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1/*
2 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
3 *
4 * Author: Yu Liu <yu.liu@freescale.com>
5 * Scott Wood <scottwood@freescale.com>
6 * Ashish Kalra <ashish.kalra@freescale.com>
7 * Varun Sethi <varun.sethi@freescale.com>
8 *
9 * Description:
10 * This file is based on arch/powerpc/kvm/44x_tlb.h and
11 * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>,
12 * Copyright IBM Corp. 2007-2008
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License, version 2, as
16 * published by the Free Software Foundation.
17 */
18
19#ifndef KVM_E500_H
20#define KVM_E500_H
21
22#include <linux/kvm_host.h>
23#include <asm/mmu-book3e.h>
24#include <asm/tlb.h>
25
26#define E500_PID_NUM 3
27#define E500_TLB_NUM 2
28
29#define E500_TLB_VALID 1
30#define E500_TLB_DIRTY 2
31#define E500_TLB_BITMAP 4
32
33struct tlbe_ref {
34 pfn_t pfn;
35 unsigned int flags; /* E500_TLB_* */
36};
37
38struct tlbe_priv {
39 struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */
40};
41
42#ifdef CONFIG_KVM_E500V2
43struct vcpu_id_table;
44#endif
45
46struct kvmppc_e500_tlb_params {
47 int entries, ways, sets;
48};
49
50struct kvmppc_vcpu_e500 {
51 struct kvm_vcpu vcpu;
52
53 /* Unmodified copy of the guest's TLB -- shared with host userspace. */
54 struct kvm_book3e_206_tlb_entry *gtlb_arch;
55
56 /* Starting entry number in gtlb_arch[] */
57 int gtlb_offset[E500_TLB_NUM];
58
59 /* KVM internal information associated with each guest TLB entry */
60 struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
61
62 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
63
64 unsigned int gtlb_nv[E500_TLB_NUM];
65
66 /*
67 * information associated with each host TLB entry --
68 * TLB1 only for now. If/when guest TLB1 entries can be
69 * mapped with host TLB0, this will be used for that too.
70 *
71 * We don't want to use this for guest TLB0 because then we'd
72 * have the overhead of doing the translation again even if
73 * the entry is still in the guest TLB (e.g. we swapped out
74 * and back, and our host TLB entries got evicted).
75 */
76 struct tlbe_ref *tlb_refs[E500_TLB_NUM];
77 unsigned int host_tlb1_nv;
78
79 u32 svr;
80 u32 l1csr0;
81 u32 l1csr1;
82 u32 hid0;
83 u32 hid1;
84 u64 mcar;
85
86 struct page **shared_tlb_pages;
87 int num_shared_tlb_pages;
88
89 u64 *g2h_tlb1_map;
90 unsigned int *h2g_tlb1_rmap;
91
92 /* Minimum and maximum address mapped my TLB1 */
93 unsigned long tlb1_min_eaddr;
94 unsigned long tlb1_max_eaddr;
95
96#ifdef CONFIG_KVM_E500V2
97 u32 pid[E500_PID_NUM];
98
99 /* vcpu id table */
100 struct vcpu_id_table *idt;
101#endif
102};
103
104static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
105{
106 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
107}
108
109
110/* This geometry is the legacy default -- can be overridden by userspace */
111#define KVM_E500_TLB0_WAY_SIZE 128
112#define KVM_E500_TLB0_WAY_NUM 2
113
114#define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
115#define KVM_E500_TLB1_SIZE 16
116
117#define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
118#define tlbsel_of(index) ((index) >> 16)
119#define esel_of(index) ((index) & 0xFFFF)
120
121#define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
122#define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
123#define MAS2_ATTRIB_MASK \
124 (MAS2_X0 | MAS2_X1)
125#define MAS3_ATTRIB_MASK \
126 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
127 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
128
129int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
130 ulong value);
131int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
132int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
133int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb);
134int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int rt, int ra, int rb);
135int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb);
136int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
137void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
138
139void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
140int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
141
142
143#ifdef CONFIG_KVM_E500V2
144unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
145 unsigned int as, unsigned int gid,
146 unsigned int pr, int avoid_recursion);
147#endif
148
149/* TLB helper functions */
150static inline unsigned int
151get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
152{
153 return (tlbe->mas1 >> 7) & 0x1f;
154}
155
156static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
157{
158 return tlbe->mas2 & 0xfffff000;
159}
160
161static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
162{
163 unsigned int pgsize = get_tlb_size(tlbe);
164 return 1ULL << 10 << pgsize;
165}
166
167static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
168{
169 u64 bytes = get_tlb_bytes(tlbe);
170 return get_tlb_eaddr(tlbe) + bytes - 1;
171}
172
173static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
174{
175 return tlbe->mas7_3 & ~0xfffULL;
176}
177
178static inline unsigned int
179get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
180{
181 return (tlbe->mas1 >> 16) & 0xff;
182}
183
184static inline unsigned int
185get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
186{
187 return (tlbe->mas1 >> 12) & 0x1;
188}
189
190static inline unsigned int
191get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
192{
193 return (tlbe->mas1 >> 31) & 0x1;
194}
195
196static inline unsigned int
197get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
198{
199 return (tlbe->mas1 >> 30) & 0x1;
200}
201
202static inline unsigned int
203get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
204{
205 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
206}
207
208static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
209{
210 return vcpu->arch.pid & 0xff;
211}
212
213static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
214{
215 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
216}
217
218static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
219{
220 return !!(vcpu->arch.shared->msr & MSR_PR);
221}
222
223static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
224{
225 return (vcpu->arch.shared->mas6 >> 16) & 0xff;
226}
227
228static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
229{
230 return vcpu->arch.shared->mas6 & 0x1;
231}
232
233static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
234{
235 /*
236 * Manual says that tlbsel has 2 bits wide.
237 * Since we only have two TLBs, only lower bit is used.
238 */
239 return (vcpu->arch.shared->mas0 >> 28) & 0x1;
240}
241
242static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
243{
244 return vcpu->arch.shared->mas0 & 0xfff;
245}
246
247static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
248{
249 return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
250}
251
252static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
253 const struct kvm_book3e_206_tlb_entry *tlbe)
254{
255 gpa_t gpa;
256
257 if (!get_tlb_v(tlbe))
258 return 0;
259
260#ifndef CONFIG_KVM_BOOKE_HV
261 /* Does it match current guest AS? */
262 /* XXX what about IS != DS? */
263 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
264 return 0;
265#endif
266
267 gpa = get_tlb_raddr(tlbe);
268 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
269 /* Mapping is not for RAM. */
270 return 0;
271
272 return 1;
273}
274
275static inline struct kvm_book3e_206_tlb_entry *get_entry(
276 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
277{
278 int offset = vcpu_e500->gtlb_offset[tlbsel];
279 return &vcpu_e500->gtlb_arch[offset + entry];
280}
281
282void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
283 struct kvm_book3e_206_tlb_entry *gtlbe);
284void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
285
286#ifdef CONFIG_KVM_BOOKE_HV
287#define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe)
288#define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu)
289#define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS)
290#else
291unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
292 struct kvm_book3e_206_tlb_entry *gtlbe);
293
294static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
295{
296 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
297 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
298
299 return vcpu_e500->pid[tidseld];
300}
301
302/* Force TS=1 for all guest mappings. */
303#define get_tlb_sts(gtlbe) (MAS1_TS)
304#endif /* !BOOKE_HV */
305
306#endif /* KVM_E500_H */