Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/ptp/ptp_kvm_arm.c b/drivers/ptp/ptp_kvm_arm.c
new file mode 100644
index 0000000000..e68e694316
--- /dev/null
+++ b/drivers/ptp/ptp_kvm_arm.c
@@ -0,0 +1,32 @@
+// 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);
+}