HardenedBSD/sys/x86/include/vdso.h
Sepherosa Ziehau fff5be0be3 hyperv: Implement userspace gettimeofday(2) with Hyper-V reference TSC
This 6 times gettimeofday performance, as measured by
tools/tools/syscall_timing

Reviewed by:	kib
MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8789
2016-12-19 07:40:45 +00:00

52 lines
1.9 KiB
C

/*-
* Copyright 2012 Konstantin Belousov <kib@FreeBSD.ORG>.
* Copyright 2016 The FreeBSD Foundation.
* All rights reserved.
*
* Portions of this software were developed by Konstantin Belousov
* under sponsorship from the FreeBSD Foundation.
*
* 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 ``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 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_VDSO_H
#define _X86_VDSO_H
#define VDSO_TIMEHANDS_MD \
uint32_t th_x86_shift; \
uint32_t th_x86_hpet_idx; \
uint32_t th_res[6];
#define VDSO_TH_ALGO_X86_TSC VDSO_TH_ALGO_1
#define VDSO_TH_ALGO_X86_HPET VDSO_TH_ALGO_2
#define VDSO_TH_ALGO_X86_HVTSC VDSO_TH_ALGO_3 /* Hyper-V ref. TSC */
#ifdef _KERNEL
#ifdef COMPAT_FREEBSD32
#define VDSO_TIMEHANDS_MD32 VDSO_TIMEHANDS_MD
#endif
#endif
#endif