arm64: KVM: Add support for 16-bit VMID
[deliverable/linux.git] / arch / arm64 / include / asm / kvm_arm.h
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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
6e53031e 21#include <asm/esr.h>
286fb1cc 22#include <asm/memory.h>
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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
4d44923b 67 * TVM: Trap VM ops (until M+C set in SCTLR_EL1)
0369f6a3 68 * TSW: Trap cache operations by set/way
d241aac7 69 * TWE: Trap WFE
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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 */
d241aac7 79#define HCR_GUEST_FLAGS (HCR_TSC | HCR_TSW | HCR_TWE | HCR_TWI | HCR_VM | \
4d44923b 80 HCR_TVM | HCR_BSU_IS | HCR_FB | HCR_TAC | \
ac3c3747 81 HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW)
0369f6a3 82#define HCR_VIRT_EXCP_MASK (HCR_VA | HCR_VI | HCR_VF)
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83#define HCR_INT_OVERRIDE (HCR_FMO | HCR_IMO)
84
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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 */
857d1a97 98#define TCR_EL2_RES1 ((1 << 31) | (1 << 23))
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99#define TCR_EL2_TBI (1 << 20)
100#define TCR_EL2_PS (7 << 16)
101#define TCR_EL2_PS_40B (2 << 16)
102#define TCR_EL2_TG0 (1 << 14)
103#define TCR_EL2_SH0 (3 << 12)
104#define TCR_EL2_ORGN0 (3 << 10)
105#define TCR_EL2_IRGN0 (3 << 8)
106#define TCR_EL2_T0SZ 0x3f
107#define TCR_EL2_MASK (TCR_EL2_TG0 | TCR_EL2_SH0 | \
108 TCR_EL2_ORGN0 | TCR_EL2_IRGN0 | TCR_EL2_T0SZ)
109
857d1a97 110#define TCR_EL2_FLAGS (TCR_EL2_RES1 | TCR_EL2_PS_40B)
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111
112/* VTCR_EL2 Registers bits */
857d1a97 113#define VTCR_EL2_RES1 (1 << 31)
0369f6a3 114#define VTCR_EL2_PS_MASK (7 << 16)
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115#define VTCR_EL2_TG0_MASK (1 << 14)
116#define VTCR_EL2_TG0_4K (0 << 14)
117#define VTCR_EL2_TG0_64K (1 << 14)
118#define VTCR_EL2_SH0_MASK (3 << 12)
119#define VTCR_EL2_SH0_INNER (3 << 12)
120#define VTCR_EL2_ORGN0_MASK (3 << 10)
121#define VTCR_EL2_ORGN0_WBWA (1 << 10)
122#define VTCR_EL2_IRGN0_MASK (3 << 8)
123#define VTCR_EL2_IRGN0_WBWA (1 << 8)
124#define VTCR_EL2_SL0_MASK (3 << 6)
125#define VTCR_EL2_SL0_LVL1 (1 << 6)
126#define VTCR_EL2_T0SZ_MASK 0x3f
127#define VTCR_EL2_T0SZ_40B 24
20475f78 128#define VTCR_EL2_VS 19
0369f6a3 129
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130/*
131 * We configure the Stage-2 page tables to always restrict the IPA space to be
132 * 40 bits wide (T0SZ = 24). Systems with a PARange smaller than 40 bits are
133 * not known to exist and will break with this configuration.
134 *
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135 * VTCR_EL2.PS is extracted from ID_AA64MMFR0_EL1.PARange at boot time
136 * (see hyp-init.S).
137 *
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138 * Note that when using 4K pages, we concatenate two first level page tables
139 * together.
140 *
141 * The magic numbers used for VTTBR_X in this patch can be found in Tables
142 * D4-23 and D4-25 in ARM DDI 0487A.b.
143 */
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144#ifdef CONFIG_ARM64_64K_PAGES
145/*
146 * Stage2 translation configuration:
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147 * 40bits input (T0SZ = 24)
148 * 64kB pages (TG0 = 1)
149 * 2 level page tables (SL = 1)
150 */
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151#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \
152 VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
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153 VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B | \
154 VTCR_EL2_RES1)
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155#define VTTBR_X (38 - VTCR_EL2_T0SZ_40B)
156#else
157/*
158 * Stage2 translation configuration:
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159 * 40bits input (T0SZ = 24)
160 * 4kB pages (TG0 = 0)
161 * 3 level page tables (SL = 1)
162 */
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163#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \
164 VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
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165 VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B | \
166 VTCR_EL2_RES1)
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167#define VTTBR_X (37 - VTCR_EL2_T0SZ_40B)
168#endif
169
170#define VTTBR_BADDR_SHIFT (VTTBR_X - 1)
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171#define VTTBR_BADDR_MASK (((UL(1) << (PHYS_MASK_SHIFT - VTTBR_X)) - 1) << VTTBR_BADDR_SHIFT)
172#define VTTBR_VMID_SHIFT (UL(48))
20475f78 173#define VTTBR_VMID_MASK(size) (_AT(u64, (1 << size) - 1) << VTTBR_VMID_SHIFT)
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174
175/* Hyp System Trap Register */
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176#define HSTR_EL2_T(x) (1 << x)
177
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178/* Hyp Coproccessor Trap Register Shifts */
179#define CPTR_EL2_TFP_SHIFT 10
180
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181/* Hyp Coprocessor Trap Register */
182#define CPTR_EL2_TCPAC (1 << 31)
183#define CPTR_EL2_TTA (1 << 20)
33c76a0b 184#define CPTR_EL2_TFP (1 << CPTR_EL2_TFP_SHIFT)
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185
186/* Hyp Debug Configuration Register bits */
187#define MDCR_EL2_TDRA (1 << 11)
188#define MDCR_EL2_TDOSA (1 << 10)
189#define MDCR_EL2_TDA (1 << 9)
190#define MDCR_EL2_TDE (1 << 8)
191#define MDCR_EL2_HPME (1 << 7)
192#define MDCR_EL2_TPM (1 << 6)
193#define MDCR_EL2_TPMCR (1 << 5)
194#define MDCR_EL2_HPMN_MASK (0x1F)
195
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196/* For compatibility with fault code shared with 32-bit */
197#define FSC_FAULT ESR_ELx_FSC_FAULT
35307b9a 198#define FSC_ACCESS ESR_ELx_FSC_ACCESS
6e53031e 199#define FSC_PERM ESR_ELx_FSC_PERM
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200
201/* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */
286fb1cc 202#define HPFAR_MASK (~UL(0xf))
0369f6a3 203
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204#define kvm_arm_exception_type \
205 {0, "IRQ" }, \
206 {1, "TRAP" }
207
208#define ECN(x) { ESR_ELx_EC_##x, #x }
209
210#define kvm_arm_exception_class \
211 ECN(UNKNOWN), ECN(WFx), ECN(CP15_32), ECN(CP15_64), ECN(CP14_MR), \
212 ECN(CP14_LS), ECN(FP_ASIMD), ECN(CP10_ID), ECN(CP14_64), ECN(SVC64), \
213 ECN(HVC64), ECN(SMC64), ECN(SYS64), ECN(IMP_DEF), ECN(IABT_LOW), \
214 ECN(IABT_CUR), ECN(PC_ALIGN), ECN(DABT_LOW), ECN(DABT_CUR), \
215 ECN(SP_ALIGN), ECN(FP_EXC32), ECN(FP_EXC64), ECN(SERROR), \
216 ECN(BREAKPT_LOW), ECN(BREAKPT_CUR), ECN(SOFTSTP_LOW), \
217 ECN(SOFTSTP_CUR), ECN(WATCHPT_LOW), ECN(WATCHPT_CUR), \
218 ECN(BKPT32), ECN(VECTOR32), ECN(BRK64)
219
0369f6a3 220#endif /* __ARM64_KVM_ARM_H__ */
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