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 */
36 struct 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
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