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 dbf2479e808e..2fb1dcbcb5aa 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]; | 
