442 lines
15 KiB
C
442 lines
15 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012,2013 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*/
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#ifndef __ARM64_KVM_ARM_H__
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#define __ARM64_KVM_ARM_H__
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#include <asm/esr.h>
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#include <asm/memory.h>
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#include <asm/sysreg.h>
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#include <asm/types.h>
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/* Hyp Configuration Register (HCR) bits */
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#define HCR_TID5 (UL(1) << 58)
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#define HCR_DCT (UL(1) << 57)
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#define HCR_ATA_SHIFT 56
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#define HCR_ATA (UL(1) << HCR_ATA_SHIFT)
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#define HCR_TTLBOS (UL(1) << 55)
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#define HCR_TTLBIS (UL(1) << 54)
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#define HCR_ENSCXT (UL(1) << 53)
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#define HCR_TOCU (UL(1) << 52)
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#define HCR_AMVOFFEN (UL(1) << 51)
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#define HCR_TICAB (UL(1) << 50)
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#define HCR_TID4 (UL(1) << 49)
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#define HCR_FIEN (UL(1) << 47)
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#define HCR_FWB (UL(1) << 46)
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#define HCR_NV2 (UL(1) << 45)
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#define HCR_AT (UL(1) << 44)
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#define HCR_NV1 (UL(1) << 43)
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#define HCR_NV (UL(1) << 42)
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#define HCR_API (UL(1) << 41)
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#define HCR_APK (UL(1) << 40)
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#define HCR_TEA (UL(1) << 37)
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#define HCR_TERR (UL(1) << 36)
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#define HCR_TLOR (UL(1) << 35)
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#define HCR_E2H (UL(1) << 34)
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#define HCR_ID (UL(1) << 33)
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#define HCR_CD (UL(1) << 32)
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#define HCR_RW_SHIFT 31
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#define HCR_RW (UL(1) << HCR_RW_SHIFT)
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#define HCR_TRVM (UL(1) << 30)
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#define HCR_HCD (UL(1) << 29)
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#define HCR_TDZ (UL(1) << 28)
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#define HCR_TGE (UL(1) << 27)
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#define HCR_TVM (UL(1) << 26)
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#define HCR_TTLB (UL(1) << 25)
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#define HCR_TPU (UL(1) << 24)
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#define HCR_TPC (UL(1) << 23) /* HCR_TPCP if FEAT_DPB */
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#define HCR_TSW (UL(1) << 22)
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#define HCR_TACR (UL(1) << 21)
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#define HCR_TIDCP (UL(1) << 20)
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#define HCR_TSC (UL(1) << 19)
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#define HCR_TID3 (UL(1) << 18)
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#define HCR_TID2 (UL(1) << 17)
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#define HCR_TID1 (UL(1) << 16)
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#define HCR_TID0 (UL(1) << 15)
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#define HCR_TWE (UL(1) << 14)
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#define HCR_TWI (UL(1) << 13)
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#define HCR_DC (UL(1) << 12)
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#define HCR_BSU (3 << 10)
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#define HCR_BSU_IS (UL(1) << 10)
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#define HCR_FB (UL(1) << 9)
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#define HCR_VSE (UL(1) << 8)
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#define HCR_VI (UL(1) << 7)
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#define HCR_VF (UL(1) << 6)
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#define HCR_AMO (UL(1) << 5)
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#define HCR_IMO (UL(1) << 4)
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#define HCR_FMO (UL(1) << 3)
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#define HCR_PTW (UL(1) << 2)
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#define HCR_SWIO (UL(1) << 1)
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#define HCR_VM (UL(1) << 0)
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#define HCR_RES0 ((UL(1) << 48) | (UL(1) << 39))
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/*
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* The bits we set in HCR:
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* TLOR: Trap LORegion register accesses
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* RW: 64bit by default, can be overridden for 32bit VMs
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* TACR: Trap ACTLR
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* TSC: Trap SMC
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* TSW: Trap cache operations by set/way
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* TWE: Trap WFE
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* TWI: Trap WFI
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* TIDCP: Trap L2CTLR/L2ECTLR
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* BSU_IS: Upgrade barriers to the inner shareable domain
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* FB: Force broadcast of all maintenance operations
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* AMO: Override CPSR.A and enable signaling with VA
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* IMO: Override CPSR.I and enable signaling with VI
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* FMO: Override CPSR.F and enable signaling with VF
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* SWIO: Turn set/way invalidates into set/way clean+invalidate
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* PTW: Take a stage2 fault if a stage1 walk steps in device memory
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* TID3: Trap EL1 reads of group 3 ID registers
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* TID2: Trap CTR_EL0, CCSIDR2_EL1, CLIDR_EL1, and CSSELR_EL1
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*/
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#define HCR_GUEST_FLAGS (HCR_TSC | HCR_TSW | HCR_TWE | HCR_TWI | HCR_VM | \
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HCR_BSU_IS | HCR_FB | HCR_TACR | \
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HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR | \
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HCR_FMO | HCR_IMO | HCR_PTW | HCR_TID3)
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#define HCR_HOST_NVHE_FLAGS (HCR_RW | HCR_API | HCR_APK | HCR_ATA)
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#define HCR_HOST_NVHE_PROTECTED_FLAGS (HCR_HOST_NVHE_FLAGS | HCR_TSC)
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#define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H)
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#define HCRX_GUEST_FLAGS (HCRX_EL2_SMPME | HCRX_EL2_TCR2En)
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#define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En | HCRX_EL2_EnFPM)
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/* TCR_EL2 Registers bits */
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#define TCR_EL2_DS (1UL << 32)
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#define TCR_EL2_RES1 ((1U << 31) | (1 << 23))
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#define TCR_EL2_TBI (1 << 20)
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#define TCR_EL2_PS_SHIFT 16
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#define TCR_EL2_PS_MASK (7 << TCR_EL2_PS_SHIFT)
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#define TCR_EL2_PS_40B (2 << TCR_EL2_PS_SHIFT)
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#define TCR_EL2_TG0_MASK TCR_TG0_MASK
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#define TCR_EL2_SH0_MASK TCR_SH0_MASK
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#define TCR_EL2_ORGN0_MASK TCR_ORGN0_MASK
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#define TCR_EL2_IRGN0_MASK TCR_IRGN0_MASK
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#define TCR_EL2_T0SZ_MASK 0x3f
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#define TCR_EL2_MASK (TCR_EL2_TG0_MASK | TCR_EL2_SH0_MASK | \
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TCR_EL2_ORGN0_MASK | TCR_EL2_IRGN0_MASK | TCR_EL2_T0SZ_MASK)
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/* VTCR_EL2 Registers bits */
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#define VTCR_EL2_DS TCR_EL2_DS
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#define VTCR_EL2_RES1 (1U << 31)
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#define VTCR_EL2_HD (1 << 22)
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#define VTCR_EL2_HA (1 << 21)
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#define VTCR_EL2_PS_SHIFT TCR_EL2_PS_SHIFT
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#define VTCR_EL2_PS_MASK TCR_EL2_PS_MASK
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#define VTCR_EL2_TG0_MASK TCR_TG0_MASK
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#define VTCR_EL2_TG0_4K TCR_TG0_4K
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#define VTCR_EL2_TG0_16K TCR_TG0_16K
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#define VTCR_EL2_TG0_64K TCR_TG0_64K
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#define VTCR_EL2_SH0_MASK TCR_SH0_MASK
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#define VTCR_EL2_SH0_INNER TCR_SH0_INNER
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#define VTCR_EL2_ORGN0_MASK TCR_ORGN0_MASK
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#define VTCR_EL2_ORGN0_WBWA TCR_ORGN0_WBWA
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#define VTCR_EL2_IRGN0_MASK TCR_IRGN0_MASK
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#define VTCR_EL2_IRGN0_WBWA TCR_IRGN0_WBWA
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#define VTCR_EL2_SL0_SHIFT 6
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#define VTCR_EL2_SL0_MASK (3 << VTCR_EL2_SL0_SHIFT)
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#define VTCR_EL2_T0SZ_MASK 0x3f
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#define VTCR_EL2_VS_SHIFT 19
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#define VTCR_EL2_VS_8BIT (0 << VTCR_EL2_VS_SHIFT)
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#define VTCR_EL2_VS_16BIT (1 << VTCR_EL2_VS_SHIFT)
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#define VTCR_EL2_T0SZ(x) TCR_T0SZ(x)
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/*
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* We configure the Stage-2 page tables to always restrict the IPA space to be
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* 40 bits wide (T0SZ = 24). Systems with a PARange smaller than 40 bits are
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* not known to exist and will break with this configuration.
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*
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* The VTCR_EL2 is configured per VM and is initialised in kvm_init_stage2_mmu.
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*
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* Note that when using 4K pages, we concatenate two first level page tables
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* together. With 16K pages, we concatenate 16 first level page tables.
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*
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*/
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#define VTCR_EL2_COMMON_BITS (VTCR_EL2_SH0_INNER | VTCR_EL2_ORGN0_WBWA | \
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VTCR_EL2_IRGN0_WBWA | VTCR_EL2_RES1)
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/*
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* VTCR_EL2:SL0 indicates the entry level for Stage2 translation.
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* Interestingly, it depends on the page size.
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* See D.10.2.121, VTCR_EL2, in ARM DDI 0487C.a
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*
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* -----------------------------------------
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* | Entry level | 4K | 16K/64K |
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* ------------------------------------------
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* | Level: 0 | 2 | - |
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* ------------------------------------------
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* | Level: 1 | 1 | 2 |
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* ------------------------------------------
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* | Level: 2 | 0 | 1 |
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* ------------------------------------------
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* | Level: 3 | - | 0 |
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* ------------------------------------------
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*
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* The table roughly translates to :
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*
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* SL0(PAGE_SIZE, Entry_level) = TGRAN_SL0_BASE - Entry_Level
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*
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* Where TGRAN_SL0_BASE is a magic number depending on the page size:
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* TGRAN_SL0_BASE(4K) = 2
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* TGRAN_SL0_BASE(16K) = 3
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* TGRAN_SL0_BASE(64K) = 3
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* provided we take care of ruling out the unsupported cases and
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* Entry_Level = 4 - Number_of_levels.
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*
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*/
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#ifdef CONFIG_ARM64_64K_PAGES
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#define VTCR_EL2_TGRAN VTCR_EL2_TG0_64K
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#define VTCR_EL2_TGRAN_SL0_BASE 3UL
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#elif defined(CONFIG_ARM64_16K_PAGES)
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#define VTCR_EL2_TGRAN VTCR_EL2_TG0_16K
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#define VTCR_EL2_TGRAN_SL0_BASE 3UL
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#else /* 4K */
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#define VTCR_EL2_TGRAN VTCR_EL2_TG0_4K
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#define VTCR_EL2_TGRAN_SL0_BASE 2UL
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#endif
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#define VTCR_EL2_LVLS_TO_SL0(levels) \
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((VTCR_EL2_TGRAN_SL0_BASE - (4 - (levels))) << VTCR_EL2_SL0_SHIFT)
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#define VTCR_EL2_SL0_TO_LVLS(sl0) \
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((sl0) + 4 - VTCR_EL2_TGRAN_SL0_BASE)
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#define VTCR_EL2_LVLS(vtcr) \
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VTCR_EL2_SL0_TO_LVLS(((vtcr) & VTCR_EL2_SL0_MASK) >> VTCR_EL2_SL0_SHIFT)
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#define VTCR_EL2_FLAGS (VTCR_EL2_COMMON_BITS | VTCR_EL2_TGRAN)
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#define VTCR_EL2_IPA(vtcr) (64 - ((vtcr) & VTCR_EL2_T0SZ_MASK))
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/*
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* ARM VMSAv8-64 defines an algorithm for finding the translation table
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* descriptors in section D4.2.8 in ARM DDI 0487C.a.
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*
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* The algorithm defines the expectations on the translation table
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* addresses for each level, based on PAGE_SIZE, entry level
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* and the translation table size (T0SZ). The variable "x" in the
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* algorithm determines the alignment of a table base address at a given
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* level and thus determines the alignment of VTTBR:BADDR for stage2
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* page table entry level.
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* Since the number of bits resolved at the entry level could vary
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* depending on the T0SZ, the value of "x" is defined based on a
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* Magic constant for a given PAGE_SIZE and Entry Level. The
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* intermediate levels must be always aligned to the PAGE_SIZE (i.e,
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* x = PAGE_SHIFT).
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*
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* The value of "x" for entry level is calculated as :
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* x = Magic_N - T0SZ
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*
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* where Magic_N is an integer depending on the page size and the entry
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* level of the page table as below:
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*
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* --------------------------------------------
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* | Entry level | 4K 16K 64K |
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* --------------------------------------------
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* | Level: 0 (4 levels) | 28 | - | - |
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* --------------------------------------------
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* | Level: 1 (3 levels) | 37 | 31 | 25 |
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* --------------------------------------------
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* | Level: 2 (2 levels) | 46 | 42 | 38 |
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* --------------------------------------------
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* | Level: 3 (1 level) | - | 53 | 51 |
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* --------------------------------------------
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*
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* We have a magic formula for the Magic_N below:
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*
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* Magic_N(PAGE_SIZE, Level) = 64 - ((PAGE_SHIFT - 3) * Number_of_levels)
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*
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* where Number_of_levels = (4 - Level). We are only interested in the
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* value for Entry_Level for the stage2 page table.
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*
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* So, given that T0SZ = (64 - IPA_SHIFT), we can compute 'x' as follows:
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*
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* x = (64 - ((PAGE_SHIFT - 3) * Number_of_levels)) - (64 - IPA_SHIFT)
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* = IPA_SHIFT - ((PAGE_SHIFT - 3) * Number of levels)
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*
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* Here is one way to explain the Magic Formula:
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*
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* x = log2(Size_of_Entry_Level_Table)
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*
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* Since, we can resolve (PAGE_SHIFT - 3) bits at each level, and another
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* PAGE_SHIFT bits in the PTE, we have :
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*
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* Bits_Entry_level = IPA_SHIFT - ((PAGE_SHIFT - 3) * (n - 1) + PAGE_SHIFT)
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* = IPA_SHIFT - (PAGE_SHIFT - 3) * n - 3
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* where n = number of levels, and since each pointer is 8bytes, we have:
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*
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* x = Bits_Entry_Level + 3
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* = IPA_SHIFT - (PAGE_SHIFT - 3) * n
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*
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* The only constraint here is that, we have to find the number of page table
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* levels for a given IPA size (which we do, see stage2_pt_levels())
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*/
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#define ARM64_VTTBR_X(ipa, levels) ((ipa) - ((levels) * (PAGE_SHIFT - 3)))
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#define VTTBR_CNP_BIT (UL(1))
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#define VTTBR_VMID_SHIFT (UL(48))
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#define VTTBR_VMID_MASK(size) (_AT(u64, (1 << size) - 1) << VTTBR_VMID_SHIFT)
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/* Hyp System Trap Register */
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#define HSTR_EL2_T(x) (1 << x)
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/* Hyp Coprocessor Trap Register Shifts */
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#define CPTR_EL2_TFP_SHIFT 10
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/* Hyp Coprocessor Trap Register */
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#define CPTR_EL2_TCPAC (1U << 31)
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#define CPTR_EL2_TAM (1 << 30)
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#define CPTR_EL2_TTA (1 << 20)
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#define CPTR_EL2_TSM (1 << 12)
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#define CPTR_EL2_TFP (1 << CPTR_EL2_TFP_SHIFT)
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#define CPTR_EL2_TZ (1 << 8)
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#define CPTR_NVHE_EL2_RES1 0x000032ff /* known RES1 bits in CPTR_EL2 (nVHE) */
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#define CPTR_NVHE_EL2_RES0 (GENMASK(63, 32) | \
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GENMASK(29, 21) | \
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GENMASK(19, 14) | \
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BIT(11))
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#define CPTR_VHE_EL2_RES0 (GENMASK(63, 32) | \
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GENMASK(27, 26) | \
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GENMASK(23, 22) | \
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GENMASK(19, 18) | \
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GENMASK(15, 0))
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/* Hyp Debug Configuration Register bits */
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#define MDCR_EL2_E2TB_MASK (UL(0x3))
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#define MDCR_EL2_E2TB_SHIFT (UL(24))
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#define MDCR_EL2_HPMFZS (UL(1) << 36)
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#define MDCR_EL2_HPMFZO (UL(1) << 29)
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#define MDCR_EL2_MTPME (UL(1) << 28)
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#define MDCR_EL2_TDCC (UL(1) << 27)
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#define MDCR_EL2_HLP (UL(1) << 26)
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#define MDCR_EL2_HCCD (UL(1) << 23)
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#define MDCR_EL2_TTRF (UL(1) << 19)
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#define MDCR_EL2_HPMD (UL(1) << 17)
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#define MDCR_EL2_TPMS (UL(1) << 14)
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#define MDCR_EL2_E2PB_MASK (UL(0x3))
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#define MDCR_EL2_E2PB_SHIFT (UL(12))
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#define MDCR_EL2_TDRA (UL(1) << 11)
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#define MDCR_EL2_TDOSA (UL(1) << 10)
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#define MDCR_EL2_TDA (UL(1) << 9)
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#define MDCR_EL2_TDE (UL(1) << 8)
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#define MDCR_EL2_HPME (UL(1) << 7)
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#define MDCR_EL2_TPM (UL(1) << 6)
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#define MDCR_EL2_TPMCR (UL(1) << 5)
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#define MDCR_EL2_HPMN_MASK (UL(0x1F))
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#define MDCR_EL2_RES0 (GENMASK(63, 37) | \
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GENMASK(35, 30) | \
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GENMASK(25, 24) | \
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GENMASK(22, 20) | \
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BIT(18) | \
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GENMASK(16, 15))
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/*
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* FGT register definitions
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*
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* RES0 and polarity masks as of DDI0487J.a, to be updated as needed.
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* We're not using the generated masks as they are usually ahead of
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* the published ARM ARM, which we use as a reference.
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*
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* Once we get to a point where the two describe the same thing, we'll
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* merge the definitions. One day.
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*/
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#define __HFGRTR_EL2_RES0 HFGxTR_EL2_RES0
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#define __HFGRTR_EL2_MASK GENMASK(49, 0)
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#define __HFGRTR_EL2_nMASK ~(__HFGRTR_EL2_RES0 | __HFGRTR_EL2_MASK)
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/*
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* The HFGWTR bits are a subset of HFGRTR bits. To ensure we don't miss any
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* future additions, define __HFGWTR* macros relative to __HFGRTR* ones.
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*/
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#define __HFGRTR_ONLY_MASK (BIT(46) | BIT(42) | BIT(40) | BIT(28) | \
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GENMASK(26, 25) | BIT(21) | BIT(18) | \
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GENMASK(15, 14) | GENMASK(10, 9) | BIT(2))
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#define __HFGWTR_EL2_RES0 (__HFGRTR_EL2_RES0 | __HFGRTR_ONLY_MASK)
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#define __HFGWTR_EL2_MASK (__HFGRTR_EL2_MASK & ~__HFGRTR_ONLY_MASK)
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#define __HFGWTR_EL2_nMASK ~(__HFGWTR_EL2_RES0 | __HFGWTR_EL2_MASK)
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#define __HFGITR_EL2_RES0 HFGITR_EL2_RES0
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#define __HFGITR_EL2_MASK (BIT(62) | BIT(60) | GENMASK(54, 0))
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#define __HFGITR_EL2_nMASK ~(__HFGITR_EL2_RES0 | __HFGITR_EL2_MASK)
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#define __HDFGRTR_EL2_RES0 HDFGRTR_EL2_RES0
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#define __HDFGRTR_EL2_MASK (BIT(63) | GENMASK(58, 50) | GENMASK(48, 43) | \
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GENMASK(41, 40) | GENMASK(37, 22) | \
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GENMASK(19, 9) | GENMASK(7, 0))
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#define __HDFGRTR_EL2_nMASK ~(__HDFGRTR_EL2_RES0 | __HDFGRTR_EL2_MASK)
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#define __HDFGWTR_EL2_RES0 HDFGWTR_EL2_RES0
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#define __HDFGWTR_EL2_MASK (GENMASK(57, 52) | GENMASK(50, 48) | \
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GENMASK(46, 44) | GENMASK(42, 41) | \
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GENMASK(37, 35) | GENMASK(33, 31) | \
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GENMASK(29, 23) | GENMASK(21, 10) | \
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GENMASK(8, 7) | GENMASK(5, 0))
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#define __HDFGWTR_EL2_nMASK ~(__HDFGWTR_EL2_RES0 | __HDFGWTR_EL2_MASK)
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#define __HAFGRTR_EL2_RES0 HAFGRTR_EL2_RES0
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#define __HAFGRTR_EL2_MASK (GENMASK(49, 17) | GENMASK(4, 0))
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#define __HAFGRTR_EL2_nMASK ~(__HAFGRTR_EL2_RES0 | __HAFGRTR_EL2_MASK)
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/* Similar definitions for HCRX_EL2 */
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#define __HCRX_EL2_RES0 HCRX_EL2_RES0
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#define __HCRX_EL2_MASK (BIT(6))
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#define __HCRX_EL2_nMASK ~(__HCRX_EL2_RES0 | __HCRX_EL2_MASK)
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/* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */
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#define HPFAR_MASK (~UL(0xf))
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/*
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* We have
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* PAR [PA_Shift - 1 : 12] = PA [PA_Shift - 1 : 12]
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* HPFAR [PA_Shift - 9 : 4] = FIPA [PA_Shift - 1 : 12]
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*
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* Always assume 52 bit PA since at this point, we don't know how many PA bits
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* the page table has been set up for. This should be safe since unused address
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* bits in PAR are res0.
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*/
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#define PAR_TO_HPFAR(par) \
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(((par) & GENMASK_ULL(52 - 1, 12)) >> 8)
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#define ECN(x) { ESR_ELx_EC_##x, #x }
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#define kvm_arm_exception_class \
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ECN(UNKNOWN), ECN(WFx), ECN(CP15_32), ECN(CP15_64), ECN(CP14_MR), \
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ECN(CP14_LS), ECN(FP_ASIMD), ECN(CP10_ID), ECN(PAC), ECN(CP14_64), \
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ECN(SVC64), ECN(HVC64), ECN(SMC64), ECN(SYS64), ECN(SVE), \
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ECN(IMP_DEF), ECN(IABT_LOW), ECN(IABT_CUR), \
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ECN(PC_ALIGN), ECN(DABT_LOW), ECN(DABT_CUR), \
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ECN(SP_ALIGN), ECN(FP_EXC32), ECN(FP_EXC64), ECN(SERROR), \
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ECN(BREAKPT_LOW), ECN(BREAKPT_CUR), ECN(SOFTSTP_LOW), \
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ECN(SOFTSTP_CUR), ECN(WATCHPT_LOW), ECN(WATCHPT_CUR), \
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ECN(BKPT32), ECN(VECTOR32), ECN(BRK64), ECN(ERET)
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#define CPACR_EL1_TTA (1 << 28)
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#define kvm_mode_names \
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{ PSR_MODE_EL0t, "EL0t" }, \
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{ PSR_MODE_EL1t, "EL1t" }, \
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{ PSR_MODE_EL1h, "EL1h" }, \
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{ PSR_MODE_EL2t, "EL2t" }, \
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{ PSR_MODE_EL2h, "EL2h" }, \
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{ PSR_MODE_EL3t, "EL3t" }, \
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{ PSR_MODE_EL3h, "EL3h" }, \
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{ PSR_AA32_MODE_USR, "32-bit USR" }, \
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{ PSR_AA32_MODE_FIQ, "32-bit FIQ" }, \
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{ PSR_AA32_MODE_IRQ, "32-bit IRQ" }, \
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{ PSR_AA32_MODE_SVC, "32-bit SVC" }, \
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{ PSR_AA32_MODE_ABT, "32-bit ABT" }, \
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{ PSR_AA32_MODE_HYP, "32-bit HYP" }, \
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{ PSR_AA32_MODE_UND, "32-bit UND" }, \
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{ PSR_AA32_MODE_SYS, "32-bit SYS" }
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#endif /* __ARM64_KVM_ARM_H__ */
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