4025433eb2
This can later use this to determine the TSC frequency like is done with VMware, instead of using a DELAY loop that is not always accurate in an VM. MFC after: 1 month
60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/*-
|
|
* Copyright (c) 2014, Bryan Venteicher <bryanv@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef X86_PVCLOCK
|
|
#define X86_PVCLOCK
|
|
|
|
struct pvclock_vcpu_time_info {
|
|
uint32_t version;
|
|
uint32_t pad0;
|
|
uint64_t tsc_timestamp;
|
|
uint64_t system_time;
|
|
uint32_t tsc_to_system_mul;
|
|
int8_t tsc_shift;
|
|
uint8_t flags;
|
|
uint8_t pad[2];
|
|
};
|
|
|
|
#define PVCLOCK_FLAG_TSC_STABLE 0x01
|
|
#define PVCLOCK_FLAG_GUEST_PASUED 0x02
|
|
|
|
struct pvclock_wall_clock {
|
|
uint32_t version;
|
|
uint32_t sec;
|
|
uint32_t nsec;
|
|
};
|
|
|
|
void pvclock_resume(void);
|
|
uint64_t pvclock_get_last_cycles(void);
|
|
uint64_t pvclock_tsc_freq(struct pvclock_vcpu_time_info *ti);
|
|
uint64_t pvclock_get_timecount(struct pvclock_vcpu_time_info *ti);
|
|
void pvclock_get_wallclock(struct pvclock_wall_clock *wc,
|
|
struct timespec *ts);
|
|
|
|
#endif
|