diff options
Diffstat (limited to 'include/linux/lguest.h')
-rw-r--r-- | include/linux/lguest.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/include/linux/lguest.h b/include/linux/lguest.h new file mode 100644 index 000000000000..f30c04fc22b7 --- /dev/null +++ b/include/linux/lguest.h | |||
@@ -0,0 +1,85 @@ | |||
1 | /* Things the lguest guest needs to know. Note: like all lguest interfaces, | ||
2 | * this is subject to wild and random change between versions. */ | ||
3 | #ifndef _ASM_LGUEST_H | ||
4 | #define _ASM_LGUEST_H | ||
5 | |||
6 | /* These are randomly chosen numbers which indicate we're an lguest at boot */ | ||
7 | #define LGUEST_MAGIC_EBP 0x4C687970 | ||
8 | #define LGUEST_MAGIC_EDI 0x652D4D65 | ||
9 | #define LGUEST_MAGIC_ESI 0xFFFFFFFF | ||
10 | |||
11 | #ifndef __ASSEMBLY__ | ||
12 | #include <asm/irq.h> | ||
13 | |||
14 | #define LHCALL_FLUSH_ASYNC 0 | ||
15 | #define LHCALL_LGUEST_INIT 1 | ||
16 | #define LHCALL_CRASH 2 | ||
17 | #define LHCALL_LOAD_GDT 3 | ||
18 | #define LHCALL_NEW_PGTABLE 4 | ||
19 | #define LHCALL_FLUSH_TLB 5 | ||
20 | #define LHCALL_LOAD_IDT_ENTRY 6 | ||
21 | #define LHCALL_SET_STACK 7 | ||
22 | #define LHCALL_TS 8 | ||
23 | #define LHCALL_TIMER_READ 9 | ||
24 | #define LHCALL_HALT 10 | ||
25 | #define LHCALL_GET_WALLCLOCK 11 | ||
26 | #define LHCALL_BIND_DMA 12 | ||
27 | #define LHCALL_SEND_DMA 13 | ||
28 | #define LHCALL_SET_PTE 14 | ||
29 | #define LHCALL_SET_PMD 15 | ||
30 | #define LHCALL_LOAD_TLS 16 | ||
31 | |||
32 | #define LGUEST_TRAP_ENTRY 0x1F | ||
33 | |||
34 | static inline unsigned long | ||
35 | hcall(unsigned long call, | ||
36 | unsigned long arg1, unsigned long arg2, unsigned long arg3) | ||
37 | { | ||
38 | asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY) | ||
39 | : "=a"(call) | ||
40 | : "a"(call), "d"(arg1), "b"(arg2), "c"(arg3) | ||
41 | : "memory"); | ||
42 | return call; | ||
43 | } | ||
44 | |||
45 | void async_hcall(unsigned long call, | ||
46 | unsigned long arg1, unsigned long arg2, unsigned long arg3); | ||
47 | |||
48 | /* Can't use our min() macro here: needs to be a constant */ | ||
49 | #define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32) | ||
50 | |||
51 | #define LHCALL_RING_SIZE 64 | ||
52 | struct hcall_ring | ||
53 | { | ||
54 | u32 eax, edx, ebx, ecx; | ||
55 | }; | ||
56 | |||
57 | /* All the good stuff happens here: guest registers it with LGUEST_INIT */ | ||
58 | struct lguest_data | ||
59 | { | ||
60 | /* Fields which change during running: */ | ||
61 | /* 512 == enabled (same as eflags) */ | ||
62 | unsigned int irq_enabled; | ||
63 | /* Interrupts blocked by guest. */ | ||
64 | DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS); | ||
65 | |||
66 | /* Virtual address of page fault. */ | ||
67 | unsigned long cr2; | ||
68 | |||
69 | /* Async hypercall ring. 0xFF == done, 0 == pending. */ | ||
70 | u8 hcall_status[LHCALL_RING_SIZE]; | ||
71 | struct hcall_ring hcalls[LHCALL_RING_SIZE]; | ||
72 | |||
73 | /* Fields initialized by the hypervisor at boot: */ | ||
74 | /* Memory not to try to access */ | ||
75 | unsigned long reserve_mem; | ||
76 | /* ID of this guest (used by network driver to set ethernet address) */ | ||
77 | u16 guestid; | ||
78 | |||
79 | /* Fields initialized by the guest at boot: */ | ||
80 | /* Instruction range to suppress interrupts even if enabled */ | ||
81 | unsigned long noirq_start, noirq_end; | ||
82 | }; | ||
83 | extern struct lguest_data lguest_data; | ||
84 | #endif /* __ASSEMBLY__ */ | ||
85 | #endif /* _ASM_LGUEST_H */ | ||