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um: expose time-travel mode to userspace side

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This will be necessary in the userspace side to fix the
signal/interrupt handling in time-travel=ext mode, which
is the next patch.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Johannes Berg 2021-03-05 13:19:55 +01:00 committed by Richard Weinberger
parent fbb42e7fe2
commit 33c7d0616a
2 changed files with 23 additions and 11 deletions
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12
arch/um/include/linux/time-internal.h
View File

@ -8,17 +8,11 @@
#define __TIMER_INTERNAL_H__
#include <linux/list.h>
#include <asm/bug.h>
#include <shared/timetravel.h>
#define TIMER_MULTIPLIER 256
#define TIMER_MIN_DELTA 500
enum time_travel_mode {
TT_MODE_OFF,
TT_MODE_BASIC,
TT_MODE_INFCPU,
TT_MODE_EXTERNAL,
};
#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
struct time_travel_event {
unsigned long long time;
@ -27,8 +21,6 @@ struct time_travel_event {
bool pending, onstack;
};
extern enum time_travel_mode time_travel_mode;
void time_travel_sleep(void);
static inline void
@ -62,8 +54,6 @@ bool time_travel_del_event(struct time_travel_event *e);
struct time_travel_event {
};
#define time_travel_mode TT_MODE_OFF
static inline void time_travel_sleep(void)
{
}

22
arch/um/include/shared/timetravel.h Normal file
View File

@ -0,0 +1,22 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019-2021 Intel Corporation
*/
#ifndef _UM_TIME_TRAVEL_H_
#define _UM_TIME_TRAVEL_H_
enum time_travel_mode {
TT_MODE_OFF,
TT_MODE_BASIC,
TT_MODE_INFCPU,
TT_MODE_EXTERNAL,
};
#if defined(UML_CONFIG_UML_TIME_TRAVEL_SUPPORT) || \
defined(CONFIG_UML_TIME_TRAVEL_SUPPORT)
extern enum time_travel_mode time_travel_mode;
#else
#define time_travel_mode TT_MODE_OFF
#endif /* (UML_)CONFIG_UML_TIME_TRAVEL_SUPPORT */
#endif /* _UM_TIME_TRAVEL_H_ */