From cd2f8932568fc4c661753143033380b9335f4da8 Mon Sep 17 00:00:00 2001 From: Xiao Wang Date: Tue, 7 Jul 2015 09:19:08 +0200 Subject: [PATCH 094/100] virtio-input: evdev passthrough Message-id: <1436260751-25015-66-git-send-email-jasowang@redhat.com> Patchwork-id: 66840 O-Subject: [RHEL7.2 qemu-kvm-rhev PATCH V2 65/68] virtio-input: evdev passthrough Bugzilla: 1227343 RH-Acked-by: Michael S. Tsirkin RH-Acked-by: David Gibson RH-Acked-by: Laurent Vivier RH-Acked-by: Thomas Huth From: Gerd Hoffmann Notes: conflicts since virtio-gpu was not backported This allows to assign host input devices to the guest: qemu -device virtio-input-host-pci,evdev=/dev/input/event The guest gets exclusive access to the input device, so be careful with assigning the keyboard if you have only one connected to your machine. Signed-off-by: Gerd Hoffmann (cherry picked from commit 006a5edebe656114e0e0a6fb24b8aae6401c1cf4) Signed-off-by: Jason Wang Signed-off-by: Miroslav Rezanina Conflicts: hw/virtio/virtio-pci.h --- hw/input/Makefile.objs | 1 + hw/input/virtio-input-host.c | 188 +++++++++++++++++++++++++++++++++++++++ hw/virtio/virtio-pci.c | 16 ++++ hw/virtio/virtio-pci.h | 10 +++ include/hw/virtio/virtio-input.h | 13 +++ 5 files changed, 228 insertions(+) create mode 100644 hw/input/virtio-input-host.c diff --git a/hw/input/Makefile.objs b/hw/input/Makefile.objs index 0dae710..624ba7e 100644 --- a/hw/input/Makefile.objs +++ b/hw/input/Makefile.objs @@ -11,6 +11,7 @@ common-obj-$(CONFIG_VMMOUSE) += vmmouse.o ifeq ($(CONFIG_LINUX),y) common-obj-$(CONFIG_VIRTIO) += virtio-input.o common-obj-$(CONFIG_VIRTIO) += virtio-input-hid.o +common-obj-$(CONFIG_VIRTIO) += virtio-input-host.o endif obj-$(CONFIG_MILKYMIST) += milkymist-softusb.o diff --git a/hw/input/virtio-input-host.c b/hw/input/virtio-input-host.c new file mode 100644 index 0000000..f7e3d84 --- /dev/null +++ b/hw/input/virtio-input-host.c @@ -0,0 +1,188 @@ +/* + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. See the COPYING file in the + * top-level directory. + */ + +#include "qemu-common.h" +#include "qemu/sockets.h" + +#include "hw/qdev.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/virtio-input.h" + +#include "standard-headers/linux/input.h" + +/* ----------------------------------------------------------------- */ + +static struct virtio_input_config virtio_input_host_config[] = { + { /* empty list */ }, +}; + +static void virtio_input_host_event(void *opaque) +{ + VirtIOInputHost *vih = opaque; + VirtIOInput *vinput = VIRTIO_INPUT(vih); + struct virtio_input_event virtio; + struct input_event evdev; + int rc; + + for (;;) { + rc = read(vih->fd, &evdev, sizeof(evdev)); + if (rc != sizeof(evdev)) { + break; + } + + virtio.type = cpu_to_le16(evdev.type); + virtio.code = cpu_to_le16(evdev.code); + virtio.value = cpu_to_le32(evdev.value); + virtio_input_send(vinput, &virtio); + } +} + +static void virtio_input_bits_config(VirtIOInputHost *vih, + int type, int count) +{ + virtio_input_config bits; + int rc, i, size = 0; + + memset(&bits, 0, sizeof(bits)); + rc = ioctl(vih->fd, EVIOCGBIT(type, count/8), bits.u.bitmap); + if (rc < 0) { + return; + } + + for (i = 0; i < count/8; i++) { + if (bits.u.bitmap[i]) { + size = i+1; + } + } + if (size == 0) { + return; + } + + bits.select = VIRTIO_INPUT_CFG_EV_BITS; + bits.subsel = type; + bits.size = size; + virtio_input_add_config(VIRTIO_INPUT(vih), &bits); +} + +static void virtio_input_host_realize(DeviceState *dev, Error **errp) +{ + VirtIOInputHost *vih = VIRTIO_INPUT_HOST(dev); + VirtIOInput *vinput = VIRTIO_INPUT(dev); + virtio_input_config id; + struct input_id ids; + int rc, ver; + + if (!vih->evdev) { + error_setg(errp, "evdev property is required"); + return; + } + + vih->fd = open(vih->evdev, O_RDWR); + if (vih->fd < 0) { + error_setg_file_open(errp, errno, vih->evdev); + return; + } + qemu_set_nonblock(vih->fd); + + rc = ioctl(vih->fd, EVIOCGVERSION, &ver); + if (rc < 0) { + error_setg(errp, "%s: is not an evdev device", vih->evdev); + goto err_close; + } + + rc = ioctl(vih->fd, EVIOCGRAB, 1); + if (rc < 0) { + error_setg_errno(errp, errno, "%s: failed to get exclusive access", + vih->evdev); + goto err_close; + } + + memset(&id, 0, sizeof(id)); + ioctl(vih->fd, EVIOCGNAME(sizeof(id.u.string)-1), id.u.string); + id.select = VIRTIO_INPUT_CFG_ID_NAME; + id.size = strlen(id.u.string); + virtio_input_add_config(vinput, &id); + + if (ioctl(vih->fd, EVIOCGID, &ids) == 0) { + memset(&id, 0, sizeof(id)); + id.select = VIRTIO_INPUT_CFG_ID_DEVIDS; + id.size = sizeof(struct virtio_input_devids); + id.u.ids.bustype = cpu_to_le16(ids.bustype); + id.u.ids.vendor = cpu_to_le16(ids.vendor); + id.u.ids.product = cpu_to_le16(ids.product); + id.u.ids.version = cpu_to_le16(ids.version); + virtio_input_add_config(vinput, &id); + } + + virtio_input_bits_config(vih, EV_KEY, KEY_CNT); + virtio_input_bits_config(vih, EV_REL, REL_CNT); + virtio_input_bits_config(vih, EV_ABS, ABS_CNT); + virtio_input_bits_config(vih, EV_MSC, MSC_CNT); + virtio_input_bits_config(vih, EV_SW, SW_CNT); + + qemu_set_fd_handler(vih->fd, virtio_input_host_event, NULL, vih); + return; + +err_close: + close(vih->fd); + vih->fd = -1; + return; +} + +static void virtio_input_host_unrealize(DeviceState *dev, Error **errp) +{ + VirtIOInputHost *vih = VIRTIO_INPUT_HOST(dev); + + if (vih->fd > 0) { + qemu_set_fd_handler(vih->fd, NULL, NULL, NULL); + close(vih->fd); + } +} + +static const VMStateDescription vmstate_virtio_input_host = { + .name = "virtio-input-host", + .unmigratable = 1, +}; + +static Property virtio_input_host_properties[] = { + DEFINE_PROP_STRING("evdev", VirtIOInputHost, evdev), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_input_host_class_init(ObjectClass *klass, void *data) +{ + VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->vmsd = &vmstate_virtio_input_host; + dc->props = virtio_input_host_properties; + vic->realize = virtio_input_host_realize; + vic->unrealize = virtio_input_host_unrealize; +} + +static void virtio_input_host_init(Object *obj) +{ + VirtIOInput *vinput = VIRTIO_INPUT(obj); + + virtio_input_init_config(vinput, virtio_input_host_config); +} + +static const TypeInfo virtio_input_host_info = { + .name = TYPE_VIRTIO_INPUT_HOST, + .parent = TYPE_VIRTIO_INPUT, + .instance_size = sizeof(VirtIOInputHost), + .instance_init = virtio_input_host_init, + .class_init = virtio_input_host_class_init, +}; + +/* ----------------------------------------------------------------- */ + +static void virtio_register_types(void) +{ + type_register_static(&virtio_input_host_info); +} + +type_init(virtio_register_types) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index c69f066..e2e1eb5 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1997,6 +1997,14 @@ static void virtio_tablet_initfn(Object *obj) TYPE_VIRTIO_TABLET); } +static void virtio_host_initfn(Object *obj) +{ + VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_INPUT_HOST); +} + static const TypeInfo virtio_input_pci_info = { .name = TYPE_VIRTIO_INPUT_PCI, .parent = TYPE_VIRTIO_PCI, @@ -2035,6 +2043,13 @@ static const TypeInfo virtio_tablet_pci_info = { .instance_init = virtio_tablet_initfn, }; +static const TypeInfo virtio_host_pci_info = { + .name = TYPE_VIRTIO_INPUT_HOST_PCI, + .parent = TYPE_VIRTIO_INPUT_PCI, + .instance_size = sizeof(VirtIOInputHostPCI), + .instance_init = virtio_host_initfn, +}; + /* virtio-pci-bus */ static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, @@ -2081,6 +2096,7 @@ static void virtio_pci_register_types(void) type_register_static(&virtio_keyboard_pci_info); type_register_static(&virtio_mouse_pci_info); type_register_static(&virtio_tablet_pci_info); + type_register_static(&virtio_host_pci_info); type_register_static(&virtio_pci_bus_info); type_register_static(&virtio_pci_info); #ifdef CONFIG_VIRTFS diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index d962125..e7c8f22 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -42,6 +42,7 @@ typedef struct VHostSCSIPCI VHostSCSIPCI; typedef struct VirtIORngPCI VirtIORngPCI; typedef struct VirtIOInputPCI VirtIOInputPCI; typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI; +typedef struct VirtIOInputHostPCI VirtIOInputHostPCI; /* virtio-pci-bus */ @@ -261,6 +262,15 @@ struct VirtIOInputHIDPCI { VirtIOInputHID vdev; }; +#define TYPE_VIRTIO_INPUT_HOST_PCI "virtio-input-host-pci" +#define VIRTIO_INPUT_HOST_PCI(obj) \ + OBJECT_CHECK(VirtIOInputHostPCI, (obj), TYPE_VIRTIO_INPUT_HOST_PCI) + +struct VirtIOInputHostPCI { + VirtIOPCIProxy parent_obj; + VirtIOInputHost vdev; +}; + /* Virtio ABI version, if we increment this, we break the guest driver. */ #define VIRTIO_PCI_ABI_VERSION 0 diff --git a/include/hw/virtio/virtio-input.h b/include/hw/virtio/virtio-input.h index 8160dd6..fd5417d 100644 --- a/include/hw/virtio/virtio-input.h +++ b/include/hw/virtio/virtio-input.h @@ -50,10 +50,17 @@ typedef struct virtio_input_event virtio_input_event; #define VIRTIO_INPUT_HID_GET_PARENT_CLASS(obj) \ OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_INPUT_HID) +#define TYPE_VIRTIO_INPUT_HOST "virtio-input-host-device" +#define VIRTIO_INPUT_HOST(obj) \ + OBJECT_CHECK(VirtIOInputHost, (obj), TYPE_VIRTIO_INPUT_HOST) +#define VIRTIO_INPUT_HOST_GET_PARENT_CLASS(obj) \ + OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_INPUT_HOST) + typedef struct VirtIOInput VirtIOInput; typedef struct VirtIOInputClass VirtIOInputClass; typedef struct VirtIOInputConfig VirtIOInputConfig; typedef struct VirtIOInputHID VirtIOInputHID; +typedef struct VirtIOInputHost VirtIOInputHost; struct VirtIOInputConfig { virtio_input_config config; @@ -93,6 +100,12 @@ struct VirtIOInputHID { int ledstate; }; +struct VirtIOInputHost { + VirtIOInput parent_obj; + char *evdev; + int fd; +}; + void virtio_input_send(VirtIOInput *vinput, virtio_input_event *event); void virtio_input_init_config(VirtIOInput *vinput, virtio_input_config *config); -- 1.8.3.1