On Sun, Nov 15, 2020 at 06:20:52PM +0000, Gabriel Garcia wrote:
> Hi,
>
> I would like to run OpenBSD as stated on the subject - I have been able,
> however, to run it successfully with "-cpu Opteron_G2-v1", but I would
> rather use "-cpu host" instead. Also note that on an Intel host, OpenBSD
> appears to work successfully on the same Linux base.
>
> qemu invocation that yields a trap:
> qemu-system-x86_64 -enable-kvm -machine q35 -cpu host,-nodeid-msr,-vmx-msr-bitmap,-popcnt,-tsc-deadline,-mmxext,-fxsr-opt,-pdpe1gb,-rdtscp,-3dnow,-3dnowext,-cmp-legacy,-svm,-cr8legacy,-abm,-sse4a,-misalignsse,-3dnowprefetch,-osvw,-amd-no-ssb
> \
>
> -drive file=/path/to/raw.img,format=raw,if=virtio \
>
> -m 512M \
>
> -display curses
>
> (note that `-cpu host` without deactivating any flag also yields a trap)
Try -cpu kvm64.
>
> dmesg output:
> ddb> dmesg
>
> OpenBSD 6.8 (GENERIC) #1: Tue Nov 3 09:04:47 MST 2020
>
>
> root@syspatch-68-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
>
> real mem = 519954432 (495MB)
>
> avail mem = 489299968 (466MB)
>
> random: good seed from bootblocks
>
> mpath0 at root
>
> scsibus0 at mpath0: 256 targets
>
> mainbus0 at root
>
> bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xf5aa0 (9 entries)
>
> bios0: vendor SeaBIOS version
> "?-20190711_202441-buildvm-armv7-10.arm.fedorapro
>
> ject.org-2.fc31" date 04/01/2014
>
> bios0: QEMU Standard PC (Q35 + ICH9, 2009)
>
> acpi0 at bios0: ACPI 3.0
>
> acpi0: sleep states S3 S4 S5
>
> acpi0: tables DSDT FACP APIC HPET MCFG WAET
>
> acpi0: wakeup devices
>
> acpitimer0 at acpi0: 3579545 Hz, 24 bits
>
> acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
>
> cpu0 at mainbus0: apid 0 (boot processor)
>
> cpu0: AMD Turion(tm) II Neo N40L Dual-Core Processor, 1497.89 MHz, 10-06-03
>
> cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,
> MMX,FXSR,SSE,SSE2,SSE3,CX16,x2APIC,POPCNT,DEADLINE,HV,NXE,MMXX,FFXSR,PAGE1GB,
> RDTSCP,LONG,3DNOW2,3DNOW,LAHF,CMPLEG,SVM,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,
>
> SSBDNR
>
> cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB
> 64b/line 1
>
> 6-way L2 cache, 16MB 64b/line 16-way L3 cache
>
> cpu0: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
>
> cpu0: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
>
> kernel: protection fault trap, code=0
>
> Stopped at amd64_errata_setmsr+0x4e: wrmsr
>
>
> Contents of CPU registers:
> ddb> show registers
>
> rdi 0x9c5a203a
>
> rsi 0xffffffff820ff920 errata+0xe0
>
> rbp 0xffffffff824c5740 end+0x2c5740
>
> rbx 0x18
>
> rdx 0
>
> rcx 0xc0011029
>
> rax 0x3
>
> r8 0xffffffff824c55a8 end+0x2c55a8
>
> r9 0
>
> r10 0xbdf7dabff85d847b
>
> r11 0x51e076fef1dcfa7b
>
> r12 0
>
> r13 0
>
> r14 0xffffffff820ff940 acpihid_ca
>
> r15 0xffffffff820ff920 errata+0xe0
>
> rip 0xffffffff81bc6ede amd64_errata_setmsr+0x4e
>
> cs 0x8
>
> rflags 0x10256 __ALIGN_SIZE+0xf256
>
> rsp 0xffffffff824c5730 end+0x2c5730
>
> ss 0x10
>
> amd64_errata_setmsr+0x4e: wrmsr
>
>
>
> Working system dmesg (only change from invocation above is "-cpu
> Opteron_G2-v1"):
> OpenBSD 6.8 (GENERIC) #1: Tue Nov 3 09:04:47 MST 2020
>
>
> root@syspatch-68-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
>
> real mem = 519950336 (495MB)
>
> avail mem = 489304064 (466MB)
>
> random: good seed from bootblocks
>
> mpath0 at root
>
> scsibus0 at mpath0: 256 targets
>
> mainbus0 at root
>
> bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xf5aa0 (9 entries)
>
> bios0: vendor SeaBIOS version
> "?-20190711_202441-buildvm-armv7-10.arm.fedoraproject.org-2.fc31" date
> 04/01/2014
>
> bios0: QEMU Standard PC (Q35 + ICH9, 2009)
>
> acpi0 at bios0: ACPI 3.0
>
> acpi0: sleep states S3 S4 S5
>
> acpi0: tables DSDT FACP APIC HPET MCFG WAET
>
> acpi0: wakeup devices
>
> acpitimer0 at acpi0: 3579545 Hz, 24 bits
>
> acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
>
> cpu0 at mainbus0: apid 0 (boot processor)
>
> cpu0: AMD Opteron 22xx (Gen 2 Class Opteron), 1497.89 MHz, 0f-06-01
>
> cpu0:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,
> CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,CX16,x2APIC,HV,NXE,LONG,LAHF
>
> cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB
> 64b/line 16-way L2 cache, 16MB 64b/line 16-way L3 cache
>
> cpu0: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
>
> cpu0: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
>
> cpu0: smt 0, core 0, package 0
>
> mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
>
> cpu0: apic clock running at 999MHz
>
> ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins
>
> acpihpet0 at acpi0: 100000000 Hz
>
> acpimcfg0 at acpi0
>
> acpimcfg0: addr 0xb0000000, bus 0-255
>
> acpiprt0 at acpi0: bus 0 (PCI0)
>
> "ACPI0006" at acpi0 not configured
>
> acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
>
> acpicmos0 at acpi0
>
> "PNP0A06" at acpi0 not configured
>
> "PNP0A06" at acpi0 not configured
>
> "QEMU0002" at acpi0 not configured
>
> "ACPI0010" at acpi0 not configured
>
> acpicpu0 at acpi0: C1(@1 halt!)
>
> pvbus0 at mainbus0: KVM
>
> pvclock0 at pvbus0
>
> pci0 at mainbus0 bus 0
>
> pchb0 at pci0 dev 0 function 0 "Intel 82G33 Host" rev 0x00
>
> vga1 at pci0 dev 1 function 0 "Bochs VGA" rev 0x02
>
> wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
>
> wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
>
> virtio0 at pci0 dev 2 function 0 "Qumranet Virtio Network" rev 0x00
>
> vio0 at virtio0: address 9a:00:00:00:00:00
>
> virtio0: msix shared
>
> xhci0 at pci0 dev 3 function 0 vendor "Red Hat", unknown product 0x000d rev
> 0x01: apic 0 int 23, xHCI 0.0
>
> usb0 at xhci0: USB revision 3.0
>
> uhub0 at usb0 configuration 1 interface 0 "Red Hat xHCI root hub" rev
> 3.00/1.00 addr 1
>
> virtio1 at pci0 dev 4 function 0 "Qumranet Virtio Storage" rev 0x00
>
> vioblk0 at virtio1
>
> scsibus1 at vioblk0: 1 targets
>
> sd0 at scsibus1 targ 0 lun 0: <VirtIO, Block Device, >
>
> sd0: 51200MB, 512 bytes/sector, 104857600 sectors
>
> virtio1: msix shared
>
> pcib0 at pci0 dev 31 function 0 "Intel 82801IB LPC" rev 0x02
>
> ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x02: msi, AHCI 1.0
>
> ahci0: port 2: 1.5Gb/s
>
> scsibus2 at ahci0: 32 targets
>
> cd0 at scsibus2 targ 2 lun 0: <QEMU, QEMU DVD-ROM, 2.5+> removable
>
> ichiic0 at pci0 dev 31 function 3 "Intel 82801I SMBus" rev 0x02: apic 0 int
> 16
>
> iic0 at ichiic0
>
> isa0 at pcib0
>
> isadma0 at isa0
>
> com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
>
> pckbc0 at isa0 port 0x60/5 irq 1 irq 12
>
> pckbd0 at pckbc0 (kbd slot)
>
> wskbd0 at pckbd0: console keyboard, using wsdisplay0
>
> pms0 at pckbc0 (aux slot)
>
> wsmouse0 at pms0 mux 0
>
> pcppi0 at isa0 port 0x61
>
> spkr0 at pcppi0
>
> lpt0 at isa0 port 0x378/4 irq 7
>
> axe0 at uhub0 port 5 configuration 1 interface 0 "ASIX Electronics AX88772"
> rev 2.00/0.01 addr 2
>
> axe0: AX88772, address 00:50:b6:0b:cf:f0
>
> ukphy0 at axe0 phy 16: Generic IEEE 802.3u media interface, rev. 1: OUI
> 0x000ec6, model 0x0006
>
> vscsi0 at root
>
> scsibus3 at vscsi0: 256 targets
>
> softraid0 at root
>
> scsibus4 at softraid0: 256 targets
>
> root on sd0a (50fd7af99e5255c1.a) swap on sd0b dump on sd0b
>
>
> I have been trying to disable features on qemu invocation, changing the
> "-machine" parameter and unloading the Linux msr module, without too much
> success. Folks in #qemu suggested the workaround I'm using and advised that
> the problem may be a CPU feature that I ought to disable, somehow.
>
> I know about https://www.openbsd.org/lyrics.html#62 (No QEMU, only DDB) :-)
> However, if anybody has bumped into this and can successfully run OpenBSD as
> a guest on this type of hardware, I would be grateful if they could throw me
> a few ideas for me to try out.
>
> Thanks!
>
>
> Gabriel
>
--
Juan Francisco Cantero Hurtado http://juanfra.info
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