2 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
4 * Author: Yu Liu <yu.liu@freescale.com>
7 * This file is based on arch/powerpc/kvm/44x_tlb.h and
8 * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>,
9 * Copyright IBM Corp. 2007-2008
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License, version 2, as
13 * published by the Free Software Foundation.
19 #include <linux/kvm_host.h>
20 #include <asm/mmu-book3e.h>
23 #define E500_PID_NUM 3
24 #define E500_TLB_NUM 2
26 #define E500_TLB_VALID 1
27 #define E500_TLB_DIRTY 2
31 unsigned int flags; /* E500_TLB_* */
35 struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */
40 struct kvmppc_e500_tlb_params {
41 int entries, ways, sets;
44 struct kvmppc_vcpu_e500 {
45 /* Unmodified copy of the guest's TLB -- shared with host userspace. */
46 struct kvm_book3e_206_tlb_entry *gtlb_arch;
48 /* Starting entry number in gtlb_arch[] */
49 int gtlb_offset[E500_TLB_NUM];
51 /* KVM internal information associated with each guest TLB entry */
52 struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
54 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
56 unsigned int gtlb_nv[E500_TLB_NUM];
59 * information associated with each host TLB entry --
60 * TLB1 only for now. If/when guest TLB1 entries can be
61 * mapped with host TLB0, this will be used for that too.
63 * We don't want to use this for guest TLB0 because then we'd
64 * have the overhead of doing the translation again even if
65 * the entry is still in the guest TLB (e.g. we swapped out
66 * and back, and our host TLB entries got evicted).
68 struct tlbe_ref *tlb_refs[E500_TLB_NUM];
69 unsigned int host_tlb1_nv;
71 u32 host_pid[E500_PID_NUM];
72 u32 pid[E500_PID_NUM];
76 struct vcpu_id_table *idt;
86 struct page **shared_tlb_pages;
87 int num_shared_tlb_pages;
92 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
94 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
97 /* This geometry is the legacy default -- can be overridden by userspace */
98 #define KVM_E500_TLB0_WAY_SIZE 128
99 #define KVM_E500_TLB0_WAY_NUM 2
101 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
102 #define KVM_E500_TLB1_SIZE 16
104 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
105 #define tlbsel_of(index) ((index) >> 16)
106 #define esel_of(index) ((index) & 0xFFFF)
108 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
109 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
110 #define MAS2_ATTRIB_MASK \
112 #define MAS3_ATTRIB_MASK \
113 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
114 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
116 extern void kvmppc_dump_tlbs(struct kvm_vcpu *);
117 extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong);
118 extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *);
119 extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *);
120 extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int);
121 extern int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *, int);
122 extern int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int);
123 extern void kvmppc_e500_tlb_put(struct kvm_vcpu *);
124 extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int);
125 extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *);
126 extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *);
127 extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *);
128 extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *);
130 /* TLB helper functions */
131 static inline unsigned int
132 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
134 return (tlbe->mas1 >> 7) & 0x1f;
137 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
139 return tlbe->mas2 & 0xfffff000;
142 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
144 unsigned int pgsize = get_tlb_size(tlbe);
145 return 1ULL << 10 << pgsize;
148 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
150 u64 bytes = get_tlb_bytes(tlbe);
151 return get_tlb_eaddr(tlbe) + bytes - 1;
154 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
156 return tlbe->mas7_3 & ~0xfffULL;
159 static inline unsigned int
160 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
162 return (tlbe->mas1 >> 16) & 0xff;
165 static inline unsigned int
166 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
168 return (tlbe->mas1 >> 12) & 0x1;
171 static inline unsigned int
172 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
174 return (tlbe->mas1 >> 31) & 0x1;
177 static inline unsigned int
178 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
180 return (tlbe->mas1 >> 30) & 0x1;
183 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
185 return vcpu->arch.pid & 0xff;
188 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
190 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
193 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
195 return !!(vcpu->arch.shared->msr & MSR_PR);
198 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
200 return (vcpu->arch.shared->mas6 >> 16) & 0xff;
203 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
205 return vcpu->arch.shared->mas6 & 0x1;
208 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
211 * Manual says that tlbsel has 2 bits wide.
212 * Since we only have two TLBs, only lower bit is used.
214 return (vcpu->arch.shared->mas0 >> 28) & 0x1;
217 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
219 return vcpu->arch.shared->mas0 & 0xfff;
222 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
224 return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
227 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
228 const struct kvm_book3e_206_tlb_entry *tlbe)
232 if (!get_tlb_v(tlbe))
235 /* Does it match current guest AS? */
236 /* XXX what about IS != DS? */
237 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
240 gpa = get_tlb_raddr(tlbe);
241 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
242 /* Mapping is not for RAM. */
248 #endif /* KVM_E500_H */