Cregit: Linux 6.7: ptp_kvm

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Jianyong Wu	58	81.69%	1	20.00%
Jeremi Piotrowski	7	9.86%	1	20.00%
Marc Zyngier	5	7.04%	2	40.00%
Thomas Gleixner	1	1.41%	1	20.00%
Total	71		5

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Virtual PTP 1588 clock for use with KVM guests
 *  Copyright (C) 2019 ARM Ltd.
 *  All Rights Reserved
 */

#include <linux/arm-smccc.h>
#include <linux/ptp_kvm.h>

#include <asm/arch_timer.h>
#include <asm/hypervisor.h>

int kvm_arch_ptp_init(void)
{
	int ret;

	ret = kvm_arm_hyp_service_available(ARM_SMCCC_KVM_FUNC_PTP);
	if (ret <= 0)
		return -EOPNOTSUPP;

	return 0;
}

void kvm_arch_ptp_exit(void)
{
}

int kvm_arch_ptp_get_clock(struct timespec64 *ts)
{
	return kvm_arch_ptp_get_crosststamp(NULL, ts, NULL);
}

ptp_kvm_arm.c