On Mon, Oct 22, 2018 at 07:09:21AM +0300, snikolov wrote: > Dear All, > > I have managed to configure and get the output of the serial console on > KVM and here is the output (with different CPU type only the name of > the CPU changes) : > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > >> OpenBSD/amd64 CDBOOT 3.40 > boot> > cannot open cd0a:/etc/random.seed: No such file or directory > booting cd0a:/6.4/amd64/bsd.rd: 3511114+1500160+3892040+0+598016 > [372715+111+441072+293323]=0xa208a0 > entry point at 0x1000158 > Copyright (c) 1982, 1986, 1989, 1991, 1993 > The Regents of the University of California. All rights > reserved. > Copyright (c) 1995-2018 OpenBSD. All rights reserved. https://www.Open > BSD.org > > OpenBSD 6.4 (RAMDISK_CD) #348: Thu Oct 11 13:36:16 MDT 2018 > dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/RAMDISK_C > D > real mem = 4278030336 (4079MB) > avail mem = 4144590848 (3952MB) > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xf6110 (11 entries) > bios0: vendor SeaBIOS version "1.11.0-2.el7" date 04/01/2014 > bios0: Red Hat KVM > acpi0 at bios0: rev 0 > acpi0: tables DSDT FACP APIC > acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat > cpu0 at mainbus0: apid 0 (boot processor) > cpu0: AMD Opteron 63xx class CPU, 3992.09 MHz, 15-02-00 > cpu0: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36 > ,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,PCLMUL,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,x2A > PIC,POPCNT,AES,XSAVE,AVX,F16C,HV,NXE,PAGE1GB,LONG,LAHF,ABM,SSE4A,MASSE, > 3DNOWP,XOP,FMA4,TBM > 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 > fatal protection fault in supervisor mode > trap type 4 code 0 rip ffffffff811c303c cs 8 rflags 10202 cr2 0 cpl e > rsp ffffffff81a06a20 > gsbase 0xffffffff81872ff0 kgsbase 0x0 > panic: trap type 4, code=0, pc=ffffffff811c303c > > The operating system has halted. > Please press any key to reboot. > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Should I report this as a bug ? > > Best Regards, > Strahil Nikolov > > > On Sun, 2018-10-21 at 18:07 +0300, snikolov wrote: > > Hello All, > > > > During install of install64.iso I experience a kernel panic during > > boot of the CD (pc=ffffffff811c303c). > > install64.iso sha256sum is > > 81833b79e23dc0f961ac5fb34484bca66386deb3181ddb8236870fa4f488cdd2 > > which > > matches https://cdn.openbsd.org/pub/OpenBSD/6.4/amd64/SHA256 > > > > I have tested with various CPUs on my RHEL 7.5 and it seems that > > Opteron_G3/G4/G5 and FX-8350 (host-passthrough) causes the > > panic,while > > Opteron_G1/G2 is OK. Booting install63.iso on the same VM is OK and I > > got the installer prompt. > > > > Does anyone observes the same behaviour or it is only me ? > > > > Best Regards, > > Strahil Nikolov >
This appears to be related to the LFENCE serializing MSR change that went in during the last round of side channel analysis fixes: ffffffff811c3037: b9 29 10 01 c0 mov $0xc0011029,%ecx ffffffff811c303c: 0f 32 rdmsr According to the commit, "This MSR is available on all AMD families >= 10h...", and since yours is family 15h, it should work. Maybe that assumption was wrong? -ml
