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1 | #ifndef _LINUX_LGUEST_LAUNCHER | |
2 | #define _LINUX_LGUEST_LAUNCHER | |
3 | /* Everything the "lguest" userspace program needs to know. */ | |
4 | #include <linux/types.h> | |
5 | ||
6 | /*D:010 | |
7 | * Drivers | |
8 | * | |
9 | * The Guest needs devices to do anything useful. Since we don't let it touch | |
10 | * real devices (think of the damage it could do!) we provide virtual devices. | |
11 | * We emulate a PCI bus with virtio devices on it; we used to have our own | |
12 | * lguest bus which was far simpler, but this tests the virtio 1.0 standard. | |
13 | * | |
14 | * Virtio devices are also used by kvm, so we can simply reuse their optimized | |
15 | * device drivers. And one day when everyone uses virtio, my plan will be | |
16 | * complete. Bwahahahah! | |
17 | */ | |
18 | ||
19 | /* Write command first word is a request. */ | |
20 | enum lguest_req | |
21 | { | |
22 | LHREQ_INITIALIZE, /* + base, pfnlimit, start */ | |
23 | LHREQ_GETDMA, /* No longer used */ | |
24 | LHREQ_IRQ, /* + irq */ | |
25 | LHREQ_BREAK, /* No longer used */ | |
26 | LHREQ_EVENTFD, /* No longer used. */ | |
27 | LHREQ_GETREG, /* + offset within struct pt_regs (then read value). */ | |
28 | LHREQ_SETREG, /* + offset within struct pt_regs, value. */ | |
29 | LHREQ_TRAP, /* + trap number to deliver to guest. */ | |
30 | }; | |
31 | ||
32 | /* | |
33 | * This is what read() of the lguest fd populates. trap == | |
34 | * LGUEST_TRAP_ENTRY for an LHCALL_NOTIFY (addr is the | |
35 | * argument), 14 for a page fault in the MMIO region (addr is | |
36 | * the trap address, insn is the instruction), or 13 for a GPF | |
37 | * (insn is the instruction). | |
38 | */ | |
39 | struct lguest_pending { | |
40 | __u8 trap; | |
41 | __u8 insn[7]; | |
42 | __u32 addr; | |
43 | }; | |
44 | #endif /* _LINUX_LGUEST_LAUNCHER */ |