arch/arm64/include/asm/kvm_arm.h

   1 /*
   2  * Copyright (C) 2012,2013 - ARM Ltd
   3  * Author: Marc Zyngier <marc.zyngier@arm.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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __ARM64_KVM_ARM_H__
  19 #define __ARM64_KVM_ARM_H__
  20
  21 #include <asm/esr.h>
  22 #include <asm/memory.h>
  23 #include <asm/types.h>
  24
  25 /* Hyp Configuration Register (HCR) bits */
  26 #define HCR_ID          (UL(1) << 33)
  27 #define HCR_CD          (UL(1) << 32)
  28 #define HCR_RW_SHIFT    31
  29 #define HCR_RW          (UL(1) << HCR_RW_SHIFT)
  30 #define HCR_TRVM        (UL(1) << 30)
  31 #define HCR_HCD         (UL(1) << 29)
  32 #define HCR_TDZ         (UL(1) << 28)
  33 #define HCR_TGE         (UL(1) << 27)
  34 #define HCR_TVM         (UL(1) << 26)
  35 #define HCR_TTLB        (UL(1) << 25)
  36 #define HCR_TPU         (UL(1) << 24)
  37 #define HCR_TPC         (UL(1) << 23)
  38 #define HCR_TSW         (UL(1) << 22)
  39 #define HCR_TAC         (UL(1) << 21)
  40 #define HCR_TIDCP       (UL(1) << 20)
  41 #define HCR_TSC         (UL(1) << 19)
  42 #define HCR_TID3        (UL(1) << 18)
  43 #define HCR_TID2        (UL(1) << 17)
  44 #define HCR_TID1        (UL(1) << 16)
  45 #define HCR_TID0        (UL(1) << 15)
  46 #define HCR_TWE         (UL(1) << 14)
  47 #define HCR_TWI         (UL(1) << 13)
  48 #define HCR_DC          (UL(1) << 12)
  49 #define HCR_BSU         (3 << 10)
  50 #define HCR_BSU_IS      (UL(1) << 10)
  51 #define HCR_FB          (UL(1) << 9)
  52 #define HCR_VA          (UL(1) << 8)
  53 #define HCR_VI          (UL(1) << 7)
  54 #define HCR_VF          (UL(1) << 6)
  55 #define HCR_AMO         (UL(1) << 5)
  56 #define HCR_IMO         (UL(1) << 4)
  57 #define HCR_FMO         (UL(1) << 3)
  58 #define HCR_PTW         (UL(1) << 2)
  59 #define HCR_SWIO        (UL(1) << 1)
  60 #define HCR_VM          (UL(1) << 0)
  61
  62 /*
  63  * The bits we set in HCR:
  64  * RW:          64bit by default, can be overriden for 32bit VMs
  65  * TAC:         Trap ACTLR
  66  * TSC:         Trap SMC
  67  * TVM:         Trap VM ops (until M+C set in SCTLR_EL1)
  68  * TSW:         Trap cache operations by set/way
  69  * TWE:         Trap WFE
  70  * TWI:         Trap WFI
  71  * TIDCP:       Trap L2CTLR/L2ECTLR
  72  * BSU_IS:      Upgrade barriers to the inner shareable domain
  73  * FB:          Force broadcast of all maintainance operations
  74  * AMO:         Override CPSR.A and enable signaling with VA
  75  * IMO:         Override CPSR.I and enable signaling with VI
  76  * FMO:         Override CPSR.F and enable signaling with VF
  77  * SWIO:        Turn set/way invalidates into set/way clean+invalidate
  78  */
  79 #define HCR_GUEST_FLAGS (HCR_TSC | HCR_TSW | HCR_TWE | HCR_TWI | HCR_VM | \
  80                          HCR_TVM | HCR_BSU_IS | HCR_FB | HCR_TAC | \
  81                          HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW)
  82 #define HCR_VIRT_EXCP_MASK (HCR_VA | HCR_VI | HCR_VF)
  83 #define HCR_INT_OVERRIDE   (HCR_FMO | HCR_IMO)
  84
  85
  86 /* Hyp System Control Register (SCTLR_EL2) bits */
  87 #define SCTLR_EL2_EE    (1 << 25)
  88 #define SCTLR_EL2_WXN   (1 << 19)
  89 #define SCTLR_EL2_I     (1 << 12)
  90 #define SCTLR_EL2_SA    (1 << 3)
  91 #define SCTLR_EL2_C     (1 << 2)
  92 #define SCTLR_EL2_A     (1 << 1)
  93 #define SCTLR_EL2_M     1
  94 #define SCTLR_EL2_FLAGS (SCTLR_EL2_M | SCTLR_EL2_A | SCTLR_EL2_C |      \
  95                          SCTLR_EL2_SA | SCTLR_EL2_I)
  96
  97 /* TCR_EL2 Registers bits */
  98 #define TCR_EL2_TBI     (1 << 20)
  99 #define TCR_EL2_PS      (7 << 16)
 100 #define TCR_EL2_PS_40B  (2 << 16)
 101 #define TCR_EL2_TG0     (1 << 14)
 102 #define TCR_EL2_SH0     (3 << 12)
 103 #define TCR_EL2_ORGN0   (3 << 10)
 104 #define TCR_EL2_IRGN0   (3 << 8)
 105 #define TCR_EL2_T0SZ    0x3f
 106 #define TCR_EL2_MASK    (TCR_EL2_TG0 | TCR_EL2_SH0 | \
 107                          TCR_EL2_ORGN0 | TCR_EL2_IRGN0 | TCR_EL2_T0SZ)
 108
 109 #define TCR_EL2_FLAGS   (TCR_EL2_PS_40B)
 110
 111 /* VTCR_EL2 Registers bits */
 112 #define VTCR_EL2_PS_MASK        (7 << 16)
 113 #define VTCR_EL2_TG0_MASK       (1 << 14)
 114 #define VTCR_EL2_TG0_4K         (0 << 14)
 115 #define VTCR_EL2_TG0_64K        (1 << 14)
 116 #define VTCR_EL2_SH0_MASK       (3 << 12)
 117 #define VTCR_EL2_SH0_INNER      (3 << 12)
 118 #define VTCR_EL2_ORGN0_MASK     (3 << 10)
 119 #define VTCR_EL2_ORGN0_WBWA     (1 << 10)
 120 #define VTCR_EL2_IRGN0_MASK     (3 << 8)
 121 #define VTCR_EL2_IRGN0_WBWA     (1 << 8)
 122 #define VTCR_EL2_SL0_MASK       (3 << 6)
 123 #define VTCR_EL2_SL0_LVL1       (1 << 6)
 124 #define VTCR_EL2_T0SZ_MASK      0x3f
 125 #define VTCR_EL2_T0SZ_40B       24
 126
 127 /*
 128  * We configure the Stage-2 page tables to always restrict the IPA space to be
 129  * 40 bits wide (T0SZ = 24).  Systems with a PARange smaller than 40 bits are
 130  * not known to exist and will break with this configuration.
 131  *
 132  * VTCR_EL2.PS is extracted from ID_AA64MMFR0_EL1.PARange at boot time
 133  * (see hyp-init.S).
 134  *
 135  * Note that when using 4K pages, we concatenate two first level page tables
 136  * together.
 137  *
 138  * The magic numbers used for VTTBR_X in this patch can be found in Tables
 139  * D4-23 and D4-25 in ARM DDI 0487A.b.
 140  */
 141 #ifdef CONFIG_ARM64_64K_PAGES
 142 /*
 143  * Stage2 translation configuration:
 144  * 40bits input  (T0SZ = 24)
 145  * 64kB pages (TG0 = 1)
 146  * 2 level page tables (SL = 1)
 147  */
 148 #define VTCR_EL2_FLAGS          (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \
 149                                  VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
 150                                  VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B)
 151 #define VTTBR_X         (38 - VTCR_EL2_T0SZ_40B)
 152 #else
 153 /*
 154  * Stage2 translation configuration:
 155  * 40bits input  (T0SZ = 24)
 156  * 4kB pages (TG0 = 0)
 157  * 3 level page tables (SL = 1)
 158  */
 159 #define VTCR_EL2_FLAGS          (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \
 160                                  VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
 161                                  VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B)
 162 #define VTTBR_X         (37 - VTCR_EL2_T0SZ_40B)
 163 #endif
 164
 165 #define VTTBR_BADDR_SHIFT (VTTBR_X - 1)
 166 #define VTTBR_BADDR_MASK  (((UL(1) << (PHYS_MASK_SHIFT - VTTBR_X)) - 1) << VTTBR_BADDR_SHIFT)
 167 #define VTTBR_VMID_SHIFT  (UL(48))
 168 #define VTTBR_VMID_MASK   (UL(0xFF) << VTTBR_VMID_SHIFT)
 169
 170 /* Hyp System Trap Register */
 171 #define HSTR_EL2_TTEE   (1 << 16)
 172 #define HSTR_EL2_T(x)   (1 << x)
 173
 174 /* Hyp Coprocessor Trap Register */
 175 #define CPTR_EL2_TCPAC  (1 << 31)
 176 #define CPTR_EL2_TTA    (1 << 20)
 177 #define CPTR_EL2_TFP    (1 << 10)
 178
 179 /* Hyp Debug Configuration Register bits */
 180 #define MDCR_EL2_TDRA           (1 << 11)
 181 #define MDCR_EL2_TDOSA          (1 << 10)
 182 #define MDCR_EL2_TDA            (1 << 9)
 183 #define MDCR_EL2_TDE            (1 << 8)
 184 #define MDCR_EL2_HPME           (1 << 7)
 185 #define MDCR_EL2_TPM            (1 << 6)
 186 #define MDCR_EL2_TPMCR          (1 << 5)
 187 #define MDCR_EL2_HPMN_MASK      (0x1F)
 188
 189 /* For compatibility with fault code shared with 32-bit */
 190 #define FSC_FAULT       ESR_ELx_FSC_FAULT
 191 #define FSC_PERM        ESR_ELx_FSC_PERM
 192
 193 /* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */
 194 #define HPFAR_MASK      (~UL(0xf))
 195
 196 #endif /* __ARM64_KVM_ARM_H__ */