/*
|
* Things the lguest guest needs to know. Note: like all lguest interfaces,
|
* this is subject to wild and random change between versions.
|
*/
|
#ifndef _LINUX_LGUEST_H
|
#define _LINUX_LGUEST_H
|
|
#ifndef __ASSEMBLY__
|
#include <linux/time.h>
|
#include <asm/irq.h>
|
#include <asm/lguest_hcall.h>
|
|
#define LG_CLOCK_MIN_DELTA 100UL
|
#define LG_CLOCK_MAX_DELTA ULONG_MAX
|
|
/*G:031
|
* The second method of communicating with the Host is to via "struct
|
* lguest_data". Once the Guest's initialization hypercall tells the Host where
|
* this is, the Guest and Host both publish information in it.
|
:*/
|
struct lguest_data {
|
/*
|
* 512 == enabled (same as eflags in normal hardware). The Guest
|
* changes interrupts so often that a hypercall is too slow.
|
*/
|
unsigned int irq_enabled;
|
/* Fine-grained interrupt disabling by the Guest */
|
DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS);
|
|
/*
|
* The Host writes the virtual address of the last page fault here,
|
* which saves the Guest a hypercall. CR2 is the native register where
|
* this address would normally be found.
|
*/
|
unsigned long cr2;
|
|
/* Wallclock time set by the Host. */
|
struct timespec time;
|
|
/*
|
* Interrupt pending set by the Host. The Guest should do a hypercall
|
* if it re-enables interrupts and sees this set (to X86_EFLAGS_IF).
|
*/
|
int irq_pending;
|
|
/*
|
* Async hypercall ring. Instead of directly making hypercalls, we can
|
* place them in here for processing the next time the Host wants.
|
* This batching can be quite efficient.
|
*/
|
|
/* 0xFF == done (set by Host), 0 == pending (set by Guest). */
|
u8 hcall_status[LHCALL_RING_SIZE];
|
/* The actual registers for the hypercalls. */
|
struct hcall_args hcalls[LHCALL_RING_SIZE];
|
|
/* Fields initialized by the Host at boot: */
|
/* Memory not to try to access */
|
unsigned long reserve_mem;
|
/* KHz for the TSC clock. */
|
u32 tsc_khz;
|
|
/* Fields initialized by the Guest at boot: */
|
/* Instruction to suppress interrupts even if enabled */
|
unsigned long noirq_iret;
|
/* Address above which page tables are all identical. */
|
unsigned long kernel_address;
|
/* The vector to try to use for system calls (0x40 or 0x80). */
|
unsigned int syscall_vec;
|
};
|
extern struct lguest_data lguest_data;
|
#endif /* __ASSEMBLY__ */
|
#endif /* _LINUX_LGUEST_H */
|
