1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Virtual PTP 1588 clock for use with KVM guests 4 * Copyright (C) 2019 ARM Ltd. 5 * All Rights Reserved 6 */ 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 14 int 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 25 void kvm_arch_ptp_exit(void) 26 { 27 } 28 29 int kvm_arch_ptp_get_clock(struct timespec64 *ts) 30 { 31 return kvm_arch_ptp_get_crosststamp(NULL, ts, NULL); 32 } 33