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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Virtual PTP 1588 clock for use with KVM guests4 * Copyright (C) 2019 ARM Ltd.5 * All Rights Reserved6 */7 8#include <linux/arm-smccc.h>9#include <linux/ptp_kvm.h>10 11#include <asm/arch_timer.h>12#include <asm/hypervisor.h>13 14int kvm_arch_ptp_init(void)15{16 int ret;17 18 ret = kvm_arm_hyp_service_available(ARM_SMCCC_KVM_FUNC_PTP);19 if (ret <= 0)20 return -EOPNOTSUPP;21 22 return 0;23}24 25void kvm_arch_ptp_exit(void)26{27}28 29int kvm_arch_ptp_get_clock(struct timespec64 *ts)30{31 return kvm_arch_ptp_get_crosststamp(NULL, ts, NULL);32}33