Differential D52942

x86: Add a way to inject artificial MCA events for testing
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Authored by jtl on Oct 6 2025, 6:13 PM.

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glebius
lprylli_netflix.com
markj
jhb

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rG40b2111cfaa1: x86: Add a way to inject artificial MCA events for testing
rGfc13cf3c5bd4: x86: Add a way to inject artificial MCA events for testing
rG1c2fc62e4a96: x86: Add a way to inject artificial MCA events for testing

Summary

Obtained from Netflix. The code was originally written by Loic Prylli and lightly modified for me as part of upstreaming. Proposed metadata includes "Obtained from" and "Sponsored by" Netflix.

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rG FreeBSD src repository

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jtl created this revision.Oct 6 2025, 6:13 PM

Herald added a subscriber: imp. · View Herald TranscriptOct 6 2025, 6:13 PM

jtl requested review of this revision.Oct 6 2025, 6:13 PM

Maybe put that under DIAGNOSTIC or similar hiding ifdef? Only one or two people in the world would ever need this. Those who do, definitely would be compiling kernels.

Updated to hide this code under the DIAGNOSTIC kernel config option.

In D52942#1209601, @jtl wrote:

Updated to hide this code under the DIAGNOSTIC kernel config option.

Good idea! I updated the diff to reflect this.

jtl mentioned this in D52946: x86: Allow MCA messages to be rate-limited.Oct 6 2025, 9:30 PM

glebius accepted this revision.Oct 7 2025, 5:43 AM

This revision is now accepted and ready to land.Oct 7 2025, 5:43 AM

jtl mentioned this in D12278: x86: support sending non-fatal MCA messages to syslog.Oct 7 2025, 2:38 PM

lprylli_netflix.com accepted this revision.Oct 7 2025, 4:42 PM

Closed by commit rG1c2fc62e4a96: x86: Add a way to inject artificial MCA events for testing (authored by lprylli_netflix.com, committed by jtl). · Explain WhyOct 7 2025, 4:43 PM

This revision was automatically updated to reflect the committed changes.

jtl added a commit: rG1c2fc62e4a96: x86: Add a way to inject artificial MCA events for testing.

jtl added a commit: rGfc13cf3c5bd4: x86: Add a way to inject artificial MCA events for testing.Oct 28 2025, 7:20 PM

jtl added a commit: rG40b2111cfaa1: x86: Add a way to inject artificial MCA events for testing.Oct 28 2025, 7:25 PM

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Size

sys/

x86/

x86/

29 lines

Diff 163709

sys/x86/x86/mca.c

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