lguest_hcall.h 1.81 KB
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/* Architecture specific portion of the lguest hypercalls */
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#ifndef _ASM_X86_LGUEST_HCALL_H
#define _ASM_X86_LGUEST_HCALL_H
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#define LHCALL_FLUSH_ASYNC	0
#define LHCALL_LGUEST_INIT	1
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#define LHCALL_SHUTDOWN		2
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#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_SET_PTE		14
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#define LHCALL_SET_PGD		15
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#define LHCALL_LOAD_TLS		16
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#define LHCALL_NOTIFY		17
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#define LHCALL_LOAD_GDT_ENTRY	18
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#define LHCALL_SEND_INTERRUPTS	19
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#define LGUEST_TRAP_ENTRY 0x1F

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/* Argument number 3 to LHCALL_LGUEST_SHUTDOWN */
#define LGUEST_SHUTDOWN_POWEROFF	1
#define LGUEST_SHUTDOWN_RESTART		2

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#ifndef __ASSEMBLY__
#include <asm/hw_irq.h>
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#include <asm/kvm_para.h>
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/*G:031 But first, how does our Guest contact the Host to ask for privileged
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 * operations?  There are two ways: the direct way is to make a "hypercall",
 * to make requests of the Host Itself.
 *
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 * We use the KVM hypercall mechanism. Eighteen hypercalls are
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 * available: the hypercall number is put in the %eax register, and the
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 * arguments (when required) are placed in %ebx, %ecx, %edx and %esi.
 * If a return value makes sense, it's returned in %eax.
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 *
 * Grossly invalid calls result in Sudden Death at the hands of the vengeful
 * Host, rather than returning failure.  This reflects Winston Churchill's
 * definition of a gentleman: "someone who is only rude intentionally". */
/*:*/

/* 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
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struct hcall_args {
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	/* These map directly onto eax, ebx, ecx, edx and esi
	 * in struct lguest_regs */
	unsigned long arg0, arg1, arg2, arg3, arg4;
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};
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_LGUEST_HCALL_H */