Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 1 | /* Things the lguest guest needs to know. Note: like all lguest interfaces, |
| 2 | * this is subject to wild and random change between versions. */ |
Jes Sorensen | c37ae93 | 2007-10-22 10:56:26 +1000 | [diff] [blame] | 3 | #ifndef _LINUX_LGUEST_H |
| 4 | #define _LINUX_LGUEST_H |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 5 | |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 6 | #ifndef __ASSEMBLY__ |
Jes Sorensen | 47aee45 | 2007-10-22 11:03:33 +1000 | [diff] [blame] | 7 | #include <linux/time.h> |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 8 | #include <asm/irq.h> |
Jes Sorensen | c37ae93 | 2007-10-22 10:56:26 +1000 | [diff] [blame] | 9 | #include <asm/lguest_hcall.h> |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 10 | |
Rusty Russell | d7e28ff | 2007-07-19 01:49:23 -0700 | [diff] [blame] | 11 | #define LG_CLOCK_MIN_DELTA 100UL |
| 12 | #define LG_CLOCK_MAX_DELTA ULONG_MAX |
| 13 | |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 14 | /*G:032 The second method of communicating with the Host is to via "struct |
Rusty Russell | e1e7296 | 2007-10-25 15:02:50 +1000 | [diff] [blame] | 15 | * lguest_data". Once the Guest's initialization hypercall tells the Host where |
| 16 | * this is, the Guest and Host both publish information in it. :*/ |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 17 | struct lguest_data |
| 18 | { |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 19 | /* 512 == enabled (same as eflags in normal hardware). The Guest |
| 20 | * changes interrupts so often that a hypercall is too slow. */ |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 21 | unsigned int irq_enabled; |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 22 | /* Fine-grained interrupt disabling by the Guest */ |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 23 | DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS); |
| 24 | |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 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. */ |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 28 | unsigned long cr2; |
| 29 | |
Rusty Russell | 6c8dca5 | 2007-07-27 13:42:52 +1000 | [diff] [blame] | 30 | /* Wallclock time set by the Host. */ |
| 31 | struct timespec time; |
| 32 | |
Rusty Russell | a32a881 | 2009-06-12 22:27:02 -0600 | [diff] [blame] | 33 | /* Interrupt pending set by the Host. The Guest should do a hypercall |
| 34 | * if it re-enables interrupts and sees this set (to X86_EFLAGS_IF). */ |
| 35 | int irq_pending; |
| 36 | |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 37 | /* Async hypercall ring. Instead of directly making hypercalls, we can |
| 38 | * place them in here for processing the next time the Host wants. |
| 39 | * This batching can be quite efficient. */ |
| 40 | |
| 41 | /* 0xFF == done (set by Host), 0 == pending (set by Guest). */ |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 42 | u8 hcall_status[LHCALL_RING_SIZE]; |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 43 | /* The actual registers for the hypercalls. */ |
Jes Sorensen | b410e7b | 2007-10-22 11:03:31 +1000 | [diff] [blame] | 44 | struct hcall_args hcalls[LHCALL_RING_SIZE]; |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 45 | |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 46 | /* Fields initialized by the Host at boot: */ |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 47 | /* Memory not to try to access */ |
| 48 | unsigned long reserve_mem; |
Rusty Russell | d7e28ff | 2007-07-19 01:49:23 -0700 | [diff] [blame] | 49 | /* KHz for the TSC clock. */ |
| 50 | u32 tsc_khz; |
Rusty Russell | 47436aa | 2007-10-22 11:03:36 +1000 | [diff] [blame] | 51 | /* Page where the top-level pagetable is */ |
| 52 | unsigned long pgdir; |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 53 | |
Rusty Russell | b2b47c2 | 2007-07-26 10:41:02 -0700 | [diff] [blame] | 54 | /* Fields initialized by the Guest at boot: */ |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 55 | /* Instruction range to suppress interrupts even if enabled */ |
| 56 | unsigned long noirq_start, noirq_end; |
Rusty Russell | 47436aa | 2007-10-22 11:03:36 +1000 | [diff] [blame] | 57 | /* Address above which page tables are all identical. */ |
| 58 | unsigned long kernel_address; |
Rusty Russell | c18acd7 | 2007-10-22 11:03:35 +1000 | [diff] [blame] | 59 | /* The vector to try to use for system calls (0x40 or 0x80). */ |
| 60 | unsigned int syscall_vec; |
Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame] | 61 | }; |
| 62 | extern struct lguest_data lguest_data; |
| 63 | #endif /* __ASSEMBLY__ */ |
Jes Sorensen | c37ae93 | 2007-10-22 10:56:26 +1000 | [diff] [blame] | 64 | #endif /* _LINUX_LGUEST_H */ |