On 5 April 2017 at 13:07, Theo de Raadt <dera...@openbsd.org> wrote:
>
> > cpu0: Intel(R) Xeon(R) CPU E5-1620 v3 @ 3.50GHz, 3491.87 MHz
> > cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,
> CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT,PBE,SSE3,
> PCLMUL,DTES64,DS-CPL,SSSE3,SDBG,FMA3,CX16,xTPR,PCID,DCA,
> SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,
> NXE,PAGE1GB,LONG,LAHF,ABM,ITSC,FSGSBASE,BMI1,AVX2,BMI2,ERMS,INVPCID,ARAT
> > cpu0: 256KB 64b/line 8-way L2 cache
>
> (see SDBG in the long line above?)
>
> In that case the emulation of that cpu must support the feature it
> claims to support, either by having the hardware do it, or by having
> the vm code emulate it. It must emulate the MSR's associated with
> the feature.
>
> Or, not make the claim.
>
> bhyve appears to be passing down feature bits from the host cpu
> without sanitizing them.
>
> I wonder what other features they are passing down.... some of them
> are not really safe........
>
Just a follow-up. New hardware has arrived. This is not a wide ranging
issue and appears to only affect some models of CPUs. Below is the output
from a bhyve guest running on an Atom C2758 SoC, no modification was made
to the bhyve startup:
OpenBSD 6.1 (GENERIC.MP) #0: Wed Apr 5 08:47:48 AEST 2017
mrbuil...@cybermen.ar18.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 1056964608 (1008MB)
avail mem = 1021227008 (973MB)
warning: no entropy supplied by boot loader
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xf101f (10 entries)
bios0: vendor BHYVE version "1.00" date 03/14/2014
bios0: bhyve BHYVE
acpi0 at bios0: rev 2
acpi0: sleep states S5
acpi0: tables DSDT APIC FACP HPET MCFG
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Atom(TM) CPU C2758 @ 2.40GHz, 2400.13 MHz
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS
H,MMX,FXSR,SSE,SSE2,SS,HTT,PBE,SSE3,PCLMUL,DTES64,DS-CPL,SSSE3,CX16,xTPR,SSE4
.1,SSE4.2,MOVBE,POPCNT,AES,RDRAND,HV,NXE,LONG,LAHF,3DNOWP,ITSC,ERMS,ARAT
cpu0: 1MB 64b/line 16-way L2 cache
cpu0: TSC frequency 2400132000 Hz
cpu0: smt 0, core 0, package 0
mtrr: CPU supports MTRRs but not enabled by BIOS
cpu0: apic clock running at 134MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Atom(TM) CPU C2758 @ 2.40GHz, 2408.75 MHz
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS
H,MMX,FXSR,SSE,SSE2,SS,HTT,PBE,SSE3,PCLMUL,DTES64,DS-CPL,SSSE3,CX16,xTPR,SSE4
.1,SSE4.2,MOVBE,POPCNT,AES,RDRAND,HV,NXE,LONG,LAHF,3DNOWP,ITSC,ERMS,ARAT
cpu1: 1MB 64b/line 16-way L2 cache
cpu1: smt 0, core 0, package 1
ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins
acpihpet0 at acpi0: 10000000 Hz
acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255
acpiprt0 at acpi0: bus 0 (PC00)
"PNP0303" at acpi0 not configured
"PNP0F13" at acpi0 not configured
"PNP0501" at acpi0 not configured
"PNP0501" at acpi0 not configured
pvbus0 at mainbus0: bhyve
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 unknown vendor 0x1275 product 0x1275 rev 0x00
ahci0 at pci0 dev 4 function 0 "Intel 82801H AHCI" rev 0x00: apic 0 int 16,
AHCI 1.3
ahci0: port 0: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, BHYVE SATA DISK, 001> SCSI3 0/direct
fixed t10.ATA_BHYVE_SATA_DISK_BHYVE-ABF0-1147-4A70
sd0: 9216MB, 512 bytes/sector, 18874368 sectors, thin
virtio0 at pci0 dev 5 function 0 "Qumranet Virtio Network" rev 0x00
vio0 at virtio0: address 00:a0:98:81:81:c6
virtio0: msix shared
pcib0 at pci0 dev 31 function 0 "Intel 82371SB ISA" rev 0x00
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: console
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0 mux 1
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
/dev/ksyms: Symbol table not valid.
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (1eb522b194b459a8.a) swap on sd0b dump on sd0b
------
By applying the -w flag for bhyve start on the original machine, 6.1 starts
as expected:
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
Copyright (c) 1995-2017 OpenBSD. All rights reserved.
https://www.OpenBSD.org
OpenBSD 6.1 (RAMDISK_CD) #19: Sat Apr 1 13:49:18 MDT 2017
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/RAMDISK_CD
real mem = 251658240 (240MB)
avail mem = 240402432 (229MB)
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xf101f (10 entries)
bios0: vendor BHYVE version "1.00" date 03/14/2014
bios0: bhyve BHYVE
acpi0 at bios0: rev 2
acpi0: tables DSDT APIC FACP HPET MCFG
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Xeon(R) CPU E5-1620 v3 @ 3.50GHz, 3491.79 MHz
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS
H,MMX,FXSR,SSE,SSE2,SS,HTT,PBE,SSE3,PCLMUL,DTES64,DS-CPL,SSSE3,SDBG,FMA3,CX16
,xTPR,PCID,DCA,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PA
GE1GB,LONG,LAHF,ABM,ITSC,FSGSBASE,BMI1,AVX2,BMI2,ERMS,INVPCID,ARAT
cpu0: 256KB 64b/line 8-way L2 cache
rdmsr to register 0xc80 on vcpu 0
cpu0: TSC frequency 3491790470 Hz
cpu0: apic clock running at 134MHz
cpu at mainbus0: not configured
ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins
acpiprt0 at acpi0: bus 0 (PC00)
"PNP0303" at acpi0 not configured
"PNP0F13" at acpi0 not configured
"PNP0501" at acpi0 not configured
"PNP0501" at acpi0 not configured
pvbus0 at mainbus0: bhyve
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 unknown vendor 0x1275 product 0x1275 rev 0x00
ahci0 at pci0 dev 3 function 0 "Intel 82801H AHCI" rev 0x00: apic 0 int 16,
AHCI 1.3
ahci0: port 0: 6.0Gb/s
scsibus0 at ahci0: 32 targets
cd0 at scsibus0 targ 0 lun 0: <BHYVE, BHYVE DVD-ROM, 001> ATAPI 5/cdrom
removable
ahci1 at pci0 dev 4 function 0 "Intel 82801H AHCI" rev 0x00: apic 0 int 17,
AHCI 1.3
ahci1: port 0: 6.0Gb/s
scsibus1 at ahci1: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, BHYVE SATA DISK, 001> SCSI3 0/direct
fixed t10.ATA_BHYVE_SATA_DISK_BHYVE-5DBA-21D5-F87D
sd0: 9216MB, 512 bytes/sector, 18874368 sectors, thin
virtio0 at pci0 dev 5 function 0 "Qumranet Virtio Network" rev 0x00
vio0 at virtio0: address 00:a0:98:51:e2:c1
virtio0: msix shared
"Intel 82371SB ISA" rev 0x00 at pci0 dev 31 function 0 not configured
isa0 at mainbus0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: console
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0 mux 1
softraid0 at root
scsibus2 at softraid0: 256 targets
root on rd0a swap on rd0b dump on rd0b
erase ^?, werase ^W, kill ^U, intr ^C, status ^T
Welcome to the OpenBSD/amd64 6.1 installation program.
(I)nstall, (U)pgrade, (A)utoinstall or (S)hell?
