1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License, version 2, as
5 * published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
15 *
16 * Copyright IBM Corp. 2008
17 *
18 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
19 */
20
21#ifndef _UAPI__POWERPC_KVM_PARA_H__
22#define _UAPI__POWERPC_KVM_PARA_H__
23
24#include <linux/types.h>
25
26/*
27 * Additions to this struct must only occur at the end, and should be
28 * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
29 * (albeit not necessarily relevant to the current target hardware platform).
30 *
31 * Struct fields are always 32 or 64 bit aligned, depending on them being 32
32 * or 64 bit wide respectively.
33 *
34 * See Documentation/virt/kvm/ppc-pv.rst
35 */
36struct kvm_vcpu_arch_shared {
37	__u64 scratch1;
38	__u64 scratch2;
39	__u64 scratch3;
40	__u64 critical;		/* Guest may not get interrupts if == r1 */
41	__u64 sprg0;
42	__u64 sprg1;
43	__u64 sprg2;
44	__u64 sprg3;
45	__u64 srr0;
46	__u64 srr1;
47	__u64 dar;		/* dear on BookE */
48	__u64 msr;
49	__u32 dsisr;
50	__u32 int_pending;	/* Tells the guest if we have an interrupt */
51	__u32 sr[16];
52	__u32 mas0;
53	__u32 mas1;
54	__u64 mas7_3;
55	__u64 mas2;
56	__u32 mas4;
57	__u32 mas6;
58	__u32 esr;
59	__u32 pir;
60
61	/*
62	 * SPRG4-7 are user-readable, so we can only keep these consistent
63	 * between the shared area and the real registers when there's an
64	 * intervening exit to KVM.  This also applies to SPRG3 on some
65	 * chips.
66	 *
67	 * This suffices for access by guest userspace, since in PR-mode
68	 * KVM, an exit must occur when changing the guest's MSR[PR].
69	 * If the guest kernel writes to SPRG3-7 via the shared area, it
70	 * must also use the shared area for reading while in kernel space.
71	 */
72	__u64 sprg4;
73	__u64 sprg5;
74	__u64 sprg6;
75	__u64 sprg7;
76};
77
78#define KVM_SC_MAGIC_R0		0x4b564d21 /* "KVM!" */
79
80#define KVM_HCALL_TOKEN(num)     _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
81
82#include <asm/epapr_hcalls.h>
83
84#define KVM_FEATURE_MAGIC_PAGE	1
85
86/* Magic page flags from host to guest */
87
88#define KVM_MAGIC_FEAT_SR		(1 << 0)
89
90/* MASn, ESR, PIR, and high SPRGs */
91#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7	(1 << 1)
92
93/* Magic page flags from guest to host */
94
95#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX	(1 << 0)
96
97
98#endif /* _UAPI__POWERPC_KVM_PARA_H__ */
99