I just upgraded to current/amd64. Nothing special here, it's a PC. Only wanted to note that the new MELTDOWN feature of the CPU is correctly recognized.
Jan OpenBSD 6.2-current (GENERIC.MP) #0: Mon Feb 26 15:04:31 CET 2018 h...@biblio.stare.cz:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 8486649856 (8093MB) avail mem = 8222433280 (7841MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf0100 (36 entries) bios0: vendor Award Software International, Inc. version "F2" date 04/20/2011 bios0: Gigabyte Technology Co., Ltd. Z68MX-UD2H-B3 acpi0 at bios0: rev 0 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP HPET MCFG ASPT SSPT EUDS MATS TAMG APIC SSDT MATS acpi0: wakeup devices PEX0(S5) PEX1(S5) PEX2(S5) PEX3(S5) PEX4(S5) PEX5(S5) PEX6(S5) PEX7(S5) HUB0(S5) UAR1(S3) USBE(S3) USE2(S3) AZAL(S5) PCI0(S5) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpimcfg0 at acpi0 addr 0xf4000000, bus 0-63 acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz, 3193.17 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT,MELTDOWN cpu0: 256KB 64b/line 8-way L2 cache acpihpet0: recalibrated TSC frequency 3092989561 Hz cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 99MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.1, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz, 3192.75 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT,MELTDOWN cpu1: 256KB 64b/line 8-way L2 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 4 (application processor) cpu2: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz, 3192.75 MHz cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT,MELTDOWN cpu2: 256KB 64b/line 8-way L2 cache cpu2: smt 0, core 2, package 0 cpu3 at mainbus0: apid 6 (application processor) cpu3: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz, 3192.75 MHz cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,SENSOR,ARAT,MELTDOWN cpu3: 256KB 64b/line 8-way L2 cache cpu3: smt 0, core 3, package 0 ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins , remapped to apid 2 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus 1 (PEG0) acpiprt2 at acpi0: bus -1 (PEG1) acpiprt3 at acpi0: bus 2 (PEX0) acpiprt4 at acpi0: bus -1 (PEX1) acpiprt5 at acpi0: bus -1 (PEX2) acpiprt6 at acpi0: bus -1 (PEX3) acpiprt7 at acpi0: bus 3 (PEX4) acpiprt8 at acpi0: bus 4 (PEX5) acpiprt9 at acpi0: bus 5 (PEX6) acpiprt10 at acpi0: bus 6 (PEX7) acpicpu0 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), C1(1000@1 mwait.1), PSS acpicpu1 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), C1(1000@1 mwait.1), PSS acpicpu2 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), C1(1000@1 mwait.1), PSS acpicpu3 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), C1(1000@1 mwait.1), PSS acpibtn0 at acpi0: PWRB "ICD0001" at acpi0 not configured "pnp0c14" at acpi0 not configured "INT3F0D" at acpi0 not configured cpu0: Enhanced SpeedStep 3193 MHz: speeds: 3301, 3300, 3200, 3100, 3000, 2900, 2800, 2700, 2600, 2500, 2400, 2300, 2200, 2100, 2000, 1900, 1800, 1700, 1600 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Core 2G Host" rev 0x09 ppb0 at pci0 dev 1 function 0 "Intel Core 2G PCIE" rev 0x09: msi pci1 at ppb0 bus 1 em0 at pci1 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 68:05:ca:33:6a:61 inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 2000" rev 0x09 drm0 at inteldrm0 inteldrm0: msi inteldrm0: 1920x1080, 32bpp wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation) wsdisplay0: screen 1-5 added (std, vt100 emulation) "Intel 6 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured ehci0 at pci0 dev 26 function 0 "Intel 6 Series USB" rev 0x05: apic 2 int 18 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 azalia0 at pci0 dev 27 function 0 "Intel 6 Series HD Audio" rev 0x05: msi azalia0: codecs: Realtek/0x0889, Intel/0x2805, using Realtek/0x0889 audio0 at azalia0 ppb1 at pci0 dev 28 function 0 "Intel 6 Series PCIE" rev 0xb5: msi pci2 at ppb1 bus 2 em1 at pci2 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 00:1b:21:72:9d:bc ppb2 at pci0 dev 28 function 4 "Intel 6 Series PCIE" rev 0xb5: msi pci3 at ppb2 bus 3 pciide0 at pci3 dev 0 function 0 vendor "Marvell", unknown product 0x917a rev 0x11: DMA (unsupported), channel 0 configured to native-PCI, channel 1 configured to native-PCI pciide0: using apic 2 int 16 for native-PCI interrupt pciide0: channel 0 ignored (not responding; disabled or no drives?) pciide0: channel 1 ignored (not responding; disabled or no drives?) ppb3 at pci0 dev 28 function 5 "Intel 6 Series PCIE" rev 0xb5: msi pci4 at ppb3 bus 4 xhci0 at pci4 dev 0 function 0 "Etron EJ168 xHCI" rev 0x01: msi usb1 at xhci0: USB revision 3.0 uhub1 at usb1 configuration 1 interface 0 "Etron xHCI root hub" rev 3.00/1.00 addr 1 ppb4 at pci0 dev 28 function 6 "Intel 6 Series PCIE" rev 0xb5: msi pci5 at ppb4 bus 5 re0 at pci5 dev 0 function 0 "Realtek 8168" rev 0x06: RTL8168E/8111E-VL (0x2c80), msi, address 50:e5:49:39:0e:aa rgephy0 at re0 phy 7: RTL8169S/8110S/8211 PHY, rev. 5 ppb5 at pci0 dev 28 function 7 "Intel 6 Series PCIE" rev 0xb5: msi pci6 at ppb5 bus 6 xhci1 at pci6 dev 0 function 0 "Etron EJ168 xHCI" rev 0x01: msi usb2 at xhci1: USB revision 3.0 uhub2 at usb2 configuration 1 interface 0 "Etron xHCI root hub" rev 3.00/1.00 addr 1 ehci1 at pci0 dev 29 function 0 "Intel 6 Series USB" rev 0x05: apic 2 int 23 usb3 at ehci1: USB revision 2.0 uhub3 at usb3 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb6 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0xa5 pci7 at ppb6 bus 7 pcib0 at pci0 dev 31 function 0 "Intel Z68 LPC" rev 0x05 ahci0 at pci0 dev 31 function 2 "Intel 6 Series AHCI" rev 0x05: msi, AHCI 1.3 ahci0: port 0: 1.5Gb/s ahci0: port 1: 3.0Gb/s ahci0: port 2: 3.0Gb/s ahci0: port 3: 3.0Gb/s ahci0: port 4: 3.0Gb/s scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, ST380811AS, 3.AA> SCSI3 0/direct fixed t10.ATA_ST380811AS_5PS1056R sd0: 76319MB, 512 bytes/sector, 156301488 sectors sd1 at scsibus1 targ 1 lun 0: <ATA, WDC WD5000AADS-0, 01.0> SCSI3 0/direct fixed naa.50014ee25ba41f56 sd1: 476940MB, 512 bytes/sector, 976773168 sectors sd2 at scsibus1 targ 2 lun 0: <ATA, SAMSUNG HM251JJ, 2AA0> SCSI3 0/direct fixed naa.50f0000003105140 sd2: 238475MB, 512 bytes/sector, 488397168 sectors sd3 at scsibus1 targ 3 lun 0: <ATA, WDC WD6400BPVT-0, 01.0> SCSI3 0/direct fixed naa.50014ee25979e46a sd3: 610480MB, 512 bytes/sector, 1250263728 sectors sd4 at scsibus1 targ 4 lun 0: <ATA, WDC WD10TPVT-00H, 01.0> SCSI3 0/direct fixed naa.50014ee2aed8deca sd4: 953869MB, 512 bytes/sector, 1953525168 sectors ichiic0 at pci0 dev 31 function 3 "Intel 6 Series SMBus" rev 0x05: apic 2 int 18 iic0 at ichiic0 iic0: addr 0x4e 03=c7 04=c7 06=0d 07=01 08=0f 0c=ae 0d=fa 0e=c6 0f=88 12=ff 13=ff 20=14 26=03 28=83 29=12 2a=23 2c=10 2f=e4 3c=28 3e=01 47=99 71=ff 80=ff 82=ff 84=ff 86=ff 90=ff 91=ff 92=ff 93=ff 94=ff 95=ff 96=ff 98=ff 99=ff 9a=ff 9b=ff 9c=ff 9d=ff 9e=ff a0=ff a1=ff a2=ff a3=ff a4=ff a5=ff a6=ff a8=ff a9=ff aa=ff ab=ff ac=ff ad=ff ae=ff f0=ff f1=30 f2=2c f3=07 f4=e5 f5=3f f6=0c f7=01 f8=3c words 00=0000 01=0000 02=00c7 03=c7c7 04=c700 05=000d 06=0d01 07=010f spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-10600 spdmem1 at iic0 addr 0x51: 4GB DDR3 SDRAM PC3-10600 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 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 it0 at isa0 port 0x2e/2: IT8728F rev 1, EC port 0x290 vmm0 at mainbus0: VMX/EPT uhub4 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 uplcom0 at uhub4 port 3 configuration 1 interface 0 "Prolific Technology Inc. USB-Serial Controller" rev 1.10/3.00 addr 3 ucom0 at uplcom0 uhidev0 at uhub4 port 4 configuration 1 interface 0 "Logitech USB Optical Mouse" rev 2.00/54.00 addr 4 uhidev0: iclass 3/1 ums0 at uhidev0: 8 buttons, Z and W dir wsmouse0 at ums0 mux 0 uhub5 at uhub3 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets root on sd0a (dd3e6921954c301e.a) swap on sd0b dump on sd0b