/* Things the lguest guest needs to know. Note: like all lguest interfaces,
* this is subject to wild and random change between versions. */
-#ifndef _ASM_LGUEST_H
-#define _ASM_LGUEST_H
+#ifndef _LINUX_LGUEST_H
+#define _LINUX_LGUEST_H
#ifndef __ASSEMBLY__
+#include <linux/time.h>
#include <asm/irq.h>
-
-#define LHCALL_FLUSH_ASYNC 0
-#define LHCALL_LGUEST_INIT 1
-#define LHCALL_CRASH 2
-#define LHCALL_LOAD_GDT 3
-#define LHCALL_NEW_PGTABLE 4
-#define LHCALL_FLUSH_TLB 5
-#define LHCALL_LOAD_IDT_ENTRY 6
-#define LHCALL_SET_STACK 7
-#define LHCALL_TS 8
-#define LHCALL_SET_CLOCKEVENT 9
-#define LHCALL_HALT 10
-#define LHCALL_GET_WALLCLOCK 11
-#define LHCALL_BIND_DMA 12
-#define LHCALL_SEND_DMA 13
-#define LHCALL_SET_PTE 14
-#define LHCALL_SET_PMD 15
-#define LHCALL_LOAD_TLS 16
+#include <asm/lguest_hcall.h>
#define LG_CLOCK_MIN_DELTA 100UL
#define LG_CLOCK_MAX_DELTA ULONG_MAX
-#define LGUEST_TRAP_ENTRY 0x1F
-
-static inline unsigned long
-hcall(unsigned long call,
- unsigned long arg1, unsigned long arg2, unsigned long arg3)
-{
- asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY)
- : "=a"(call)
- : "a"(call), "d"(arg1), "b"(arg2), "c"(arg3)
- : "memory");
- return call;
-}
-
-void async_hcall(unsigned long call,
- unsigned long arg1, unsigned long arg2, unsigned long arg3);
-
-/* Can't use our min() macro here: needs to be a constant */
-#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
-
-#define LHCALL_RING_SIZE 64
-struct hcall_ring
-{
- u32 eax, edx, ebx, ecx;
-};
-
-/* All the good stuff happens here: guest registers it with LGUEST_INIT */
+/*G:032 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
{
-/* Fields which change during running: */
- /* 512 == enabled (same as eflags) */
+ /* 512 == enabled (same as eflags in normal hardware). The Guest
+ * changes interrupts so often that a hypercall is too slow. */
unsigned int irq_enabled;
- /* Interrupts blocked by guest. */
+ /* Fine-grained interrupt disabling by the Guest */
DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS);
- /* Virtual address of page fault. */
+ /* 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;
- /* Async hypercall ring. 0xFF == done, 0 == pending. */
+ /* Wallclock time set by the Host. */
+ struct timespec time;
+
+ /* 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];
- struct hcall_ring hcalls[LHCALL_RING_SIZE];
+ /* The actual registers for the hypercalls. */
+ struct hcall_args hcalls[LHCALL_RING_SIZE];
-/* Fields initialized by the hypervisor at boot: */
+/* Fields initialized by the Host at boot: */
/* Memory not to try to access */
unsigned long reserve_mem;
- /* ID of this guest (used by network driver to set ethernet address) */
- u16 guestid;
/* KHz for the TSC clock. */
u32 tsc_khz;
+ /* Page where the top-level pagetable is */
+ unsigned long pgdir;
-/* Fields initialized by the guest at boot: */
+/* Fields initialized by the Guest at boot: */
/* Instruction range to suppress interrupts even if enabled */
unsigned long noirq_start, noirq_end;
+ /* 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 /* _ASM_LGUEST_H */
+#endif /* _LINUX_LGUEST_H */
git.openpandora.org / pandora-kernel.git / blobdiff