* spectre v2 microcodes blacklist (march update)
@ 2018-03-03 21:02 Alexander Sergeyev
2018-03-05 9:17 ` 王金浦
0 siblings, 1 reply; 2+ messages in thread
From: Alexander Sergeyev @ 2018-03-03 21:02 UTC (permalink / raw)
To: David Woodhouse
Cc: Ingo Molnar, Thomas Gleixner, H. Peter Anvin, x86, Kyle Huey,
Greg Kroah-Hartman, Peter Zijlstra, linux-kernel
Hi,
the microcode revision guidance from Intel is revised once again [1] (1 Mar).
It looks like the following:
>Intel document only clears the 0xc2 microcode on *some* parts with CPUID 506E3
>(INTEL_FAM6_SKYLAKE_DESKTOP stepping 3). For the Skylake H/S platform it's OK
>but for Skylake E3 which has the same CPUID it isn't (yet) cleared.
is no longer a problem. CPUID 506E3 with both Skylake H/S and Skylake Xeon E3
is labelled as "production" now.
Could we drop { INTEL_FAM6_SKYLAKE_DESKTOP, 0x03, 0xc2 } from
spectre_bad_microcodes?
[1]
https://newsroom.intel.com/wp-content/uploads/sites/11/2018/03/microcode-update-guidance.pdf
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: spectre v2 microcodes blacklist (march update)
2018-03-03 21:02 spectre v2 microcodes blacklist (march update) Alexander Sergeyev
@ 2018-03-05 9:17 ` 王金浦
0 siblings, 0 replies; 2+ messages in thread
From: 王金浦 @ 2018-03-05 9:17 UTC (permalink / raw)
To: Alexander Sergeyev
Cc: David Woodhouse, Ingo Molnar, Thomas Gleixner, H. Peter Anvin,
x86, Kyle Huey, Greg Kroah-Hartman, Peter Zijlstra, LKML
Hi,
2018-03-03 22:02 GMT+01:00 Alexander Sergeyev <sergeev917@gmail.com>:
> Hi,
>
> the microcode revision guidance from Intel is revised once again [1] (1
> Mar).
>
> It looks like the following:
>
>> Intel document only clears the 0xc2 microcode on *some* parts with CPUID
>> 506E3 (INTEL_FAM6_SKYLAKE_DESKTOP stepping 3). For the Skylake H/S platform
>> it's OK but for Skylake E3 which has the same CPUID it isn't (yet) cleared.
>
>
> is no longer a problem. CPUID 506E3 with both Skylake H/S and Skylake Xeon
> E3 is labelled as "production" now.
>
> Could we drop { INTEL_FAM6_SKYLAKE_DESKTOP, 0x03, 0xc2 } from
> spectre_bad_microcodes?
+1, I have a test machine with cpuid 506e3, dell/intel releases
production BIOS version 0xC2, but due to list as bad_microcode,
IBPB function is disabled.
I would like also vote to get it remove from bad_microcode list.
>
> [1]
> https://newsroom.intel.com/wp-content/uploads/sites/11/2018/03/microcode-update-guidance.pdf
Regards,
Jack
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