/* * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved. * * Author: Yu Liu, yu.liu@freescale.com * * Description: * This file is based on arch/powerpc/kvm/44x_tlb.h, * by Hollis Blanchard <hollisb@us.ibm.com>. * * 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_TLB_H__ #define __KVM_E500_TLB_H__ #include <linux/kvm_host.h> #include <asm/mmu-book3e.h> #include <asm/tlb.h> #include <asm/kvm_e500.h> #define KVM_E500_TLB0_WAY_SIZE_BIT 7 /* Fixed */ #define KVM_E500_TLB0_WAY_SIZE (1UL << KVM_E500_TLB0_WAY_SIZE_BIT) #define KVM_E500_TLB0_WAY_SIZE_MASK (KVM_E500_TLB0_WAY_SIZE - 1) #define KVM_E500_TLB0_WAY_NUM_BIT 1 /* No greater than 7 */ #define KVM_E500_TLB0_WAY_NUM (1UL << KVM_E500_TLB0_WAY_NUM_BIT) #define KVM_E500_TLB0_WAY_NUM_MASK (KVM_E500_TLB0_WAY_NUM - 1) #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) extern void kvmppc_dump_tlbs(struct kvm_vcpu *); extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong); extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *); extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *); extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int); extern int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *, int); extern int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int); extern void kvmppc_e500_tlb_put(struct kvm_vcpu *); extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int); extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *); extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *); extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *); /* TLB helper functions */ static inline unsigned int get_tlb_size(const struct tlbe *tlbe) { return (tlbe->mas1 >> 7) & 0x1f; } static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe) { return tlbe->mas2 & 0xfffff000; } static inline u64 get_tlb_bytes(const struct tlbe *tlbe) { unsigned int pgsize = get_tlb_size(tlbe); return 1ULL << 10 << pgsize; } static inline gva_t get_tlb_end(const struct tlbe *tlbe) { u64 bytes = get_tlb_bytes(tlbe); return get_tlb_eaddr(tlbe) + bytes - 1; } static inline u64 get_tlb_raddr(const struct tlbe *tlbe) { u64 rpn = tlbe->mas7; return (rpn << 32) | (tlbe->mas3 & 0xfffff000); } static inline unsigned int get_tlb_tid(const struct tlbe *tlbe) { return (tlbe->mas1 >> 16) & 0xff; } static inline unsigned int get_tlb_ts(const struct tlbe *tlbe) { return (tlbe->mas1 >> 12) & 0x1; } static inline unsigned int get_tlb_v(const struct tlbe *tlbe) { return (tlbe->mas1 >> 31) & 0x1; } static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe) { return (tlbe->mas1 >> 30) & 0x1; } static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) { return vcpu->arch.pid & 0xff; } static inline unsigned int get_cur_spid( const struct kvmppc_vcpu_e500 *vcpu_e500) { return (vcpu_e500->mas6 >> 16) & 0xff; } static inline unsigned int get_cur_sas( const struct kvmppc_vcpu_e500 *vcpu_e500) { return vcpu_e500->mas6 & 0x1; } static inline unsigned int get_tlb_tlbsel( const struct kvmppc_vcpu_e500 *vcpu_e500) { /* * Manual says that tlbsel has 2 bits wide. * Since we only have two TLBs, only lower bit is used. */ return (vcpu_e500->mas0 >> 28) & 0x1; } static inline unsigned int get_tlb_nv_bit( const struct kvmppc_vcpu_e500 *vcpu_e500) { return vcpu_e500->mas0 & 0xfff; } static inline unsigned int get_tlb_esel_bit( const struct kvmppc_vcpu_e500 *vcpu_e500) { return (vcpu_e500->mas0 >> 16) & 0xfff; } static inline unsigned int get_tlb_esel( const struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel) { unsigned int esel = get_tlb_esel_bit(vcpu_e500); if (tlbsel == 0) { esel &= KVM_E500_TLB0_WAY_NUM_MASK; esel |= ((vcpu_e500->mas2 >> 12) & KVM_E500_TLB0_WAY_SIZE_MASK) << KVM_E500_TLB0_WAY_NUM_BIT; } else { esel &= KVM_E500_TLB1_SIZE - 1; } return esel; } static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, const struct tlbe *tlbe) { gpa_t gpa; if (!get_tlb_v(tlbe)) return 0; /* Does it match current guest AS? */ /* XXX what about IS != DS? */ if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS)) return 0; gpa = get_tlb_raddr(tlbe); if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) /* Mapping is not for RAM. */ return 0; return 1; } #endif /* __KVM_E500_TLB_H__ */