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/ proc / self / root / lib / modules / 6.8.0-60-generic / build / arch / arm64 / kvm / hyp / include / hyp /

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adjust_pc.h

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Guest PC manipulation helpers
 *
 * Copyright (C) 2012,2013 - ARM Ltd
 * Copyright (C) 2020 - Google LLC
 * Author: Marc Zyngier <maz@kernel.org>
 */

#ifndef __ARM64_KVM_HYP_ADJUST_PC_H__
#define __ARM64_KVM_HYP_ADJUST_PC_H__

#include <asm/kvm_emulate.h>
#include <asm/kvm_host.h>

static inline void kvm_skip_instr(struct kvm_vcpu *vcpu)
{
	if (vcpu_mode_is_32bit(vcpu)) {
		kvm_skip_instr32(vcpu);
	} else {
		*vcpu_pc(vcpu) += 4;
		*vcpu_cpsr(vcpu) &= ~PSR_BTYPE_MASK;
	}

/* advance the singlestep state machine */
	*vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS;
}

/*
 * Skip an instruction which has been emulated at hyp while most guest sysregs
 * are live.
 */
static inline void __kvm_skip_instr(struct kvm_vcpu *vcpu)
{
	*vcpu_pc(vcpu) = read_sysreg_el2(SYS_ELR);
	vcpu_gp_regs(vcpu)->pstate = read_sysreg_el2(SYS_SPSR);

kvm_skip_instr(vcpu);

write_sysreg_el2(vcpu_gp_regs(vcpu)->pstate, SYS_SPSR);
	write_sysreg_el2(*vcpu_pc(vcpu), SYS_ELR);
}

/*
 * Skip an instruction while host sysregs are live.
 * Assumes host is always 64-bit.
 */
static inline void kvm_skip_host_instr(void)
{
	write_sysreg_el2(read_sysreg_el2(SYS_ELR) + 4, SYS_ELR);
}

#endif

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2025-05-16 06:28:30
..	dir	-	root/root	drwxr-xr-x	2025-05-16 06:28:27
adjust_pc.h	text/x-c	1.18 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
debug-sr.h	text/x-c	4.71 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
fault.h	text/x-c	1.96 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
switch.h	text/x-c	20.11 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
sysreg-sr.h	text/x-c	8.39 KB	root/root	-rw-r--r--	2024-03-11 02:08:09

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