| 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, tspec: ts, NULL); |
| 32 | } |
| 33 |