vmm_lapic.h revision 261088 
1/*-
2 * Copyright (c) 2011 NetApp, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/sys/amd64/vmm/vmm_lapic.h 261088 2014-01-23 20:21:39Z jhb $
27 */
28
29#ifndef _VMM_LAPIC_H_
30#define	_VMM_LAPIC_H_
31
32struct vm;
33
34boolean_t lapic_msr(u_int num);
35int	lapic_rdmsr(struct vm *vm, int cpu, u_int msr, uint64_t *rval);
36int	lapic_wrmsr(struct vm *vm, int cpu, u_int msr, uint64_t wval);
37
38int	lapic_mmio_read(void *vm, int cpu, uint64_t gpa,
39			uint64_t *rval, int size, void *arg);
40int	lapic_mmio_write(void *vm, int cpu, uint64_t gpa,
41			 uint64_t wval, int size, void *arg);
42
43int	lapic_timer_tick(struct vm *vm, int cpu);
44
45/*
46 * Returns a vector between 32 and 255 if an interrupt is pending in the
47 * IRR that can be delivered based on the current state of ISR and TPR.
48 *
49 * Note that the vector does not automatically transition to the ISR as a
50 * result of calling this function.
51 *
52 * Returns -1 if there is no eligible vector that can be delivered to the
53 * guest at this time.
54 */
55int	lapic_pending_intr(struct vm *vm, int cpu);
56
57/*
58 * Transition 'vector' from IRR to ISR. This function is called with the
59 * vector returned by 'lapic_pending_intr()' when the guest is able to
60 * accept this interrupt (i.e. RFLAGS.IF = 1 and no conditions exist that
61 * block interrupt delivery).
62 */
63void	lapic_intr_accepted(struct vm *vm, int cpu, int vector);
64
65/*
66 * Signals to the LAPIC that an interrupt at 'vector' needs to be generated
67 * to the 'cpu', the state is recorded in IRR.
68 */
69int	lapic_set_intr(struct vm *vm, int cpu, int vector, bool trig);
70
71#define	LAPIC_TRIG_LEVEL	true
72#define	LAPIC_TRIG_EDGE		false
73static __inline int
74lapic_intr_level(struct vm *vm, int cpu, int vector)
75{
76
77	return (lapic_set_intr(vm, cpu, vector, LAPIC_TRIG_LEVEL));
78}
79
80static __inline int
81lapic_intr_edge(struct vm *vm, int cpu, int vector)
82{
83
84	return (lapic_set_intr(vm, cpu, vector, LAPIC_TRIG_EDGE));
85}
86
87#endif
88