1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *
4  * Copyright SUSE Linux Products GmbH 2009
5  *
6  * Authors: Alexander Graf <agraf@suse.de>
7  */
8 
9 #ifndef __ASM_KVM_BOOK3S_ASM_H__
10 #define __ASM_KVM_BOOK3S_ASM_H__
11 
12 /* XICS ICP register offsets */
13 #define XICS_XIRR		4
14 #define XICS_MFRR		0xc
15 #define XICS_IPI		2	/* interrupt source # for IPIs */
16 
17 /* Maximum number of threads per physical core */
18 #define MAX_SMT_THREADS		8
19 
20 /* Maximum number of subcores per physical core */
21 #define MAX_SUBCORES		4
22 
23 #ifdef __ASSEMBLY__
24 
25 #ifdef CONFIG_KVM_BOOK3S_HANDLER
26 
27 #include <asm/kvm_asm.h>
28 
29 .macro DO_KVM intno
30 	.if (\intno == BOOK3S_INTERRUPT_SYSTEM_RESET) || \
31 	    (\intno == BOOK3S_INTERRUPT_MACHINE_CHECK) || \
32 	    (\intno == BOOK3S_INTERRUPT_DATA_STORAGE) || \
33 	    (\intno == BOOK3S_INTERRUPT_INST_STORAGE) || \
34 	    (\intno == BOOK3S_INTERRUPT_DATA_SEGMENT) || \
35 	    (\intno == BOOK3S_INTERRUPT_INST_SEGMENT) || \
36 	    (\intno == BOOK3S_INTERRUPT_EXTERNAL) || \
37 	    (\intno == BOOK3S_INTERRUPT_EXTERNAL_HV) || \
38 	    (\intno == BOOK3S_INTERRUPT_ALIGNMENT) || \
39 	    (\intno == BOOK3S_INTERRUPT_PROGRAM) || \
40 	    (\intno == BOOK3S_INTERRUPT_FP_UNAVAIL) || \
41 	    (\intno == BOOK3S_INTERRUPT_DECREMENTER) || \
42 	    (\intno == BOOK3S_INTERRUPT_SYSCALL) || \
43 	    (\intno == BOOK3S_INTERRUPT_TRACE) || \
44 	    (\intno == BOOK3S_INTERRUPT_PERFMON) || \
45 	    (\intno == BOOK3S_INTERRUPT_ALTIVEC) || \
46 	    (\intno == BOOK3S_INTERRUPT_VSX)
47 
48 	b	kvmppc_trampoline_\intno
49 kvmppc_resume_\intno:
50 
51 	.endif
52 .endm
53 
54 #else
55 
56 .macro DO_KVM intno
57 .endm
58 
59 #endif /* CONFIG_KVM_BOOK3S_HANDLER */
60 
61 #else  /*__ASSEMBLY__ */
62 
63 struct kvmppc_vcore;
64 
65 /* Struct used for coordinating micro-threading (split-core) mode changes */
66 struct kvm_split_mode {
67 	unsigned long	rpr;
68 	unsigned long	pmmar;
69 	unsigned long	ldbar;
70 	u8		subcore_size;
71 	u8		do_nap;
72 	u8		napped[MAX_SMT_THREADS];
73 	struct kvmppc_vcore *vc[MAX_SUBCORES];
74 };
75 
76 /*
77  * This struct goes in the PACA on 64-bit processors.  It is used
78  * to store host state that needs to be saved when we enter a guest
79  * and restored when we exit, but isn't specific to any particular
80  * guest or vcpu.  It also has some scratch fields used by the guest
81  * exit code.
82  */
83 struct kvmppc_host_state {
84 	ulong host_r1;
85 	ulong host_r2;
86 	ulong host_msr;
87 	ulong vmhandler;
88 	ulong scratch0;
89 	ulong scratch1;
90 	ulong scratch2;
91 	u8 in_guest;
92 	u8 restore_hid5;
93 	u8 napping;
94 
95 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
96 	u8 hwthread_req;
97 	u8 hwthread_state;
98 	u8 host_ipi;
99 	u8 ptid;		/* thread number within subcore when split */
100 	u8 fake_suspend;
101 	struct kvm_vcpu *kvm_vcpu;
102 	struct kvmppc_vcore *kvm_vcore;
103 	void __iomem *xics_phys;
104 	void __iomem *xive_tima_phys;
105 	void __iomem *xive_tima_virt;
106 	u32 saved_xirr;
107 	u64 dabr;
108 	u64 host_mmcr[7];	/* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER */
109 	u32 host_pmc[8];
110 	u64 host_purr;
111 	u64 host_spurr;
112 	u64 host_dscr;
113 	u64 dec_expires;
114 	struct kvm_split_mode *kvm_split_mode;
115 #endif
116 #ifdef CONFIG_PPC_BOOK3S_64
117 	u64 cfar;
118 	u64 ppr;
119 	u64 host_fscr;
120 #endif
121 };
122 
123 struct kvmppc_book3s_shadow_vcpu {
124 	bool in_use;
125 	ulong gpr[14];
126 	u32 cr;
127 	ulong xer;
128 	ulong ctr;
129 	ulong lr;
130 	ulong pc;
131 
132 	ulong shadow_srr1;
133 	ulong fault_dar;
134 	u32 fault_dsisr;
135 	u32 last_inst;
136 
137 #ifdef CONFIG_PPC_BOOK3S_32
138 	u32     sr[16];			/* Guest SRs */
139 
140 	struct kvmppc_host_state hstate;
141 #endif
142 
143 #ifdef CONFIG_PPC_BOOK3S_64
144 	u8 slb_max;			/* highest used guest slb entry */
145 	struct  {
146 		u64     esid;
147 		u64     vsid;
148 	} slb[64];			/* guest SLB */
149 	u64 shadow_fscr;
150 #endif
151 };
152 
153 #endif /*__ASSEMBLY__ */
154 
155 /* Values for kvm_state */
156 #define KVM_HWTHREAD_IN_KERNEL	0
157 #define KVM_HWTHREAD_IN_IDLE	1
158 #define KVM_HWTHREAD_IN_KVM	2
159 
160 #endif /* __ASM_KVM_BOOK3S_ASM_H__ */
161