1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2013 Anish Gupta (akgupt3@gmail.com)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice unmodified, this list of conditions, and the following
12 *    disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#ifndef _SVM_SOFTC_H_
32#define _SVM_SOFTC_H_
33
34#define SVM_IO_BITMAP_SIZE	(3 * PAGE_SIZE)
35#define SVM_MSR_BITMAP_SIZE	(2 * PAGE_SIZE)
36
37struct asid {
38	uint64_t	gen;	/* range is [1, ~0UL] */
39	uint32_t	num;	/* range is [1, nasid - 1] */
40};
41
42/*
43 * XXX separate out 'struct vmcb' from 'svm_vcpu' to avoid wasting space
44 * due to VMCB alignment requirements.
45 */
46struct svm_vcpu {
47	struct vmcb	vmcb;	 /* hardware saved vcpu context */
48	struct svm_regctx swctx; /* software saved vcpu context */
49	uint64_t	vmcb_pa; /* VMCB physical address */
50	uint64_t	nextrip; /* next instruction to be executed by guest */
51        int		lastcpu; /* host cpu that the vcpu last ran on */
52	uint32_t	dirty;	 /* state cache bits that must be cleared */
53	long		eptgen;	 /* pmap->pm_eptgen when the vcpu last ran */
54	struct asid	asid;
55} __aligned(PAGE_SIZE);
56
57/*
58 * SVM softc, one per virtual machine.
59 */
60struct svm_softc {
61	uint8_t apic_page[VM_MAXCPU][PAGE_SIZE];
62	struct svm_vcpu vcpu[VM_MAXCPU];
63	vm_offset_t 	nptp;			    /* nested page table */
64	uint8_t		*iopm_bitmap;    /* shared by all vcpus */
65	uint8_t		*msr_bitmap;    /* shared by all vcpus */
66	struct vm	*vm;
67};
68
69CTASSERT((offsetof(struct svm_softc, nptp) & PAGE_MASK) == 0);
70
71static __inline struct svm_vcpu *
72svm_get_vcpu(struct svm_softc *sc, int vcpu)
73{
74
75	return (&(sc->vcpu[vcpu]));
76}
77
78static __inline struct vmcb *
79svm_get_vmcb(struct svm_softc *sc, int vcpu)
80{
81
82	return (&(sc->vcpu[vcpu].vmcb));
83}
84
85static __inline struct vmcb_state *
86svm_get_vmcb_state(struct svm_softc *sc, int vcpu)
87{
88
89	return (&(sc->vcpu[vcpu].vmcb.state));
90}
91
92static __inline struct vmcb_ctrl *
93svm_get_vmcb_ctrl(struct svm_softc *sc, int vcpu)
94{
95
96	return (&(sc->vcpu[vcpu].vmcb.ctrl));
97}
98
99static __inline struct svm_regctx *
100svm_get_guest_regctx(struct svm_softc *sc, int vcpu)
101{
102
103	return (&(sc->vcpu[vcpu].swctx));
104}
105
106static __inline void
107svm_set_dirty(struct svm_softc *sc, int vcpu, uint32_t dirtybits)
108{
109        struct svm_vcpu *vcpustate;
110
111        vcpustate = svm_get_vcpu(sc, vcpu);
112
113        vcpustate->dirty |= dirtybits;
114}
115
116#endif /* _SVM_SOFTC_H_ */
117