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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2021 ARM Ltd.
*/
#ifndef __ASM_KVM_MTE_H
#define __ASM_KVM_MTE_H
#ifdef __ASSEMBLY__
#include <asm/sysreg.h>
#ifdef CONFIG_ARM64_MTE
.macro mte_switch_to_guest g_ctxt, h_ctxt, reg1
alternative_if_not ARM64_MTE
b .L__skip_switch\@
alternative_else_nop_endif
mrs \reg1, hcr_el2
tbz \reg1, #(HCR_ATA_SHIFT), .L__skip_switch\@
mrs_s \reg1, SYS_RGSR_EL1
str \reg1, [\h_ctxt, #CPU_RGSR_EL1]
mrs_s \reg1, SYS_GCR_EL1
str \reg1, [\h_ctxt, #CPU_GCR_EL1]
ldr \reg1, [\g_ctxt, #CPU_RGSR_EL1]
msr_s SYS_RGSR_EL1, \reg1
ldr \reg1, [\g_ctxt, #CPU_GCR_EL1]
msr_s SYS_GCR_EL1, \reg1
.L__skip_switch\@:
.endm
.macro mte_switch_to_hyp g_ctxt, h_ctxt, reg1
alternative_if_not ARM64_MTE
b .L__skip_switch\@
alternative_else_nop_endif
mrs \reg1, hcr_el2
tbz \reg1, #(HCR_ATA_SHIFT), .L__skip_switch\@
mrs_s \reg1, SYS_RGSR_EL1
str \reg1, [\g_ctxt, #CPU_RGSR_EL1]
mrs_s \reg1, SYS_GCR_EL1
str \reg1, [\g_ctxt, #CPU_GCR_EL1]
ldr \reg1, [\h_ctxt, #CPU_RGSR_EL1]
msr_s SYS_RGSR_EL1, \reg1
ldr \reg1, [\h_ctxt, #CPU_GCR_EL1]
msr_s SYS_GCR_EL1, \reg1
isb
.L__skip_switch\@:
.endm
#else /* !CONFIG_ARM64_MTE */
.macro mte_switch_to_guest g_ctxt, h_ctxt, reg1
.endm
.macro mte_switch_to_hyp g_ctxt, h_ctxt, reg1
.endm
#endif /* CONFIG_ARM64_MTE */
#endif /* __ASSEMBLY__ */
#endif /* __ASM_KVM_MTE_H */
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