ade4af668a
These APIs were relevant when memory for virtual machine allocation was hard partitioned away from the rest of the system but that is no longer the case. The sysctls that provided this information were garbage collected a while back. Obtained from: NetApp
744 lines
16 KiB
C
744 lines
16 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/sysctl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <machine/specialreg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <machine/vmm.h>
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#include <machine/vmm_dev.h>
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#include "vmmapi.h"
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#define GB (1024 * 1024 * 1024UL)
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struct vmctx {
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int fd;
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uint32_t lowmem_limit;
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enum vm_mmap_style vms;
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size_t lowmem;
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char *lowmem_addr;
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size_t highmem;
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char *highmem_addr;
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char *name;
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};
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#define CREATE(x) sysctlbyname("hw.vmm.create", NULL, NULL, (x), strlen((x)))
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#define DESTROY(x) sysctlbyname("hw.vmm.destroy", NULL, NULL, (x), strlen((x)))
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static int
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vm_device_open(const char *name)
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{
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int fd, len;
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char *vmfile;
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len = strlen("/dev/vmm/") + strlen(name) + 1;
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vmfile = malloc(len);
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assert(vmfile != NULL);
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snprintf(vmfile, len, "/dev/vmm/%s", name);
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/* Open the device file */
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fd = open(vmfile, O_RDWR, 0);
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free(vmfile);
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return (fd);
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}
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int
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vm_create(const char *name)
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{
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return (CREATE((char *)name));
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}
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struct vmctx *
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vm_open(const char *name)
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{
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struct vmctx *vm;
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vm = malloc(sizeof(struct vmctx) + strlen(name) + 1);
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assert(vm != NULL);
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vm->fd = -1;
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vm->lowmem_limit = 3 * GB;
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vm->name = (char *)(vm + 1);
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strcpy(vm->name, name);
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if ((vm->fd = vm_device_open(vm->name)) < 0)
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goto err;
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return (vm);
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err:
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vm_destroy(vm);
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return (NULL);
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}
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void
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vm_destroy(struct vmctx *vm)
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{
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assert(vm != NULL);
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if (vm->fd >= 0)
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close(vm->fd);
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DESTROY(vm->name);
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free(vm);
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}
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int
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vm_get_memory_seg(struct vmctx *ctx, vm_paddr_t gpa, size_t *ret_len)
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{
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int error;
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struct vm_memory_segment seg;
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bzero(&seg, sizeof(seg));
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seg.gpa = gpa;
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error = ioctl(ctx->fd, VM_GET_MEMORY_SEG, &seg);
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*ret_len = seg.len;
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return (error);
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}
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uint32_t
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vm_get_lowmem_limit(struct vmctx *ctx)
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{
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return (ctx->lowmem_limit);
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}
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void
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vm_set_lowmem_limit(struct vmctx *ctx, uint32_t limit)
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{
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ctx->lowmem_limit = limit;
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}
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static int
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setup_memory_segment(struct vmctx *ctx, vm_paddr_t gpa, size_t len, char **addr)
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{
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int error;
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struct vm_memory_segment seg;
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/*
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* Create and optionally map 'len' bytes of memory at guest
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* physical address 'gpa'
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*/
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bzero(&seg, sizeof(seg));
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seg.gpa = gpa;
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seg.len = len;
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error = ioctl(ctx->fd, VM_MAP_MEMORY, &seg);
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if (error == 0 && addr != NULL) {
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*addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED,
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ctx->fd, gpa);
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}
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return (error);
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}
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int
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vm_setup_memory(struct vmctx *ctx, size_t memsize, enum vm_mmap_style vms)
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{
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char **addr;
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int error;
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/* XXX VM_MMAP_SPARSE not implemented yet */
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assert(vms == VM_MMAP_NONE || vms == VM_MMAP_ALL);
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ctx->vms = vms;
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/*
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* If 'memsize' cannot fit entirely in the 'lowmem' segment then
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* create another 'highmem' segment above 4GB for the remainder.
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*/
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if (memsize > ctx->lowmem_limit) {
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ctx->lowmem = ctx->lowmem_limit;
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ctx->highmem = memsize - ctx->lowmem;
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} else {
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ctx->lowmem = memsize;
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ctx->highmem = 0;
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}
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if (ctx->lowmem > 0) {
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addr = (vms == VM_MMAP_ALL) ? &ctx->lowmem_addr : NULL;
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error = setup_memory_segment(ctx, 0, ctx->lowmem, addr);
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if (error)
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return (error);
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}
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if (ctx->highmem > 0) {
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addr = (vms == VM_MMAP_ALL) ? &ctx->highmem_addr : NULL;
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error = setup_memory_segment(ctx, 4*GB, ctx->highmem, addr);
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if (error)
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return (error);
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}
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return (0);
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}
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void *
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vm_map_gpa(struct vmctx *ctx, vm_paddr_t gaddr, size_t len)
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{
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/* XXX VM_MMAP_SPARSE not implemented yet */
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assert(ctx->vms == VM_MMAP_ALL);
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if (gaddr < ctx->lowmem && gaddr + len <= ctx->lowmem)
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return ((void *)(ctx->lowmem_addr + gaddr));
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if (gaddr >= 4*GB) {
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gaddr -= 4*GB;
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if (gaddr < ctx->highmem && gaddr + len <= ctx->highmem)
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return ((void *)(ctx->highmem_addr + gaddr));
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}
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return (NULL);
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}
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int
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vm_set_desc(struct vmctx *ctx, int vcpu, int reg,
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uint64_t base, uint32_t limit, uint32_t access)
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{
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int error;
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struct vm_seg_desc vmsegdesc;
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bzero(&vmsegdesc, sizeof(vmsegdesc));
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vmsegdesc.cpuid = vcpu;
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vmsegdesc.regnum = reg;
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vmsegdesc.desc.base = base;
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vmsegdesc.desc.limit = limit;
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vmsegdesc.desc.access = access;
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error = ioctl(ctx->fd, VM_SET_SEGMENT_DESCRIPTOR, &vmsegdesc);
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return (error);
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}
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int
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vm_get_desc(struct vmctx *ctx, int vcpu, int reg,
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uint64_t *base, uint32_t *limit, uint32_t *access)
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{
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int error;
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struct vm_seg_desc vmsegdesc;
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bzero(&vmsegdesc, sizeof(vmsegdesc));
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vmsegdesc.cpuid = vcpu;
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vmsegdesc.regnum = reg;
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error = ioctl(ctx->fd, VM_GET_SEGMENT_DESCRIPTOR, &vmsegdesc);
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if (error == 0) {
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*base = vmsegdesc.desc.base;
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*limit = vmsegdesc.desc.limit;
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*access = vmsegdesc.desc.access;
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}
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return (error);
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}
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int
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vm_set_register(struct vmctx *ctx, int vcpu, int reg, uint64_t val)
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{
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int error;
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struct vm_register vmreg;
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bzero(&vmreg, sizeof(vmreg));
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vmreg.cpuid = vcpu;
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vmreg.regnum = reg;
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vmreg.regval = val;
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error = ioctl(ctx->fd, VM_SET_REGISTER, &vmreg);
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return (error);
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}
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int
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vm_get_register(struct vmctx *ctx, int vcpu, int reg, uint64_t *ret_val)
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{
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int error;
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struct vm_register vmreg;
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bzero(&vmreg, sizeof(vmreg));
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vmreg.cpuid = vcpu;
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vmreg.regnum = reg;
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error = ioctl(ctx->fd, VM_GET_REGISTER, &vmreg);
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*ret_val = vmreg.regval;
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return (error);
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}
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int
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vm_run(struct vmctx *ctx, int vcpu, uint64_t rip, struct vm_exit *vmexit)
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{
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int error;
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struct vm_run vmrun;
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bzero(&vmrun, sizeof(vmrun));
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vmrun.cpuid = vcpu;
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vmrun.rip = rip;
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error = ioctl(ctx->fd, VM_RUN, &vmrun);
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bcopy(&vmrun.vm_exit, vmexit, sizeof(struct vm_exit));
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return (error);
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}
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static int
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vm_inject_event_real(struct vmctx *ctx, int vcpu, enum vm_event_type type,
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int vector, int error_code, int error_code_valid)
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{
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struct vm_event ev;
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bzero(&ev, sizeof(ev));
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ev.cpuid = vcpu;
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ev.type = type;
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ev.vector = vector;
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ev.error_code = error_code;
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ev.error_code_valid = error_code_valid;
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return (ioctl(ctx->fd, VM_INJECT_EVENT, &ev));
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}
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int
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vm_inject_event(struct vmctx *ctx, int vcpu, enum vm_event_type type,
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int vector)
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{
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return (vm_inject_event_real(ctx, vcpu, type, vector, 0, 0));
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}
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int
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vm_inject_event2(struct vmctx *ctx, int vcpu, enum vm_event_type type,
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int vector, int error_code)
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{
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return (vm_inject_event_real(ctx, vcpu, type, vector, error_code, 1));
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}
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int
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vm_apicid2vcpu(struct vmctx *ctx, int apicid)
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{
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/*
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* The apic id associated with the 'vcpu' has the same numerical value
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* as the 'vcpu' itself.
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*/
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return (apicid);
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}
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int
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vm_lapic_irq(struct vmctx *ctx, int vcpu, int vector)
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{
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struct vm_lapic_irq vmirq;
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bzero(&vmirq, sizeof(vmirq));
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vmirq.cpuid = vcpu;
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vmirq.vector = vector;
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return (ioctl(ctx->fd, VM_LAPIC_IRQ, &vmirq));
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}
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int
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vm_inject_nmi(struct vmctx *ctx, int vcpu)
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{
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struct vm_nmi vmnmi;
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bzero(&vmnmi, sizeof(vmnmi));
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vmnmi.cpuid = vcpu;
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return (ioctl(ctx->fd, VM_INJECT_NMI, &vmnmi));
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}
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static struct {
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const char *name;
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int type;
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} capstrmap[] = {
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{ "hlt_exit", VM_CAP_HALT_EXIT },
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{ "mtrap_exit", VM_CAP_MTRAP_EXIT },
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{ "pause_exit", VM_CAP_PAUSE_EXIT },
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{ "unrestricted_guest", VM_CAP_UNRESTRICTED_GUEST },
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{ 0 }
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};
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int
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vm_capability_name2type(const char *capname)
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{
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int i;
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for (i = 0; capstrmap[i].name != NULL && capname != NULL; i++) {
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if (strcmp(capstrmap[i].name, capname) == 0)
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return (capstrmap[i].type);
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}
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return (-1);
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}
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const char *
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vm_capability_type2name(int type)
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{
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int i;
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for (i = 0; capstrmap[i].name != NULL; i++) {
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if (capstrmap[i].type == type)
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return (capstrmap[i].name);
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}
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return (NULL);
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}
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int
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vm_get_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap,
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int *retval)
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{
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int error;
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struct vm_capability vmcap;
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bzero(&vmcap, sizeof(vmcap));
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vmcap.cpuid = vcpu;
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vmcap.captype = cap;
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error = ioctl(ctx->fd, VM_GET_CAPABILITY, &vmcap);
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*retval = vmcap.capval;
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return (error);
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}
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int
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vm_set_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, int val)
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{
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struct vm_capability vmcap;
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bzero(&vmcap, sizeof(vmcap));
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vmcap.cpuid = vcpu;
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vmcap.captype = cap;
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vmcap.capval = val;
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return (ioctl(ctx->fd, VM_SET_CAPABILITY, &vmcap));
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}
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int
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vm_assign_pptdev(struct vmctx *ctx, int bus, int slot, int func)
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{
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struct vm_pptdev pptdev;
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bzero(&pptdev, sizeof(pptdev));
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pptdev.bus = bus;
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pptdev.slot = slot;
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pptdev.func = func;
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return (ioctl(ctx->fd, VM_BIND_PPTDEV, &pptdev));
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}
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int
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vm_unassign_pptdev(struct vmctx *ctx, int bus, int slot, int func)
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{
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struct vm_pptdev pptdev;
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bzero(&pptdev, sizeof(pptdev));
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pptdev.bus = bus;
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pptdev.slot = slot;
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pptdev.func = func;
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return (ioctl(ctx->fd, VM_UNBIND_PPTDEV, &pptdev));
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}
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int
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vm_map_pptdev_mmio(struct vmctx *ctx, int bus, int slot, int func,
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vm_paddr_t gpa, size_t len, vm_paddr_t hpa)
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{
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struct vm_pptdev_mmio pptmmio;
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bzero(&pptmmio, sizeof(pptmmio));
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pptmmio.bus = bus;
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pptmmio.slot = slot;
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pptmmio.func = func;
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pptmmio.gpa = gpa;
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pptmmio.len = len;
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pptmmio.hpa = hpa;
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return (ioctl(ctx->fd, VM_MAP_PPTDEV_MMIO, &pptmmio));
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}
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int
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vm_setup_msi(struct vmctx *ctx, int vcpu, int bus, int slot, int func,
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int destcpu, int vector, int numvec)
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{
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struct vm_pptdev_msi pptmsi;
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bzero(&pptmsi, sizeof(pptmsi));
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pptmsi.vcpu = vcpu;
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pptmsi.bus = bus;
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pptmsi.slot = slot;
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pptmsi.func = func;
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pptmsi.destcpu = destcpu;
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pptmsi.vector = vector;
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pptmsi.numvec = numvec;
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return (ioctl(ctx->fd, VM_PPTDEV_MSI, &pptmsi));
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}
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int
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vm_setup_msix(struct vmctx *ctx, int vcpu, int bus, int slot, int func,
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int idx, uint32_t msg, uint32_t vector_control, uint64_t addr)
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{
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struct vm_pptdev_msix pptmsix;
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bzero(&pptmsix, sizeof(pptmsix));
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pptmsix.vcpu = vcpu;
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pptmsix.bus = bus;
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pptmsix.slot = slot;
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pptmsix.func = func;
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pptmsix.idx = idx;
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pptmsix.msg = msg;
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pptmsix.addr = addr;
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pptmsix.vector_control = vector_control;
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return ioctl(ctx->fd, VM_PPTDEV_MSIX, &pptmsix);
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}
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uint64_t *
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vm_get_stats(struct vmctx *ctx, int vcpu, struct timeval *ret_tv,
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int *ret_entries)
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{
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int error;
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static struct vm_stats vmstats;
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vmstats.cpuid = vcpu;
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error = ioctl(ctx->fd, VM_STATS, &vmstats);
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if (error == 0) {
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if (ret_entries)
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*ret_entries = vmstats.num_entries;
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if (ret_tv)
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*ret_tv = vmstats.tv;
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return (vmstats.statbuf);
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} else
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return (NULL);
|
|
}
|
|
|
|
const char *
|
|
vm_get_stat_desc(struct vmctx *ctx, int index)
|
|
{
|
|
static struct vm_stat_desc statdesc;
|
|
|
|
statdesc.index = index;
|
|
if (ioctl(ctx->fd, VM_STAT_DESC, &statdesc) == 0)
|
|
return (statdesc.desc);
|
|
else
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
vm_get_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state *state)
|
|
{
|
|
int error;
|
|
struct vm_x2apic x2apic;
|
|
|
|
bzero(&x2apic, sizeof(x2apic));
|
|
x2apic.cpuid = vcpu;
|
|
|
|
error = ioctl(ctx->fd, VM_GET_X2APIC_STATE, &x2apic);
|
|
*state = x2apic.state;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
vm_set_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state state)
|
|
{
|
|
int error;
|
|
struct vm_x2apic x2apic;
|
|
|
|
bzero(&x2apic, sizeof(x2apic));
|
|
x2apic.cpuid = vcpu;
|
|
x2apic.state = state;
|
|
|
|
error = ioctl(ctx->fd, VM_SET_X2APIC_STATE, &x2apic);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* From Intel Vol 3a:
|
|
* Table 9-1. IA-32 Processor States Following Power-up, Reset or INIT
|
|
*/
|
|
int
|
|
vcpu_reset(struct vmctx *vmctx, int vcpu)
|
|
{
|
|
int error;
|
|
uint64_t rflags, rip, cr0, cr4, zero, desc_base, rdx;
|
|
uint32_t desc_access, desc_limit;
|
|
uint16_t sel;
|
|
|
|
zero = 0;
|
|
|
|
rflags = 0x2;
|
|
error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RFLAGS, rflags);
|
|
if (error)
|
|
goto done;
|
|
|
|
rip = 0xfff0;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RIP, rip)) != 0)
|
|
goto done;
|
|
|
|
cr0 = CR0_NE;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR0, cr0)) != 0)
|
|
goto done;
|
|
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR3, zero)) != 0)
|
|
goto done;
|
|
|
|
cr4 = 0;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR4, cr4)) != 0)
|
|
goto done;
|
|
|
|
/*
|
|
* CS: present, r/w, accessed, 16-bit, byte granularity, usable
|
|
*/
|
|
desc_base = 0xffff0000;
|
|
desc_limit = 0xffff;
|
|
desc_access = 0x0093;
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_CS,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
sel = 0xf000;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CS, sel)) != 0)
|
|
goto done;
|
|
|
|
/*
|
|
* SS,DS,ES,FS,GS: present, r/w, accessed, 16-bit, byte granularity
|
|
*/
|
|
desc_base = 0;
|
|
desc_limit = 0xffff;
|
|
desc_access = 0x0093;
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_SS,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_DS,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_ES,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_FS,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GS,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
sel = 0;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_SS, sel)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_DS, sel)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_ES, sel)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_FS, sel)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_GS, sel)) != 0)
|
|
goto done;
|
|
|
|
/* General purpose registers */
|
|
rdx = 0xf00;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RAX, zero)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBX, zero)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RCX, zero)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDX, rdx)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSI, zero)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDI, zero)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBP, zero)) != 0)
|
|
goto done;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSP, zero)) != 0)
|
|
goto done;
|
|
|
|
/* GDTR, IDTR */
|
|
desc_base = 0;
|
|
desc_limit = 0xffff;
|
|
desc_access = 0;
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GDTR,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error != 0)
|
|
goto done;
|
|
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_IDTR,
|
|
desc_base, desc_limit, desc_access);
|
|
if (error != 0)
|
|
goto done;
|
|
|
|
/* TR */
|
|
desc_base = 0;
|
|
desc_limit = 0xffff;
|
|
desc_access = 0x0000008b;
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_TR, 0, 0, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
sel = 0;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_TR, sel)) != 0)
|
|
goto done;
|
|
|
|
/* LDTR */
|
|
desc_base = 0;
|
|
desc_limit = 0xffff;
|
|
desc_access = 0x00000082;
|
|
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_LDTR, desc_base,
|
|
desc_limit, desc_access);
|
|
if (error)
|
|
goto done;
|
|
|
|
sel = 0;
|
|
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_LDTR, 0)) != 0)
|
|
goto done;
|
|
|
|
/* XXX cr2, debug registers */
|
|
|
|
error = 0;
|
|
done:
|
|
return (error);
|
|
}
|