6cbf4c8c64
resend for bug fix related to removal of irqfd
Support an inter-vm shared memory device that maps a shared-memory object as a
PCI device in the guest. This patch also supports interrupts between guest by
communicating over a unix domain socket. This patch applies to the qemu-kvm
repository.
-device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]
Interrupts are supported between multiple VMs by using a shared memory server
by using a chardev socket.
-device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]
[,chardev=<id>][,msi=on][,ioeventfd=on][,vectors=n][,role=peer|master]
-chardev socket,path=<path>,id=<id>
The shared memory server, sample programs and init scripts are in a git repo here:
www.gitorious.org/nahanni
Signed-off-by: Cam Macdonell <cam@cs.ualberta.ca>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
#ifndef QEMU_CHAR_H
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#define QEMU_CHAR_H
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#include "qemu-common.h"
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#include "qemu-queue.h"
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#include "qemu-option.h"
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#include "qemu-config.h"
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#include "qobject.h"
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/* character device */
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#define CHR_EVENT_BREAK 0 /* serial break char */
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#define CHR_EVENT_FOCUS 1 /* focus to this terminal (modal input needed) */
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#define CHR_EVENT_OPENED 2 /* new connection established */
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#define CHR_EVENT_MUX_IN 3 /* mux-focus was set to this terminal */
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#define CHR_EVENT_MUX_OUT 4 /* mux-focus will move on */
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#define CHR_EVENT_CLOSED 5 /* connection closed */
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#define CHR_IOCTL_SERIAL_SET_PARAMS 1
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typedef struct {
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int speed;
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int parity;
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int data_bits;
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int stop_bits;
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} QEMUSerialSetParams;
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#define CHR_IOCTL_SERIAL_SET_BREAK 2
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#define CHR_IOCTL_PP_READ_DATA 3
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#define CHR_IOCTL_PP_WRITE_DATA 4
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#define CHR_IOCTL_PP_READ_CONTROL 5
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#define CHR_IOCTL_PP_WRITE_CONTROL 6
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#define CHR_IOCTL_PP_READ_STATUS 7
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#define CHR_IOCTL_PP_EPP_READ_ADDR 8
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#define CHR_IOCTL_PP_EPP_READ 9
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#define CHR_IOCTL_PP_EPP_WRITE_ADDR 10
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#define CHR_IOCTL_PP_EPP_WRITE 11
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#define CHR_IOCTL_PP_DATA_DIR 12
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#define CHR_IOCTL_SERIAL_SET_TIOCM 13
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#define CHR_IOCTL_SERIAL_GET_TIOCM 14
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#define CHR_TIOCM_CTS 0x020
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#define CHR_TIOCM_CAR 0x040
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#define CHR_TIOCM_DSR 0x100
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#define CHR_TIOCM_RI 0x080
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#define CHR_TIOCM_DTR 0x002
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#define CHR_TIOCM_RTS 0x004
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typedef void IOEventHandler(void *opaque, int event);
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struct CharDriverState {
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void (*init)(struct CharDriverState *s);
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int (*chr_write)(struct CharDriverState *s, const uint8_t *buf, int len);
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void (*chr_update_read_handler)(struct CharDriverState *s);
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int (*chr_ioctl)(struct CharDriverState *s, int cmd, void *arg);
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int (*get_msgfd)(struct CharDriverState *s);
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IOEventHandler *chr_event;
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IOCanReadHandler *chr_can_read;
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IOReadHandler *chr_read;
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void *handler_opaque;
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void (*chr_send_event)(struct CharDriverState *chr, int event);
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void (*chr_close)(struct CharDriverState *chr);
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void (*chr_accept_input)(struct CharDriverState *chr);
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void *opaque;
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QEMUBH *bh;
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char *label;
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char *filename;
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int opened;
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QTAILQ_ENTRY(CharDriverState) next;
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};
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QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
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CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
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void (*init)(struct CharDriverState *s));
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CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s));
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void qemu_chr_close(CharDriverState *chr);
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void qemu_chr_printf(CharDriverState *s, const char *fmt, ...);
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int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len);
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void qemu_chr_send_event(CharDriverState *s, int event);
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void qemu_chr_add_handlers(CharDriverState *s,
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IOCanReadHandler *fd_can_read,
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IOReadHandler *fd_read,
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IOEventHandler *fd_event,
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void *opaque);
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int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg);
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void qemu_chr_generic_open(CharDriverState *s);
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int qemu_chr_can_read(CharDriverState *s);
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void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len);
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int qemu_chr_get_msgfd(CharDriverState *s);
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void qemu_chr_accept_input(CharDriverState *s);
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void qemu_chr_info_print(Monitor *mon, const QObject *ret_data);
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void qemu_chr_info(Monitor *mon, QObject **ret_data);
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CharDriverState *qemu_chr_find(const char *name);
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/* add an eventfd to the qemu devices that are polled */
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CharDriverState *qemu_chr_open_eventfd(int eventfd);
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extern int term_escape_char;
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/* async I/O support */
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int qemu_set_fd_handler2(int fd,
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IOCanReadHandler *fd_read_poll,
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IOHandler *fd_read,
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IOHandler *fd_write,
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void *opaque);
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int qemu_set_fd_handler(int fd,
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IOHandler *fd_read,
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IOHandler *fd_write,
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void *opaque);
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#endif
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