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0bc8fb4dda
In external or inf-cpu time-travel mode, ndelay/udelay currently just waste CPU time since the simulation time doesn't advance. Implement them properly in this case. Note that the "if (time_travel_mode == ...)" parts compile out if CONFIG_UML_TIME_TRAVEL_SUPPORT isn't set, time_travel_mode is defined to TT_MODE_OFF in that case. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
30 lines
658 B
C
30 lines
658 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __UM_DELAY_H
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#define __UM_DELAY_H
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#include <asm-generic/delay.h>
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#include <linux/time-internal.h>
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static inline void um_ndelay(unsigned long nsecs)
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{
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if (time_travel_mode == TT_MODE_INFCPU ||
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time_travel_mode == TT_MODE_EXTERNAL) {
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time_travel_ndelay(nsecs);
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return;
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}
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ndelay(nsecs);
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}
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#undef ndelay
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#define ndelay um_ndelay
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static inline void um_udelay(unsigned long usecs)
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{
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if (time_travel_mode == TT_MODE_INFCPU ||
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time_travel_mode == TT_MODE_EXTERNAL) {
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time_travel_ndelay(1000 * usecs);
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return;
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}
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udelay(usecs);
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}
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#undef udelay
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#define udelay um_udelay
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#endif /* __UM_DELAY_H */
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