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b2c67cbe9f
System time snapshots are not conveying information about the current clocksource which was used, but callers like the PTP KVM guest implementation have the requirement to evaluate the clocksource type to select the appropriate mechanism. Introduce a clocksource id field in struct clocksource which is by default set to CSID_GENERIC (0). Clocksource implementations can set that field to a value which allows to identify the clocksource. Store the clocksource id of the current clocksource in the system_time_snapshot so callers can evaluate which clocksource was used to take the snapshot and act accordingly. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jianyong Wu <jianyong.wu@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20201209060932.212364-5-jianyong.wu@arm.com
11 lines
223 B
C
11 lines
223 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_CLOCKSOURCE_IDS_H
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#define _LINUX_CLOCKSOURCE_IDS_H
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/* Enum to give clocksources a unique identifier */
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enum clocksource_ids {
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CSID_GENERIC = 0,
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CSID_MAX,
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};
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#endif
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