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Current File : /usr/src/linux-headers-5.4.0-216-generic/arch/arm/include/asm/kvm_arm.h
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
 */

#ifndef __ARM_KVM_ARM_H__
#define __ARM_KVM_ARM_H__

#include <linux/const.h>
#include <linux/types.h>

/* Hyp Configuration Register (HCR) bits */
#define HCR_TGE		(1 << 27)
#define HCR_TVM		(1 << 26)
#define HCR_TTLB	(1 << 25)
#define HCR_TPU		(1 << 24)
#define HCR_TPC		(1 << 23)
#define HCR_TSW		(1 << 22)
#define HCR_TAC		(1 << 21)
#define HCR_TIDCP	(1 << 20)
#define HCR_TSC		(1 << 19)
#define HCR_TID3	(1 << 18)
#define HCR_TID2	(1 << 17)
#define HCR_TID1	(1 << 16)
#define HCR_TID0	(1 << 15)
#define HCR_TWE		(1 << 14)
#define HCR_TWI		(1 << 13)
#define HCR_DC		(1 << 12)
#define HCR_BSU		(3 << 10)
#define HCR_BSU_IS	(1 << 10)
#define HCR_FB		(1 << 9)
#define HCR_VA		(1 << 8)
#define HCR_VI		(1 << 7)
#define HCR_VF		(1 << 6)
#define HCR_AMO		(1 << 5)
#define HCR_IMO		(1 << 4)
#define HCR_FMO		(1 << 3)
#define HCR_PTW		(1 << 2)
#define HCR_SWIO	(1 << 1)
#define HCR_VM		1

/*
 * The bits we set in HCR:
 * TAC:		Trap ACTLR
 * TSC:		Trap SMC
 * TVM:		Trap VM ops (until MMU and caches are on)
 * TSW:		Trap cache operations by set/way
 * TWI:		Trap WFI
 * TWE:		Trap WFE
 * TIDCP:	Trap L2CTLR/L2ECTLR
 * BSU_IS:	Upgrade barriers to the inner shareable domain
 * FB:		Force broadcast of all maintainance operations
 * AMO:		Override CPSR.A and enable signaling with VA
 * IMO:		Override CPSR.I and enable signaling with VI
 * FMO:		Override CPSR.F and enable signaling with VF
 * SWIO:	Turn set/way invalidates into set/way clean+invalidate
 */
#define HCR_GUEST_MASK (HCR_TSC | HCR_TSW | HCR_TWI | HCR_VM | HCR_BSU_IS | \
			HCR_FB | HCR_TAC | HCR_AMO | HCR_IMO | HCR_FMO | \
			HCR_TVM | HCR_TWE | HCR_SWIO | HCR_TIDCP)

/* System Control Register (SCTLR) bits */
#define SCTLR_TE	(1 << 30)
#define SCTLR_EE	(1 << 25)
#define SCTLR_V		(1 << 13)

/* Hyp System Control Register (HSCTLR) bits */
#define HSCTLR_TE	(1 << 30)
#define HSCTLR_EE	(1 << 25)
#define HSCTLR_FI	(1 << 21)
#define HSCTLR_WXN	(1 << 19)
#define HSCTLR_I	(1 << 12)
#define HSCTLR_C	(1 << 2)
#define HSCTLR_A	(1 << 1)
#define HSCTLR_M	1
#define HSCTLR_MASK	(HSCTLR_M | HSCTLR_A | HSCTLR_C | HSCTLR_I | \
			 HSCTLR_WXN | HSCTLR_FI | HSCTLR_EE | HSCTLR_TE)

/* TTBCR and HTCR Registers bits */
#define TTBCR_EAE	(1 << 31)
#define TTBCR_IMP	(1 << 30)
#define TTBCR_SH1	(3 << 28)
#define TTBCR_ORGN1	(3 << 26)
#define TTBCR_IRGN1	(3 << 24)
#define TTBCR_EPD1	(1 << 23)
#define TTBCR_A1	(1 << 22)
#define TTBCR_T1SZ	(7 << 16)
#define TTBCR_SH0	(3 << 12)
#define TTBCR_ORGN0	(3 << 10)
#define TTBCR_IRGN0	(3 << 8)
#define TTBCR_EPD0	(1 << 7)
#define TTBCR_T0SZ	(7 << 0)
#define HTCR_MASK	(TTBCR_T0SZ | TTBCR_IRGN0 | TTBCR_ORGN0 | TTBCR_SH0)

/* Hyp System Trap Register */
#define HSTR_T(x)	(1 << x)
#define HSTR_TTEE	(1 << 16)
#define HSTR_TJDBX	(1 << 17)

/* Hyp Coprocessor Trap Register */
#define HCPTR_TCP(x)	(1 << x)
#define HCPTR_TCP_MASK	(0x3fff)
#define HCPTR_TASE	(1 << 15)
#define HCPTR_TTA	(1 << 20)
#define HCPTR_TCPAC	(1 << 31)

/* Hyp Debug Configuration Register bits */
#define HDCR_TDRA	(1 << 11)
#define HDCR_TDOSA	(1 << 10)
#define HDCR_TDA	(1 << 9)
#define HDCR_TDE	(1 << 8)
#define HDCR_HPME	(1 << 7)
#define HDCR_TPM	(1 << 6)
#define HDCR_TPMCR	(1 << 5)
#define HDCR_HPMN_MASK	(0x1F)

/*
 * The architecture supports 40-bit IPA as input to the 2nd stage translations
 * and PTRS_PER_S2_PGD becomes 1024, because each entry covers 1GB of address
 * space.
 */
#define KVM_PHYS_SHIFT	(40)

#define PTRS_PER_S2_PGD	(_AC(1, ULL) << (KVM_PHYS_SHIFT - 30))

/* Virtualization Translation Control Register (VTCR) bits */
#define VTCR_SH0	(3 << 12)
#define VTCR_ORGN0	(3 << 10)
#define VTCR_IRGN0	(3 << 8)
#define VTCR_SL0	(3 << 6)
#define VTCR_S		(1 << 4)
#define VTCR_T0SZ	(0xf)
#define VTCR_MASK	(VTCR_SH0 | VTCR_ORGN0 | VTCR_IRGN0 | VTCR_SL0 | \
			 VTCR_S | VTCR_T0SZ)
#define VTCR_HTCR_SH	(VTCR_SH0 | VTCR_ORGN0 | VTCR_IRGN0)
#define VTCR_SL_L2	(0 << 6)	/* Starting-level: 2 */
#define VTCR_SL_L1	(1 << 6)	/* Starting-level: 1 */
#define KVM_VTCR_SL0	VTCR_SL_L1
/* stage-2 input address range defined as 2^(32-T0SZ) */
#define KVM_T0SZ	(32 - KVM_PHYS_SHIFT)
#define KVM_VTCR_T0SZ	(KVM_T0SZ & VTCR_T0SZ)
#define KVM_VTCR_S	((KVM_VTCR_T0SZ << 1) & VTCR_S)

/* Virtualization Translation Table Base Register (VTTBR) bits */
#if KVM_VTCR_SL0 == VTCR_SL_L2	/* see ARM DDI 0406C: B4-1720 */
#define VTTBR_X		(14 - KVM_T0SZ)
#else
#define VTTBR_X		(5 - KVM_T0SZ)
#endif
#define VTTBR_CNP_BIT     _AC(1, UL)
#define VTTBR_BADDR_MASK  (((_AC(1, ULL) << (40 - VTTBR_X)) - 1) << VTTBR_X)
#define VTTBR_VMID_SHIFT  _AC(48, ULL)
#define VTTBR_VMID_MASK(size)	(_AT(u64, (1 << size) - 1) << VTTBR_VMID_SHIFT)

/* Hyp Syndrome Register (HSR) bits */
#define HSR_EC_SHIFT	(26)
#define HSR_EC		(_AC(0x3f, UL) << HSR_EC_SHIFT)
#define HSR_IL		(_AC(1, UL) << 25)
#define HSR_ISS		(HSR_IL - 1)
#define HSR_ISV_SHIFT	(24)
#define HSR_ISV		(_AC(1, UL) << HSR_ISV_SHIFT)
#define HSR_SRT_SHIFT	(16)
#define HSR_SRT_MASK	(0xf << HSR_SRT_SHIFT)
#define HSR_FSC		(0x3f)
#define HSR_FSC_TYPE	(0x3c)
#define HSR_SSE		(1 << 21)
#define HSR_WNR		(1 << 6)
#define HSR_CV_SHIFT	(24)
#define HSR_CV		(_AC(1, UL) << HSR_CV_SHIFT)
#define HSR_COND_SHIFT	(20)
#define HSR_COND	(_AC(0xf, UL) << HSR_COND_SHIFT)

#define FSC_FAULT	(0x04)
#define FSC_ACCESS	(0x08)
#define FSC_PERM	(0x0c)
#define FSC_SEA		(0x10)
#define FSC_SEA_TTW0	(0x14)
#define FSC_SEA_TTW1	(0x15)
#define FSC_SEA_TTW2	(0x16)
#define FSC_SEA_TTW3	(0x17)
#define FSC_SECC	(0x18)
#define FSC_SECC_TTW0	(0x1c)
#define FSC_SECC_TTW1	(0x1d)
#define FSC_SECC_TTW2	(0x1e)
#define FSC_SECC_TTW3	(0x1f)

/* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */
#define HPFAR_MASK	(~0xf)

#define HSR_EC_UNKNOWN	(0x00)
#define HSR_EC_WFI	(0x01)
#define HSR_EC_CP15_32	(0x03)
#define HSR_EC_CP15_64	(0x04)
#define HSR_EC_CP14_MR	(0x05)
#define HSR_EC_CP14_LS	(0x06)
#define HSR_EC_CP_0_13	(0x07)
#define HSR_EC_CP10_ID	(0x08)
#define HSR_EC_JAZELLE	(0x09)
#define HSR_EC_BXJ	(0x0A)
#define HSR_EC_CP14_64	(0x0C)
#define HSR_EC_SVC_HYP	(0x11)
#define HSR_EC_HVC	(0x12)
#define HSR_EC_SMC	(0x13)
#define HSR_EC_IABT	(0x20)
#define HSR_EC_IABT_HYP	(0x21)
#define HSR_EC_DABT	(0x24)
#define HSR_EC_DABT_HYP	(0x25)
#define HSR_EC_MAX	(0x3f)

#define HSR_WFI_IS_WFE		(_AC(1, UL) << 0)

#define HSR_HVC_IMM_MASK	((_AC(1, UL) << 16) - 1)

#define HSR_DABT_S1PTW		(_AC(1, UL) << 7)
#define HSR_DABT_CM		(_AC(1, UL) << 8)

#define kvm_arm_exception_type	\
	{0, "RESET" }, 		\
	{1, "UNDEFINED" },	\
	{2, "SOFTWARE" },	\
	{3, "PREF_ABORT" },	\
	{4, "DATA_ABORT" },	\
	{5, "IRQ" },		\
	{6, "FIQ" },		\
	{7, "HVC" }

#define HSRECN(x) { HSR_EC_##x, #x }

#define kvm_arm_exception_class \
	HSRECN(UNKNOWN), HSRECN(WFI), HSRECN(CP15_32), HSRECN(CP15_64), \
	HSRECN(CP14_MR), HSRECN(CP14_LS), HSRECN(CP_0_13), HSRECN(CP10_ID), \
	HSRECN(JAZELLE), HSRECN(BXJ), HSRECN(CP14_64), HSRECN(SVC_HYP), \
	HSRECN(HVC), HSRECN(SMC), HSRECN(IABT), HSRECN(IABT_HYP), \
	HSRECN(DABT), HSRECN(DABT_HYP)


#endif /* __ARM_KVM_ARM_H__ */

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