diff options
Diffstat (limited to 'usr.sbin/bhyve/pmtmr.c')
| -rw-r--r-- | usr.sbin/bhyve/pmtmr.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/usr.sbin/bhyve/pmtmr.c b/usr.sbin/bhyve/pmtmr.c deleted file mode 100644 index 3a46f9b..0000000 --- a/usr.sbin/bhyve/pmtmr.c +++ /dev/null @@ -1,173 +0,0 @@ -/*- - * Copyright (c) 2012 NetApp, Inc. - * 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 NETAPP, INC ``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 NETAPP, INC 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. - * - * $FreeBSD$ - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/types.h> -#include <sys/sysctl.h> -#include <sys/time.h> -#include <machine/cpufunc.h> - -#include <stdio.h> -#include <stdlib.h> -#include <time.h> -#include <assert.h> -#include <pthread.h> - -#include "acpi.h" -#include "inout.h" - -/* - * The ACPI Power Management timer is a free-running 24- or 32-bit - * timer with a frequency of 3.579545MHz - * - * This implementation will be 32-bits - */ - -#define PMTMR_FREQ 3579545 /* 3.579545MHz */ - -static pthread_mutex_t pmtmr_mtx; -static pthread_once_t pmtmr_once = PTHREAD_ONCE_INIT; - -static uint64_t pmtmr_old; - -static uint64_t pmtmr_tscf; -static uint64_t pmtmr_tsc_old; - -static clockid_t clockid = CLOCK_UPTIME_FAST; -static struct timespec pmtmr_uptime_old; - -#define timespecsub(vvp, uvp) \ - do { \ - (vvp)->tv_sec -= (uvp)->tv_sec; \ - (vvp)->tv_nsec -= (uvp)->tv_nsec; \ - if ((vvp)->tv_nsec < 0) { \ - (vvp)->tv_sec--; \ - (vvp)->tv_nsec += 1000000000; \ - } \ - } while (0) - -static uint64_t -timespec_to_pmtmr(const struct timespec *tsnew, const struct timespec *tsold) -{ - struct timespec tsdiff; - int64_t nsecs; - - tsdiff = *tsnew; - timespecsub(&tsdiff, tsold); - nsecs = tsdiff.tv_sec * 1000000000 + tsdiff.tv_nsec; - assert(nsecs >= 0); - - return (nsecs * PMTMR_FREQ / 1000000000 + pmtmr_old); -} - -static uint64_t -tsc_to_pmtmr(uint64_t tsc_new, uint64_t tsc_old) -{ - - return ((tsc_new - tsc_old) * PMTMR_FREQ / pmtmr_tscf + pmtmr_old); -} - -static void -pmtmr_init(void) -{ - size_t len; - int smp_tsc, err; - struct timespec tsnew, tsold = { 0 }; - - len = sizeof(smp_tsc); - err = sysctlbyname("kern.timecounter.smp_tsc", &smp_tsc, &len, NULL, 0); - assert(err == 0); - - if (smp_tsc) { - len = sizeof(pmtmr_tscf); - err = sysctlbyname("machdep.tsc_freq", &pmtmr_tscf, &len, - NULL, 0); - assert(err == 0); - - pmtmr_tsc_old = rdtsc(); - pmtmr_old = tsc_to_pmtmr(pmtmr_tsc_old, 0); - } else { - if (getenv("BHYVE_PMTMR_PRECISE") != NULL) - clockid = CLOCK_UPTIME; - - err = clock_gettime(clockid, &tsnew); - assert(err == 0); - - pmtmr_uptime_old = tsnew; - pmtmr_old = timespec_to_pmtmr(&tsnew, &tsold); - } - pthread_mutex_init(&pmtmr_mtx, NULL); -} - -static uint32_t -pmtmr_val(void) -{ - struct timespec tsnew; - uint64_t pmtmr_tsc_new; - uint64_t pmtmr_new; - int error; - - pthread_once(&pmtmr_once, pmtmr_init); - - pthread_mutex_lock(&pmtmr_mtx); - - if (pmtmr_tscf) { - pmtmr_tsc_new = rdtsc(); - pmtmr_new = tsc_to_pmtmr(pmtmr_tsc_new, pmtmr_tsc_old); - pmtmr_tsc_old = pmtmr_tsc_new; - } else { - error = clock_gettime(clockid, &tsnew); - assert(error == 0); - - pmtmr_new = timespec_to_pmtmr(&tsnew, &pmtmr_uptime_old); - pmtmr_uptime_old = tsnew; - } - pmtmr_old = pmtmr_new; - - pthread_mutex_unlock(&pmtmr_mtx); - - return (pmtmr_new); -} - -static int -pmtmr_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, - uint32_t *eax, void *arg) -{ - assert(in == 1); - - if (bytes != 4) - return (-1); - - *eax = pmtmr_val(); - - return (0); -} - -INOUT_PORT(pmtmr, IO_PMTMR, IOPORT_F_IN, pmtmr_handler); |
