tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
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
25int kvm_arch_ptp_get_clock(struct timespec64 *ts)
26{
27 return kvm_arch_ptp_get_crosststamp(NULL, ts, NULL);
28}