[mirror_ubuntu-bionic-kernel.git] / arch / x86 / include / asm / lguest_hcall.h

/* Architecture specific portion of the lguest hypercalls */
#ifndef _ASM_X86_LGUEST_HCALL_H
#define _ASM_X86_LGUEST_HCALL_H

#define LHCALL_FLUSH_ASYNC	0
#define LHCALL_LGUEST_INIT	1
#define LHCALL_SHUTDOWN		2
#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
#define LHCALL_SET_PMD		15
#define LHCALL_LOAD_TLS		16
#define LHCALL_NOTIFY		17
#define LHCALL_LOAD_GDT_ENTRY	18

#define LGUEST_TRAP_ENTRY 0x1F

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

#ifndef __ASSEMBLY__
#include <asm/hw_irq.h>
#include <asm/kvm_para.h>

/*G:031 But first, how does our Guest contact the Host to ask for privileged
 * operations?  There are two ways: the direct way is to make a "hypercall",
 * to make requests of the Host Itself.
 *
 * We use the KVM hypercall mechanism. Eighteen hypercalls are
 * available: the hypercall number is put in the %eax register, and the
 * arguments (when required) are placed in %ebx, %ecx and %edx.  If a return
 * value makes sense, it's returned in %eax.
 *
 * 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
struct hcall_args {
	/* These map directly onto eax, ebx, ecx, edx in struct lguest_regs */
	unsigned long arg0, arg1, arg2, arg3;
};

#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_LGUEST_HCALL_H */
Commit	Line	Data
	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_PTE 14
	16	#define LHCALL_SET_PMD 15
	17	#define LHCALL_LOAD_TLS 16
	18	#define LHCALL_NOTIFY 17
	19	#define LHCALL_LOAD_GDT_ENTRY 18
	20
	21	#define LGUEST_TRAP_ENTRY 0x1F
	22
	23	/* Argument number 3 to LHCALL_LGUEST_SHUTDOWN */
	24	#define LGUEST_SHUTDOWN_POWEROFF 1
	25	#define LGUEST_SHUTDOWN_RESTART 2
	26
	27	#ifndef __ASSEMBLY__
	28	#include <asm/hw_irq.h>
	29	#include <asm/kvm_para.h>
	30
	31	/*G:031 But first, how does our Guest contact the Host to ask for privileged
	32	* operations? There are two ways: the direct way is to make a "hypercall",
	33	* to make requests of the Host Itself.
	34	*
	35	* We use the KVM hypercall mechanism. Eighteen hypercalls are
	36	* available: the hypercall number is put in the %eax register, and the
	37	* arguments (when required) are placed in %ebx, %ecx and %edx. If a return
	38	* value makes sense, it's returned in %eax.
	39	*
	40	* Grossly invalid calls result in Sudden Death at the hands of the vengeful
	41	* Host, rather than returning failure. This reflects Winston Churchill's
	42	* definition of a gentleman: "someone who is only rude intentionally". */
	43	/:/
	44
	45	/* Can't use our min() macro here: needs to be a constant */
	46	#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
	47
	48	#define LHCALL_RING_SIZE 64
	49	struct hcall_args {
	50	/* These map directly onto eax, ebx, ecx, edx in struct lguest_regs */
	51	unsigned long arg0, arg1, arg2, arg3;
	52	};
	53
	54	#endif /* !__ASSEMBLY__ */
	55	#endif /* _ASM_X86_LGUEST_HCALL_H */