1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2008
16 *
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 */
19
20#ifndef _UAPI__POWERPC_KVM_PARA_H__
21#define _UAPI__POWERPC_KVM_PARA_H__
22
23#include <linux/types.h>
24
25/*
26 * Additions to this struct must only occur at the end, and should be
27 * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
28 * (albeit not necessarily relevant to the current target hardware platform).
29 *
30 * Struct fields are always 32 or 64 bit aligned, depending on them being 32
31 * or 64 bit wide respectively.
32 *
33 * See Documentation/virtual/kvm/ppc-pv.txt
34 */
35struct kvm_vcpu_arch_shared {
36	__u64 scratch1;
37	__u64 scratch2;
38	__u64 scratch3;
39	__u64 critical;		/* Guest may not get interrupts if == r1 */
40	__u64 sprg0;
41	__u64 sprg1;
42	__u64 sprg2;
43	__u64 sprg3;
44	__u64 srr0;
45	__u64 srr1;
46	__u64 dar;		/* dear on BookE */
47	__u64 msr;
48	__u32 dsisr;
49	__u32 int_pending;	/* Tells the guest if we have an interrupt */
50	__u32 sr[16];
51	__u32 mas0;
52	__u32 mas1;
53	__u64 mas7_3;
54	__u64 mas2;
55	__u32 mas4;
56	__u32 mas6;
57	__u32 esr;
58	__u32 pir;
59
60	/*
61	 * SPRG4-7 are user-readable, so we can only keep these consistent
62	 * between the shared area and the real registers when there's an
63	 * intervening exit to KVM.  This also applies to SPRG3 on some
64	 * chips.
65	 *
66	 * This suffices for access by guest userspace, since in PR-mode
67	 * KVM, an exit must occur when changing the guest's MSR[PR].
68	 * If the guest kernel writes to SPRG3-7 via the shared area, it
69	 * must also use the shared area for reading while in kernel space.
70	 */
71	__u64 sprg4;
72	__u64 sprg5;
73	__u64 sprg6;
74	__u64 sprg7;
75};
76
77#define KVM_SC_MAGIC_R0		0x4b564d21 /* "KVM!" */
78
79#define KVM_HCALL_TOKEN(num)     _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
80
81#include <asm/epapr_hcalls.h>
82
83#define KVM_FEATURE_MAGIC_PAGE	1
84
85/* Magic page flags from host to guest */
86
87#define KVM_MAGIC_FEAT_SR		(1 << 0)
88
89/* MASn, ESR, PIR, and high SPRGs */
90#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7	(1 << 1)
91
92/* Magic page flags from guest to host */
93
94#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX	(1 << 0)
95
96
97#endif /* _UAPI__POWERPC_KVM_PARA_H__ */
98