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 SUSE Linux Products GmbH 2009
16  *
17  * Authors: Alexander Graf <agraf@suse.de>
18  */
19 
20 #ifndef __ASM_KVM_BOOK3S_ASM_H__
21 #define __ASM_KVM_BOOK3S_ASM_H__
22 
23 /* XICS ICP register offsets */
24 #define XICS_XIRR		4
25 #define XICS_MFRR		0xc
26 #define XICS_IPI		2	/* interrupt source # for IPIs */
27 
28 /* Maximum number of threads per physical core */
29 #define MAX_SMT_THREADS		8
30 
31 /* Maximum number of subcores per physical core */
32 #define MAX_SUBCORES		4
33 
34 #ifdef __ASSEMBLY__
35 
36 #ifdef CONFIG_KVM_BOOK3S_HANDLER
37 
38 #include <asm/kvm_asm.h>
39 
40 .macro DO_KVM intno
41 	.if (\intno == BOOK3S_INTERRUPT_SYSTEM_RESET) || \
42 	    (\intno == BOOK3S_INTERRUPT_MACHINE_CHECK) || \
43 	    (\intno == BOOK3S_INTERRUPT_DATA_STORAGE) || \
44 	    (\intno == BOOK3S_INTERRUPT_INST_STORAGE) || \
45 	    (\intno == BOOK3S_INTERRUPT_DATA_SEGMENT) || \
46 	    (\intno == BOOK3S_INTERRUPT_INST_SEGMENT) || \
47 	    (\intno == BOOK3S_INTERRUPT_EXTERNAL) || \
48 	    (\intno == BOOK3S_INTERRUPT_EXTERNAL_HV) || \
49 	    (\intno == BOOK3S_INTERRUPT_ALIGNMENT) || \
50 	    (\intno == BOOK3S_INTERRUPT_PROGRAM) || \
51 	    (\intno == BOOK3S_INTERRUPT_FP_UNAVAIL) || \
52 	    (\intno == BOOK3S_INTERRUPT_DECREMENTER) || \
53 	    (\intno == BOOK3S_INTERRUPT_SYSCALL) || \
54 	    (\intno == BOOK3S_INTERRUPT_TRACE) || \
55 	    (\intno == BOOK3S_INTERRUPT_PERFMON) || \
56 	    (\intno == BOOK3S_INTERRUPT_ALTIVEC) || \
57 	    (\intno == BOOK3S_INTERRUPT_VSX)
58 
59 	b	kvmppc_trampoline_\intno
60 kvmppc_resume_\intno:
61 
62 	.endif
63 .endm
64 
65 #else
66 
67 .macro DO_KVM intno
68 .endm
69 
70 #endif /* CONFIG_KVM_BOOK3S_HANDLER */
71 
72 #else  /*__ASSEMBLY__ */
73 
74 struct kvmppc_vcore;
75 
76 /* Struct used for coordinating micro-threading (split-core) mode changes */
77 struct kvm_split_mode {
78 	unsigned long	rpr;
79 	unsigned long	pmmar;
80 	unsigned long	ldbar;
81 	u8		subcore_size;
82 	u8		do_nap;
83 	u8		napped[MAX_SMT_THREADS];
84 	struct kvmppc_vcore *master_vcs[MAX_SUBCORES];
85 };
86 
87 /*
88  * This struct goes in the PACA on 64-bit processors.  It is used
89  * to store host state that needs to be saved when we enter a guest
90  * and restored when we exit, but isn't specific to any particular
91  * guest or vcpu.  It also has some scratch fields used by the guest
92  * exit code.
93  */
94 struct kvmppc_host_state {
95 	ulong host_r1;
96 	ulong host_r2;
97 	ulong host_msr;
98 	ulong vmhandler;
99 	ulong scratch0;
100 	ulong scratch1;
101 	ulong scratch2;
102 	u8 in_guest;
103 	u8 restore_hid5;
104 	u8 napping;
105 
106 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
107 	u8 hwthread_req;
108 	u8 hwthread_state;
109 	u8 host_ipi;
110 	u8 ptid;
111 	struct kvm_vcpu *kvm_vcpu;
112 	struct kvmppc_vcore *kvm_vcore;
113 	unsigned long xics_phys;
114 	u32 saved_xirr;
115 	u64 dabr;
116 	u64 host_mmcr[7];	/* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER */
117 	u32 host_pmc[8];
118 	u64 host_purr;
119 	u64 host_spurr;
120 	u64 host_dscr;
121 	u64 dec_expires;
122 	struct kvm_split_mode *kvm_split_mode;
123 #endif
124 #ifdef CONFIG_PPC_BOOK3S_64
125 	u64 cfar;
126 	u64 ppr;
127 	u64 host_fscr;
128 #endif
129 };
130 
131 struct kvmppc_book3s_shadow_vcpu {
132 	bool in_use;
133 	ulong gpr[14];
134 	u32 cr;
135 	ulong xer;
136 	ulong ctr;
137 	ulong lr;
138 	ulong pc;
139 
140 	ulong shadow_srr1;
141 	ulong fault_dar;
142 	u32 fault_dsisr;
143 	u32 last_inst;
144 
145 #ifdef CONFIG_PPC_BOOK3S_32
146 	u32     sr[16];			/* Guest SRs */
147 
148 	struct kvmppc_host_state hstate;
149 #endif
150 
151 #ifdef CONFIG_PPC_BOOK3S_64
152 	u8 slb_max;			/* highest used guest slb entry */
153 	struct  {
154 		u64     esid;
155 		u64     vsid;
156 	} slb[64];			/* guest SLB */
157 	u64 shadow_fscr;
158 #endif
159 };
160 
161 #endif /*__ASSEMBLY__ */
162 
163 /* Values for kvm_state */
164 #define KVM_HWTHREAD_IN_KERNEL	0
165 #define KVM_HWTHREAD_IN_NAP	1
166 #define KVM_HWTHREAD_IN_KVM	2
167 
168 #endif /* __ASM_KVM_BOOK3S_ASM_H__ */
169