On Tue, Mar 13, 2018 at 2:29 AM, Mike Larkin <[email protected]> wrote: > On Sun, Mar 11, 2018 at 04:33:49PM -0500, Brian Camp wrote: >> I have two systems running 6.2-stable with the meltdown syspatch >> installed. I noticed that while one of them lists "MELTDOWN" in the >> CPU flags, the other does not. The one that does not has a Celeron >> J3455, which Intel lists as affected by meltdown. >> >> Does the absence of the MELTDOWN flag mean that the workaround isn't >> functioning on this machine? Dmesg below. >> >> >> Thanks >> >> -Brian >> > > Odd. Two of us have looked at the detection code again and we can't see any > issues. Can you please do the following to help diagnose? > > 1. install the "cpuid" port package? > > pkg_add cpuid > > 2. send the output of: > > cpuid 0x0 > cpuid 0x7 > > On each of the two machines? (Make sure to say which is the working one > and which is the one where meltdown isn't properly being detected). > > Thanks. > > -ml
Sure thing. Working (i5-4690) - bcamp@z97x-sli:~ (OpenBSD 6.2) $ cpuid 0x0 eax = 0x0000000d 13 "????" ebx = 0x756e6547 1970169159 "Genu" ecx = 0x6c65746e 1818588270 "ntel" edx = 0x49656e69 1231384169 "ineI" bcamp@z97x-sli:~ (OpenBSD 6.2) $ cpuid 0x7 eax = 0x00000000 0 "????" ebx = 0x000027ab 10155 "?'??" ecx = 0x00000000 0 "????" edx = 0x00000000 0 "????" bcamp@z97x-sli:~ (OpenBSD 6.2) $ Non-working (Celeron J3455) - bcamp@nuc6cayh:~ (OpenBSD 6.2) $ cpuid 0x0 eax = 0x00000015 21 "????" ebx = 0x756e6547 1970169159 "Genu" ecx = 0x6c65746e 1818588270 "ntel" edx = 0x49656e69 1231384169 "ineI" bcamp@nuc6cayh:~ (OpenBSD 6.2) $ cpuid 0x7 eax = 0x00000000 0 "????" ebx = 0x2294e283 580182659 "???"" ecx = 0x00000000 0 "????" edx = 0x2c000000 738197504 "???," bcamp@nuc6cayh:~ (OpenBSD 6.2) $ -Brian
