Turn off ibrs on suspend.
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Authored by kib on Apr 30 2018, 10:30 AM.

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Reviewers: None
Commits: rS333125: Turn off IBRS on suspend.

Summary

Resume starts CPU from the init state, which clears any loaded microcode updates. As result, ibrs MSRs are no longer available, until the microcode is reloaded.

PR: 227866

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Repository

rS FreeBSD src repository - subversion

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Event Timeline

kib created this revision.Apr 30 2018, 10:30 AM

Herald added a subscriber: imp. · View Herald TranscriptApr 30 2018, 10:30 AM

Harbormaster completed remote builds in B16352: Diff 41993.Apr 30 2018, 10:30 AM

kib edited the summary of this revision. (Show Details)Apr 30 2018, 10:31 AM

Also clear exit controls.

Also deactivate the ibrs, NMI depends on it.

This revision was not accepted when it landed; it landed in state Needs Review.Apr 30 2018, 8:18 PM

Closed by commit rS333125: Turn off IBRS on suspend. (authored by kib). · Explain Why

This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Path

Size

head/

sys/

x86/

acpica/

acpi_wakeup.c

12 lines

include/

x86_var.h

3 lines

Diff 42015

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head/sys/x86/acpica/acpi_wakeup.c