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  */
35 struct 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 #define KVM_MAGIC_FEAT_SR		(1 << 0)
86 
87 /* MASn, ESR, PIR, and high SPRGs */
88 #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7	(1 << 1)
89 
90 
91 #endif /* _UAPI__POWERPC_KVM_PARA_H__ */
92