x00000001 + +enum { + CMD_NOOP, + CMD_RESET, + CMD_HALT, + CMD_PANIC, +}; + +static uint64_t virt_ctrl_read(void *opaque, hwaddr addr, unsigned size) +{ + VirtCtrlState *s = opaque; + uint64_t value = 0; + + switch (addr) { + case REG_FEATURES: + value = FEAT_POWER_CTRL; + break; + default: + qemu_log_mask(LOG_UNIMP, + "%s: unimplemented register read 0x%02"HWADDR_PRIx"\n", + __func__, addr); + break; + } + + trace_virt_ctrl_write(s, addr, size, value); + + return value; +} + +static void virt_ctrl_write(void *opaque, hwaddr addr, uint64_t value, + unsigned size) +{ + VirtCtrlState *s = opaque; + + trace_virt_ctrl_write(s, addr, size, value); + + switch (addr) { + case REG_CMD: + switch (value) { + case CMD_NOOP: + break; + case CMD_RESET: + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + break; + case CMD_HALT: + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + break; + case CMD_PANIC: + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC); + break; + } + break; + default: + qemu_log_mask(LOG_UNIMP, + "%s: unimplemented register write 0x%02"HWADDR_PRIx"\n", + __func__, addr); + break; + } +} + +static const MemoryRegionOps virt_ctrl_ops = { + .read = virt_ctrl_read, + .write = virt_ctrl_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid.max_access_size = 4, + .impl.max_access_size = 4, +}; + +static void virt_ctrl_reset(DeviceState *dev) +{ + VirtCtrlState *s = VIRT_CTRL(dev); + + trace_virt_ctrl_reset(s); +} + +static void virt_ctrl_realize(DeviceState *dev, Error **errp) +{ + VirtCtrlState *s = VIRT_CTRL(dev); + + trace_virt_ctrl_instance_init(s); + + memory_region_init_io(&s->iomem, OBJECT(s), &virt_ctrl_ops, s, + "virt-ctrl", 0x100); +} + +static const VMStateDescription vmstate_virt_ctrl = { + .name = "virt-ctrl", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(irq_enabled, VirtCtrlState), + VMSTATE_END_OF_LIST() + } +}; + +static void virt_ctrl_instance_init(Object *obj) +{ + SysBusDevice *dev = SYS_BUS_DEVICE(obj); + VirtCtrlState *s = VIRT_CTRL(obj); + + trace_virt_ctrl_instance_init(s); + + sysbus_init_mmio(dev, &s->iomem); + sysbus_init_irq(dev, &s->irq); +} + +static void virt_ctrl_class_init(ObjectClass *oc, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(oc); + + dc->reset = virt_ctrl_reset; + dc->realize = virt_ctrl_realize; + dc->vmsd = &vmstate_virt_ctrl; +} + +static const TypeInfo virt_ctrl_info = { + .name = TYPE_VIRT_CTRL, + .parent = TYPE_SYS_BUS_DEVICE, + .class_init = virt_ctrl_class_init, + .instance_init = virt_ctrl_instance_init, + .instance_size = sizeof(VirtCtrlState), +}; + +static void virt_ctrl_register_types(void) +{ + type_register_static(&virt_ctrl_info); +} + +type_init(virt_ctrl_register_types) diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig index 5426b9b1a1ad..c71ed2582046 100644 --- a/hw/misc/Kconfig +++ b/hw/misc/Kconfig @@ -183,4 +183,7 @@ config SIFIVE_U_OTP config SIFIVE_U_PRCI bool +config VIRT_CTRL + bool + source macio/Kconfig diff --git a/hw/misc/meson.build b/hw/misc/meson.build index 00356cf12ec7..f44d068e2dbd 100644 --- a/hw/misc/meson.build +++ b/hw/misc/meson.build @@ -24,6 +24,9 @@ softmmu_ss.add(when: 'CONFIG_ARM11SCU', if_true: files('arm11scu.c')) # Mac devices softmmu_ss.add(when: 'CONFIG_MOS6522', if_true: files('mos6522.c')) +# virt devices +softmmu_ss.add(when: 'CONFIG_VIRT_CTRL', if_true: files('virt_ctrl.c')) + # RISC-V devices softmmu_ss.add(when: 'CONFIG_MCHP_PFSOC_DMC', if_true: files('mchp_pfsoc_dmc.c')) softmmu_ss.add(when: 'CONFIG_MCHP_PFSOC_IOSCB', if_true: files('mchp_pfsoc_ioscb.c')) diff --git a/hw/misc/trace-events b/hw/misc/trace-events index 4b15db8ca488..e77d63f4e9b4 100644 --- a/hw/misc/trace-events +++ b/hw/misc/trace-events @@ -247,3 +247,10 @@ pca955x_gpio_change(const char *description, unsigned id, unsigned prev_state, u bcm2835_cprman_read(uint64_t offset, uint64_t value) "offset:0x%" PRIx64 " value:0x%" PRIx64 bcm2835_cprman_write(uint64_t offset, uint64_t value) "offset:0x%" PRIx64 " value:0x%" PRIx64 bcm2835_cprman_write_invalid_magic(uint64_t offset, uint64_t value) "offset:0x%" PRIx64 " value:0x%" PRIx64 + +# virt_ctrl.c +virt_ctrl_read(void *dev, unsigned int addr, unsigned int size, uint64_t value) "ctrl: %p reg: 0x%02x size: %d value: 0x%"PRIx64 +virt_ctrl_write(void *dev, unsigned int addr, unsigned int size, uint64_t value) "ctrl: %p reg: 0x%02x size: %d value: 0x%"PRIx64 +virt_ctrl_reset(void *dev) "ctrl: %p" +virt_ctrl_realize(void *dev) "ctrl: %p" +virt_ctrl_instance_init(void *dev) "ctrl: %p"