[deliverable/linux.git] / include / linux / lguest_launcher.h

#ifndef _LINUX_LGUEST_LAUNCHER
#define _LINUX_LGUEST_LAUNCHER
/* Everything the "lguest" userspace program needs to know. */
#include <linux/types.h>

/*D:010
 * Drivers
 *
 * The Guest needs devices to do anything useful.  Since we don't let it touch
 * real devices (think of the damage it could do!) we provide virtual devices.
 * We emulate a PCI bus with virtio devices on it; we used to have our own
 * lguest bus which was far simpler, but this tests the virtio 1.0 standard.
 *
 * Virtio devices are also used by kvm, so we can simply reuse their optimized
 * device drivers.  And one day when everyone uses virtio, my plan will be
 * complete.  Bwahahahah!
 */

/* Write command first word is a request. */
enum lguest_req
{
	LHREQ_INITIALIZE, /* + base, pfnlimit, start */
	LHREQ_GETDMA, /* No longer used */
	LHREQ_IRQ, /* + irq */
	LHREQ_BREAK, /* No longer used */
	LHREQ_EVENTFD, /* No longer used. */
	LHREQ_GETREG, /* + offset within struct pt_regs (then read value). */
	LHREQ_SETREG, /* + offset within struct pt_regs, value. */
	LHREQ_TRAP, /* + trap number to deliver to guest. */
};

/*
 * This is what read() of the lguest fd populates.  trap ==
 * LGUEST_TRAP_ENTRY for an LHCALL_NOTIFY (addr is the
 * argument), 14 for a page fault in the MMIO region (addr is
 * the trap address, insn is the instruction), or 13 for a GPF
 * (insn is the instruction).
 */
struct lguest_pending {
	__u8 trap;
	__u8 insn[7];
	__u32 addr;
};
#endif /* _LINUX_LGUEST_LAUNCHER */
Commit	Line	Data
7334492b RR	1	#ifndef _LINUX_LGUEST_LAUNCHER
7334492b RR	2	#define _LINUX_LGUEST_LAUNCHER
d7e28ffe	3	/* Everything the "lguest" userspace program needs to know. */
b45d8cb0	4	#include <linux/types.h>
d7e28ffe	5
e2c97843 RR	6	/*D:010
	7	* Drivers
	8	*
	9	* The Guest needs devices to do anything useful. Since we don't let it touch
	10	* real devices (think of the damage it could do!) we provide virtual devices.
b3e28b65 RR	11	* We emulate a PCI bus with virtio devices on it; we used to have our own
b3e28b65 RR	12	* lguest bus which was far simpler, but this tests the virtio 1.0 standard.
e2c97843	13	*
a6bd8e13 RR	14	* Virtio devices are also used by kvm, so we can simply reuse their optimized
	15	* device drivers. And one day when everyone uses virtio, my plan will be
	16	* complete. Bwahahahah!
2e04ef76	17	*/
d7e28ffe RR	18
	19	/* Write command first word is a request. */
	20	enum lguest_req
	21	{
58a24566	22	LHREQ_INITIALIZE, /* + base, pfnlimit, start */
15045275	23	LHREQ_GETDMA, /* No longer used */
d7e28ffe	24	LHREQ_IRQ, /* + irq */
5dac051b	25	LHREQ_BREAK, /* No longer used */
d9bab50a	26	LHREQ_EVENTFD, /* No longer used. */
18c13737 RR	27	LHREQ_GETREG, /* + offset within struct pt_regs (then read value). */
18c13737 RR	28	LHREQ_SETREG, /* + offset within struct pt_regs, value. */
8ed31300	29	LHREQ_TRAP, /* + trap number to deliver to guest. */
d7e28ffe	30	};
2966af73	31
69a09dc1 RR	32	/*
	33	* This is what read() of the lguest fd populates. trap ==
	34	* LGUEST_TRAP_ENTRY for an LHCALL_NOTIFY (addr is the
	35	* argument), 14 for a page fault in the MMIO region (addr is
	36	* the trap address, insn is the instruction), or 13 for a GPF
	37	* (insn is the instruction).
	38	*/
	39	struct lguest_pending {
	40	__u8 trap;
	41	__u8 insn[7];
	42	__u32 addr;
	43	};
7334492b	44	#endif /* _LINUX_LGUEST_LAUNCHER */