2 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
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>
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
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.
22 #include <linux/kvm_host.h>
23 #include <asm/mmu-book3e.h>
26 #define E500_PID_NUM 3
27 #define E500_TLB_NUM 2
29 #define E500_TLB_VALID 1
30 #define E500_TLB_DIRTY 2
31 #define E500_TLB_BITMAP 4
35 unsigned int flags; /* E500_TLB_* */
39 struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */
42 #ifdef CONFIG_KVM_E500
46 struct kvmppc_e500_tlb_params {
47 int entries, ways, sets;
50 struct kvmppc_vcpu_e500 {
53 /* Unmodified copy of the guest's TLB -- shared with host userspace. */
54 struct kvm_book3e_206_tlb_entry *gtlb_arch;
56 /* Starting entry number in gtlb_arch[] */
57 int gtlb_offset[E500_TLB_NUM];
59 /* KVM internal information associated with each guest TLB entry */
60 struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
62 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
64 unsigned int gtlb_nv[E500_TLB_NUM];
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.
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).
76 struct tlbe_ref *tlb_refs[E500_TLB_NUM];
77 unsigned int host_tlb1_nv;
86 struct page **shared_tlb_pages;
87 int num_shared_tlb_pages;
90 unsigned int *h2g_tlb1_rmap;
92 #ifdef CONFIG_KVM_E500
93 u32 pid[E500_PID_NUM];
96 struct vcpu_id_table *idt;
100 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
102 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
106 /* This geometry is the legacy default -- can be overridden by userspace */
107 #define KVM_E500_TLB0_WAY_SIZE 128
108 #define KVM_E500_TLB0_WAY_NUM 2
110 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
111 #define KVM_E500_TLB1_SIZE 16
113 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
114 #define tlbsel_of(index) ((index) >> 16)
115 #define esel_of(index) ((index) & 0xFFFF)
117 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
118 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
119 #define MAS2_ATTRIB_MASK \
121 #define MAS3_ATTRIB_MASK \
122 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
123 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
125 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
127 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
128 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
129 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb);
130 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int rt, int ra, int rb);
131 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb);
132 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
133 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
135 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
136 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
139 #ifdef CONFIG_KVM_E500
140 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
141 unsigned int as, unsigned int gid,
142 unsigned int pr, int avoid_recursion);
145 /* TLB helper functions */
146 static inline unsigned int
147 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
149 return (tlbe->mas1 >> 7) & 0x1f;
152 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
154 return tlbe->mas2 & 0xfffff000;
157 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
159 unsigned int pgsize = get_tlb_size(tlbe);
160 return 1ULL << 10 << pgsize;
163 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
165 u64 bytes = get_tlb_bytes(tlbe);
166 return get_tlb_eaddr(tlbe) + bytes - 1;
169 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
171 return tlbe->mas7_3 & ~0xfffULL;
174 static inline unsigned int
175 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
177 return (tlbe->mas1 >> 16) & 0xff;
180 static inline unsigned int
181 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
183 return (tlbe->mas1 >> 12) & 0x1;
186 static inline unsigned int
187 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
189 return (tlbe->mas1 >> 31) & 0x1;
192 static inline unsigned int
193 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
195 return (tlbe->mas1 >> 30) & 0x1;
198 static inline unsigned int
199 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
201 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
204 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
206 return vcpu->arch.pid & 0xff;
209 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
211 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
214 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
216 return !!(vcpu->arch.shared->msr & MSR_PR);
219 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
221 return (vcpu->arch.shared->mas6 >> 16) & 0xff;
224 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
226 return vcpu->arch.shared->mas6 & 0x1;
229 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
232 * Manual says that tlbsel has 2 bits wide.
233 * Since we only have two TLBs, only lower bit is used.
235 return (vcpu->arch.shared->mas0 >> 28) & 0x1;
238 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
240 return vcpu->arch.shared->mas0 & 0xfff;
243 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
245 return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
248 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
249 const struct kvm_book3e_206_tlb_entry *tlbe)
253 if (!get_tlb_v(tlbe))
256 #ifndef CONFIG_KVM_BOOKE_HV
257 /* Does it match current guest AS? */
258 /* XXX what about IS != DS? */
259 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
263 gpa = get_tlb_raddr(tlbe);
264 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
265 /* Mapping is not for RAM. */
271 static inline struct kvm_book3e_206_tlb_entry *get_entry(
272 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
274 int offset = vcpu_e500->gtlb_offset[tlbsel];
275 return &vcpu_e500->gtlb_arch[offset + entry];
278 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
279 struct kvm_book3e_206_tlb_entry *gtlbe);
280 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
282 #ifdef CONFIG_KVM_BOOKE_HV
283 #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe)
284 #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu)
285 #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS)
287 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
288 struct kvm_book3e_206_tlb_entry *gtlbe);
290 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
292 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
293 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
295 return vcpu_e500->pid[tidseld];
298 /* Force TS=1 for all guest mappings. */
299 #define get_tlb_sts(gtlbe) (MAS1_TS)
300 #endif /* !BOOKE_HV */
302 #endif /* KVM_E500_H */