565bbb8698
upcoming in-kernel device emulations like the HPET. The ioctls VM_IOAPIC_ASSERT_IRQ and VM_IOAPIC_DEASSERT_IRQ are used to manipulate the ioapic pin state. Discussed with: grehan@ Submitted by: Tycho Nightingale (tycho.nightingale@pluribusnetworks.com)
701 lines
15 KiB
C
701 lines
15 KiB
C
/*-
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* Copyright (c) 2011 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/mman.h>
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#include <sys/time.h>
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#include <machine/segments.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <err.h>
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#include <libgen.h>
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#include <unistd.h>
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#include <assert.h>
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#include <errno.h>
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#include <pthread.h>
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#include <pthread_np.h>
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#include <sysexits.h>
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#include <machine/vmm.h>
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#include <vmmapi.h>
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#include "bhyverun.h"
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#include "acpi.h"
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#include "inout.h"
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#include "dbgport.h"
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#include "legacy_irq.h"
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#include "mem.h"
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#include "mevent.h"
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#include "mptbl.h"
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#include "pci_emul.h"
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#include "pci_lpc.h"
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#include "xmsr.h"
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#include "spinup_ap.h"
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#include "rtc.h"
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#define GUEST_NIO_PORT 0x488 /* guest upcalls via i/o port */
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#define VMEXIT_SWITCH 0 /* force vcpu switch in mux mode */
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#define VMEXIT_CONTINUE 1 /* continue from next instruction */
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#define VMEXIT_RESTART 2 /* restart current instruction */
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#define VMEXIT_ABORT 3 /* abort the vm run loop */
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#define VMEXIT_RESET 4 /* guest machine has reset */
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#define MB (1024UL * 1024)
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#define GB (1024UL * MB)
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typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu);
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char *vmname;
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int guest_ncpus;
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static int pincpu = -1;
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static int guest_vmexit_on_hlt, guest_vmexit_on_pause, disable_x2apic;
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static int virtio_msix = 1;
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static int foundcpus;
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static int strictio;
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static int acpi;
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static char *progname;
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static const int BSP = 0;
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static int cpumask;
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static void vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip);
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struct vm_exit vmexit[VM_MAXCPU];
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struct bhyvestats {
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uint64_t vmexit_bogus;
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uint64_t vmexit_bogus_switch;
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uint64_t vmexit_hlt;
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uint64_t vmexit_pause;
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uint64_t vmexit_mtrap;
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uint64_t vmexit_inst_emul;
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uint64_t cpu_switch_rotate;
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uint64_t cpu_switch_direct;
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int io_reset;
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} stats;
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struct mt_vmm_info {
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pthread_t mt_thr;
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struct vmctx *mt_ctx;
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int mt_vcpu;
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} mt_vmm_info[VM_MAXCPU];
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static void
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usage(int code)
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{
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fprintf(stderr,
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"Usage: %s [-aehAHIPW] [-g <gdb port>] [-s <pci>] [-S <pci>]\n"
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" %*s [-c vcpus] [-p pincpu] [-m mem] [-l <lpc>] <vm>\n"
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" -a: local apic is in XAPIC mode (default is X2APIC)\n"
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" -A: create an ACPI table\n"
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" -g: gdb port\n"
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" -c: # cpus (default 1)\n"
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" -p: pin vcpu 'n' to host cpu 'pincpu + n'\n"
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" -H: vmexit from the guest on hlt\n"
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" -P: vmexit from the guest on pause\n"
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" -W: force virtio to use single-vector MSI\n"
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" -e: exit on unhandled I/O access\n"
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" -h: help\n"
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" -s: <slot,driver,configinfo> PCI slot config\n"
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" -S: <slot,driver,configinfo> legacy PCI slot config\n"
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" -l: LPC device configuration\n"
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" -m: memory size in MB\n",
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progname, (int)strlen(progname), "");
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exit(code);
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}
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void *
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paddr_guest2host(struct vmctx *ctx, uintptr_t gaddr, size_t len)
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{
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return (vm_map_gpa(ctx, gaddr, len));
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}
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int
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fbsdrun_disable_x2apic(void)
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{
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return (disable_x2apic);
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}
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int
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fbsdrun_vmexit_on_pause(void)
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{
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return (guest_vmexit_on_pause);
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}
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int
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fbsdrun_vmexit_on_hlt(void)
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{
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return (guest_vmexit_on_hlt);
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}
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int
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fbsdrun_virtio_msix(void)
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{
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return (virtio_msix);
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}
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static void *
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fbsdrun_start_thread(void *param)
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{
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char tname[MAXCOMLEN + 1];
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struct mt_vmm_info *mtp;
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int vcpu;
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mtp = param;
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vcpu = mtp->mt_vcpu;
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snprintf(tname, sizeof(tname), "vcpu %d", vcpu);
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pthread_set_name_np(mtp->mt_thr, tname);
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vm_loop(mtp->mt_ctx, vcpu, vmexit[vcpu].rip);
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/* not reached */
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exit(1);
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return (NULL);
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}
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void
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fbsdrun_addcpu(struct vmctx *ctx, int vcpu, uint64_t rip)
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{
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int error;
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if (cpumask & (1 << vcpu)) {
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fprintf(stderr, "addcpu: attempting to add existing cpu %d\n",
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vcpu);
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exit(1);
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}
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cpumask |= 1 << vcpu;
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foundcpus++;
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/*
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* Set up the vmexit struct to allow execution to start
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* at the given RIP
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*/
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vmexit[vcpu].rip = rip;
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vmexit[vcpu].inst_length = 0;
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mt_vmm_info[vcpu].mt_ctx = ctx;
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mt_vmm_info[vcpu].mt_vcpu = vcpu;
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error = pthread_create(&mt_vmm_info[vcpu].mt_thr, NULL,
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fbsdrun_start_thread, &mt_vmm_info[vcpu]);
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assert(error == 0);
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}
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static int
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vmexit_catch_reset(void)
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{
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stats.io_reset++;
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return (VMEXIT_RESET);
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}
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static int
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vmexit_catch_inout(void)
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{
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return (VMEXIT_ABORT);
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}
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static int
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vmexit_handle_notify(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu,
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uint32_t eax)
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{
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#if BHYVE_DEBUG
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/*
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* put guest-driven debug here
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*/
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#endif
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return (VMEXIT_CONTINUE);
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}
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static int
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vmexit_inout(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
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{
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int error;
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int bytes, port, in, out;
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uint32_t eax;
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int vcpu;
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vcpu = *pvcpu;
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port = vme->u.inout.port;
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bytes = vme->u.inout.bytes;
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eax = vme->u.inout.eax;
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in = vme->u.inout.in;
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out = !in;
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/* We don't deal with these */
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if (vme->u.inout.string || vme->u.inout.rep)
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return (VMEXIT_ABORT);
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/* Special case of guest reset */
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if (out && port == 0x64 && (uint8_t)eax == 0xFE)
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return (vmexit_catch_reset());
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/* Extra-special case of host notifications */
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if (out && port == GUEST_NIO_PORT)
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return (vmexit_handle_notify(ctx, vme, pvcpu, eax));
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error = emulate_inout(ctx, vcpu, in, port, bytes, &eax, strictio);
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if (error == 0 && in)
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error = vm_set_register(ctx, vcpu, VM_REG_GUEST_RAX, eax);
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if (error == 0)
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return (VMEXIT_CONTINUE);
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else {
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fprintf(stderr, "Unhandled %s%c 0x%04x\n",
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in ? "in" : "out",
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bytes == 1 ? 'b' : (bytes == 2 ? 'w' : 'l'), port);
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return (vmexit_catch_inout());
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}
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}
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static int
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vmexit_rdmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
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{
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fprintf(stderr, "vm exit rdmsr 0x%x, cpu %d\n", vme->u.msr.code,
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*pvcpu);
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return (VMEXIT_ABORT);
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}
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static int
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vmexit_wrmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
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{
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int newcpu;
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int retval = VMEXIT_CONTINUE;
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newcpu = emulate_wrmsr(ctx, *pvcpu, vme->u.msr.code,vme->u.msr.wval);
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return (retval);
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}
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static int
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vmexit_spinup_ap(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
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{
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int newcpu;
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int retval = VMEXIT_CONTINUE;
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newcpu = spinup_ap(ctx, *pvcpu,
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vme->u.spinup_ap.vcpu, vme->u.spinup_ap.rip);
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return (retval);
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}
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static int
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vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
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{
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fprintf(stderr, "vm exit[%d]\n", *pvcpu);
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fprintf(stderr, "\treason\t\tVMX\n");
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fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip);
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fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length);
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fprintf(stderr, "\terror\t\t%d\n", vmexit->u.vmx.error);
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fprintf(stderr, "\texit_reason\t%u\n", vmexit->u.vmx.exit_reason);
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fprintf(stderr, "\tqualification\t0x%016lx\n",
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vmexit->u.vmx.exit_qualification);
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return (VMEXIT_ABORT);
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}
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static int
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vmexit_bogus(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
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{
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stats.vmexit_bogus++;
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return (VMEXIT_RESTART);
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}
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static int
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vmexit_hlt(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
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{
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stats.vmexit_hlt++;
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/*
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* Just continue execution with the next instruction. We use
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* the HLT VM exit as a way to be friendly with the host
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* scheduler.
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*/
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return (VMEXIT_CONTINUE);
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}
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static int
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vmexit_pause(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
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{
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stats.vmexit_pause++;
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return (VMEXIT_CONTINUE);
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}
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static int
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vmexit_mtrap(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
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{
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stats.vmexit_mtrap++;
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return (VMEXIT_RESTART);
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}
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static int
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vmexit_inst_emul(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
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{
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int err;
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stats.vmexit_inst_emul++;
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err = emulate_mem(ctx, *pvcpu, vmexit->u.inst_emul.gpa,
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&vmexit->u.inst_emul.vie);
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if (err) {
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if (err == EINVAL) {
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fprintf(stderr,
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"Failed to emulate instruction at 0x%lx\n",
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vmexit->rip);
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} else if (err == ESRCH) {
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fprintf(stderr, "Unhandled memory access to 0x%lx\n",
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vmexit->u.inst_emul.gpa);
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}
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return (VMEXIT_ABORT);
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}
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return (VMEXIT_CONTINUE);
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}
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static vmexit_handler_t handler[VM_EXITCODE_MAX] = {
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[VM_EXITCODE_INOUT] = vmexit_inout,
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[VM_EXITCODE_VMX] = vmexit_vmx,
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[VM_EXITCODE_BOGUS] = vmexit_bogus,
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[VM_EXITCODE_RDMSR] = vmexit_rdmsr,
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[VM_EXITCODE_WRMSR] = vmexit_wrmsr,
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[VM_EXITCODE_MTRAP] = vmexit_mtrap,
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[VM_EXITCODE_INST_EMUL] = vmexit_inst_emul,
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[VM_EXITCODE_SPINUP_AP] = vmexit_spinup_ap,
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};
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static void
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vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip)
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{
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cpuset_t mask;
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int error, rc, prevcpu;
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enum vm_exitcode exitcode;
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if (pincpu >= 0) {
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CPU_ZERO(&mask);
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CPU_SET(pincpu + vcpu, &mask);
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error = pthread_setaffinity_np(pthread_self(),
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sizeof(mask), &mask);
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assert(error == 0);
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}
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while (1) {
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error = vm_run(ctx, vcpu, rip, &vmexit[vcpu]);
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if (error != 0) {
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/*
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* It is possible that 'vmmctl' or some other process
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* has transitioned the vcpu to CANNOT_RUN state right
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* before we tried to transition it to RUNNING.
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*
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* This is expected to be temporary so just retry.
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*/
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if (errno == EBUSY)
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continue;
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else
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break;
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}
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prevcpu = vcpu;
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exitcode = vmexit[vcpu].exitcode;
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if (exitcode >= VM_EXITCODE_MAX || handler[exitcode] == NULL) {
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fprintf(stderr, "vm_loop: unexpected exitcode 0x%x\n",
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exitcode);
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exit(1);
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}
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rc = (*handler[exitcode])(ctx, &vmexit[vcpu], &vcpu);
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switch (rc) {
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case VMEXIT_CONTINUE:
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rip = vmexit[vcpu].rip + vmexit[vcpu].inst_length;
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break;
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case VMEXIT_RESTART:
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rip = vmexit[vcpu].rip;
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break;
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case VMEXIT_RESET:
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exit(0);
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default:
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exit(1);
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}
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}
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fprintf(stderr, "vm_run error %d, errno %d\n", error, errno);
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}
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static int
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num_vcpus_allowed(struct vmctx *ctx)
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{
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int tmp, error;
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error = vm_get_capability(ctx, BSP, VM_CAP_UNRESTRICTED_GUEST, &tmp);
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/*
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* The guest is allowed to spinup more than one processor only if the
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* UNRESTRICTED_GUEST capability is available.
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*/
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if (error == 0)
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return (VM_MAXCPU);
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else
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return (1);
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}
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void
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fbsdrun_set_capabilities(struct vmctx *ctx, int cpu)
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{
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int err, tmp;
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if (fbsdrun_vmexit_on_hlt()) {
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err = vm_get_capability(ctx, cpu, VM_CAP_HALT_EXIT, &tmp);
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if (err < 0) {
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fprintf(stderr, "VM exit on HLT not supported\n");
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exit(1);
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}
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vm_set_capability(ctx, cpu, VM_CAP_HALT_EXIT, 1);
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if (cpu == BSP)
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handler[VM_EXITCODE_HLT] = vmexit_hlt;
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}
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if (fbsdrun_vmexit_on_pause()) {
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/*
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* pause exit support required for this mode
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*/
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err = vm_get_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, &tmp);
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if (err < 0) {
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fprintf(stderr,
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"SMP mux requested, no pause support\n");
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exit(1);
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}
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vm_set_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, 1);
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if (cpu == BSP)
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handler[VM_EXITCODE_PAUSE] = vmexit_pause;
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}
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|
|
if (fbsdrun_disable_x2apic())
|
|
err = vm_set_x2apic_state(ctx, cpu, X2APIC_DISABLED);
|
|
else
|
|
err = vm_set_x2apic_state(ctx, cpu, X2APIC_ENABLED);
|
|
|
|
if (err) {
|
|
fprintf(stderr, "Unable to set x2apic state (%d)\n", err);
|
|
exit(1);
|
|
}
|
|
|
|
vm_set_capability(ctx, cpu, VM_CAP_ENABLE_INVPCID, 1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int c, error, gdb_port, err, bvmcons;
|
|
int max_vcpus;
|
|
struct vmctx *ctx;
|
|
uint64_t rip;
|
|
size_t memsize;
|
|
|
|
bvmcons = 0;
|
|
progname = basename(argv[0]);
|
|
gdb_port = 0;
|
|
guest_ncpus = 1;
|
|
memsize = 256 * MB;
|
|
|
|
while ((c = getopt(argc, argv, "abehAHIPWp:g:c:s:S:m:l:")) != -1) {
|
|
switch (c) {
|
|
case 'a':
|
|
disable_x2apic = 1;
|
|
break;
|
|
case 'A':
|
|
acpi = 1;
|
|
break;
|
|
case 'b':
|
|
bvmcons = 1;
|
|
break;
|
|
case 'p':
|
|
pincpu = atoi(optarg);
|
|
break;
|
|
case 'c':
|
|
guest_ncpus = atoi(optarg);
|
|
break;
|
|
case 'g':
|
|
gdb_port = atoi(optarg);
|
|
break;
|
|
case 'l':
|
|
if (lpc_device_parse(optarg) != 0) {
|
|
errx(EX_USAGE, "invalid lpc device "
|
|
"configuration '%s'", optarg);
|
|
}
|
|
break;
|
|
case 's':
|
|
if (pci_parse_slot(optarg, 0) != 0)
|
|
exit(1);
|
|
else
|
|
break;
|
|
case 'S':
|
|
if (pci_parse_slot(optarg, 1) != 0)
|
|
exit(1);
|
|
else
|
|
break;
|
|
case 'm':
|
|
error = vm_parse_memsize(optarg, &memsize);
|
|
if (error)
|
|
errx(EX_USAGE, "invalid memsize '%s'", optarg);
|
|
break;
|
|
case 'H':
|
|
guest_vmexit_on_hlt = 1;
|
|
break;
|
|
case 'I':
|
|
/*
|
|
* The "-I" option was used to add an ioapic to the
|
|
* virtual machine.
|
|
*
|
|
* An ioapic is now provided unconditionally for each
|
|
* virtual machine and this option is now deprecated.
|
|
*/
|
|
break;
|
|
case 'P':
|
|
guest_vmexit_on_pause = 1;
|
|
break;
|
|
case 'e':
|
|
strictio = 1;
|
|
break;
|
|
case 'W':
|
|
virtio_msix = 0;
|
|
break;
|
|
case 'h':
|
|
usage(0);
|
|
default:
|
|
usage(1);
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc != 1)
|
|
usage(1);
|
|
|
|
vmname = argv[0];
|
|
|
|
ctx = vm_open(vmname);
|
|
if (ctx == NULL) {
|
|
perror("vm_open");
|
|
exit(1);
|
|
}
|
|
|
|
max_vcpus = num_vcpus_allowed(ctx);
|
|
if (guest_ncpus > max_vcpus) {
|
|
fprintf(stderr, "%d vCPUs requested but only %d available\n",
|
|
guest_ncpus, max_vcpus);
|
|
exit(1);
|
|
}
|
|
|
|
fbsdrun_set_capabilities(ctx, BSP);
|
|
|
|
err = vm_setup_memory(ctx, memsize, VM_MMAP_ALL);
|
|
if (err) {
|
|
fprintf(stderr, "Unable to setup memory (%d)\n", err);
|
|
exit(1);
|
|
}
|
|
|
|
init_mem();
|
|
init_inout();
|
|
legacy_irq_init();
|
|
|
|
rtc_init(ctx);
|
|
|
|
/*
|
|
* Exit if a device emulation finds an error in it's initilization
|
|
*/
|
|
if (init_pci(ctx) != 0)
|
|
exit(1);
|
|
|
|
if (gdb_port != 0)
|
|
init_dbgport(gdb_port);
|
|
|
|
if (bvmcons)
|
|
init_bvmcons();
|
|
|
|
error = vm_get_register(ctx, BSP, VM_REG_GUEST_RIP, &rip);
|
|
assert(error == 0);
|
|
|
|
/*
|
|
* build the guest tables, MP etc.
|
|
*/
|
|
mptable_build(ctx, guest_ncpus);
|
|
|
|
if (acpi) {
|
|
error = acpi_build(ctx, guest_ncpus);
|
|
assert(error == 0);
|
|
}
|
|
|
|
/*
|
|
* Change the proc title to include the VM name.
|
|
*/
|
|
setproctitle("%s", vmname);
|
|
|
|
/*
|
|
* Add CPU 0
|
|
*/
|
|
fbsdrun_addcpu(ctx, BSP, rip);
|
|
|
|
/*
|
|
* Head off to the main event dispatch loop
|
|
*/
|
|
mevent_dispatch();
|
|
|
|
exit(1);
|
|
}
|