LXR linux/arch/arm/include/asm/kvm

   1/*
   2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
   3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License, version 2, as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17 */
  18
  19#ifndef __ARM_KVM_EMULATE_H__
  20#define __ARM_KVM_EMULATE_H__
  21
  22#include <linux/kvm_host.h>
  23#include <asm/kvm_asm.h>
  24#include <asm/kvm_mmio.h>
  25#include <asm/kvm_arm.h>
  26
  27unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
  28unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
  29
  30bool kvm_condition_valid(struct kvm_vcpu *vcpu);
  31void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr);
  32void kvm_inject_undefined(struct kvm_vcpu *vcpu);
  33void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
  34void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
  35
  36static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
  37{
  38        return 1;
  39}
  40
  41static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
  42{
  43        return &vcpu->arch.regs.usr_regs.ARM_pc;
  44}
  45
  46static inline unsigned long *vcpu_cpsr(struct kvm_vcpu *vcpu)
  47{
  48        return &vcpu->arch.regs.usr_regs.ARM_cpsr;
  49}
  50
  51static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
  52{
  53        *vcpu_cpsr(vcpu) |= PSR_T_BIT;
  54}
  55
  56static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
  57{
  58        unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
  59        return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
  60}
  61
  62static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
  63{
  64        unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
  65        return cpsr_mode > USR_MODE;;
  66}
  67
  68static inline u32 kvm_vcpu_get_hsr(struct kvm_vcpu *vcpu)
  69{
  70        return vcpu->arch.fault.hsr;
  71}
  72
  73static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
  74{
  75        return vcpu->arch.fault.hxfar;
  76}
  77
  78static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
  79{
  80        return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
  81}
  82
  83static inline unsigned long kvm_vcpu_get_hyp_pc(struct kvm_vcpu *vcpu)
  84{
  85        return vcpu->arch.fault.hyp_pc;
  86}
  87
  88static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
  89{
  90        return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
  91}
  92
  93static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
  94{
  95        return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
  96}
  97
  98static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
  99{
 100        return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
 101}
 102
 103static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
 104{
 105        return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
 106}
 107
 108static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
 109{
 110        return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_EA;
 111}
 112
 113static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
 114{
 115        return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
 116}
 117
 118/* Get Access Size from a data abort */
 119static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
 120{
 121        switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
 122        case 0:
 123                return 1;
 124        case 1:
 125                return 2;
 126        case 2:
 127                return 4;
 128        default:
 129                kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
 130                return -EFAULT;
 131        }
 132}
 133
 134/* This one is not specific to Data Abort */
 135static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
 136{
 137        return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
 138}
 139
 140static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
 141{
 142        return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
 143}
 144
 145static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
 146{
 147        return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
 148}
 149
 150static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
 151{
 152        return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
 153}
 154
 155static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
 156{
 157        return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
 158}
 159
 160#endif /* __ARM_KVM_EMULATE_H__ */
 161