diff options
Diffstat (limited to 'include/linux/lguest.h')
-rw-r--r-- | include/linux/lguest.h | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/include/linux/lguest.h b/include/linux/lguest.h index dbf2479e808..2fb1dcbcb5a 100644 --- a/include/linux/lguest.h +++ b/include/linux/lguest.h | |||
@@ -1,5 +1,7 @@ | |||
1 | /* Things the lguest guest needs to know. Note: like all lguest interfaces, | 1 | /* |
2 | * this is subject to wild and random change between versions. */ | 2 | * Things the lguest guest needs to know. Note: like all lguest interfaces, |
3 | * this is subject to wild and random change between versions. | ||
4 | */ | ||
3 | #ifndef _LINUX_LGUEST_H | 5 | #ifndef _LINUX_LGUEST_H |
4 | #define _LINUX_LGUEST_H | 6 | #define _LINUX_LGUEST_H |
5 | 7 | ||
@@ -11,32 +13,41 @@ | |||
11 | #define LG_CLOCK_MIN_DELTA 100UL | 13 | #define LG_CLOCK_MIN_DELTA 100UL |
12 | #define LG_CLOCK_MAX_DELTA ULONG_MAX | 14 | #define LG_CLOCK_MAX_DELTA ULONG_MAX |
13 | 15 | ||
14 | /*G:031 The second method of communicating with the Host is to via "struct | 16 | /*G:031 |
17 | * The second method of communicating with the Host is to via "struct | ||
15 | * lguest_data". Once the Guest's initialization hypercall tells the Host where | 18 | * lguest_data". Once the Guest's initialization hypercall tells the Host where |
16 | * this is, the Guest and Host both publish information in it. :*/ | 19 | * this is, the Guest and Host both publish information in it. |
17 | struct lguest_data | 20 | :*/ |
18 | { | 21 | struct lguest_data { |
19 | /* 512 == enabled (same as eflags in normal hardware). The Guest | 22 | /* |
20 | * changes interrupts so often that a hypercall is too slow. */ | 23 | * 512 == enabled (same as eflags in normal hardware). The Guest |
24 | * changes interrupts so often that a hypercall is too slow. | ||
25 | */ | ||
21 | unsigned int irq_enabled; | 26 | unsigned int irq_enabled; |
22 | /* Fine-grained interrupt disabling by the Guest */ | 27 | /* Fine-grained interrupt disabling by the Guest */ |
23 | DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS); | 28 | DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS); |
24 | 29 | ||
25 | /* The Host writes the virtual address of the last page fault here, | 30 | /* |
31 | * 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 | 32 | * which saves the Guest a hypercall. CR2 is the native register where |
27 | * this address would normally be found. */ | 33 | * this address would normally be found. |
34 | */ | ||
28 | unsigned long cr2; | 35 | unsigned long cr2; |
29 | 36 | ||
30 | /* Wallclock time set by the Host. */ | 37 | /* Wallclock time set by the Host. */ |
31 | struct timespec time; | 38 | struct timespec time; |
32 | 39 | ||
33 | /* Interrupt pending set by the Host. The Guest should do a hypercall | 40 | /* |
34 | * if it re-enables interrupts and sees this set (to X86_EFLAGS_IF). */ | 41 | * Interrupt pending set by the Host. The Guest should do a hypercall |
42 | * if it re-enables interrupts and sees this set (to X86_EFLAGS_IF). | ||
43 | */ | ||
35 | int irq_pending; | 44 | int irq_pending; |
36 | 45 | ||
37 | /* Async hypercall ring. Instead of directly making hypercalls, we can | 46 | /* |
47 | * Async hypercall ring. Instead of directly making hypercalls, we can | ||
38 | * place them in here for processing the next time the Host wants. | 48 | * place them in here for processing the next time the Host wants. |
39 | * This batching can be quite efficient. */ | 49 | * This batching can be quite efficient. |
50 | */ | ||
40 | 51 | ||
41 | /* 0xFF == done (set by Host), 0 == pending (set by Guest). */ | 52 | /* 0xFF == done (set by Host), 0 == pending (set by Guest). */ |
42 | u8 hcall_status[LHCALL_RING_SIZE]; | 53 | u8 hcall_status[LHCALL_RING_SIZE]; |