arch/arm64/kvm/hyp/nvhe/sysreg-sr.c

Source file repositories/reference/linux-study-clean/arch/arm64/kvm/hyp/nvhe/sysreg-sr.c

File Facts

System
Linux kernel
Corpus path
arch/arm64/kvm/hyp/nvhe/sysreg-sr.c
Extension
.c
Size
878 bytes
Lines
38
Domain
Architecture Layer
Bucket
arch/arm64
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012-2015 - ARM Ltd
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 */

#include <hyp/sysreg-sr.h>

#include <linux/compiler.h>
#include <linux/kvm_host.h>

#include <asm/kprobes.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_emulate.h>
#include <asm/kvm_hyp.h>

/*
 * Non-VHE: Both host and guest must save everything.
 */

void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt)
{
	__sysreg_save_el1_state(ctxt);
	__sysreg_save_common_state(ctxt);
	__sysreg_save_user_state(ctxt);
	__sysreg_save_el2_return_state(ctxt);
}

void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt)
{
	u64 midr = ctxt_midr_el1(ctxt);

	__sysreg_restore_el1_state(ctxt, midr, ctxt_sys_reg(ctxt, MPIDR_EL1));
	__sysreg_restore_common_state(ctxt);
	__sysreg_restore_user_state(ctxt);
	__sysreg_restore_el2_return_state(ctxt);
}

Annotation

Implementation Notes