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058e24d34b
to SIGTERM when ACPI is enabled. Sending SIGTERM to the hypervisor when an ACPI-aware OS is running will now trigger a soft-off allowing for a graceful shutdown of the guest. - Move constants for ACPI-related registers to acpi.h. - Implement an SMI_CMD register with commands to enable and disable ACPI. Currently the only change when ACPI is enabled is to enable the virtual power button via SIGTERM. - Implement a fixed-feature power button when ACPI is enabled by asserting PWRBTN_STS in PM1_EVT when SIGTERM is received. - Add support for EVFILT_SIGNAL events to mevent. - Implement support for the ACPI system command interrupt (SCI) and assert it when needed based on the values in PM1_EVT. Mark the SCI as active-low and level triggered in the MADT and MP Table. - Mark PCI interrupts in the MP Table as active-low in addition to level triggered. Reviewed by: neel
174 lines
4.3 KiB
C
174 lines
4.3 KiB
C
/*-
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* Copyright (c) 2012 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <machine/cpufunc.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <assert.h>
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#include <pthread.h>
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#include "acpi.h"
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#include "inout.h"
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/*
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* The ACPI Power Management timer is a free-running 24- or 32-bit
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* timer with a frequency of 3.579545MHz
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*
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* This implementation will be 32-bits
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*/
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#define PMTMR_FREQ 3579545 /* 3.579545MHz */
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static pthread_mutex_t pmtmr_mtx;
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static pthread_once_t pmtmr_once = PTHREAD_ONCE_INIT;
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static uint64_t pmtmr_old;
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static uint64_t pmtmr_tscf;
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static uint64_t pmtmr_tsc_old;
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static clockid_t clockid = CLOCK_UPTIME_FAST;
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static struct timespec pmtmr_uptime_old;
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#define timespecsub(vvp, uvp) \
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do { \
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(vvp)->tv_sec -= (uvp)->tv_sec; \
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(vvp)->tv_nsec -= (uvp)->tv_nsec; \
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if ((vvp)->tv_nsec < 0) { \
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(vvp)->tv_sec--; \
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(vvp)->tv_nsec += 1000000000; \
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} \
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} while (0)
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static uint64_t
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timespec_to_pmtmr(const struct timespec *tsnew, const struct timespec *tsold)
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{
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struct timespec tsdiff;
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int64_t nsecs;
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tsdiff = *tsnew;
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timespecsub(&tsdiff, tsold);
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nsecs = tsdiff.tv_sec * 1000000000 + tsdiff.tv_nsec;
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assert(nsecs >= 0);
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return (nsecs * PMTMR_FREQ / 1000000000 + pmtmr_old);
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}
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static uint64_t
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tsc_to_pmtmr(uint64_t tsc_new, uint64_t tsc_old)
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{
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return ((tsc_new - tsc_old) * PMTMR_FREQ / pmtmr_tscf + pmtmr_old);
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}
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static void
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pmtmr_init(void)
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{
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size_t len;
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int smp_tsc, err;
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struct timespec tsnew, tsold = { 0 };
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len = sizeof(smp_tsc);
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err = sysctlbyname("kern.timecounter.smp_tsc", &smp_tsc, &len, NULL, 0);
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assert(err == 0);
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if (smp_tsc) {
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len = sizeof(pmtmr_tscf);
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err = sysctlbyname("machdep.tsc_freq", &pmtmr_tscf, &len,
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NULL, 0);
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assert(err == 0);
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pmtmr_tsc_old = rdtsc();
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pmtmr_old = tsc_to_pmtmr(pmtmr_tsc_old, 0);
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} else {
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if (getenv("BHYVE_PMTMR_PRECISE") != NULL)
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clockid = CLOCK_UPTIME;
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err = clock_gettime(clockid, &tsnew);
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assert(err == 0);
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pmtmr_uptime_old = tsnew;
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pmtmr_old = timespec_to_pmtmr(&tsnew, &tsold);
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}
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pthread_mutex_init(&pmtmr_mtx, NULL);
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}
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static uint32_t
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pmtmr_val(void)
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{
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struct timespec tsnew;
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uint64_t pmtmr_tsc_new;
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uint64_t pmtmr_new;
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int error;
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pthread_once(&pmtmr_once, pmtmr_init);
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pthread_mutex_lock(&pmtmr_mtx);
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if (pmtmr_tscf) {
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pmtmr_tsc_new = rdtsc();
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pmtmr_new = tsc_to_pmtmr(pmtmr_tsc_new, pmtmr_tsc_old);
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pmtmr_tsc_old = pmtmr_tsc_new;
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} else {
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error = clock_gettime(clockid, &tsnew);
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assert(error == 0);
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pmtmr_new = timespec_to_pmtmr(&tsnew, &pmtmr_uptime_old);
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pmtmr_uptime_old = tsnew;
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}
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pmtmr_old = pmtmr_new;
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pthread_mutex_unlock(&pmtmr_mtx);
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return (pmtmr_new);
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}
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static int
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pmtmr_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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uint32_t *eax, void *arg)
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{
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assert(in == 1);
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if (bytes != 4)
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return (-1);
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*eax = pmtmr_val();
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return (0);
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}
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INOUT_PORT(pmtmr, IO_PMTMR, IOPORT_F_IN, pmtmr_handler);
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