| /* |
| * Copyright (C) 2008-2011 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 *); |
| extern void kvmppc_e500_recalc_shadow_pid(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_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 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 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.shared->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__ */ |