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07ad157f RR |
1 | /* Things the lguest guest needs to know. Note: like all lguest interfaces, |
2 | * this is subject to wild and random change between versions. */ | |
c37ae93d JS |
3 | #ifndef _LINUX_LGUEST_H |
4 | #define _LINUX_LGUEST_H | |
07ad157f | 5 | |
07ad157f | 6 | #ifndef __ASSEMBLY__ |
47aee45a | 7 | #include <linux/time.h> |
07ad157f | 8 | #include <asm/irq.h> |
c37ae93d | 9 | #include <asm/lguest_hcall.h> |
07ad157f | 10 | |
d7e28ffe RR |
11 | #define LG_CLOCK_MIN_DELTA 100UL |
12 | #define LG_CLOCK_MAX_DELTA ULONG_MAX | |
13 | ||
b2b47c21 RR |
14 | /*G:032 The second method of communicating with the Host is to via "struct |
15 | * lguest_data". The Guest's very first hypercall is to tell the Host where | |
16 | * this is, and then the Guest and Host both publish information in it. :*/ | |
07ad157f RR |
17 | struct lguest_data |
18 | { | |
b2b47c21 RR |
19 | /* 512 == enabled (same as eflags in normal hardware). The Guest |
20 | * changes interrupts so often that a hypercall is too slow. */ | |
07ad157f | 21 | unsigned int irq_enabled; |
b2b47c21 | 22 | /* Fine-grained interrupt disabling by the Guest */ |
07ad157f RR |
23 | DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS); |
24 | ||
b2b47c21 RR |
25 | /* The Host writes the virtual address of the last page fault here, |
26 | * which saves the Guest a hypercall. CR2 is the native register where | |
27 | * this address would normally be found. */ | |
07ad157f RR |
28 | unsigned long cr2; |
29 | ||
6c8dca5d RR |
30 | /* Wallclock time set by the Host. */ |
31 | struct timespec time; | |
32 | ||
b2b47c21 RR |
33 | /* Async hypercall ring. Instead of directly making hypercalls, we can |
34 | * place them in here for processing the next time the Host wants. | |
35 | * This batching can be quite efficient. */ | |
36 | ||
37 | /* 0xFF == done (set by Host), 0 == pending (set by Guest). */ | |
07ad157f | 38 | u8 hcall_status[LHCALL_RING_SIZE]; |
b2b47c21 | 39 | /* The actual registers for the hypercalls. */ |
b410e7b1 | 40 | struct hcall_args hcalls[LHCALL_RING_SIZE]; |
07ad157f | 41 | |
b2b47c21 | 42 | /* Fields initialized by the Host at boot: */ |
07ad157f RR |
43 | /* Memory not to try to access */ |
44 | unsigned long reserve_mem; | |
d7e28ffe RR |
45 | /* KHz for the TSC clock. */ |
46 | u32 tsc_khz; | |
47436aa4 RR |
47 | /* Page where the top-level pagetable is */ |
48 | unsigned long pgdir; | |
07ad157f | 49 | |
b2b47c21 | 50 | /* Fields initialized by the Guest at boot: */ |
07ad157f RR |
51 | /* Instruction range to suppress interrupts even if enabled */ |
52 | unsigned long noirq_start, noirq_end; | |
47436aa4 RR |
53 | /* Address above which page tables are all identical. */ |
54 | unsigned long kernel_address; | |
c18acd73 RR |
55 | /* The vector to try to use for system calls (0x40 or 0x80). */ |
56 | unsigned int syscall_vec; | |
07ad157f RR |
57 | }; |
58 | extern struct lguest_data lguest_data; | |
59 | #endif /* __ASSEMBLY__ */ | |
c37ae93d | 60 | #endif /* _LINUX_LGUEST_H */ |