arch/x86/include/asm/lguest_hcall.h

   1 /* Architecture specific portion of the lguest hypercalls */
   2 #ifndef _ASM_X86_LGUEST_HCALL_H
   3 #define _ASM_X86_LGUEST_HCALL_H
   4
   5 #define LHCALL_FLUSH_ASYNC      0
   6 #define LHCALL_LGUEST_INIT      1
   7 #define LHCALL_SHUTDOWN         2
   8 #define LHCALL_NEW_PGTABLE      4
   9 #define LHCALL_FLUSH_TLB        5
  10 #define LHCALL_LOAD_IDT_ENTRY   6
  11 #define LHCALL_SET_STACK        7
  12 #define LHCALL_TS               8
  13 #define LHCALL_SET_CLOCKEVENT   9
  14 #define LHCALL_HALT             10
  15 #define LHCALL_SET_PMD          13
  16 #define LHCALL_SET_PTE          14
  17 #define LHCALL_SET_PGD          15
  18 #define LHCALL_LOAD_TLS         16
  19 #define LHCALL_NOTIFY           17
  20 #define LHCALL_LOAD_GDT_ENTRY   18
  21 #define LHCALL_SEND_INTERRUPTS  19
  22
  23 #define LGUEST_TRAP_ENTRY 0x1F
  24
  25 /* Argument number 3 to LHCALL_LGUEST_SHUTDOWN */
  26 #define LGUEST_SHUTDOWN_POWEROFF        1
  27 #define LGUEST_SHUTDOWN_RESTART         2
  28
  29 #ifndef __ASSEMBLY__
  30 #include <asm/hw_irq.h>
  31 #include <asm/kvm_para.h>
  32
  33 /*G:030 But first, how does our Guest contact the Host to ask for privileged
  34  * operations?  There are two ways: the direct way is to make a "hypercall",
  35  * to make requests of the Host Itself.
  36  *
  37  * We use the KVM hypercall mechanism. Seventeen hypercalls are
  38  * available: the hypercall number is put in the %eax register, and the
  39  * arguments (when required) are placed in %ebx, %ecx, %edx and %esi.
  40  * If a return value makes sense, it's returned in %eax.
  41  *
  42  * Grossly invalid calls result in Sudden Death at the hands of the vengeful
  43  * Host, rather than returning failure.  This reflects Winston Churchill's
  44  * definition of a gentleman: "someone who is only rude intentionally". */
  45 /*:*/
  46
  47 /* Can't use our min() macro here: needs to be a constant */
  48 #define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
  49
  50 #define LHCALL_RING_SIZE 64
  51 struct hcall_args {
  52         /* These map directly onto eax, ebx, ecx, edx and esi
  53          * in struct lguest_regs */
  54         unsigned long arg0, arg1, arg2, arg3, arg4;
  55 };
  56
  57 #endif /* !__ASSEMBLY__ */
  58 #endif /* _ASM_X86_LGUEST_HCALL_H */