mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 10:48:02 +00:00
f7a884cb01
cpuid detection may have picked up a more specific guest type already,
and a follow-up check of smbios vendor/product may erroneously blow
away the previously detected type.
This reportedly fixes the boot under Hyper-V, which advertises an
smbios.system.product of "Virtual Machine."
PR: 270239
Reviewed by: imp, kib (both earlier version, same concept)
Fixes: 2fee875629 ("abstract out the vm detection via smbios..")
Differential Revision: https://reviews.freebsd.org/D39140
113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
/*-
|
|
* Copyright 2014 John Baldwin
|
|
* Copyright 2019 Stephen J. Kiernan
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS 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.
|
|
*
|
|
* from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <dev/smbios/smbios.h>
|
|
|
|
static const struct {
|
|
const char *vm_bname;
|
|
int vm_guest;
|
|
} vm_bnames[] = {
|
|
{ "QEMU", VM_GUEST_VM }, /* QEMU */
|
|
{ "Plex86", VM_GUEST_VM }, /* Plex86 */
|
|
{ "Bochs", VM_GUEST_VM }, /* Bochs */
|
|
{ "Xen", VM_GUEST_XEN }, /* Xen */
|
|
{ "BHYVE", VM_GUEST_BHYVE }, /* bhyve */
|
|
{ "Seabios", VM_GUEST_KVM }, /* KVM */
|
|
};
|
|
|
|
static const struct {
|
|
const char *vm_pname;
|
|
int vm_guest;
|
|
} vm_pnames[] = {
|
|
{ "VMware Virtual Platform", VM_GUEST_VMWARE },
|
|
{ "Virtual Machine", VM_GUEST_VM }, /* Microsoft VirtualPC */
|
|
{ "QEMU Virtual Machine", VM_GUEST_VM },
|
|
{ "VirtualBox", VM_GUEST_VBOX },
|
|
{ "Parallels Virtual Platform", VM_GUEST_PARALLELS },
|
|
{ "KVM", VM_GUEST_KVM },
|
|
};
|
|
|
|
void
|
|
identify_hypervisor_smbios(void)
|
|
{
|
|
char *p;
|
|
int i;
|
|
|
|
/*
|
|
* Some platforms, e.g., amd64, have other ways of detecting what kind
|
|
* of hypervisor we may be running under. Make sure we don't clobber a
|
|
* more specific vm_guest that's been previously detected.
|
|
*/
|
|
if (vm_guest != VM_GUEST_NO && vm_guest != VM_GUEST_VM)
|
|
return;
|
|
|
|
/*
|
|
* XXX: Some of these entries may not be needed since they were
|
|
* added to FreeBSD before the checks above.
|
|
*/
|
|
p = kern_getenv("smbios.bios.vendor");
|
|
if (p != NULL) {
|
|
for (i = 0; i < nitems(vm_bnames); i++)
|
|
if (strcmp(p, vm_bnames[i].vm_bname) == 0) {
|
|
vm_guest = vm_bnames[i].vm_guest;
|
|
/* If we have a specific match, return */
|
|
if (vm_guest != VM_GUEST_VM) {
|
|
freeenv(p);
|
|
return;
|
|
}
|
|
/*
|
|
* We are done with bnames, but there might be
|
|
* a more specific match in the pnames
|
|
*/
|
|
break;
|
|
}
|
|
freeenv(p);
|
|
}
|
|
p = kern_getenv("smbios.system.product");
|
|
if (p != NULL) {
|
|
for (i = 0; i < nitems(vm_pnames); i++)
|
|
if (strcmp(p, vm_pnames[i].vm_pname) == 0) {
|
|
vm_guest = vm_pnames[i].vm_guest;
|
|
freeenv(p);
|
|
return;
|
|
}
|
|
freeenv(p);
|
|
}
|
|
}
|