2 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
4 * Author: Yu Liu <yu.liu@freescale.com>
5 * Ashish Kalra <ashish.kalra@freescale.com>
8 * This file is based on arch/powerpc/kvm/44x_tlb.h and
9 * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>,
10 * Copyright IBM Corp. 2007-2008
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License, version 2, as
14 * published by the Free Software Foundation.
20 #include <linux/kvm_host.h>
21 #include <asm/mmu-book3e.h>
24 #define E500_PID_NUM 3
25 #define E500_TLB_NUM 2
27 #define E500_TLB_VALID 1
28 #define E500_TLB_DIRTY 2
29 #define E500_TLB_BITMAP 4
33 unsigned int flags; /* E500_TLB_* */
37 struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */
40 #ifdef CONFIG_KVM_E500
44 struct kvmppc_e500_tlb_params {
45 int entries, ways, sets;
48 struct kvmppc_vcpu_e500 {
51 /* Unmodified copy of the guest's TLB -- shared with host userspace. */
52 struct kvm_book3e_206_tlb_entry *gtlb_arch;
54 /* Starting entry number in gtlb_arch[] */
55 int gtlb_offset[E500_TLB_NUM];
57 /* KVM internal information associated with each guest TLB entry */
58 struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
60 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
62 unsigned int gtlb_nv[E500_TLB_NUM];
65 * information associated with each host TLB entry --
66 * TLB1 only for now. If/when guest TLB1 entries can be
67 * mapped with host TLB0, this will be used for that too.
69 * We don't want to use this for guest TLB0 because then we'd
70 * have the overhead of doing the translation again even if
71 * the entry is still in the guest TLB (e.g. we swapped out
72 * and back, and our host TLB entries got evicted).
74 struct tlbe_ref *tlb_refs[E500_TLB_NUM];
75 unsigned int host_tlb1_nv;
84 struct page **shared_tlb_pages;
85 int num_shared_tlb_pages;
88 unsigned int *h2g_tlb1_rmap;
90 #ifdef CONFIG_KVM_E500
91 u32 pid[E500_PID_NUM];
94 struct vcpu_id_table *idt;
98 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
100 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
103 /* This geometry is the legacy default -- can be overridden by userspace */
104 #define KVM_E500_TLB0_WAY_SIZE 128
105 #define KVM_E500_TLB0_WAY_NUM 2
107 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
108 #define KVM_E500_TLB1_SIZE 16
110 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
111 #define tlbsel_of(index) ((index) >> 16)
112 #define esel_of(index) ((index) & 0xFFFF)
114 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
115 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
116 #define MAS2_ATTRIB_MASK \
118 #define MAS3_ATTRIB_MASK \
119 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
120 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
122 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
124 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
125 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
126 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb);
127 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb);
128 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
129 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
131 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
132 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
135 #ifdef CONFIG_KVM_E500
136 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
137 unsigned int as, unsigned int gid,
138 unsigned int pr, int avoid_recursion);
141 /* TLB helper functions */
142 static inline unsigned int
143 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
145 return (tlbe->mas1 >> 7) & 0x1f;
148 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
150 return tlbe->mas2 & 0xfffff000;
153 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
155 unsigned int pgsize = get_tlb_size(tlbe);
156 return 1ULL << 10 << pgsize;
159 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
161 u64 bytes = get_tlb_bytes(tlbe);
162 return get_tlb_eaddr(tlbe) + bytes - 1;
165 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
167 return tlbe->mas7_3 & ~0xfffULL;
170 static inline unsigned int
171 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
173 return (tlbe->mas1 >> 16) & 0xff;
176 static inline unsigned int
177 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
179 return (tlbe->mas1 >> 12) & 0x1;
182 static inline unsigned int
183 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
185 return (tlbe->mas1 >> 31) & 0x1;
188 static inline unsigned int
189 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
191 return (tlbe->mas1 >> 30) & 0x1;
194 static inline unsigned int
195 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
197 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
200 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
202 return vcpu->arch.pid & 0xff;
205 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
207 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
210 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
212 return !!(vcpu->arch.shared->msr & MSR_PR);
215 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
217 return (vcpu->arch.shared->mas6 >> 16) & 0xff;
220 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
222 return vcpu->arch.shared->mas6 & 0x1;
225 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
228 * Manual says that tlbsel has 2 bits wide.
229 * Since we only have two TLBs, only lower bit is used.
231 return (vcpu->arch.shared->mas0 >> 28) & 0x1;
234 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
236 return vcpu->arch.shared->mas0 & 0xfff;
239 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
241 return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
244 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
245 const struct kvm_book3e_206_tlb_entry *tlbe)
249 if (!get_tlb_v(tlbe))
252 /* Does it match current guest AS? */
253 /* XXX what about IS != DS? */
254 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
257 gpa = get_tlb_raddr(tlbe);
258 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
259 /* Mapping is not for RAM. */
265 static inline struct kvm_book3e_206_tlb_entry *get_entry(
266 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
268 int offset = vcpu_e500->gtlb_offset[tlbsel];
269 return &vcpu_e500->gtlb_arch[offset + entry];
272 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
273 struct kvm_book3e_206_tlb_entry *gtlbe);
274 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
276 #ifdef CONFIG_KVM_E500
277 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
278 struct kvm_book3e_206_tlb_entry *gtlbe);
280 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
282 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
283 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
285 return vcpu_e500->pid[tidseld];
288 /* Force TS=1 for all guest mappings. */
289 #define get_tlb_sts(gtlbe) (MAS1_TS)
290 #endif /* CONFIG_KVM_E500 */
292 #endif /* KVM_E500_H */