/* * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved. * * Author: Yu Liu * Scott Wood * Ashish Kalra * Varun Sethi * * Description: * This file is based on arch/powerpc/kvm/44x_tlb.h and * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard , * Copyright IBM Corp. 2007-2008 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, as * published by the Free Software Foundation. */ #ifndef KVM_E500_H #define KVM_E500_H #include #include #include #define E500_PID_NUM 3 #define E500_TLB_NUM 2 #define E500_TLB_VALID 1 #define E500_TLB_DIRTY 2 #define E500_TLB_BITMAP 4 struct tlbe_ref { pfn_t pfn; unsigned int flags; /* E500_TLB_* */ }; struct tlbe_priv { struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */ }; #ifdef CONFIG_KVM_E500 struct vcpu_id_table; #endif struct kvmppc_e500_tlb_params { int entries, ways, sets; }; struct kvmppc_vcpu_e500 { struct kvm_vcpu vcpu; /* Unmodified copy of the guest's TLB -- shared with host userspace. */ struct kvm_book3e_206_tlb_entry *gtlb_arch; /* Starting entry number in gtlb_arch[] */ int gtlb_offset[E500_TLB_NUM]; /* KVM internal information associated with each guest TLB entry */ struct tlbe_priv *gtlb_priv[E500_TLB_NUM]; struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM]; unsigned int gtlb_nv[E500_TLB_NUM]; /* * information associated with each host TLB entry -- * TLB1 only for now. If/when guest TLB1 entries can be * mapped with host TLB0, this will be used for that too. * * We don't want to use this for guest TLB0 because then we'd * have the overhead of doing the translation again even if * the entry is still in the guest TLB (e.g. we swapped out * and back, and our host TLB entries got evicted). */ struct tlbe_ref *tlb_refs[E500_TLB_NUM]; unsigned int host_tlb1_nv; u32 svr; u32 l1csr0; u32 l1csr1; u32 hid0; u32 hid1; u64 mcar; struct page **shared_tlb_pages; int num_shared_tlb_pages; u64 *g2h_tlb1_map; unsigned int *h2g_tlb1_rmap; #ifdef CONFIG_KVM_E500 u32 pid[E500_PID_NUM]; /* vcpu id table */ struct vcpu_id_table *idt; #endif }; static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu) { return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu); } /* This geometry is the legacy default -- can be overridden by userspace */ #define KVM_E500_TLB0_WAY_SIZE 128 #define KVM_E500_TLB0_WAY_NUM 2 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) #define KVM_E500_TLB1_SIZE 16 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) #define tlbsel_of(index) ((index) >> 16) #define esel_of(index) ((index) & 0xFFFF) #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) #define MAS2_ATTRIB_MASK \ (MAS2_X0 | MAS2_X1) #define MAS3_ATTRIB_MASK \ (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value); int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu); int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu); int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb); int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int rt, int ra, int rb); int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb); int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500); void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500); void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); #ifdef CONFIG_KVM_E500 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500, unsigned int as, unsigned int gid, unsigned int pr, int avoid_recursion); #endif /* TLB helper functions */ static inline unsigned int get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe) { return (tlbe->mas1 >> 7) & 0x1f; } static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe) { return tlbe->mas2 & 0xfffff000; } static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe) { unsigned int pgsize = get_tlb_size(tlbe); return 1ULL << 10 << pgsize; } static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe) { u64 bytes = get_tlb_bytes(tlbe); return get_tlb_eaddr(tlbe) + bytes - 1; } static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe) { return tlbe->mas7_3 & ~0xfffULL; } static inline unsigned int get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe) { return (tlbe->mas1 >> 16) & 0xff; } static inline unsigned int get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe) { return (tlbe->mas1 >> 12) & 0x1; } static inline unsigned int get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe) { return (tlbe->mas1 >> 31) & 0x1; } static inline unsigned int get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe) { return (tlbe->mas1 >> 30) & 0x1; } static inline unsigned int get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe) { return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; } static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) { return vcpu->arch.pid & 0xff; } static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) { return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); } static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) { return !!(vcpu->arch.shared->msr & MSR_PR); } static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu) { return (vcpu->arch.shared->mas6 >> 16) & 0xff; } static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu) { return vcpu->arch.shared->mas6 & 0x1; } static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu) { /* * Manual says that tlbsel has 2 bits wide. * Since we only have two TLBs, only lower bit is used. */ return (vcpu->arch.shared->mas0 >> 28) & 0x1; } static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu) { return vcpu->arch.shared->mas0 & 0xfff; } static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu) { return (vcpu->arch.shared->mas0 >> 16) & 0xfff; } static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, const struct kvm_book3e_206_tlb_entry *tlbe) { gpa_t gpa; if (!get_tlb_v(tlbe)) return 0; #ifndef CONFIG_KVM_BOOKE_HV /* Does it match current guest AS? */ /* XXX what about IS != DS? */ if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS)) return 0; #endif gpa = get_tlb_raddr(tlbe); if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) /* Mapping is not for RAM. */ return 0; return 1; } static inline struct kvm_book3e_206_tlb_entry *get_entry( struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry) { int offset = vcpu_e500->gtlb_offset[tlbsel]; return &vcpu_e500->gtlb_arch[offset + entry]; } void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, struct kvm_book3e_206_tlb_entry *gtlbe); void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500); #ifdef CONFIG_KVM_BOOKE_HV #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe) #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu) #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS) #else unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu, struct kvm_book3e_206_tlb_entry *gtlbe); static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu) { struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf; return vcpu_e500->pid[tidseld]; } /* Force TS=1 for all guest mappings. */ #define get_tlb_sts(gtlbe) (MAS1_TS) #endif /* !BOOKE_HV */ #endif /* KVM_E500_H */