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>
25 #include <asm/cputhreads.h>
31 #define E500_PID_NUM 3
32 #define E500_TLB_NUM 2
34 /* entry is mapped somewhere in host TLB */
35 #define E500_TLB_VALID (1 << 31)
36 /* TLB1 entry is mapped by host TLB1, tracked by bitmaps */
37 #define E500_TLB_BITMAP (1 << 30)
38 /* TLB1 entry is mapped by host TLB0 */
39 #define E500_TLB_TLB0 (1 << 29)
40 /* bits [6-5] MAS2_X1 and MAS2_X0 and [4-0] bits for WIMGE */
41 #define E500_TLB_MAS2_ATTR (0x7f)
44 kvm_pfn_t pfn; /* valid only for TLB0, except briefly */
45 unsigned int flags; /* E500_TLB_* */
52 #ifdef CONFIG_KVM_E500V2
56 struct kvmppc_e500_tlb_params {
57 int entries, ways, sets;
60 struct kvmppc_vcpu_e500 {
63 /* Unmodified copy of the guest's TLB -- shared with host userspace. */
64 struct kvm_book3e_206_tlb_entry *gtlb_arch;
66 /* Starting entry number in gtlb_arch[] */
67 int gtlb_offset[E500_TLB_NUM];
69 /* KVM internal information associated with each guest TLB entry */
70 struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
72 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
74 unsigned int gtlb_nv[E500_TLB_NUM];
76 unsigned int host_tlb1_nv;
85 struct page **shared_tlb_pages;
86 int num_shared_tlb_pages;
89 unsigned int *h2g_tlb1_rmap;
91 /* Minimum and maximum address mapped my TLB1 */
92 unsigned long tlb1_min_eaddr;
93 unsigned long tlb1_max_eaddr;
95 #ifdef CONFIG_KVM_E500V2
96 u32 pid[E500_PID_NUM];
99 struct vcpu_id_table *idt;
103 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
105 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
109 /* This geometry is the legacy default -- can be overridden by userspace */
110 #define KVM_E500_TLB0_WAY_SIZE 128
111 #define KVM_E500_TLB0_WAY_NUM 2
113 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
114 #define KVM_E500_TLB1_SIZE 16
116 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
117 #define tlbsel_of(index) ((index) >> 16)
118 #define esel_of(index) ((index) & 0xFFFF)
120 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
121 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
122 #define MAS2_ATTRIB_MASK \
123 (MAS2_X0 | MAS2_X1 | MAS2_E | MAS2_G)
124 #define MAS3_ATTRIB_MASK \
125 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
126 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
128 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
130 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
131 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
132 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea);
133 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea);
134 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea);
135 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
136 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
138 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
139 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
141 int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
142 union kvmppc_one_reg *val);
143 int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
144 union kvmppc_one_reg *val);
146 #ifdef CONFIG_KVM_E500V2
147 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
148 unsigned int as, unsigned int gid,
149 unsigned int pr, int avoid_recursion);
152 /* TLB helper functions */
153 static inline unsigned int
154 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
156 return (tlbe->mas1 >> 7) & 0x1f;
159 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
161 return tlbe->mas2 & MAS2_EPN;
164 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
166 unsigned int pgsize = get_tlb_size(tlbe);
167 return 1ULL << 10 << pgsize;
170 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
172 u64 bytes = get_tlb_bytes(tlbe);
173 return get_tlb_eaddr(tlbe) + bytes - 1;
176 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
178 return tlbe->mas7_3 & ~0xfffULL;
181 static inline unsigned int
182 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
184 return (tlbe->mas1 >> 16) & 0xff;
187 static inline unsigned int
188 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
190 return (tlbe->mas1 >> 12) & 0x1;
193 static inline unsigned int
194 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
196 return (tlbe->mas1 >> 31) & 0x1;
199 static inline unsigned int
200 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
202 return (tlbe->mas1 >> 30) & 0x1;
205 static inline unsigned int
206 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
208 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
211 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
213 return vcpu->arch.pid & 0xff;
216 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
218 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
221 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
223 return !!(vcpu->arch.shared->msr & MSR_PR);
226 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
228 return (vcpu->arch.shared->mas6 >> 16) & 0xff;
231 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
233 return vcpu->arch.shared->mas6 & 0x1;
236 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
239 * Manual says that tlbsel has 2 bits wide.
240 * Since we only have two TLBs, only lower bit is used.
242 return (vcpu->arch.shared->mas0 >> 28) & 0x1;
245 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
247 return vcpu->arch.shared->mas0 & 0xfff;
250 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
252 return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
255 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
256 const struct kvm_book3e_206_tlb_entry *tlbe)
260 if (!get_tlb_v(tlbe))
263 #ifndef CONFIG_KVM_BOOKE_HV
264 /* Does it match current guest AS? */
265 /* XXX what about IS != DS? */
266 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
270 gpa = get_tlb_raddr(tlbe);
271 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
272 /* Mapping is not for RAM. */
278 static inline struct kvm_book3e_206_tlb_entry *get_entry(
279 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
281 int offset = vcpu_e500->gtlb_offset[tlbsel];
282 return &vcpu_e500->gtlb_arch[offset + entry];
285 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
286 struct kvm_book3e_206_tlb_entry *gtlbe);
287 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
289 #ifdef CONFIG_KVM_BOOKE_HV
290 #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe)
291 #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu)
292 #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS)
295 * These functions should be called with preemption disabled
296 * and the returned value is valid only in that context
298 static inline int get_thread_specific_lpid(int vm_lpid)
300 int vcpu_lpid = vm_lpid;
302 if (threads_per_core == 2)
303 vcpu_lpid |= smp_processor_id() & 1;
308 static inline int get_lpid(struct kvm_vcpu *vcpu)
310 return get_thread_specific_lpid(vcpu->kvm->arch.lpid);
313 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
314 struct kvm_book3e_206_tlb_entry *gtlbe);
316 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
318 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
319 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
321 return vcpu_e500->pid[tidseld];
324 /* Force TS=1 for all guest mappings. */
325 #define get_tlb_sts(gtlbe) (MAS1_TS)
326 #endif /* !BOOKE_HV */
328 static inline bool has_feature(const struct kvm_vcpu *vcpu,
333 case VCPU_FTR_MMU_V2:
334 has_ftr = ((vcpu->arch.mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V2);
342 #endif /* KVM_E500_H */