ARK-OS/arkos/kernel/arch/arm64/include/asm/el2_setup.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2012,2013 - ARM Ltd
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 */

#ifndef __ARM_KVM_INIT_H__
#define __ARM_KVM_INIT_H__

#ifndef __ASSEMBLER__
#error Assembly-only header
#endif

#include <asm/kvm_arm.h>
#include <asm/ptrace.h>
#include <asm/sysreg.h>
#include <linux/irqchip/arm-gic-v3.h>

.macro init_el2_hcr	val
	mov_q	x0, \val

	/*
	 * Compliant CPUs advertise their VHE-onlyness with
	 * ID_AA64MMFR4_EL1.E2H0 < 0. On such CPUs HCR_EL2.E2H is RES1, but it
	 * can reset into an UNKNOWN state and might not read as 1 until it has
	 * been initialized explicitly.
	 * Initialize HCR_EL2.E2H so that later code can rely upon HCR_EL2.E2H
	 * indicating whether the CPU is running in E2H mode.
	 */
	mrs_s	x1, SYS_ID_AA64MMFR4_EL1
	sbfx	x1, x1, #ID_AA64MMFR4_EL1_E2H0_SHIFT, #ID_AA64MMFR4_EL1_E2H0_WIDTH
	cmp	x1, #0
	b.lt	.LnE2H0_\@

	/*
	 * Unfortunately, HCR_EL2.E2H can be RES1 even if not advertised
	 * as such via ID_AA64MMFR4_EL1.E2H0:
	 *
	 * - Fruity CPUs predate the !FEAT_E2H0 relaxation, and seem to
	 *   have HCR_EL2.E2H implemented as RAO/WI.
	 *
	 * - On CPUs that lack FEAT_FGT, a hypervisor can't trap guest
	 *   reads of ID_AA64MMFR4_EL1 to advertise !FEAT_E2H0. NV
	 *   guests on these hosts can write to HCR_EL2.E2H without
	 *   trapping to the hypervisor, but these writes have no
	 *   functional effect.
	 *
	 * Handle both cases by checking for an essential VHE property
	 * (system register remapping) to decide whether we're
	 * effectively VHE-only or not.
	 */
	msr_hcr_el2 x0		// Setup HCR_EL2 as nVHE
	isb
	mov	x1, #1		// Write something to FAR_EL1
	msr	far_el1, x1
	isb
	mov	x1, #2		// Try to overwrite it via FAR_EL2
	msr	far_el2, x1
	isb
	mrs	x1, far_el1	// If we see the latest write in FAR_EL1,
	cmp	x1, #2		// we can safely assume we are VHE only.
	b.ne	.LnVHE_\@	// Otherwise, we know that nVHE works.

.LnE2H0_\@:
	orr	x0, x0, #HCR_E2H
	msr_hcr_el2 x0
	isb
.LnVHE_\@:
.endm

.macro __init_el2_sctlr
	mov_q	x0, INIT_SCTLR_EL2_MMU_OFF
	msr	sctlr_el2, x0
	isb
.endm

.macro __init_el2_hcrx
	mrs	x0, id_aa64mmfr1_el1
	ubfx	x0, x0, #ID_AA64MMFR1_EL1_HCX_SHIFT, #4
	cbz	x0, .Lskip_hcrx_\@
	mov_q	x0, (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En | HCRX_EL2_EnFPM)

        /* Enable GCS if supported */
	mrs_s	x1, SYS_ID_AA64PFR1_EL1
	ubfx	x1, x1, #ID_AA64PFR1_EL1_GCS_SHIFT, #4
	cbz	x1, .Lskip_gcs_hcrx_\@
	orr	x0, x0, #HCRX_EL2_GCSEn

.Lskip_gcs_hcrx_\@:
	/* Enable LS64, LS64_V if supported */
	mrs_s	x1, SYS_ID_AA64ISAR1_EL1
	ubfx	x1, x1, #ID_AA64ISAR1_EL1_LS64_SHIFT, #4
	cbz	x1, .Lset_hcrx_\@
	orr	x0, x0, #HCRX_EL2_EnALS
	cmp	x1, #ID_AA64ISAR1_EL1_LS64_LS64_V
	b.lt	.Lset_hcrx_\@
	orr	x0, x0, #HCRX_EL2_EnASR

.Lset_hcrx_\@:
	msr_s	SYS_HCRX_EL2, x0
.Lskip_hcrx_\@:
.endm

/* Check if running in host at EL2 mode, i.e., (h)VHE. Jump to fail if not. */
.macro __check_hvhe fail, tmp
	mrs	\tmp, hcr_el2
	and	\tmp, \tmp, #HCR_E2H
	cbz	\tmp, \fail
.endm

/*
 * Allow Non-secure EL1 and EL0 to access physical timer and counter.
 * This is not necessary for VHE, since the host kernel runs in EL2,
 * and EL0 accesses are configured in the later stage of boot process.
 * Note that when HCR_EL2.E2H == 1, CNTHCTL_EL2 has the same bit layout
 * as CNTKCTL_EL1, and CNTKCTL_EL1 accessing instructions are redefined
 * to access CNTHCTL_EL2. This allows the kernel designed to run at EL1
 * to transparently mess with the EL0 bits via CNTKCTL_EL1 access in
 * EL2.
 */
.macro __init_el2_timers
	mov	x0, #3				// Enable EL1 physical timers
	__check_hvhe .LnVHE_\@, x1
	lsl	x0, x0, #10
.LnVHE_\@:
	msr	cnthctl_el2, x0
	msr	cntvoff_el2, xzr		// Clear virtual offset
.endm

/* Branch to skip_label if SPE version is less than given version */
.macro __spe_vers_imp skip_label, version, tmp
    mrs    \tmp, id_aa64dfr0_el1
    ubfx   \tmp, \tmp, #ID_AA64DFR0_EL1_PMSVer_SHIFT, #4
    cmp    \tmp, \version
    b.lt   \skip_label
.endm

.macro __init_el2_debug
	mrs	x1, id_aa64dfr0_el1
	ubfx	x0, x1, #ID_AA64DFR0_EL1_PMUVer_SHIFT, #4
	cmp	x0, #ID_AA64DFR0_EL1_PMUVer_NI
	ccmp	x0, #ID_AA64DFR0_EL1_PMUVer_IMP_DEF, #4, ne
	b.eq	.Lskip_pmu_\@			// Skip if no PMU present or IMP_DEF
	mrs	x0, pmcr_el0			// Disable debug access traps
	ubfx	x0, x0, #11, #5			// to EL2 and allow access to
.Lskip_pmu_\@:
	csel	x2, xzr, x0, eq			// all PMU counters from EL1

	/* Statistical profiling */
	__spe_vers_imp .Lskip_spe_\@, ID_AA64DFR0_EL1_PMSVer_IMP, x0 // Skip if SPE not present

	mrs_s	x0, SYS_PMBIDR_EL1              // If SPE available at EL2,
	and	x0, x0, #(1 << PMBIDR_EL1_P_SHIFT)
	cbnz	x0, .Lskip_spe_el2_\@		// then permit sampling of physical
	mov	x0, #(1 << PMSCR_EL2_PCT_SHIFT | \
		      1 << PMSCR_EL2_PA_SHIFT)
	msr_s	SYS_PMSCR_EL2, x0		// addresses and physical counter
.Lskip_spe_el2_\@:
	mov	x0, #MDCR_EL2_E2PB_MASK
	orr	x2, x2, x0			// If we don't have VHE, then
						// use EL1&0 translation.

.Lskip_spe_\@:
	/* Trace buffer */
	ubfx	x0, x1, #ID_AA64DFR0_EL1_TraceBuffer_SHIFT, #4
	cbz	x0, .Lskip_trace_\@		// Skip if TraceBuffer is not present

	mrs_s	x0, SYS_TRBIDR_EL1
	and	x0, x0, TRBIDR_EL1_P
	cbnz	x0, .Lskip_trace_\@		// If TRBE is available at EL2

	mov	x0, #MDCR_EL2_E2TB_MASK
	orr	x2, x2, x0			// allow the EL1&0 translation
						// to own it.

.Lskip_trace_\@:
	msr	mdcr_el2, x2			// Configure debug traps
.endm

/* LORegions */
.macro __init_el2_lor
	mrs	x1, id_aa64mmfr1_el1
	ubfx	x0, x1, #ID_AA64MMFR1_EL1_LO_SHIFT, 4
	cbz	x0, .Lskip_lor_\@
	msr_s	SYS_LORC_EL1, xzr
.Lskip_lor_\@:
.endm

/* Stage-2 translation */
.macro __init_el2_stage2
	msr	vttbr_el2, xzr
.endm

/* GICv3 system register access */
.macro __init_el2_gicv3
	mrs	x0, id_aa64pfr0_el1
	ubfx	x0, x0, #ID_AA64PFR0_EL1_GIC_SHIFT, #4
	cbz	x0, .Lskip_gicv3_\@

	mrs_s	x0, SYS_ICC_SRE_EL2
	orr	x0, x0, #ICC_SRE_EL2_SRE	// Set ICC_SRE_EL2.SRE==1
	orr	x0, x0, #ICC_SRE_EL2_ENABLE	// Set ICC_SRE_EL2.Enable==1
	msr_s	SYS_ICC_SRE_EL2, x0
	isb					// Make sure SRE is now set
	mrs_s	x0, SYS_ICC_SRE_EL2		// Read SRE back,
	tbz	x0, #0, .Lskip_gicv3_\@		// and check that it sticks
	msr_s	SYS_ICH_HCR_EL2, xzr		// Reset ICH_HCR_EL2 to defaults
.Lskip_gicv3_\@:
.endm

/* GICv5 system register access */
.macro __init_el2_gicv5
	mrs_s	x0, SYS_ID_AA64PFR2_EL1
	ubfx	x0, x0, #ID_AA64PFR2_EL1_GCIE_SHIFT, #4
	cbz	x0, .Lskip_gicv5_\@

	mov	x0, #(ICH_HFGITR_EL2_GICRCDNMIA		| \
		      ICH_HFGITR_EL2_GICRCDIA		| \
		      ICH_HFGITR_EL2_GICCDDI		| \
		      ICH_HFGITR_EL2_GICCDEOI		| \
		      ICH_HFGITR_EL2_GICCDHM		| \
		      ICH_HFGITR_EL2_GICCDRCFG		| \
		      ICH_HFGITR_EL2_GICCDPEND		| \
		      ICH_HFGITR_EL2_GICCDAFF		| \
		      ICH_HFGITR_EL2_GICCDPRI		| \
		      ICH_HFGITR_EL2_GICCDDIS		| \
		      ICH_HFGITR_EL2_GICCDEN)
	msr_s	SYS_ICH_HFGITR_EL2, x0		// Disable instruction traps
	mov_q	x0, (ICH_HFGRTR_EL2_ICC_PPI_ACTIVERn_EL1	| \
		     ICH_HFGRTR_EL2_ICC_PPI_PRIORITYRn_EL1	| \
		     ICH_HFGRTR_EL2_ICC_PPI_PENDRn_EL1		| \
		     ICH_HFGRTR_EL2_ICC_PPI_ENABLERn_EL1	| \
		     ICH_HFGRTR_EL2_ICC_PPI_HMRn_EL1		| \
		     ICH_HFGRTR_EL2_ICC_IAFFIDR_EL1		| \
		     ICH_HFGRTR_EL2_ICC_ICSR_EL1		| \
		     ICH_HFGRTR_EL2_ICC_PCR_EL1			| \
		     ICH_HFGRTR_EL2_ICC_HPPIR_EL1		| \
		     ICH_HFGRTR_EL2_ICC_CR0_EL1			| \
		     ICH_HFGRTR_EL2_ICC_IDRn_EL1		| \
		     ICH_HFGRTR_EL2_ICC_APR_EL1)
	msr_s	SYS_ICH_HFGRTR_EL2, x0		// Disable reg read traps
	mov_q	x0, (ICH_HFGWTR_EL2_ICC_PPI_ACTIVERn_EL1	| \
		     ICH_HFGWTR_EL2_ICC_PPI_PRIORITYRn_EL1	| \
		     ICH_HFGWTR_EL2_ICC_PPI_PENDRn_EL1		| \
		     ICH_HFGWTR_EL2_ICC_PPI_ENABLERn_EL1	| \
		     ICH_HFGWTR_EL2_ICC_ICSR_EL1		| \
		     ICH_HFGWTR_EL2_ICC_PCR_EL1			| \
		     ICH_HFGWTR_EL2_ICC_CR0_EL1			| \
		     ICH_HFGWTR_EL2_ICC_APR_EL1)
	msr_s	SYS_ICH_HFGWTR_EL2, x0		// Disable reg write traps
.Lskip_gicv5_\@:
.endm

.macro __init_el2_hstr
	msr	hstr_el2, xzr			// Disable CP15 traps to EL2
.endm

/* Virtual CPU ID registers */
.macro __init_el2_nvhe_idregs
	mrs	x0, midr_el1
	mrs	x1, mpidr_el1
	msr	vpidr_el2, x0
	msr	vmpidr_el2, x1
.endm

/* Coprocessor traps */
.macro __init_el2_cptr
	__check_hvhe .LnVHE_\@, x1
	mov	x0, #CPACR_EL1_FPEN
	msr	cpacr_el1, x0
	b	.Lskip_set_cptr_\@
.LnVHE_\@:
	mov	x0, #0x33ff
	msr	cptr_el2, x0			// Disable copro. traps to EL2
.Lskip_set_cptr_\@:
.endm

/*
 * Configure BRBE to permit recording cycle counts and branch mispredicts.
 *
 * At any EL, to record cycle counts BRBE requires that both BRBCR_EL2.CC=1 and
 * BRBCR_EL1.CC=1.
 *
 * At any EL, to record branch mispredicts BRBE requires that both
 * BRBCR_EL2.MPRED=1 and BRBCR_EL1.MPRED=1.
 *
 * Set {CC,MPRED} in BRBCR_EL2 in case nVHE mode is used and we are
 * executing in EL1.
 */
.macro __init_el2_brbe
	mrs	x1, id_aa64dfr0_el1
	ubfx	x1, x1, #ID_AA64DFR0_EL1_BRBE_SHIFT, #4
	cbz	x1, .Lskip_brbe_\@

	mov_q	x0, BRBCR_ELx_CC | BRBCR_ELx_MPRED
	msr_s	SYS_BRBCR_EL2, x0
.Lskip_brbe_\@:
.endm

/* Disable any fine grained traps */
.macro __init_el2_fgt
	mrs	x1, id_aa64mmfr0_el1
	ubfx	x1, x1, #ID_AA64MMFR0_EL1_FGT_SHIFT, #4
	cbz	x1, .Lskip_fgt_\@

	mov	x0, xzr
	mov	x2, xzr
	/* If SPEv1p2 is implemented, */
	__spe_vers_imp .Lskip_spe_fgt_\@, #ID_AA64DFR0_EL1_PMSVer_V1P2, x1
	/* Disable PMSNEVFR_EL1 read and write traps */
	orr	x0, x0, #HDFGRTR_EL2_nPMSNEVFR_EL1_MASK
	orr	x2, x2, #HDFGWTR_EL2_nPMSNEVFR_EL1_MASK

.Lskip_spe_fgt_\@:
	mrs	x1, id_aa64dfr0_el1
	ubfx	x1, x1, #ID_AA64DFR0_EL1_BRBE_SHIFT, #4
	cbz	x1, .Lskip_brbe_fgt_\@

	/*
	 * Disable read traps for the following registers
	 *
	 * [BRBSRC|BRBTGT|RBINF]_EL1
	 * [BRBSRCINJ|BRBTGTINJ|BRBINFINJ|BRBTS]_EL1
	 */
	orr	x0, x0, #HDFGRTR_EL2_nBRBDATA_MASK

	/*
	 * Disable write traps for the following registers
	 *
	 * [BRBSRCINJ|BRBTGTINJ|BRBINFINJ|BRBTS]_EL1
	 */
	orr	x2, x2, #HDFGWTR_EL2_nBRBDATA_MASK

	/* Disable read and write traps for [BRBCR|BRBFCR]_EL1 */
	orr	x0, x0, #HDFGRTR_EL2_nBRBCTL_MASK
	orr	x2, x2, #HDFGWTR_EL2_nBRBCTL_MASK

	/* Disable read traps for BRBIDR_EL1 */
	orr	x0, x0, #HDFGRTR_EL2_nBRBIDR_MASK

.Lskip_brbe_fgt_\@:

.Lset_debug_fgt_\@:
	msr_s	SYS_HDFGRTR_EL2, x0
	msr_s	SYS_HDFGWTR_EL2, x2

	mov	x0, xzr
	mov	x2, xzr

	mrs	x1, id_aa64dfr0_el1
	ubfx	x1, x1, #ID_AA64DFR0_EL1_BRBE_SHIFT, #4
	cbz	x1, .Lskip_brbe_insn_fgt_\@

	/* Disable traps for BRBIALL instruction */
	orr	x2, x2, #HFGITR_EL2_nBRBIALL_MASK

	/* Disable traps for BRBINJ instruction */
	orr	x2, x2, #HFGITR_EL2_nBRBINJ_MASK

.Lskip_brbe_insn_fgt_\@:
	mrs	x1, id_aa64pfr1_el1
	ubfx	x1, x1, #ID_AA64PFR1_EL1_SME_SHIFT, #4
	cbz	x1, .Lskip_sme_fgt_\@

	/* Disable nVHE traps of TPIDR2 and SMPRI */
	orr	x0, x0, #HFGRTR_EL2_nSMPRI_EL1_MASK
	orr	x0, x0, #HFGRTR_EL2_nTPIDR2_EL0_MASK

.Lskip_sme_fgt_\@:
	mrs_s	x1, SYS_ID_AA64MMFR3_EL1
	ubfx	x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4
	cbz	x1, .Lskip_pie_fgt_\@

	/* Disable trapping of PIR_EL1 / PIRE0_EL1 */
	orr	x0, x0, #HFGRTR_EL2_nPIR_EL1
	orr	x0, x0, #HFGRTR_EL2_nPIRE0_EL1

.Lskip_pie_fgt_\@:
	mrs_s	x1, SYS_ID_AA64MMFR3_EL1
	ubfx	x1, x1, #ID_AA64MMFR3_EL1_S1POE_SHIFT, #4
	cbz	x1, .Lskip_poe_fgt_\@

	/* Disable trapping of POR_EL0 */
	orr	x0, x0, #HFGRTR_EL2_nPOR_EL0

.Lskip_poe_fgt_\@:
	/* GCS depends on PIE so we don't check it if PIE is absent */
	mrs_s	x1, SYS_ID_AA64PFR1_EL1
	ubfx	x1, x1, #ID_AA64PFR1_EL1_GCS_SHIFT, #4
	cbz	x1, .Lskip_gce_fgt_\@

	/* Disable traps of access to GCS registers at EL0 and EL1 */
	orr	x0, x0, #HFGRTR_EL2_nGCS_EL1_MASK
	orr	x0, x0, #HFGRTR_EL2_nGCS_EL0_MASK

.Lskip_gce_fgt_\@:

.Lset_fgt_\@:
	msr_s	SYS_HFGRTR_EL2, x0
	msr_s	SYS_HFGWTR_EL2, x0
	msr_s	SYS_HFGITR_EL2, x2

	mrs	x1, id_aa64pfr0_el1		// AMU traps UNDEF without AMU
	ubfx	x1, x1, #ID_AA64PFR0_EL1_AMU_SHIFT, #4
	cbz	x1, .Lskip_amu_fgt_\@

	msr_s	SYS_HAFGRTR_EL2, xzr

.Lskip_amu_fgt_\@:

.Lskip_fgt_\@:
.endm

.macro __init_el2_fgt2
	mrs	x1, id_aa64mmfr0_el1
	ubfx	x1, x1, #ID_AA64MMFR0_EL1_FGT_SHIFT, #4
	cmp	x1, #ID_AA64MMFR0_EL1_FGT_FGT2
	b.lt	.Lskip_fgt2_\@

	mov	x0, xzr
	mrs	x1, id_aa64dfr0_el1
	ubfx	x1, x1, #ID_AA64DFR0_EL1_PMUVer_SHIFT, #4
	cmp	x1, #ID_AA64DFR0_EL1_PMUVer_V3P9
	b.lt	.Lskip_pmuv3p9_\@

	orr	x0, x0, #HDFGRTR2_EL2_nPMICNTR_EL0
	orr	x0, x0, #HDFGRTR2_EL2_nPMICFILTR_EL0
	orr	x0, x0, #HDFGRTR2_EL2_nPMUACR_EL1
.Lskip_pmuv3p9_\@:
	/* If SPE is implemented, */
	__spe_vers_imp .Lskip_spefds_\@, ID_AA64DFR0_EL1_PMSVer_IMP, x1
	/* we can read PMSIDR and */
	mrs_s	x1, SYS_PMSIDR_EL1
	and	x1, x1,  #PMSIDR_EL1_FDS
	/* if FEAT_SPE_FDS is implemented, */
	cbz	x1, .Lskip_spefds_\@
	/* disable traps of PMSDSFR to EL2. */
	orr	x0, x0, #HDFGRTR2_EL2_nPMSDSFR_EL1

.Lskip_spefds_\@:
	msr_s   SYS_HDFGRTR2_EL2, x0
	msr_s   SYS_HDFGWTR2_EL2, x0
	msr_s   SYS_HFGRTR2_EL2, xzr
	msr_s   SYS_HFGWTR2_EL2, xzr
	msr_s   SYS_HFGITR2_EL2, xzr
.Lskip_fgt2_\@:
.endm

/**
 * Initialize EL2 registers to sane values. This should be called early on all
 * cores that were booted in EL2. Note that everything gets initialised as
 * if VHE was not available. The kernel context will be upgraded to VHE
 * if possible later on in the boot process
 *
 * Regs: x0, x1 and x2 are clobbered.
 */
.macro init_el2_state
	__init_el2_sctlr
	__init_el2_hcrx
	__init_el2_timers
	__init_el2_debug
	__init_el2_brbe
	__init_el2_lor
	__init_el2_stage2
	__init_el2_gicv3
	__init_el2_gicv5
	__init_el2_hstr
	__init_el2_nvhe_idregs
	__init_el2_cptr
	__init_el2_fgt
	__init_el2_fgt2
.endm

#ifndef __KVM_NVHE_HYPERVISOR__
// This will clobber tmp1 and tmp2, and expect tmp1 to contain
// the id register value as read from the HW
.macro __check_override idreg, fld, width, pass, fail, tmp1, tmp2
	ubfx	\tmp1, \tmp1, #\fld, #\width
	cbz	\tmp1, \fail

	adr_l	\tmp1, \idreg\()_override
	ldr	\tmp2, [\tmp1, FTR_OVR_VAL_OFFSET]
	ldr	\tmp1, [\tmp1, FTR_OVR_MASK_OFFSET]
	ubfx	\tmp2, \tmp2, #\fld, #\width
	ubfx	\tmp1, \tmp1, #\fld, #\width
	cmp	\tmp1, xzr
	and	\tmp2, \tmp2, \tmp1
	csinv	\tmp2, \tmp2, xzr, ne
	cbnz	\tmp2, \pass
	b	\fail
.endm

// This will clobber tmp1 and tmp2
.macro check_override idreg, fld, pass, fail, tmp1, tmp2
	mrs	\tmp1, \idreg\()_el1
	__check_override \idreg \fld 4 \pass \fail \tmp1 \tmp2
.endm
#else
// This will clobber tmp
.macro __check_override idreg, fld, width, pass, fail, tmp, ignore
	ldr_l	\tmp, \idreg\()_el1_sys_val
	ubfx	\tmp, \tmp, #\fld, #\width
	cbnz	\tmp, \pass
	b	\fail
.endm

.macro check_override idreg, fld, pass, fail, tmp, ignore
	__check_override \idreg \fld 4 \pass \fail \tmp \ignore
.endm
#endif

.macro finalise_el2_state
	check_override id_aa64pfr0, ID_AA64PFR0_EL1_MPAM_SHIFT, .Linit_mpam_\@, .Lskip_mpam_\@, x1, x2

.Linit_mpam_\@:
	msr_s	SYS_MPAM2_EL2, xzr		// use the default partition
						// and disable lower traps
	mrs_s	x0, SYS_MPAMIDR_EL1
	tbz	x0, #MPAMIDR_EL1_HAS_HCR_SHIFT, .Lskip_mpam_\@  // skip if no MPAMHCR reg
	msr_s   SYS_MPAMHCR_EL2, xzr		// clear TRAP_MPAMIDR_EL1 -> EL2

.Lskip_mpam_\@:
	check_override id_aa64pfr1, ID_AA64PFR1_EL1_GCS_SHIFT, .Linit_gcs_\@, .Lskip_gcs_\@, x1, x2

.Linit_gcs_\@:
	msr_s	SYS_GCSCR_EL1, xzr
	msr_s	SYS_GCSCRE0_EL1, xzr

.Lskip_gcs_\@:
	check_override id_aa64pfr0, ID_AA64PFR0_EL1_SVE_SHIFT, .Linit_sve_\@, .Lskip_sve_\@, x1, x2

.Linit_sve_\@:	/* SVE register access */
	__check_hvhe .Lcptr_nvhe_\@, x1

	// (h)VHE case
	mrs	x0, cpacr_el1			// Disable SVE traps
	orr	x0, x0, #CPACR_EL1_ZEN
	msr	cpacr_el1, x0
	b	.Lskip_set_cptr_\@

.Lcptr_nvhe_\@: // nVHE case
	mrs	x0, cptr_el2			// Disable SVE traps
	bic	x0, x0, #CPTR_EL2_TZ
	msr	cptr_el2, x0
.Lskip_set_cptr_\@:
	isb
	mov	x1, #ZCR_ELx_LEN_MASK		// SVE: Enable full vector
	msr_s	SYS_ZCR_EL2, x1			// length for EL1.

.Lskip_sve_\@:
	check_override id_aa64pfr1, ID_AA64PFR1_EL1_SME_SHIFT, .Linit_sme_\@, .Lskip_sme_\@, x1, x2

.Linit_sme_\@:	/* SME register access and priority mapping */
	__check_hvhe .Lcptr_nvhe_sme_\@, x1

	// (h)VHE case
	mrs	x0, cpacr_el1			// Disable SME traps
	orr	x0, x0, #CPACR_EL1_SMEN
	msr	cpacr_el1, x0
	b	.Lskip_set_cptr_sme_\@

.Lcptr_nvhe_sme_\@: // nVHE case
	mrs	x0, cptr_el2			// Disable SME traps
	bic	x0, x0, #CPTR_EL2_TSM
	msr	cptr_el2, x0
.Lskip_set_cptr_sme_\@:
	isb

	mrs	x1, sctlr_el2
	orr	x1, x1, #SCTLR_ELx_ENTP2	// Disable TPIDR2 traps
	msr	sctlr_el2, x1
	isb

	mov	x0, #0				// SMCR controls

	// Full FP in SM?
	mrs_s	x1, SYS_ID_AA64SMFR0_EL1
	__check_override id_aa64smfr0, ID_AA64SMFR0_EL1_FA64_SHIFT, 1, .Linit_sme_fa64_\@, .Lskip_sme_fa64_\@, x1, x2

.Linit_sme_fa64_\@:
	orr	x0, x0, SMCR_ELx_FA64_MASK
.Lskip_sme_fa64_\@:

	// ZT0 available?
	mrs_s	x1, SYS_ID_AA64SMFR0_EL1
	__check_override id_aa64smfr0, ID_AA64SMFR0_EL1_SMEver_SHIFT, 4, .Linit_sme_zt0_\@, .Lskip_sme_zt0_\@, x1, x2
.Linit_sme_zt0_\@:
	orr	x0, x0, SMCR_ELx_EZT0_MASK
.Lskip_sme_zt0_\@:

	orr	x0, x0, #SMCR_ELx_LEN_MASK	// Enable full SME vector
	msr_s	SYS_SMCR_EL2, x0		// length for EL1.

	mrs_s	x1, SYS_SMIDR_EL1		// Priority mapping supported?
	ubfx    x1, x1, #SMIDR_EL1_SMPS_SHIFT, #1
	cbz     x1, .Lskip_sme_\@

	msr_s	SYS_SMPRIMAP_EL2, xzr		// Make all priorities equal
.Lskip_sme_\@:
.endm

#endif /* __ARM_KVM_INIT_H__ */