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 /* LPIDs we support with this build -- runtime limit may be lower */
18 #define KVMPPC_NR_LPIDS			(LPID_RSVD + 1)
19 
20 /* Maximum number of threads per physical core */
21 #define MAX_SMT_THREADS		8
22 
23 /* Maximum number of subcores per physical core */
24 #define MAX_SUBCORES		4
25 
26 #ifdef __ASSEMBLY__
27 
28 #ifdef CONFIG_KVM_BOOK3S_HANDLER
29 
30 #include <asm/kvm_asm.h>
31 
32 .macro DO_KVM intno
33 	.if (\intno == BOOK3S_INTERRUPT_SYSTEM_RESET) || \
34 	    (\intno == BOOK3S_INTERRUPT_MACHINE_CHECK) || \
35 	    (\intno == BOOK3S_INTERRUPT_DATA_STORAGE) || \
36 	    (\intno == BOOK3S_INTERRUPT_INST_STORAGE) || \
37 	    (\intno == BOOK3S_INTERRUPT_DATA_SEGMENT) || \
38 	    (\intno == BOOK3S_INTERRUPT_INST_SEGMENT) || \
39 	    (\intno == BOOK3S_INTERRUPT_EXTERNAL) || \
40 	    (\intno == BOOK3S_INTERRUPT_EXTERNAL_HV) || \
41 	    (\intno == BOOK3S_INTERRUPT_ALIGNMENT) || \
42 	    (\intno == BOOK3S_INTERRUPT_PROGRAM) || \
43 	    (\intno == BOOK3S_INTERRUPT_FP_UNAVAIL) || \
44 	    (\intno == BOOK3S_INTERRUPT_DECREMENTER) || \
45 	    (\intno == BOOK3S_INTERRUPT_SYSCALL) || \
46 	    (\intno == BOOK3S_INTERRUPT_TRACE) || \
47 	    (\intno == BOOK3S_INTERRUPT_PERFMON) || \
48 	    (\intno == BOOK3S_INTERRUPT_ALTIVEC) || \
49 	    (\intno == BOOK3S_INTERRUPT_VSX)
50 
51 	b	kvmppc_trampoline_\intno
52 kvmppc_resume_\intno:
53 
54 	.endif
55 .endm
56 
57 #else
58 
59 .macro DO_KVM intno
60 .endm
61 
62 #endif /* CONFIG_KVM_BOOK3S_HANDLER */
63 
64 #else  /*__ASSEMBLY__ */
65 
66 struct kvmppc_vcore;
67 
68 /* Struct used for coordinating micro-threading (split-core) mode changes */
69 struct kvm_split_mode {
70 	unsigned long	rpr;
71 	unsigned long	pmmar;
72 	unsigned long	ldbar;
73 	u8		subcore_size;
74 	u8		do_nap;
75 	u8		napped[MAX_SMT_THREADS];
76 	struct kvmppc_vcore *vc[MAX_SUBCORES];
77 };
78 
79 /*
80  * This struct goes in the PACA on 64-bit processors.  It is used
81  * to store host state that needs to be saved when we enter a guest
82  * and restored when we exit, but isn't specific to any particular
83  * guest or vcpu.  It also has some scratch fields used by the guest
84  * exit code.
85  */
86 struct kvmppc_host_state {
87 	ulong host_r1;
88 	ulong host_r2;
89 	ulong host_msr;
90 	ulong vmhandler;
91 	ulong scratch0;
92 	ulong scratch1;
93 	ulong scratch2;
94 	u8 in_guest;
95 	u8 restore_hid5;
96 	u8 napping;
97 
98 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
99 	u8 hwthread_req;
100 	u8 hwthread_state;
101 	u8 host_ipi;
102 	u8 ptid;		/* thread number within subcore when split */
103 	u8 fake_suspend;
104 	struct kvm_vcpu *kvm_vcpu;
105 	struct kvmppc_vcore *kvm_vcore;
106 	void __iomem *xics_phys;
107 	void __iomem *xive_tima_phys;
108 	void __iomem *xive_tima_virt;
109 	u32 saved_xirr;
110 	u64 dabr;
111 	u64 host_mmcr[10];	/* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER, MMCR3, SIER2/3 */
112 	u32 host_pmc[8];
113 	u64 host_purr;
114 	u64 host_spurr;
115 	u64 host_dscr;
116 	u64 dec_expires;
117 	struct kvm_split_mode *kvm_split_mode;
118 #endif
119 #ifdef CONFIG_PPC_BOOK3S_64
120 	u64 cfar;
121 	u64 ppr;
122 	u64 host_fscr;
123 #endif
124 };
125 
126 struct kvmppc_book3s_shadow_vcpu {
127 	bool in_use;
128 	ulong gpr[14];
129 	u32 cr;
130 	ulong xer;
131 	ulong ctr;
132 	ulong lr;
133 	ulong pc;
134 
135 	ulong shadow_srr1;
136 	ulong fault_dar;
137 	u32 fault_dsisr;
138 	u32 last_inst;
139 
140 #ifdef CONFIG_PPC_BOOK3S_32
141 	u32     sr[16];			/* Guest SRs */
142 
143 	struct kvmppc_host_state hstate;
144 #endif
145 
146 #ifdef CONFIG_PPC_BOOK3S_64
147 	u8 slb_max;			/* highest used guest slb entry */
148 	struct  {
149 		u64     esid;
150 		u64     vsid;
151 	} slb[64];			/* guest SLB */
152 	u64 shadow_fscr;
153 #endif
154 };
155 
156 #endif /*__ASSEMBLY__ */
157 
158 /* Values for kvm_state */
159 #define KVM_HWTHREAD_IN_KERNEL	0
160 #define KVM_HWTHREAD_IN_IDLE	1
161 #define KVM_HWTHREAD_IN_KVM	2
162 
163 #endif /* __ASM_KVM_BOOK3S_ASM_H__ */
164