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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 */
68908bf7 26#define HCR_E2H (UL(1) << 34)
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27#define HCR_ID (UL(1) << 33)
28#define HCR_CD (UL(1) << 32)
29#define HCR_RW_SHIFT 31
30#define HCR_RW (UL(1) << HCR_RW_SHIFT)
31#define HCR_TRVM (UL(1) << 30)
32#define HCR_HCD (UL(1) << 29)
33#define HCR_TDZ (UL(1) << 28)
34#define HCR_TGE (UL(1) << 27)
35#define HCR_TVM (UL(1) << 26)
36#define HCR_TTLB (UL(1) << 25)
37#define HCR_TPU (UL(1) << 24)
38#define HCR_TPC (UL(1) << 23)
39#define HCR_TSW (UL(1) << 22)
40#define HCR_TAC (UL(1) << 21)
41#define HCR_TIDCP (UL(1) << 20)
42#define HCR_TSC (UL(1) << 19)
43#define HCR_TID3 (UL(1) << 18)
44#define HCR_TID2 (UL(1) << 17)
45#define HCR_TID1 (UL(1) << 16)
46#define HCR_TID0 (UL(1) << 15)
47#define HCR_TWE (UL(1) << 14)
48#define HCR_TWI (UL(1) << 13)
49#define HCR_DC (UL(1) << 12)
50#define HCR_BSU (3 << 10)
51#define HCR_BSU_IS (UL(1) << 10)
52#define HCR_FB (UL(1) << 9)
53#define HCR_VA (UL(1) << 8)
54#define HCR_VI (UL(1) << 7)
55#define HCR_VF (UL(1) << 6)
56#define HCR_AMO (UL(1) << 5)
57#define HCR_IMO (UL(1) << 4)
58#define HCR_FMO (UL(1) << 3)
59#define HCR_PTW (UL(1) << 2)
60#define HCR_SWIO (UL(1) << 1)
61#define HCR_VM (UL(1) << 0)
62
63/*
64 * The bits we set in HCR:
ef769e32 65 * RW: 64bit by default, can be overridden for 32bit VMs
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66 * TAC: Trap ACTLR
67 * TSC: Trap SMC
4d44923b 68 * TVM: Trap VM ops (until M+C set in SCTLR_EL1)
0369f6a3 69 * TSW: Trap cache operations by set/way
d241aac7 70 * TWE: Trap WFE
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71 * TWI: Trap WFI
72 * TIDCP: Trap L2CTLR/L2ECTLR
73 * BSU_IS: Upgrade barriers to the inner shareable domain
74 * FB: Force broadcast of all maintainance operations
75 * AMO: Override CPSR.A and enable signaling with VA
76 * IMO: Override CPSR.I and enable signaling with VI
77 * FMO: Override CPSR.F and enable signaling with VF
78 * SWIO: Turn set/way invalidates into set/way clean+invalidate
79 */
d241aac7 80#define HCR_GUEST_FLAGS (HCR_TSC | HCR_TSW | HCR_TWE | HCR_TWI | HCR_VM | \
4d44923b 81 HCR_TVM | HCR_BSU_IS | HCR_FB | HCR_TAC | \
ac3c3747 82 HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW)
0369f6a3 83#define HCR_VIRT_EXCP_MASK (HCR_VA | HCR_VI | HCR_VF)
ac3c3747 84#define HCR_INT_OVERRIDE (HCR_FMO | HCR_IMO)
68908bf7 85#define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H)
0369f6a3 86
0369f6a3 87/* TCR_EL2 Registers bits */
857d1a97 88#define TCR_EL2_RES1 ((1 << 31) | (1 << 23))
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89#define TCR_EL2_TBI (1 << 20)
90#define TCR_EL2_PS (7 << 16)
91#define TCR_EL2_PS_40B (2 << 16)
92#define TCR_EL2_TG0 (1 << 14)
93#define TCR_EL2_SH0 (3 << 12)
94#define TCR_EL2_ORGN0 (3 << 10)
95#define TCR_EL2_IRGN0 (3 << 8)
96#define TCR_EL2_T0SZ 0x3f
97#define TCR_EL2_MASK (TCR_EL2_TG0 | TCR_EL2_SH0 | \
98 TCR_EL2_ORGN0 | TCR_EL2_IRGN0 | TCR_EL2_T0SZ)
99
0369f6a3 100/* VTCR_EL2 Registers bits */
857d1a97 101#define VTCR_EL2_RES1 (1 << 31)
0369f6a3 102#define VTCR_EL2_PS_MASK (7 << 16)
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103#define VTCR_EL2_TG0_MASK (1 << 14)
104#define VTCR_EL2_TG0_4K (0 << 14)
105#define VTCR_EL2_TG0_64K (1 << 14)
106#define VTCR_EL2_SH0_MASK (3 << 12)
107#define VTCR_EL2_SH0_INNER (3 << 12)
108#define VTCR_EL2_ORGN0_MASK (3 << 10)
109#define VTCR_EL2_ORGN0_WBWA (1 << 10)
110#define VTCR_EL2_IRGN0_MASK (3 << 8)
111#define VTCR_EL2_IRGN0_WBWA (1 << 8)
112#define VTCR_EL2_SL0_MASK (3 << 6)
113#define VTCR_EL2_SL0_LVL1 (1 << 6)
114#define VTCR_EL2_T0SZ_MASK 0x3f
115#define VTCR_EL2_T0SZ_40B 24
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116#define VTCR_EL2_VS_SHIFT 19
117#define VTCR_EL2_VS_8BIT (0 << VTCR_EL2_VS_SHIFT)
118#define VTCR_EL2_VS_16BIT (1 << VTCR_EL2_VS_SHIFT)
0369f6a3 119
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120/*
121 * We configure the Stage-2 page tables to always restrict the IPA space to be
122 * 40 bits wide (T0SZ = 24). Systems with a PARange smaller than 40 bits are
123 * not known to exist and will break with this configuration.
124 *
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125 * VTCR_EL2.PS is extracted from ID_AA64MMFR0_EL1.PARange at boot time
126 * (see hyp-init.S).
127 *
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128 * Note that when using 4K pages, we concatenate two first level page tables
129 * together.
130 *
131 * The magic numbers used for VTTBR_X in this patch can be found in Tables
132 * D4-23 and D4-25 in ARM DDI 0487A.b.
133 */
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134#ifdef CONFIG_ARM64_64K_PAGES
135/*
136 * Stage2 translation configuration:
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137 * 40bits input (T0SZ = 24)
138 * 64kB pages (TG0 = 1)
139 * 2 level page tables (SL = 1)
140 */
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141#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \
142 VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
6141570c 143 VTCR_EL2_SL0_LVL1 | VTCR_EL2_RES1)
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144#define VTTBR_X (38 - VTCR_EL2_T0SZ_40B)
145#else
146/*
147 * Stage2 translation configuration:
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148 * 40bits input (T0SZ = 24)
149 * 4kB pages (TG0 = 0)
150 * 3 level page tables (SL = 1)
151 */
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152#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \
153 VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
6141570c 154 VTCR_EL2_SL0_LVL1 | VTCR_EL2_RES1)
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155#define VTTBR_X (37 - VTCR_EL2_T0SZ_40B)
156#endif
157
158#define VTTBR_BADDR_SHIFT (VTTBR_X - 1)
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159#define VTTBR_BADDR_MASK (((UL(1) << (PHYS_MASK_SHIFT - VTTBR_X)) - 1) << VTTBR_BADDR_SHIFT)
160#define VTTBR_VMID_SHIFT (UL(48))
20475f78 161#define VTTBR_VMID_MASK(size) (_AT(u64, (1 << size) - 1) << VTTBR_VMID_SHIFT)
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162
163/* Hyp System Trap Register */
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164#define HSTR_EL2_T(x) (1 << x)
165
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166/* Hyp Coproccessor Trap Register Shifts */
167#define CPTR_EL2_TFP_SHIFT 10
168
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169/* Hyp Coprocessor Trap Register */
170#define CPTR_EL2_TCPAC (1 << 31)
171#define CPTR_EL2_TTA (1 << 20)
33c76a0b 172#define CPTR_EL2_TFP (1 << CPTR_EL2_TFP_SHIFT)
a7e0ac29 173#define CPTR_EL2_DEFAULT 0x000033ff
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174
175/* Hyp Debug Configuration Register bits */
176#define MDCR_EL2_TDRA (1 << 11)
177#define MDCR_EL2_TDOSA (1 << 10)
178#define MDCR_EL2_TDA (1 << 9)
179#define MDCR_EL2_TDE (1 << 8)
180#define MDCR_EL2_HPME (1 << 7)
181#define MDCR_EL2_TPM (1 << 6)
182#define MDCR_EL2_TPMCR (1 << 5)
183#define MDCR_EL2_HPMN_MASK (0x1F)
184
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185/* For compatibility with fault code shared with 32-bit */
186#define FSC_FAULT ESR_ELx_FSC_FAULT
35307b9a 187#define FSC_ACCESS ESR_ELx_FSC_ACCESS
6e53031e 188#define FSC_PERM ESR_ELx_FSC_PERM
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189
190/* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */
286fb1cc 191#define HPFAR_MASK (~UL(0xf))
0369f6a3 192
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193#define kvm_arm_exception_type \
194 {0, "IRQ" }, \
195 {1, "TRAP" }
196
197#define ECN(x) { ESR_ELx_EC_##x, #x }
198
199#define kvm_arm_exception_class \
200 ECN(UNKNOWN), ECN(WFx), ECN(CP15_32), ECN(CP15_64), ECN(CP14_MR), \
201 ECN(CP14_LS), ECN(FP_ASIMD), ECN(CP10_ID), ECN(CP14_64), ECN(SVC64), \
202 ECN(HVC64), ECN(SMC64), ECN(SYS64), ECN(IMP_DEF), ECN(IABT_LOW), \
203 ECN(IABT_CUR), ECN(PC_ALIGN), ECN(DABT_LOW), ECN(DABT_CUR), \
204 ECN(SP_ALIGN), ECN(FP_EXC32), ECN(FP_EXC64), ECN(SERROR), \
205 ECN(BREAKPT_LOW), ECN(BREAKPT_CUR), ECN(SOFTSTP_LOW), \
206 ECN(SOFTSTP_CUR), ECN(WATCHPT_LOW), ECN(WATCHPT_CUR), \
207 ECN(BKPT32), ECN(VECTOR32), ECN(BRK64)
208
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209#define CPACR_EL1_FPEN (3 << 20)
210#define CPACR_EL1_TTA (1 << 28)
211
0369f6a3 212#endif /* __ARM64_KVM_ARM_H__ */