hi
i upgrade from an native 6.4 beta installation , no problems at all.
/ 29>dmesg
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OpenBSD 6.4 (GENERIC.MP) #0: Sat Oct 13 03:52:37 UTC 2018
visa@octeon:/usr/src/sys/arch/octeon/compile/GENERIC.MP
real mem = 1073741824 (1024MB)
avail mem = 1038041088 (989MB)
mainbus0 at root: board 20300 rev 1.20
cpu0 at mainbus0: CN70xx/CN71xx CPU rev 0.2 1000 MHz, CN70xx/CN71xx FPU
rev 0.0
cpu0: cache L1-I 78KB 39 way D 32KB 32 way, L2 1024KB 8 way
cpu1 at mainbus0: CN70xx/CN71xx CPU rev 0.2 1000 MHz, CN70xx/CN71xx FPU
rev 0.0
cpu1: cache L1-I 78KB 39 way D 32KB 32 way, L2 1024KB 8 way
cpu2 at mainbus0: CN70xx/CN71xx CPU rev 0.2 1000 MHz, CN70xx/CN71xx FPU
rev 0.0
cpu2: cache L1-I 78KB 39 way D 32KB 32 way, L2 1024KB 8 way
cpu3 at mainbus0: CN70xx/CN71xx CPU rev 0.2 1000 MHz, CN70xx/CN71xx FPU
rev 0.0
cpu3: cache L1-I 78KB 39 way D 32KB 32 way, L2 1024KB 8 way
clock0 at mainbus0: int 5
octcrypto0 at mainbus0
iobus0 at mainbus0
simplebus0 at iobus0: "soc"
octciu0 at simplebus0
octcib0 at simplebus0: max-bits 23
octcib1 at simplebus0: max-bits 12
octcib2 at simplebus0: max-bits 6
octcib3 at simplebus0: max-bits 15
octcib4 at simplebus0: max-bits 4
octcib5 at simplebus0: max-bits 11
octcib6 at simplebus0: max-bits 11
cn30xxsmi0 at simplebus0
octxctl0 at simplebus0: DWC3 rev 0x250a
xhci0 at octxctl0, xHCI 1.0
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Generic xHCI root hub" rev
3.00/1.00 addr 1
octxctl1 at simplebus0: DWC3 rev 0x250a
xhci1 at octxctl1, xHCI 1.0
usb1 at xhci1: USB revision 3.0
uhub1 at usb1 configuration 1 interface 0 "Generic xHCI root hub" rev
3.00/1.00 addr 1
com0 at simplebus0: ns16550a, 64 byte fifo
com0: console
com1 at simplebus0: ns16550a, 64 byte fifo
com1: probed fifo depth: 0 bytes
octmmc0 at simplebus0
sdmmc0 at octmmc0: 8-bit, mmc high-speed
sdmmc1 at octmmc0: 8-bit, mmc high-speed
octrng0 at iobus0 base 0x1400000000000 irq 0
cn30xxgmx0 at iobus0 base 0x1180008000000
cnmac0 at cn30xxgmx0: SGMII, address fc:ec:da:40:fa:42
ukphy0 at cnmac0 phy 4: Generic IEEE 802.3u media interface, rev. 2: OUI
0x0001c1, model 0x000c
cnmac1 at cn30xxgmx0: SGMII, address fc:ec:da:40:fa:43
ukphy1 at cnmac1 phy 5: Generic IEEE 802.3u media interface, rev. 2: OUI
0x0001c1, model 0x000c
cnmac2 at cn30xxgmx0: SGMII, address fc:ec:da:40:fa:44
ukphy2 at cnmac2 phy 6: Generic IEEE 802.3u media interface, rev. 2: OUI
0x0001c1, model 0x000c
cnmac3 at cn30xxgmx0: SGMII, address fc:ec:da:40:fa:45
ukphy3 at cnmac3 phy 7: Generic IEEE 802.3u media interface, rev. 2: OUI
0x0001c1, model 0x000c
cn30xxgmx1 at iobus0 base 0x1180010000000
cnmac4 at cn30xxgmx1: SGMII, address fc:ec:da:40:fa:46
ukphy4 at cnmac4 phy 8: Generic IEEE 802.3u media interface, rev. 0: OUI
0x0001c1, model 0x0027
cnmac5 at cn30xxgmx1: SGMII, address fc:ec:da:40:fa:47
ukphy5 at cnmac5 phy 9: Generic IEEE 802.3u media interface, rev. 0: OUI
0x0001c1, model 0x0027
/dev/ksyms: Symbol table not valid.
umass0 at uhub0 port 2 configuration 1 interface 0 "Generic USB3.0 Card
Reader" rev 3.00/15.32 addr 2
umass0: using SCSI over Bulk-Only
scsibus0 at umass0: 2 targets, initiator 0
sd0 at scsibus0 targ 1 lun 0: <Generic, STORAGE DEVICE, 1532> SCSI4
0/direct removable serial.05e30749000000001532
sd0: 61056MB, 512 bytes/sector, 125042688 sectors
sdmmc1: can't enable card
scsibus1 at sdmmc0: 2 targets, initiator 0
sd1 at scsibus1 targ 1 lun 0: <Sandisk, SEM04G, 0000> SCSI2 0/direct
removable
sd1: 3776MB, 512 bytes/sector, 7733248 sectors
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
boot device: sd0
root on sd0a (1e8c6ddb499f7a0a.a) swap on sd0b dump on sd0b
WARNING: No TOD clock, believing file system.
WARNING: CHECK AND RESET THE DATE!
20:25:13 Mon Aug 20
holger