diff options
Diffstat (limited to 'include/linux/lguest_launcher.h')
| -rw-r--r-- | include/linux/lguest_launcher.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/linux/lguest_launcher.h b/include/linux/lguest_launcher.h new file mode 100644 index 000000000..acd5b1256 --- /dev/null +++ b/include/linux/lguest_launcher.h @@ -0,0 +1,44 @@ +#ifndef _LINUX_LGUEST_LAUNCHER +#define _LINUX_LGUEST_LAUNCHER +/* Everything the "lguest" userspace program needs to know. */ +#include <linux/types.h> + +/*D:010 + * Drivers + * + * The Guest needs devices to do anything useful. Since we don't let it touch + * real devices (think of the damage it could do!) we provide virtual devices. + * We emulate a PCI bus with virtio devices on it; we used to have our own + * lguest bus which was far simpler, but this tests the virtio 1.0 standard. + * + * Virtio devices are also used by kvm, so we can simply reuse their optimized + * device drivers. And one day when everyone uses virtio, my plan will be + * complete. Bwahahahah! + */ + +/* Write command first word is a request. */ +enum lguest_req +{ + LHREQ_INITIALIZE, /* + base, pfnlimit, start */ + LHREQ_GETDMA, /* No longer used */ + LHREQ_IRQ, /* + irq */ + LHREQ_BREAK, /* No longer used */ + LHREQ_EVENTFD, /* No longer used. */ + LHREQ_GETREG, /* + offset within struct pt_regs (then read value). */ + LHREQ_SETREG, /* + offset within struct pt_regs, value. */ + LHREQ_TRAP, /* + trap number to deliver to guest. */ +}; + +/* + * This is what read() of the lguest fd populates. trap == + * LGUEST_TRAP_ENTRY for an LHCALL_NOTIFY (addr is the + * argument), 14 for a page fault in the MMIO region (addr is + * the trap address, insn is the instruction), or 13 for a GPF + * (insn is the instruction). + */ +struct lguest_pending { + __u8 trap; + __u8 insn[7]; + __u32 addr; +}; +#endif /* _LINUX_LGUEST_LAUNCHER */ |